6_songs-from-the-cloud - This is a fork due to permission issues

Users » timbeight » Code » 6_songs-from-the-cloud

Timothy Beight / Mbed 2 deprecated 6_songs-from-the-cloud

This is a fork due to permission issues

Dependencies: mbed Socket lwip-eth lwip-sys lwip

Fork of 6_songs-from-the-cloud by MakingMusicWorkshop

mbed-client/mbedtls/source/rsa.c@0:f7c60d3e7b8a, 2016-05-18 (annotated)

Committer:: maclobdell
Date:: Wed May 18 19:06:32 2016 +0000
Revision:: 0:f7c60d3e7b8a

clean version

Who changed what in which revision?

User	Revision	Line number	New contents of line
maclobdell	0:f7c60d3e7b8a	1	/*
maclobdell	0:f7c60d3e7b8a	2	* The RSA public-key cryptosystem
maclobdell	0:f7c60d3e7b8a	3	*
maclobdell	0:f7c60d3e7b8a	4	* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
maclobdell	0:f7c60d3e7b8a	5	* SPDX-License-Identifier: Apache-2.0
maclobdell	0:f7c60d3e7b8a	6	*
maclobdell	0:f7c60d3e7b8a	7	* Licensed under the Apache License, Version 2.0 (the "License"); you may
maclobdell	0:f7c60d3e7b8a	8	* not use this file except in compliance with the License.
maclobdell	0:f7c60d3e7b8a	9	* You may obtain a copy of the License at
maclobdell	0:f7c60d3e7b8a	10	*
maclobdell	0:f7c60d3e7b8a	11	* http://www.apache.org/licenses/LICENSE-2.0
maclobdell	0:f7c60d3e7b8a	12	*
maclobdell	0:f7c60d3e7b8a	13	* Unless required by applicable law or agreed to in writing, software
maclobdell	0:f7c60d3e7b8a	14	* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
maclobdell	0:f7c60d3e7b8a	15	* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
maclobdell	0:f7c60d3e7b8a	16	* See the License for the specific language governing permissions and
maclobdell	0:f7c60d3e7b8a	17	* limitations under the License.
maclobdell	0:f7c60d3e7b8a	18	*
maclobdell	0:f7c60d3e7b8a	19	* This file is part of mbed TLS (https://tls.mbed.org)
maclobdell	0:f7c60d3e7b8a	20	*/
maclobdell	0:f7c60d3e7b8a	21	/*
maclobdell	0:f7c60d3e7b8a	22	* RSA was designed by Ron Rivest, Adi Shamir and Len Adleman.
maclobdell	0:f7c60d3e7b8a	23	*
maclobdell	0:f7c60d3e7b8a	24	* http://theory.lcs.mit.edu/~rivest/rsapaper.pdf
maclobdell	0:f7c60d3e7b8a	25	* http://www.cacr.math.uwaterloo.ca/hac/about/chap8.pdf
maclobdell	0:f7c60d3e7b8a	26	*/
maclobdell	0:f7c60d3e7b8a	27
maclobdell	0:f7c60d3e7b8a	28	#if !defined(MBEDTLS_CONFIG_FILE)
maclobdell	0:f7c60d3e7b8a	29	#include "mbedtls/config.h"
maclobdell	0:f7c60d3e7b8a	30	#else
maclobdell	0:f7c60d3e7b8a	31	#include MBEDTLS_CONFIG_FILE
maclobdell	0:f7c60d3e7b8a	32	#endif
maclobdell	0:f7c60d3e7b8a	33
maclobdell	0:f7c60d3e7b8a	34	#if defined(MBEDTLS_RSA_C)
maclobdell	0:f7c60d3e7b8a	35
maclobdell	0:f7c60d3e7b8a	36	#include "mbedtls/rsa.h"
maclobdell	0:f7c60d3e7b8a	37	#include "mbedtls/oid.h"
maclobdell	0:f7c60d3e7b8a	38
maclobdell	0:f7c60d3e7b8a	39	#include <string.h>
maclobdell	0:f7c60d3e7b8a	40
maclobdell	0:f7c60d3e7b8a	41	#if defined(MBEDTLS_PKCS1_V21)
maclobdell	0:f7c60d3e7b8a	42	#include "mbedtls/md.h"
maclobdell	0:f7c60d3e7b8a	43	#endif
maclobdell	0:f7c60d3e7b8a	44
maclobdell	0:f7c60d3e7b8a	45	#if defined(MBEDTLS_PKCS1_V15) && !defined(__OpenBSD__)
maclobdell	0:f7c60d3e7b8a	46	#include <stdlib.h>
maclobdell	0:f7c60d3e7b8a	47	#endif
maclobdell	0:f7c60d3e7b8a	48
maclobdell	0:f7c60d3e7b8a	49	#if defined(MBEDTLS_PLATFORM_C)
maclobdell	0:f7c60d3e7b8a	50	#include "mbedtls/platform.h"
maclobdell	0:f7c60d3e7b8a	51	#else
maclobdell	0:f7c60d3e7b8a	52	#include <stdio.h>
maclobdell	0:f7c60d3e7b8a	53	#define mbedtls_printf printf
maclobdell	0:f7c60d3e7b8a	54	#define mbedtls_calloc calloc
maclobdell	0:f7c60d3e7b8a	55	#define mbedtls_free free
maclobdell	0:f7c60d3e7b8a	56	#endif
maclobdell	0:f7c60d3e7b8a	57
maclobdell	0:f7c60d3e7b8a	58	/*
maclobdell	0:f7c60d3e7b8a	59	* Initialize an RSA context
maclobdell	0:f7c60d3e7b8a	60	*/
maclobdell	0:f7c60d3e7b8a	61	void mbedtls_rsa_init( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	62	int padding,
maclobdell	0:f7c60d3e7b8a	63	int hash_id )
maclobdell	0:f7c60d3e7b8a	64	{
maclobdell	0:f7c60d3e7b8a	65	memset( ctx, 0, sizeof( mbedtls_rsa_context ) );
maclobdell	0:f7c60d3e7b8a	66
maclobdell	0:f7c60d3e7b8a	67	mbedtls_rsa_set_padding( ctx, padding, hash_id );
maclobdell	0:f7c60d3e7b8a	68
maclobdell	0:f7c60d3e7b8a	69	#if defined(MBEDTLS_THREADING_C)
maclobdell	0:f7c60d3e7b8a	70	mbedtls_mutex_init( &ctx->mutex );
maclobdell	0:f7c60d3e7b8a	71	#endif
maclobdell	0:f7c60d3e7b8a	72	}
maclobdell	0:f7c60d3e7b8a	73
maclobdell	0:f7c60d3e7b8a	74	/*
maclobdell	0:f7c60d3e7b8a	75	* Set padding for an existing RSA context
maclobdell	0:f7c60d3e7b8a	76	*/
maclobdell	0:f7c60d3e7b8a	77	void mbedtls_rsa_set_padding( mbedtls_rsa_context *ctx, int padding, int hash_id )
maclobdell	0:f7c60d3e7b8a	78	{
maclobdell	0:f7c60d3e7b8a	79	ctx->padding = padding;
maclobdell	0:f7c60d3e7b8a	80	ctx->hash_id = hash_id;
maclobdell	0:f7c60d3e7b8a	81	}
maclobdell	0:f7c60d3e7b8a	82
maclobdell	0:f7c60d3e7b8a	83	#if defined(MBEDTLS_GENPRIME)
maclobdell	0:f7c60d3e7b8a	84
maclobdell	0:f7c60d3e7b8a	85	/*
maclobdell	0:f7c60d3e7b8a	86	* Generate an RSA keypair
maclobdell	0:f7c60d3e7b8a	87	*/
maclobdell	0:f7c60d3e7b8a	88	int mbedtls_rsa_gen_key( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	89	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	90	void *p_rng,
maclobdell	0:f7c60d3e7b8a	91	unsigned int nbits, int exponent )
maclobdell	0:f7c60d3e7b8a	92	{
maclobdell	0:f7c60d3e7b8a	93	int ret;
maclobdell	0:f7c60d3e7b8a	94	mbedtls_mpi P1, Q1, H, G;
maclobdell	0:f7c60d3e7b8a	95
maclobdell	0:f7c60d3e7b8a	96	if( f_rng == NULL \|\| nbits < 128 \|\| exponent < 3 )
maclobdell	0:f7c60d3e7b8a	97	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	98
maclobdell	0:f7c60d3e7b8a	99	mbedtls_mpi_init( &P1 ); mbedtls_mpi_init( &Q1 ); mbedtls_mpi_init( &H ); mbedtls_mpi_init( &G );
maclobdell	0:f7c60d3e7b8a	100
maclobdell	0:f7c60d3e7b8a	101	/*
maclobdell	0:f7c60d3e7b8a	102	* find primes P and Q with Q < P so that:
maclobdell	0:f7c60d3e7b8a	103	* GCD( E, (P-1)*(Q-1) ) == 1
maclobdell	0:f7c60d3e7b8a	104	*/
maclobdell	0:f7c60d3e7b8a	105	MBEDTLS_MPI_CHK( mbedtls_mpi_lset( &ctx->E, exponent ) );
maclobdell	0:f7c60d3e7b8a	106
maclobdell	0:f7c60d3e7b8a	107	do
maclobdell	0:f7c60d3e7b8a	108	{
maclobdell	0:f7c60d3e7b8a	109	MBEDTLS_MPI_CHK( mbedtls_mpi_gen_prime( &ctx->P, ( nbits + 1 ) >> 1, 0,
maclobdell	0:f7c60d3e7b8a	110	f_rng, p_rng ) );
maclobdell	0:f7c60d3e7b8a	111
maclobdell	0:f7c60d3e7b8a	112	MBEDTLS_MPI_CHK( mbedtls_mpi_gen_prime( &ctx->Q, ( nbits + 1 ) >> 1, 0,
maclobdell	0:f7c60d3e7b8a	113	f_rng, p_rng ) );
maclobdell	0:f7c60d3e7b8a	114
maclobdell	0:f7c60d3e7b8a	115	if( mbedtls_mpi_cmp_mpi( &ctx->P, &ctx->Q ) < 0 )
maclobdell	0:f7c60d3e7b8a	116	mbedtls_mpi_swap( &ctx->P, &ctx->Q );
maclobdell	0:f7c60d3e7b8a	117
maclobdell	0:f7c60d3e7b8a	118	if( mbedtls_mpi_cmp_mpi( &ctx->P, &ctx->Q ) == 0 )
maclobdell	0:f7c60d3e7b8a	119	continue;
maclobdell	0:f7c60d3e7b8a	120
maclobdell	0:f7c60d3e7b8a	121	MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &ctx->N, &ctx->P, &ctx->Q ) );
maclobdell	0:f7c60d3e7b8a	122	if( mbedtls_mpi_bitlen( &ctx->N ) != nbits )
maclobdell	0:f7c60d3e7b8a	123	continue;
maclobdell	0:f7c60d3e7b8a	124
maclobdell	0:f7c60d3e7b8a	125	MBEDTLS_MPI_CHK( mbedtls_mpi_sub_int( &P1, &ctx->P, 1 ) );
maclobdell	0:f7c60d3e7b8a	126	MBEDTLS_MPI_CHK( mbedtls_mpi_sub_int( &Q1, &ctx->Q, 1 ) );
maclobdell	0:f7c60d3e7b8a	127	MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &H, &P1, &Q1 ) );
maclobdell	0:f7c60d3e7b8a	128	MBEDTLS_MPI_CHK( mbedtls_mpi_gcd( &G, &ctx->E, &H ) );
maclobdell	0:f7c60d3e7b8a	129	}
maclobdell	0:f7c60d3e7b8a	130	while( mbedtls_mpi_cmp_int( &G, 1 ) != 0 );
maclobdell	0:f7c60d3e7b8a	131
maclobdell	0:f7c60d3e7b8a	132	/*
maclobdell	0:f7c60d3e7b8a	133	* D = E^-1 mod ((P-1)*(Q-1))
maclobdell	0:f7c60d3e7b8a	134	* DP = D mod (P - 1)
maclobdell	0:f7c60d3e7b8a	135	* DQ = D mod (Q - 1)
maclobdell	0:f7c60d3e7b8a	136	* QP = Q^-1 mod P
maclobdell	0:f7c60d3e7b8a	137	*/
maclobdell	0:f7c60d3e7b8a	138	MBEDTLS_MPI_CHK( mbedtls_mpi_inv_mod( &ctx->D , &ctx->E, &H ) );
maclobdell	0:f7c60d3e7b8a	139	MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &ctx->DP, &ctx->D, &P1 ) );
maclobdell	0:f7c60d3e7b8a	140	MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &ctx->DQ, &ctx->D, &Q1 ) );
maclobdell	0:f7c60d3e7b8a	141	MBEDTLS_MPI_CHK( mbedtls_mpi_inv_mod( &ctx->QP, &ctx->Q, &ctx->P ) );
maclobdell	0:f7c60d3e7b8a	142
maclobdell	0:f7c60d3e7b8a	143	ctx->len = ( mbedtls_mpi_bitlen( &ctx->N ) + 7 ) >> 3;
maclobdell	0:f7c60d3e7b8a	144
maclobdell	0:f7c60d3e7b8a	145	cleanup:
maclobdell	0:f7c60d3e7b8a	146
maclobdell	0:f7c60d3e7b8a	147	mbedtls_mpi_free( &P1 ); mbedtls_mpi_free( &Q1 ); mbedtls_mpi_free( &H ); mbedtls_mpi_free( &G );
maclobdell	0:f7c60d3e7b8a	148
maclobdell	0:f7c60d3e7b8a	149	if( ret != 0 )
maclobdell	0:f7c60d3e7b8a	150	{
maclobdell	0:f7c60d3e7b8a	151	mbedtls_rsa_free( ctx );
maclobdell	0:f7c60d3e7b8a	152	return( MBEDTLS_ERR_RSA_KEY_GEN_FAILED + ret );
maclobdell	0:f7c60d3e7b8a	153	}
maclobdell	0:f7c60d3e7b8a	154
maclobdell	0:f7c60d3e7b8a	155	return( 0 );
maclobdell	0:f7c60d3e7b8a	156	}
maclobdell	0:f7c60d3e7b8a	157
maclobdell	0:f7c60d3e7b8a	158	#endif /* MBEDTLS_GENPRIME */
maclobdell	0:f7c60d3e7b8a	159
maclobdell	0:f7c60d3e7b8a	160	/*
maclobdell	0:f7c60d3e7b8a	161	* Check a public RSA key
maclobdell	0:f7c60d3e7b8a	162	*/
maclobdell	0:f7c60d3e7b8a	163	int mbedtls_rsa_check_pubkey( const mbedtls_rsa_context *ctx )
maclobdell	0:f7c60d3e7b8a	164	{
maclobdell	0:f7c60d3e7b8a	165	if( !ctx->N.p \|\| !ctx->E.p )
maclobdell	0:f7c60d3e7b8a	166	return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
maclobdell	0:f7c60d3e7b8a	167
maclobdell	0:f7c60d3e7b8a	168	if( ( ctx->N.p[0] & 1 ) == 0 \|\|
maclobdell	0:f7c60d3e7b8a	169	( ctx->E.p[0] & 1 ) == 0 )
maclobdell	0:f7c60d3e7b8a	170	return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
maclobdell	0:f7c60d3e7b8a	171
maclobdell	0:f7c60d3e7b8a	172	if( mbedtls_mpi_bitlen( &ctx->N ) < 128 \|\|
maclobdell	0:f7c60d3e7b8a	173	mbedtls_mpi_bitlen( &ctx->N ) > MBEDTLS_MPI_MAX_BITS )
maclobdell	0:f7c60d3e7b8a	174	return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
maclobdell	0:f7c60d3e7b8a	175
maclobdell	0:f7c60d3e7b8a	176	if( mbedtls_mpi_bitlen( &ctx->E ) < 2 \|\|
maclobdell	0:f7c60d3e7b8a	177	mbedtls_mpi_cmp_mpi( &ctx->E, &ctx->N ) >= 0 )
maclobdell	0:f7c60d3e7b8a	178	return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
maclobdell	0:f7c60d3e7b8a	179
maclobdell	0:f7c60d3e7b8a	180	return( 0 );
maclobdell	0:f7c60d3e7b8a	181	}
maclobdell	0:f7c60d3e7b8a	182
maclobdell	0:f7c60d3e7b8a	183	/*
maclobdell	0:f7c60d3e7b8a	184	* Check a private RSA key
maclobdell	0:f7c60d3e7b8a	185	*/
maclobdell	0:f7c60d3e7b8a	186	int mbedtls_rsa_check_privkey( const mbedtls_rsa_context *ctx )
maclobdell	0:f7c60d3e7b8a	187	{
maclobdell	0:f7c60d3e7b8a	188	int ret;
maclobdell	0:f7c60d3e7b8a	189	mbedtls_mpi PQ, DE, P1, Q1, H, I, G, G2, L1, L2, DP, DQ, QP;
maclobdell	0:f7c60d3e7b8a	190
maclobdell	0:f7c60d3e7b8a	191	if( ( ret = mbedtls_rsa_check_pubkey( ctx ) ) != 0 )
maclobdell	0:f7c60d3e7b8a	192	return( ret );
maclobdell	0:f7c60d3e7b8a	193
maclobdell	0:f7c60d3e7b8a	194	if( !ctx->P.p \|\| !ctx->Q.p \|\| !ctx->D.p )
maclobdell	0:f7c60d3e7b8a	195	return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
maclobdell	0:f7c60d3e7b8a	196
maclobdell	0:f7c60d3e7b8a	197	mbedtls_mpi_init( &PQ ); mbedtls_mpi_init( &DE ); mbedtls_mpi_init( &P1 ); mbedtls_mpi_init( &Q1 );
maclobdell	0:f7c60d3e7b8a	198	mbedtls_mpi_init( &H ); mbedtls_mpi_init( &I ); mbedtls_mpi_init( &G ); mbedtls_mpi_init( &G2 );
maclobdell	0:f7c60d3e7b8a	199	mbedtls_mpi_init( &L1 ); mbedtls_mpi_init( &L2 ); mbedtls_mpi_init( &DP ); mbedtls_mpi_init( &DQ );
maclobdell	0:f7c60d3e7b8a	200	mbedtls_mpi_init( &QP );
maclobdell	0:f7c60d3e7b8a	201
maclobdell	0:f7c60d3e7b8a	202	MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &PQ, &ctx->P, &ctx->Q ) );
maclobdell	0:f7c60d3e7b8a	203	MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &DE, &ctx->D, &ctx->E ) );
maclobdell	0:f7c60d3e7b8a	204	MBEDTLS_MPI_CHK( mbedtls_mpi_sub_int( &P1, &ctx->P, 1 ) );
maclobdell	0:f7c60d3e7b8a	205	MBEDTLS_MPI_CHK( mbedtls_mpi_sub_int( &Q1, &ctx->Q, 1 ) );
maclobdell	0:f7c60d3e7b8a	206	MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &H, &P1, &Q1 ) );
maclobdell	0:f7c60d3e7b8a	207	MBEDTLS_MPI_CHK( mbedtls_mpi_gcd( &G, &ctx->E, &H ) );
maclobdell	0:f7c60d3e7b8a	208
maclobdell	0:f7c60d3e7b8a	209	MBEDTLS_MPI_CHK( mbedtls_mpi_gcd( &G2, &P1, &Q1 ) );
maclobdell	0:f7c60d3e7b8a	210	MBEDTLS_MPI_CHK( mbedtls_mpi_div_mpi( &L1, &L2, &H, &G2 ) );
maclobdell	0:f7c60d3e7b8a	211	MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &I, &DE, &L1 ) );
maclobdell	0:f7c60d3e7b8a	212
maclobdell	0:f7c60d3e7b8a	213	MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &DP, &ctx->D, &P1 ) );
maclobdell	0:f7c60d3e7b8a	214	MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &DQ, &ctx->D, &Q1 ) );
maclobdell	0:f7c60d3e7b8a	215	MBEDTLS_MPI_CHK( mbedtls_mpi_inv_mod( &QP, &ctx->Q, &ctx->P ) );
maclobdell	0:f7c60d3e7b8a	216	/*
maclobdell	0:f7c60d3e7b8a	217	* Check for a valid PKCS1v2 private key
maclobdell	0:f7c60d3e7b8a	218	*/
maclobdell	0:f7c60d3e7b8a	219	if( mbedtls_mpi_cmp_mpi( &PQ, &ctx->N ) != 0 \|\|
maclobdell	0:f7c60d3e7b8a	220	mbedtls_mpi_cmp_mpi( &DP, &ctx->DP ) != 0 \|\|
maclobdell	0:f7c60d3e7b8a	221	mbedtls_mpi_cmp_mpi( &DQ, &ctx->DQ ) != 0 \|\|
maclobdell	0:f7c60d3e7b8a	222	mbedtls_mpi_cmp_mpi( &QP, &ctx->QP ) != 0 \|\|
maclobdell	0:f7c60d3e7b8a	223	mbedtls_mpi_cmp_int( &L2, 0 ) != 0 \|\|
maclobdell	0:f7c60d3e7b8a	224	mbedtls_mpi_cmp_int( &I, 1 ) != 0 \|\|
maclobdell	0:f7c60d3e7b8a	225	mbedtls_mpi_cmp_int( &G, 1 ) != 0 )
maclobdell	0:f7c60d3e7b8a	226	{
maclobdell	0:f7c60d3e7b8a	227	ret = MBEDTLS_ERR_RSA_KEY_CHECK_FAILED;
maclobdell	0:f7c60d3e7b8a	228	}
maclobdell	0:f7c60d3e7b8a	229
maclobdell	0:f7c60d3e7b8a	230	cleanup:
maclobdell	0:f7c60d3e7b8a	231	mbedtls_mpi_free( &PQ ); mbedtls_mpi_free( &DE ); mbedtls_mpi_free( &P1 ); mbedtls_mpi_free( &Q1 );
maclobdell	0:f7c60d3e7b8a	232	mbedtls_mpi_free( &H ); mbedtls_mpi_free( &I ); mbedtls_mpi_free( &G ); mbedtls_mpi_free( &G2 );
maclobdell	0:f7c60d3e7b8a	233	mbedtls_mpi_free( &L1 ); mbedtls_mpi_free( &L2 ); mbedtls_mpi_free( &DP ); mbedtls_mpi_free( &DQ );
maclobdell	0:f7c60d3e7b8a	234	mbedtls_mpi_free( &QP );
maclobdell	0:f7c60d3e7b8a	235
maclobdell	0:f7c60d3e7b8a	236	if( ret == MBEDTLS_ERR_RSA_KEY_CHECK_FAILED )
maclobdell	0:f7c60d3e7b8a	237	return( ret );
maclobdell	0:f7c60d3e7b8a	238
maclobdell	0:f7c60d3e7b8a	239	if( ret != 0 )
maclobdell	0:f7c60d3e7b8a	240	return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED + ret );
maclobdell	0:f7c60d3e7b8a	241
maclobdell	0:f7c60d3e7b8a	242	return( 0 );
maclobdell	0:f7c60d3e7b8a	243	}
maclobdell	0:f7c60d3e7b8a	244
maclobdell	0:f7c60d3e7b8a	245	/*
maclobdell	0:f7c60d3e7b8a	246	* Check if contexts holding a public and private key match
maclobdell	0:f7c60d3e7b8a	247	*/
maclobdell	0:f7c60d3e7b8a	248	int mbedtls_rsa_check_pub_priv( const mbedtls_rsa_context pub, const mbedtls_rsa_context prv )
maclobdell	0:f7c60d3e7b8a	249	{
maclobdell	0:f7c60d3e7b8a	250	if( mbedtls_rsa_check_pubkey( pub ) != 0 \|\|
maclobdell	0:f7c60d3e7b8a	251	mbedtls_rsa_check_privkey( prv ) != 0 )
maclobdell	0:f7c60d3e7b8a	252	{
maclobdell	0:f7c60d3e7b8a	253	return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
maclobdell	0:f7c60d3e7b8a	254	}
maclobdell	0:f7c60d3e7b8a	255
maclobdell	0:f7c60d3e7b8a	256	if( mbedtls_mpi_cmp_mpi( &pub->N, &prv->N ) != 0 \|\|
maclobdell	0:f7c60d3e7b8a	257	mbedtls_mpi_cmp_mpi( &pub->E, &prv->E ) != 0 )
maclobdell	0:f7c60d3e7b8a	258	{
maclobdell	0:f7c60d3e7b8a	259	return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
maclobdell	0:f7c60d3e7b8a	260	}
maclobdell	0:f7c60d3e7b8a	261
maclobdell	0:f7c60d3e7b8a	262	return( 0 );
maclobdell	0:f7c60d3e7b8a	263	}
maclobdell	0:f7c60d3e7b8a	264
maclobdell	0:f7c60d3e7b8a	265	/*
maclobdell	0:f7c60d3e7b8a	266	* Do an RSA public key operation
maclobdell	0:f7c60d3e7b8a	267	*/
maclobdell	0:f7c60d3e7b8a	268	int mbedtls_rsa_public( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	269	const unsigned char *input,
maclobdell	0:f7c60d3e7b8a	270	unsigned char *output )
maclobdell	0:f7c60d3e7b8a	271	{
maclobdell	0:f7c60d3e7b8a	272	int ret;
maclobdell	0:f7c60d3e7b8a	273	size_t olen;
maclobdell	0:f7c60d3e7b8a	274	mbedtls_mpi T;
maclobdell	0:f7c60d3e7b8a	275
maclobdell	0:f7c60d3e7b8a	276	mbedtls_mpi_init( &T );
maclobdell	0:f7c60d3e7b8a	277
maclobdell	0:f7c60d3e7b8a	278	#if defined(MBEDTLS_THREADING_C)
maclobdell	0:f7c60d3e7b8a	279	if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
maclobdell	0:f7c60d3e7b8a	280	return( ret );
maclobdell	0:f7c60d3e7b8a	281	#endif
maclobdell	0:f7c60d3e7b8a	282
maclobdell	0:f7c60d3e7b8a	283	MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &T, input, ctx->len ) );
maclobdell	0:f7c60d3e7b8a	284
maclobdell	0:f7c60d3e7b8a	285	if( mbedtls_mpi_cmp_mpi( &T, &ctx->N ) >= 0 )
maclobdell	0:f7c60d3e7b8a	286	{
maclobdell	0:f7c60d3e7b8a	287	ret = MBEDTLS_ERR_MPI_BAD_INPUT_DATA;
maclobdell	0:f7c60d3e7b8a	288	goto cleanup;
maclobdell	0:f7c60d3e7b8a	289	}
maclobdell	0:f7c60d3e7b8a	290
maclobdell	0:f7c60d3e7b8a	291	olen = ctx->len;
maclobdell	0:f7c60d3e7b8a	292	MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &T, &T, &ctx->E, &ctx->N, &ctx->RN ) );
maclobdell	0:f7c60d3e7b8a	293	MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &T, output, olen ) );
maclobdell	0:f7c60d3e7b8a	294
maclobdell	0:f7c60d3e7b8a	295	cleanup:
maclobdell	0:f7c60d3e7b8a	296	#if defined(MBEDTLS_THREADING_C)
maclobdell	0:f7c60d3e7b8a	297	if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
maclobdell	0:f7c60d3e7b8a	298	return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
maclobdell	0:f7c60d3e7b8a	299	#endif
maclobdell	0:f7c60d3e7b8a	300
maclobdell	0:f7c60d3e7b8a	301	mbedtls_mpi_free( &T );
maclobdell	0:f7c60d3e7b8a	302
maclobdell	0:f7c60d3e7b8a	303	if( ret != 0 )
maclobdell	0:f7c60d3e7b8a	304	return( MBEDTLS_ERR_RSA_PUBLIC_FAILED + ret );
maclobdell	0:f7c60d3e7b8a	305
maclobdell	0:f7c60d3e7b8a	306	return( 0 );
maclobdell	0:f7c60d3e7b8a	307	}
maclobdell	0:f7c60d3e7b8a	308
maclobdell	0:f7c60d3e7b8a	309	/*
maclobdell	0:f7c60d3e7b8a	310	* Generate or update blinding values, see section 10 of:
maclobdell	0:f7c60d3e7b8a	311	* KOCHER, Paul C. Timing attacks on implementations of Diffie-Hellman, RSA,
maclobdell	0:f7c60d3e7b8a	312	* DSS, and other systems. In : Advances in Cryptology-CRYPTO'96. Springer
maclobdell	0:f7c60d3e7b8a	313	* Berlin Heidelberg, 1996. p. 104-113.
maclobdell	0:f7c60d3e7b8a	314	*/
maclobdell	0:f7c60d3e7b8a	315	static int rsa_prepare_blinding( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	316	int (f_rng)(void , unsigned char , size_t), void p_rng )
maclobdell	0:f7c60d3e7b8a	317	{
maclobdell	0:f7c60d3e7b8a	318	int ret, count = 0;
maclobdell	0:f7c60d3e7b8a	319
maclobdell	0:f7c60d3e7b8a	320	if( ctx->Vf.p != NULL )
maclobdell	0:f7c60d3e7b8a	321	{
maclobdell	0:f7c60d3e7b8a	322	/* We already have blinding values, just update them by squaring */
maclobdell	0:f7c60d3e7b8a	323	MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &ctx->Vi, &ctx->Vi, &ctx->Vi ) );
maclobdell	0:f7c60d3e7b8a	324	MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &ctx->Vi, &ctx->Vi, &ctx->N ) );
maclobdell	0:f7c60d3e7b8a	325	MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &ctx->Vf, &ctx->Vf, &ctx->Vf ) );
maclobdell	0:f7c60d3e7b8a	326	MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &ctx->Vf, &ctx->Vf, &ctx->N ) );
maclobdell	0:f7c60d3e7b8a	327
maclobdell	0:f7c60d3e7b8a	328	goto cleanup;
maclobdell	0:f7c60d3e7b8a	329	}
maclobdell	0:f7c60d3e7b8a	330
maclobdell	0:f7c60d3e7b8a	331	/* Unblinding value: Vf = random number, invertible mod N */
maclobdell	0:f7c60d3e7b8a	332	do {
maclobdell	0:f7c60d3e7b8a	333	if( count++ > 10 )
maclobdell	0:f7c60d3e7b8a	334	return( MBEDTLS_ERR_RSA_RNG_FAILED );
maclobdell	0:f7c60d3e7b8a	335
maclobdell	0:f7c60d3e7b8a	336	MBEDTLS_MPI_CHK( mbedtls_mpi_fill_random( &ctx->Vf, ctx->len - 1, f_rng, p_rng ) );
maclobdell	0:f7c60d3e7b8a	337	MBEDTLS_MPI_CHK( mbedtls_mpi_gcd( &ctx->Vi, &ctx->Vf, &ctx->N ) );
maclobdell	0:f7c60d3e7b8a	338	} while( mbedtls_mpi_cmp_int( &ctx->Vi, 1 ) != 0 );
maclobdell	0:f7c60d3e7b8a	339
maclobdell	0:f7c60d3e7b8a	340	/* Blinding value: Vi = Vf^(-e) mod N */
maclobdell	0:f7c60d3e7b8a	341	MBEDTLS_MPI_CHK( mbedtls_mpi_inv_mod( &ctx->Vi, &ctx->Vf, &ctx->N ) );
maclobdell	0:f7c60d3e7b8a	342	MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &ctx->Vi, &ctx->Vi, &ctx->E, &ctx->N, &ctx->RN ) );
maclobdell	0:f7c60d3e7b8a	343
maclobdell	0:f7c60d3e7b8a	344
maclobdell	0:f7c60d3e7b8a	345	cleanup:
maclobdell	0:f7c60d3e7b8a	346	return( ret );
maclobdell	0:f7c60d3e7b8a	347	}
maclobdell	0:f7c60d3e7b8a	348
maclobdell	0:f7c60d3e7b8a	349	/*
maclobdell	0:f7c60d3e7b8a	350	* Do an RSA private key operation
maclobdell	0:f7c60d3e7b8a	351	*/
maclobdell	0:f7c60d3e7b8a	352	int mbedtls_rsa_private( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	353	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	354	void *p_rng,
maclobdell	0:f7c60d3e7b8a	355	const unsigned char *input,
maclobdell	0:f7c60d3e7b8a	356	unsigned char *output )
maclobdell	0:f7c60d3e7b8a	357	{
maclobdell	0:f7c60d3e7b8a	358	int ret;
maclobdell	0:f7c60d3e7b8a	359	size_t olen;
maclobdell	0:f7c60d3e7b8a	360	mbedtls_mpi T, T1, T2;
maclobdell	0:f7c60d3e7b8a	361
maclobdell	0:f7c60d3e7b8a	362	/* Make sure we have private key info, prevent possible misuse */
maclobdell	0:f7c60d3e7b8a	363	if( ctx->P.p == NULL \|\| ctx->Q.p == NULL \|\| ctx->D.p == NULL )
maclobdell	0:f7c60d3e7b8a	364	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	365
maclobdell	0:f7c60d3e7b8a	366	mbedtls_mpi_init( &T ); mbedtls_mpi_init( &T1 ); mbedtls_mpi_init( &T2 );
maclobdell	0:f7c60d3e7b8a	367
maclobdell	0:f7c60d3e7b8a	368	#if defined(MBEDTLS_THREADING_C)
maclobdell	0:f7c60d3e7b8a	369	if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
maclobdell	0:f7c60d3e7b8a	370	return( ret );
maclobdell	0:f7c60d3e7b8a	371	#endif
maclobdell	0:f7c60d3e7b8a	372
maclobdell	0:f7c60d3e7b8a	373	MBEDTLS_MPI_CHK( mbedtls_mpi_read_binary( &T, input, ctx->len ) );
maclobdell	0:f7c60d3e7b8a	374	if( mbedtls_mpi_cmp_mpi( &T, &ctx->N ) >= 0 )
maclobdell	0:f7c60d3e7b8a	375	{
maclobdell	0:f7c60d3e7b8a	376	ret = MBEDTLS_ERR_MPI_BAD_INPUT_DATA;
maclobdell	0:f7c60d3e7b8a	377	goto cleanup;
maclobdell	0:f7c60d3e7b8a	378	}
maclobdell	0:f7c60d3e7b8a	379
maclobdell	0:f7c60d3e7b8a	380	if( f_rng != NULL )
maclobdell	0:f7c60d3e7b8a	381	{
maclobdell	0:f7c60d3e7b8a	382	/*
maclobdell	0:f7c60d3e7b8a	383	* Blinding
maclobdell	0:f7c60d3e7b8a	384	* T = T * Vi mod N
maclobdell	0:f7c60d3e7b8a	385	*/
maclobdell	0:f7c60d3e7b8a	386	MBEDTLS_MPI_CHK( rsa_prepare_blinding( ctx, f_rng, p_rng ) );
maclobdell	0:f7c60d3e7b8a	387	MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &T, &T, &ctx->Vi ) );
maclobdell	0:f7c60d3e7b8a	388	MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &T, &T, &ctx->N ) );
maclobdell	0:f7c60d3e7b8a	389	}
maclobdell	0:f7c60d3e7b8a	390
maclobdell	0:f7c60d3e7b8a	391	#if defined(MBEDTLS_RSA_NO_CRT)
maclobdell	0:f7c60d3e7b8a	392	MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &T, &T, &ctx->D, &ctx->N, &ctx->RN ) );
maclobdell	0:f7c60d3e7b8a	393	#else
maclobdell	0:f7c60d3e7b8a	394	/*
maclobdell	0:f7c60d3e7b8a	395	* faster decryption using the CRT
maclobdell	0:f7c60d3e7b8a	396	*
maclobdell	0:f7c60d3e7b8a	397	* T1 = input ^ dP mod P
maclobdell	0:f7c60d3e7b8a	398	* T2 = input ^ dQ mod Q
maclobdell	0:f7c60d3e7b8a	399	*/
maclobdell	0:f7c60d3e7b8a	400	MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &T1, &T, &ctx->DP, &ctx->P, &ctx->RP ) );
maclobdell	0:f7c60d3e7b8a	401	MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &T2, &T, &ctx->DQ, &ctx->Q, &ctx->RQ ) );
maclobdell	0:f7c60d3e7b8a	402
maclobdell	0:f7c60d3e7b8a	403	/*
maclobdell	0:f7c60d3e7b8a	404	* T = (T1 - T2) * (Q^-1 mod P) mod P
maclobdell	0:f7c60d3e7b8a	405	*/
maclobdell	0:f7c60d3e7b8a	406	MBEDTLS_MPI_CHK( mbedtls_mpi_sub_mpi( &T, &T1, &T2 ) );
maclobdell	0:f7c60d3e7b8a	407	MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &T1, &T, &ctx->QP ) );
maclobdell	0:f7c60d3e7b8a	408	MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &T, &T1, &ctx->P ) );
maclobdell	0:f7c60d3e7b8a	409
maclobdell	0:f7c60d3e7b8a	410	/*
maclobdell	0:f7c60d3e7b8a	411	* T = T2 + T * Q
maclobdell	0:f7c60d3e7b8a	412	*/
maclobdell	0:f7c60d3e7b8a	413	MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &T1, &T, &ctx->Q ) );
maclobdell	0:f7c60d3e7b8a	414	MBEDTLS_MPI_CHK( mbedtls_mpi_add_mpi( &T, &T2, &T1 ) );
maclobdell	0:f7c60d3e7b8a	415	#endif /* MBEDTLS_RSA_NO_CRT */
maclobdell	0:f7c60d3e7b8a	416
maclobdell	0:f7c60d3e7b8a	417	if( f_rng != NULL )
maclobdell	0:f7c60d3e7b8a	418	{
maclobdell	0:f7c60d3e7b8a	419	/*
maclobdell	0:f7c60d3e7b8a	420	* Unblind
maclobdell	0:f7c60d3e7b8a	421	* T = T * Vf mod N
maclobdell	0:f7c60d3e7b8a	422	*/
maclobdell	0:f7c60d3e7b8a	423	MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &T, &T, &ctx->Vf ) );
maclobdell	0:f7c60d3e7b8a	424	MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &T, &T, &ctx->N ) );
maclobdell	0:f7c60d3e7b8a	425	}
maclobdell	0:f7c60d3e7b8a	426
maclobdell	0:f7c60d3e7b8a	427	olen = ctx->len;
maclobdell	0:f7c60d3e7b8a	428	MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( &T, output, olen ) );
maclobdell	0:f7c60d3e7b8a	429
maclobdell	0:f7c60d3e7b8a	430	cleanup:
maclobdell	0:f7c60d3e7b8a	431	#if defined(MBEDTLS_THREADING_C)
maclobdell	0:f7c60d3e7b8a	432	if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
maclobdell	0:f7c60d3e7b8a	433	return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
maclobdell	0:f7c60d3e7b8a	434	#endif
maclobdell	0:f7c60d3e7b8a	435
maclobdell	0:f7c60d3e7b8a	436	mbedtls_mpi_free( &T ); mbedtls_mpi_free( &T1 ); mbedtls_mpi_free( &T2 );
maclobdell	0:f7c60d3e7b8a	437
maclobdell	0:f7c60d3e7b8a	438	if( ret != 0 )
maclobdell	0:f7c60d3e7b8a	439	return( MBEDTLS_ERR_RSA_PRIVATE_FAILED + ret );
maclobdell	0:f7c60d3e7b8a	440
maclobdell	0:f7c60d3e7b8a	441	return( 0 );
maclobdell	0:f7c60d3e7b8a	442	}
maclobdell	0:f7c60d3e7b8a	443
maclobdell	0:f7c60d3e7b8a	444	#if defined(MBEDTLS_PKCS1_V21)
maclobdell	0:f7c60d3e7b8a	445	/**
maclobdell	0:f7c60d3e7b8a	446	* Generate and apply the MGF1 operation (from PKCS#1 v2.1) to a buffer.
maclobdell	0:f7c60d3e7b8a	447	*
maclobdell	0:f7c60d3e7b8a	448	* \param dst buffer to mask
maclobdell	0:f7c60d3e7b8a	449	* \param dlen length of destination buffer
maclobdell	0:f7c60d3e7b8a	450	* \param src source of the mask generation
maclobdell	0:f7c60d3e7b8a	451	* \param slen length of the source buffer
maclobdell	0:f7c60d3e7b8a	452	* \param md_ctx message digest context to use
maclobdell	0:f7c60d3e7b8a	453	*/
maclobdell	0:f7c60d3e7b8a	454	static void mgf_mask( unsigned char dst, size_t dlen, unsigned char src,
maclobdell	0:f7c60d3e7b8a	455	size_t slen, mbedtls_md_context_t *md_ctx )
maclobdell	0:f7c60d3e7b8a	456	{
maclobdell	0:f7c60d3e7b8a	457	unsigned char mask[MBEDTLS_MD_MAX_SIZE];
maclobdell	0:f7c60d3e7b8a	458	unsigned char counter[4];
maclobdell	0:f7c60d3e7b8a	459	unsigned char *p;
maclobdell	0:f7c60d3e7b8a	460	unsigned int hlen;
maclobdell	0:f7c60d3e7b8a	461	size_t i, use_len;
maclobdell	0:f7c60d3e7b8a	462
maclobdell	0:f7c60d3e7b8a	463	memset( mask, 0, MBEDTLS_MD_MAX_SIZE );
maclobdell	0:f7c60d3e7b8a	464	memset( counter, 0, 4 );
maclobdell	0:f7c60d3e7b8a	465
maclobdell	0:f7c60d3e7b8a	466	hlen = mbedtls_md_get_size( md_ctx->md_info );
maclobdell	0:f7c60d3e7b8a	467
maclobdell	0:f7c60d3e7b8a	468	// Generate and apply dbMask
maclobdell	0:f7c60d3e7b8a	469	//
maclobdell	0:f7c60d3e7b8a	470	p = dst;
maclobdell	0:f7c60d3e7b8a	471
maclobdell	0:f7c60d3e7b8a	472	while( dlen > 0 )
maclobdell	0:f7c60d3e7b8a	473	{
maclobdell	0:f7c60d3e7b8a	474	use_len = hlen;
maclobdell	0:f7c60d3e7b8a	475	if( dlen < hlen )
maclobdell	0:f7c60d3e7b8a	476	use_len = dlen;
maclobdell	0:f7c60d3e7b8a	477
maclobdell	0:f7c60d3e7b8a	478	mbedtls_md_starts( md_ctx );
maclobdell	0:f7c60d3e7b8a	479	mbedtls_md_update( md_ctx, src, slen );
maclobdell	0:f7c60d3e7b8a	480	mbedtls_md_update( md_ctx, counter, 4 );
maclobdell	0:f7c60d3e7b8a	481	mbedtls_md_finish( md_ctx, mask );
maclobdell	0:f7c60d3e7b8a	482
maclobdell	0:f7c60d3e7b8a	483	for( i = 0; i < use_len; ++i )
maclobdell	0:f7c60d3e7b8a	484	*p++ ^= mask[i];
maclobdell	0:f7c60d3e7b8a	485
maclobdell	0:f7c60d3e7b8a	486	counter[3]++;
maclobdell	0:f7c60d3e7b8a	487
maclobdell	0:f7c60d3e7b8a	488	dlen -= use_len;
maclobdell	0:f7c60d3e7b8a	489	}
maclobdell	0:f7c60d3e7b8a	490	}
maclobdell	0:f7c60d3e7b8a	491	#endif /* MBEDTLS_PKCS1_V21 */
maclobdell	0:f7c60d3e7b8a	492
maclobdell	0:f7c60d3e7b8a	493	#if defined(MBEDTLS_PKCS1_V21)
maclobdell	0:f7c60d3e7b8a	494	/*
maclobdell	0:f7c60d3e7b8a	495	* Implementation of the PKCS#1 v2.1 RSAES-OAEP-ENCRYPT function
maclobdell	0:f7c60d3e7b8a	496	*/
maclobdell	0:f7c60d3e7b8a	497	int mbedtls_rsa_rsaes_oaep_encrypt( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	498	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	499	void *p_rng,
maclobdell	0:f7c60d3e7b8a	500	int mode,
maclobdell	0:f7c60d3e7b8a	501	const unsigned char *label, size_t label_len,
maclobdell	0:f7c60d3e7b8a	502	size_t ilen,
maclobdell	0:f7c60d3e7b8a	503	const unsigned char *input,
maclobdell	0:f7c60d3e7b8a	504	unsigned char *output )
maclobdell	0:f7c60d3e7b8a	505	{
maclobdell	0:f7c60d3e7b8a	506	size_t olen;
maclobdell	0:f7c60d3e7b8a	507	int ret;
maclobdell	0:f7c60d3e7b8a	508	unsigned char *p = output;
maclobdell	0:f7c60d3e7b8a	509	unsigned int hlen;
maclobdell	0:f7c60d3e7b8a	510	const mbedtls_md_info_t *md_info;
maclobdell	0:f7c60d3e7b8a	511	mbedtls_md_context_t md_ctx;
maclobdell	0:f7c60d3e7b8a	512
maclobdell	0:f7c60d3e7b8a	513	if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21 )
maclobdell	0:f7c60d3e7b8a	514	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	515
maclobdell	0:f7c60d3e7b8a	516	if( f_rng == NULL )
maclobdell	0:f7c60d3e7b8a	517	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	518
maclobdell	0:f7c60d3e7b8a	519	md_info = mbedtls_md_info_from_type( (mbedtls_md_type_t) ctx->hash_id );
maclobdell	0:f7c60d3e7b8a	520	if( md_info == NULL )
maclobdell	0:f7c60d3e7b8a	521	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	522
maclobdell	0:f7c60d3e7b8a	523	olen = ctx->len;
maclobdell	0:f7c60d3e7b8a	524	hlen = mbedtls_md_get_size( md_info );
maclobdell	0:f7c60d3e7b8a	525
maclobdell	0:f7c60d3e7b8a	526	if( olen < ilen + 2 * hlen + 2 )
maclobdell	0:f7c60d3e7b8a	527	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	528
maclobdell	0:f7c60d3e7b8a	529	memset( output, 0, olen );
maclobdell	0:f7c60d3e7b8a	530
maclobdell	0:f7c60d3e7b8a	531	*p++ = 0;
maclobdell	0:f7c60d3e7b8a	532
maclobdell	0:f7c60d3e7b8a	533	// Generate a random octet string seed
maclobdell	0:f7c60d3e7b8a	534	//
maclobdell	0:f7c60d3e7b8a	535	if( ( ret = f_rng( p_rng, p, hlen ) ) != 0 )
maclobdell	0:f7c60d3e7b8a	536	return( MBEDTLS_ERR_RSA_RNG_FAILED + ret );
maclobdell	0:f7c60d3e7b8a	537
maclobdell	0:f7c60d3e7b8a	538	p += hlen;
maclobdell	0:f7c60d3e7b8a	539
maclobdell	0:f7c60d3e7b8a	540	// Construct DB
maclobdell	0:f7c60d3e7b8a	541	//
maclobdell	0:f7c60d3e7b8a	542	mbedtls_md( md_info, label, label_len, p );
maclobdell	0:f7c60d3e7b8a	543	p += hlen;
maclobdell	0:f7c60d3e7b8a	544	p += olen - 2 * hlen - 2 - ilen;
maclobdell	0:f7c60d3e7b8a	545	*p++ = 1;
maclobdell	0:f7c60d3e7b8a	546	memcpy( p, input, ilen );
maclobdell	0:f7c60d3e7b8a	547
maclobdell	0:f7c60d3e7b8a	548	mbedtls_md_init( &md_ctx );
maclobdell	0:f7c60d3e7b8a	549	mbedtls_md_setup( &md_ctx, md_info, 0 );
maclobdell	0:f7c60d3e7b8a	550
maclobdell	0:f7c60d3e7b8a	551	// maskedDB: Apply dbMask to DB
maclobdell	0:f7c60d3e7b8a	552	//
maclobdell	0:f7c60d3e7b8a	553	mgf_mask( output + hlen + 1, olen - hlen - 1, output + 1, hlen,
maclobdell	0:f7c60d3e7b8a	554	&md_ctx );
maclobdell	0:f7c60d3e7b8a	555
maclobdell	0:f7c60d3e7b8a	556	// maskedSeed: Apply seedMask to seed
maclobdell	0:f7c60d3e7b8a	557	//
maclobdell	0:f7c60d3e7b8a	558	mgf_mask( output + 1, hlen, output + hlen + 1, olen - hlen - 1,
maclobdell	0:f7c60d3e7b8a	559	&md_ctx );
maclobdell	0:f7c60d3e7b8a	560
maclobdell	0:f7c60d3e7b8a	561	mbedtls_md_free( &md_ctx );
maclobdell	0:f7c60d3e7b8a	562
maclobdell	0:f7c60d3e7b8a	563	return( ( mode == MBEDTLS_RSA_PUBLIC )
maclobdell	0:f7c60d3e7b8a	564	? mbedtls_rsa_public( ctx, output, output )
maclobdell	0:f7c60d3e7b8a	565	: mbedtls_rsa_private( ctx, f_rng, p_rng, output, output ) );
maclobdell	0:f7c60d3e7b8a	566	}
maclobdell	0:f7c60d3e7b8a	567	#endif /* MBEDTLS_PKCS1_V21 */
maclobdell	0:f7c60d3e7b8a	568
maclobdell	0:f7c60d3e7b8a	569	#if defined(MBEDTLS_PKCS1_V15)
maclobdell	0:f7c60d3e7b8a	570	/*
maclobdell	0:f7c60d3e7b8a	571	* Implementation of the PKCS#1 v2.1 RSAES-PKCS1-V1_5-ENCRYPT function
maclobdell	0:f7c60d3e7b8a	572	*/
maclobdell	0:f7c60d3e7b8a	573	int mbedtls_rsa_rsaes_pkcs1_v15_encrypt( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	574	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	575	void *p_rng,
maclobdell	0:f7c60d3e7b8a	576	int mode, size_t ilen,
maclobdell	0:f7c60d3e7b8a	577	const unsigned char *input,
maclobdell	0:f7c60d3e7b8a	578	unsigned char *output )
maclobdell	0:f7c60d3e7b8a	579	{
maclobdell	0:f7c60d3e7b8a	580	size_t nb_pad, olen;
maclobdell	0:f7c60d3e7b8a	581	int ret;
maclobdell	0:f7c60d3e7b8a	582	unsigned char *p = output;
maclobdell	0:f7c60d3e7b8a	583
maclobdell	0:f7c60d3e7b8a	584	if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 )
maclobdell	0:f7c60d3e7b8a	585	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	586
maclobdell	0:f7c60d3e7b8a	587	if( f_rng == NULL )
maclobdell	0:f7c60d3e7b8a	588	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	589
maclobdell	0:f7c60d3e7b8a	590	olen = ctx->len;
maclobdell	0:f7c60d3e7b8a	591
maclobdell	0:f7c60d3e7b8a	592	if( olen < ilen + 11 )
maclobdell	0:f7c60d3e7b8a	593	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	594
maclobdell	0:f7c60d3e7b8a	595	nb_pad = olen - 3 - ilen;
maclobdell	0:f7c60d3e7b8a	596
maclobdell	0:f7c60d3e7b8a	597	*p++ = 0;
maclobdell	0:f7c60d3e7b8a	598	if( mode == MBEDTLS_RSA_PUBLIC )
maclobdell	0:f7c60d3e7b8a	599	{
maclobdell	0:f7c60d3e7b8a	600	*p++ = MBEDTLS_RSA_CRYPT;
maclobdell	0:f7c60d3e7b8a	601
maclobdell	0:f7c60d3e7b8a	602	while( nb_pad-- > 0 )
maclobdell	0:f7c60d3e7b8a	603	{
maclobdell	0:f7c60d3e7b8a	604	int rng_dl = 100;
maclobdell	0:f7c60d3e7b8a	605
maclobdell	0:f7c60d3e7b8a	606	do {
maclobdell	0:f7c60d3e7b8a	607	ret = f_rng( p_rng, p, 1 );
maclobdell	0:f7c60d3e7b8a	608	} while( *p == 0 && --rng_dl && ret == 0 );
maclobdell	0:f7c60d3e7b8a	609
maclobdell	0:f7c60d3e7b8a	610	// Check if RNG failed to generate data
maclobdell	0:f7c60d3e7b8a	611	//
maclobdell	0:f7c60d3e7b8a	612	if( rng_dl == 0 \|\| ret != 0 )
maclobdell	0:f7c60d3e7b8a	613	return( MBEDTLS_ERR_RSA_RNG_FAILED + ret );
maclobdell	0:f7c60d3e7b8a	614
maclobdell	0:f7c60d3e7b8a	615	p++;
maclobdell	0:f7c60d3e7b8a	616	}
maclobdell	0:f7c60d3e7b8a	617	}
maclobdell	0:f7c60d3e7b8a	618	else
maclobdell	0:f7c60d3e7b8a	619	{
maclobdell	0:f7c60d3e7b8a	620	*p++ = MBEDTLS_RSA_SIGN;
maclobdell	0:f7c60d3e7b8a	621
maclobdell	0:f7c60d3e7b8a	622	while( nb_pad-- > 0 )
maclobdell	0:f7c60d3e7b8a	623	*p++ = 0xFF;
maclobdell	0:f7c60d3e7b8a	624	}
maclobdell	0:f7c60d3e7b8a	625
maclobdell	0:f7c60d3e7b8a	626	*p++ = 0;
maclobdell	0:f7c60d3e7b8a	627	memcpy( p, input, ilen );
maclobdell	0:f7c60d3e7b8a	628
maclobdell	0:f7c60d3e7b8a	629	return( ( mode == MBEDTLS_RSA_PUBLIC )
maclobdell	0:f7c60d3e7b8a	630	? mbedtls_rsa_public( ctx, output, output )
maclobdell	0:f7c60d3e7b8a	631	: mbedtls_rsa_private( ctx, f_rng, p_rng, output, output ) );
maclobdell	0:f7c60d3e7b8a	632	}
maclobdell	0:f7c60d3e7b8a	633	#endif /* MBEDTLS_PKCS1_V15 */
maclobdell	0:f7c60d3e7b8a	634
maclobdell	0:f7c60d3e7b8a	635	/*
maclobdell	0:f7c60d3e7b8a	636	* Add the message padding, then do an RSA operation
maclobdell	0:f7c60d3e7b8a	637	*/
maclobdell	0:f7c60d3e7b8a	638	int mbedtls_rsa_pkcs1_encrypt( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	639	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	640	void *p_rng,
maclobdell	0:f7c60d3e7b8a	641	int mode, size_t ilen,
maclobdell	0:f7c60d3e7b8a	642	const unsigned char *input,
maclobdell	0:f7c60d3e7b8a	643	unsigned char *output )
maclobdell	0:f7c60d3e7b8a	644	{
maclobdell	0:f7c60d3e7b8a	645	switch( ctx->padding )
maclobdell	0:f7c60d3e7b8a	646	{
maclobdell	0:f7c60d3e7b8a	647	#if defined(MBEDTLS_PKCS1_V15)
maclobdell	0:f7c60d3e7b8a	648	case MBEDTLS_RSA_PKCS_V15:
maclobdell	0:f7c60d3e7b8a	649	return mbedtls_rsa_rsaes_pkcs1_v15_encrypt( ctx, f_rng, p_rng, mode, ilen,
maclobdell	0:f7c60d3e7b8a	650	input, output );
maclobdell	0:f7c60d3e7b8a	651	#endif
maclobdell	0:f7c60d3e7b8a	652
maclobdell	0:f7c60d3e7b8a	653	#if defined(MBEDTLS_PKCS1_V21)
maclobdell	0:f7c60d3e7b8a	654	case MBEDTLS_RSA_PKCS_V21:
maclobdell	0:f7c60d3e7b8a	655	return mbedtls_rsa_rsaes_oaep_encrypt( ctx, f_rng, p_rng, mode, NULL, 0,
maclobdell	0:f7c60d3e7b8a	656	ilen, input, output );
maclobdell	0:f7c60d3e7b8a	657	#endif
maclobdell	0:f7c60d3e7b8a	658
maclobdell	0:f7c60d3e7b8a	659	default:
maclobdell	0:f7c60d3e7b8a	660	return( MBEDTLS_ERR_RSA_INVALID_PADDING );
maclobdell	0:f7c60d3e7b8a	661	}
maclobdell	0:f7c60d3e7b8a	662	}
maclobdell	0:f7c60d3e7b8a	663
maclobdell	0:f7c60d3e7b8a	664	#if defined(MBEDTLS_PKCS1_V21)
maclobdell	0:f7c60d3e7b8a	665	/*
maclobdell	0:f7c60d3e7b8a	666	* Implementation of the PKCS#1 v2.1 RSAES-OAEP-DECRYPT function
maclobdell	0:f7c60d3e7b8a	667	*/
maclobdell	0:f7c60d3e7b8a	668	int mbedtls_rsa_rsaes_oaep_decrypt( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	669	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	670	void *p_rng,
maclobdell	0:f7c60d3e7b8a	671	int mode,
maclobdell	0:f7c60d3e7b8a	672	const unsigned char *label, size_t label_len,
maclobdell	0:f7c60d3e7b8a	673	size_t *olen,
maclobdell	0:f7c60d3e7b8a	674	const unsigned char *input,
maclobdell	0:f7c60d3e7b8a	675	unsigned char *output,
maclobdell	0:f7c60d3e7b8a	676	size_t output_max_len )
maclobdell	0:f7c60d3e7b8a	677	{
maclobdell	0:f7c60d3e7b8a	678	int ret;
maclobdell	0:f7c60d3e7b8a	679	size_t ilen, i, pad_len;
maclobdell	0:f7c60d3e7b8a	680	unsigned char *p, bad, pad_done;
maclobdell	0:f7c60d3e7b8a	681	unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
maclobdell	0:f7c60d3e7b8a	682	unsigned char lhash[MBEDTLS_MD_MAX_SIZE];
maclobdell	0:f7c60d3e7b8a	683	unsigned int hlen;
maclobdell	0:f7c60d3e7b8a	684	const mbedtls_md_info_t *md_info;
maclobdell	0:f7c60d3e7b8a	685	mbedtls_md_context_t md_ctx;
maclobdell	0:f7c60d3e7b8a	686
maclobdell	0:f7c60d3e7b8a	687	/*
maclobdell	0:f7c60d3e7b8a	688	* Parameters sanity checks
maclobdell	0:f7c60d3e7b8a	689	*/
maclobdell	0:f7c60d3e7b8a	690	if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21 )
maclobdell	0:f7c60d3e7b8a	691	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	692
maclobdell	0:f7c60d3e7b8a	693	ilen = ctx->len;
maclobdell	0:f7c60d3e7b8a	694
maclobdell	0:f7c60d3e7b8a	695	if( ilen < 16 \|\| ilen > sizeof( buf ) )
maclobdell	0:f7c60d3e7b8a	696	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	697
maclobdell	0:f7c60d3e7b8a	698	md_info = mbedtls_md_info_from_type( (mbedtls_md_type_t) ctx->hash_id );
maclobdell	0:f7c60d3e7b8a	699	if( md_info == NULL )
maclobdell	0:f7c60d3e7b8a	700	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	701
maclobdell	0:f7c60d3e7b8a	702	/*
maclobdell	0:f7c60d3e7b8a	703	* RSA operation
maclobdell	0:f7c60d3e7b8a	704	*/
maclobdell	0:f7c60d3e7b8a	705	ret = ( mode == MBEDTLS_RSA_PUBLIC )
maclobdell	0:f7c60d3e7b8a	706	? mbedtls_rsa_public( ctx, input, buf )
maclobdell	0:f7c60d3e7b8a	707	: mbedtls_rsa_private( ctx, f_rng, p_rng, input, buf );
maclobdell	0:f7c60d3e7b8a	708
maclobdell	0:f7c60d3e7b8a	709	if( ret != 0 )
maclobdell	0:f7c60d3e7b8a	710	return( ret );
maclobdell	0:f7c60d3e7b8a	711
maclobdell	0:f7c60d3e7b8a	712	/*
maclobdell	0:f7c60d3e7b8a	713	* Unmask data and generate lHash
maclobdell	0:f7c60d3e7b8a	714	*/
maclobdell	0:f7c60d3e7b8a	715	hlen = mbedtls_md_get_size( md_info );
maclobdell	0:f7c60d3e7b8a	716
maclobdell	0:f7c60d3e7b8a	717	mbedtls_md_init( &md_ctx );
maclobdell	0:f7c60d3e7b8a	718	mbedtls_md_setup( &md_ctx, md_info, 0 );
maclobdell	0:f7c60d3e7b8a	719
maclobdell	0:f7c60d3e7b8a	720	/* Generate lHash */
maclobdell	0:f7c60d3e7b8a	721	mbedtls_md( md_info, label, label_len, lhash );
maclobdell	0:f7c60d3e7b8a	722
maclobdell	0:f7c60d3e7b8a	723	/* seed: Apply seedMask to maskedSeed */
maclobdell	0:f7c60d3e7b8a	724	mgf_mask( buf + 1, hlen, buf + hlen + 1, ilen - hlen - 1,
maclobdell	0:f7c60d3e7b8a	725	&md_ctx );
maclobdell	0:f7c60d3e7b8a	726
maclobdell	0:f7c60d3e7b8a	727	/* DB: Apply dbMask to maskedDB */
maclobdell	0:f7c60d3e7b8a	728	mgf_mask( buf + hlen + 1, ilen - hlen - 1, buf + 1, hlen,
maclobdell	0:f7c60d3e7b8a	729	&md_ctx );
maclobdell	0:f7c60d3e7b8a	730
maclobdell	0:f7c60d3e7b8a	731	mbedtls_md_free( &md_ctx );
maclobdell	0:f7c60d3e7b8a	732
maclobdell	0:f7c60d3e7b8a	733	/*
maclobdell	0:f7c60d3e7b8a	734	* Check contents, in "constant-time"
maclobdell	0:f7c60d3e7b8a	735	*/
maclobdell	0:f7c60d3e7b8a	736	p = buf;
maclobdell	0:f7c60d3e7b8a	737	bad = 0;
maclobdell	0:f7c60d3e7b8a	738
maclobdell	0:f7c60d3e7b8a	739	bad \|= p++; / First byte must be 0 */
maclobdell	0:f7c60d3e7b8a	740
maclobdell	0:f7c60d3e7b8a	741	p += hlen; /* Skip seed */
maclobdell	0:f7c60d3e7b8a	742
maclobdell	0:f7c60d3e7b8a	743	/* Check lHash */
maclobdell	0:f7c60d3e7b8a	744	for( i = 0; i < hlen; i++ )
maclobdell	0:f7c60d3e7b8a	745	bad \|= lhash[i] ^ *p++;
maclobdell	0:f7c60d3e7b8a	746
maclobdell	0:f7c60d3e7b8a	747	/* Get zero-padding len, but always read till end of buffer
maclobdell	0:f7c60d3e7b8a	748	* (minus one, for the 01 byte) */
maclobdell	0:f7c60d3e7b8a	749	pad_len = 0;
maclobdell	0:f7c60d3e7b8a	750	pad_done = 0;
maclobdell	0:f7c60d3e7b8a	751	for( i = 0; i < ilen - 2 * hlen - 2; i++ )
maclobdell	0:f7c60d3e7b8a	752	{
maclobdell	0:f7c60d3e7b8a	753	pad_done \|= p[i];
maclobdell	0:f7c60d3e7b8a	754	pad_len += ((pad_done \| (unsigned char)-pad_done) >> 7) ^ 1;
maclobdell	0:f7c60d3e7b8a	755	}
maclobdell	0:f7c60d3e7b8a	756
maclobdell	0:f7c60d3e7b8a	757	p += pad_len;
maclobdell	0:f7c60d3e7b8a	758	bad \|= *p++ ^ 0x01;
maclobdell	0:f7c60d3e7b8a	759
maclobdell	0:f7c60d3e7b8a	760	/*
maclobdell	0:f7c60d3e7b8a	761	* The only information "leaked" is whether the padding was correct or not
maclobdell	0:f7c60d3e7b8a	762	* (eg, no data is copied if it was not correct). This meets the
maclobdell	0:f7c60d3e7b8a	763	* recommendations in PKCS#1 v2.2: an opponent cannot distinguish between
maclobdell	0:f7c60d3e7b8a	764	* the different error conditions.
maclobdell	0:f7c60d3e7b8a	765	*/
maclobdell	0:f7c60d3e7b8a	766	if( bad != 0 )
maclobdell	0:f7c60d3e7b8a	767	return( MBEDTLS_ERR_RSA_INVALID_PADDING );
maclobdell	0:f7c60d3e7b8a	768
maclobdell	0:f7c60d3e7b8a	769	if( ilen - ( p - buf ) > output_max_len )
maclobdell	0:f7c60d3e7b8a	770	return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
maclobdell	0:f7c60d3e7b8a	771
maclobdell	0:f7c60d3e7b8a	772	*olen = ilen - (p - buf);
maclobdell	0:f7c60d3e7b8a	773	memcpy( output, p, *olen );
maclobdell	0:f7c60d3e7b8a	774
maclobdell	0:f7c60d3e7b8a	775	return( 0 );
maclobdell	0:f7c60d3e7b8a	776	}
maclobdell	0:f7c60d3e7b8a	777	#endif /* MBEDTLS_PKCS1_V21 */
maclobdell	0:f7c60d3e7b8a	778
maclobdell	0:f7c60d3e7b8a	779	#if defined(MBEDTLS_PKCS1_V15)
maclobdell	0:f7c60d3e7b8a	780	/*
maclobdell	0:f7c60d3e7b8a	781	* Implementation of the PKCS#1 v2.1 RSAES-PKCS1-V1_5-DECRYPT function
maclobdell	0:f7c60d3e7b8a	782	*/
maclobdell	0:f7c60d3e7b8a	783	int mbedtls_rsa_rsaes_pkcs1_v15_decrypt( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	784	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	785	void *p_rng,
maclobdell	0:f7c60d3e7b8a	786	int mode, size_t *olen,
maclobdell	0:f7c60d3e7b8a	787	const unsigned char *input,
maclobdell	0:f7c60d3e7b8a	788	unsigned char *output,
maclobdell	0:f7c60d3e7b8a	789	size_t output_max_len)
maclobdell	0:f7c60d3e7b8a	790	{
maclobdell	0:f7c60d3e7b8a	791	int ret;
maclobdell	0:f7c60d3e7b8a	792	size_t ilen, pad_count = 0, i;
maclobdell	0:f7c60d3e7b8a	793	unsigned char *p, bad, pad_done = 0;
maclobdell	0:f7c60d3e7b8a	794	unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
maclobdell	0:f7c60d3e7b8a	795
maclobdell	0:f7c60d3e7b8a	796	if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 )
maclobdell	0:f7c60d3e7b8a	797	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	798
maclobdell	0:f7c60d3e7b8a	799	ilen = ctx->len;
maclobdell	0:f7c60d3e7b8a	800
maclobdell	0:f7c60d3e7b8a	801	if( ilen < 16 \|\| ilen > sizeof( buf ) )
maclobdell	0:f7c60d3e7b8a	802	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	803
maclobdell	0:f7c60d3e7b8a	804	ret = ( mode == MBEDTLS_RSA_PUBLIC )
maclobdell	0:f7c60d3e7b8a	805	? mbedtls_rsa_public( ctx, input, buf )
maclobdell	0:f7c60d3e7b8a	806	: mbedtls_rsa_private( ctx, f_rng, p_rng, input, buf );
maclobdell	0:f7c60d3e7b8a	807
maclobdell	0:f7c60d3e7b8a	808	if( ret != 0 )
maclobdell	0:f7c60d3e7b8a	809	return( ret );
maclobdell	0:f7c60d3e7b8a	810
maclobdell	0:f7c60d3e7b8a	811	p = buf;
maclobdell	0:f7c60d3e7b8a	812	bad = 0;
maclobdell	0:f7c60d3e7b8a	813
maclobdell	0:f7c60d3e7b8a	814	/*
maclobdell	0:f7c60d3e7b8a	815	* Check and get padding len in "constant-time"
maclobdell	0:f7c60d3e7b8a	816	*/
maclobdell	0:f7c60d3e7b8a	817	bad \|= p++; / First byte must be 0 */
maclobdell	0:f7c60d3e7b8a	818
maclobdell	0:f7c60d3e7b8a	819	/* This test does not depend on secret data */
maclobdell	0:f7c60d3e7b8a	820	if( mode == MBEDTLS_RSA_PRIVATE )
maclobdell	0:f7c60d3e7b8a	821	{
maclobdell	0:f7c60d3e7b8a	822	bad \|= *p++ ^ MBEDTLS_RSA_CRYPT;
maclobdell	0:f7c60d3e7b8a	823
maclobdell	0:f7c60d3e7b8a	824	/* Get padding len, but always read till end of buffer
maclobdell	0:f7c60d3e7b8a	825	* (minus one, for the 00 byte) */
maclobdell	0:f7c60d3e7b8a	826	for( i = 0; i < ilen - 3; i++ )
maclobdell	0:f7c60d3e7b8a	827	{
maclobdell	0:f7c60d3e7b8a	828	pad_done \|= ((p[i] \| (unsigned char)-p[i]) >> 7) ^ 1;
maclobdell	0:f7c60d3e7b8a	829	pad_count += ((pad_done \| (unsigned char)-pad_done) >> 7) ^ 1;
maclobdell	0:f7c60d3e7b8a	830	}
maclobdell	0:f7c60d3e7b8a	831
maclobdell	0:f7c60d3e7b8a	832	p += pad_count;
maclobdell	0:f7c60d3e7b8a	833	bad \|= p++; / Must be zero */
maclobdell	0:f7c60d3e7b8a	834	}
maclobdell	0:f7c60d3e7b8a	835	else
maclobdell	0:f7c60d3e7b8a	836	{
maclobdell	0:f7c60d3e7b8a	837	bad \|= *p++ ^ MBEDTLS_RSA_SIGN;
maclobdell	0:f7c60d3e7b8a	838
maclobdell	0:f7c60d3e7b8a	839	/* Get padding len, but always read till end of buffer
maclobdell	0:f7c60d3e7b8a	840	* (minus one, for the 00 byte) */
maclobdell	0:f7c60d3e7b8a	841	for( i = 0; i < ilen - 3; i++ )
maclobdell	0:f7c60d3e7b8a	842	{
maclobdell	0:f7c60d3e7b8a	843	pad_done \|= ( p[i] != 0xFF );
maclobdell	0:f7c60d3e7b8a	844	pad_count += ( pad_done == 0 );
maclobdell	0:f7c60d3e7b8a	845	}
maclobdell	0:f7c60d3e7b8a	846
maclobdell	0:f7c60d3e7b8a	847	p += pad_count;
maclobdell	0:f7c60d3e7b8a	848	bad \|= p++; / Must be zero */
maclobdell	0:f7c60d3e7b8a	849	}
maclobdell	0:f7c60d3e7b8a	850
maclobdell	0:f7c60d3e7b8a	851	if( bad )
maclobdell	0:f7c60d3e7b8a	852	return( MBEDTLS_ERR_RSA_INVALID_PADDING );
maclobdell	0:f7c60d3e7b8a	853
maclobdell	0:f7c60d3e7b8a	854	if( ilen - ( p - buf ) > output_max_len )
maclobdell	0:f7c60d3e7b8a	855	return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
maclobdell	0:f7c60d3e7b8a	856
maclobdell	0:f7c60d3e7b8a	857	*olen = ilen - (p - buf);
maclobdell	0:f7c60d3e7b8a	858	memcpy( output, p, *olen );
maclobdell	0:f7c60d3e7b8a	859
maclobdell	0:f7c60d3e7b8a	860	return( 0 );
maclobdell	0:f7c60d3e7b8a	861	}
maclobdell	0:f7c60d3e7b8a	862	#endif /* MBEDTLS_PKCS1_V15 */
maclobdell	0:f7c60d3e7b8a	863
maclobdell	0:f7c60d3e7b8a	864	/*
maclobdell	0:f7c60d3e7b8a	865	* Do an RSA operation, then remove the message padding
maclobdell	0:f7c60d3e7b8a	866	*/
maclobdell	0:f7c60d3e7b8a	867	int mbedtls_rsa_pkcs1_decrypt( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	868	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	869	void *p_rng,
maclobdell	0:f7c60d3e7b8a	870	int mode, size_t *olen,
maclobdell	0:f7c60d3e7b8a	871	const unsigned char *input,
maclobdell	0:f7c60d3e7b8a	872	unsigned char *output,
maclobdell	0:f7c60d3e7b8a	873	size_t output_max_len)
maclobdell	0:f7c60d3e7b8a	874	{
maclobdell	0:f7c60d3e7b8a	875	switch( ctx->padding )
maclobdell	0:f7c60d3e7b8a	876	{
maclobdell	0:f7c60d3e7b8a	877	#if defined(MBEDTLS_PKCS1_V15)
maclobdell	0:f7c60d3e7b8a	878	case MBEDTLS_RSA_PKCS_V15:
maclobdell	0:f7c60d3e7b8a	879	return mbedtls_rsa_rsaes_pkcs1_v15_decrypt( ctx, f_rng, p_rng, mode, olen,
maclobdell	0:f7c60d3e7b8a	880	input, output, output_max_len );
maclobdell	0:f7c60d3e7b8a	881	#endif
maclobdell	0:f7c60d3e7b8a	882
maclobdell	0:f7c60d3e7b8a	883	#if defined(MBEDTLS_PKCS1_V21)
maclobdell	0:f7c60d3e7b8a	884	case MBEDTLS_RSA_PKCS_V21:
maclobdell	0:f7c60d3e7b8a	885	return mbedtls_rsa_rsaes_oaep_decrypt( ctx, f_rng, p_rng, mode, NULL, 0,
maclobdell	0:f7c60d3e7b8a	886	olen, input, output,
maclobdell	0:f7c60d3e7b8a	887	output_max_len );
maclobdell	0:f7c60d3e7b8a	888	#endif
maclobdell	0:f7c60d3e7b8a	889
maclobdell	0:f7c60d3e7b8a	890	default:
maclobdell	0:f7c60d3e7b8a	891	return( MBEDTLS_ERR_RSA_INVALID_PADDING );
maclobdell	0:f7c60d3e7b8a	892	}
maclobdell	0:f7c60d3e7b8a	893	}
maclobdell	0:f7c60d3e7b8a	894
maclobdell	0:f7c60d3e7b8a	895	#if defined(MBEDTLS_PKCS1_V21)
maclobdell	0:f7c60d3e7b8a	896	/*
maclobdell	0:f7c60d3e7b8a	897	* Implementation of the PKCS#1 v2.1 RSASSA-PSS-SIGN function
maclobdell	0:f7c60d3e7b8a	898	*/
maclobdell	0:f7c60d3e7b8a	899	int mbedtls_rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	900	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	901	void *p_rng,
maclobdell	0:f7c60d3e7b8a	902	int mode,
maclobdell	0:f7c60d3e7b8a	903	mbedtls_md_type_t md_alg,
maclobdell	0:f7c60d3e7b8a	904	unsigned int hashlen,
maclobdell	0:f7c60d3e7b8a	905	const unsigned char *hash,
maclobdell	0:f7c60d3e7b8a	906	unsigned char *sig )
maclobdell	0:f7c60d3e7b8a	907	{
maclobdell	0:f7c60d3e7b8a	908	size_t olen;
maclobdell	0:f7c60d3e7b8a	909	unsigned char *p = sig;
maclobdell	0:f7c60d3e7b8a	910	unsigned char salt[MBEDTLS_MD_MAX_SIZE];
maclobdell	0:f7c60d3e7b8a	911	unsigned int slen, hlen, offset = 0;
maclobdell	0:f7c60d3e7b8a	912	int ret;
maclobdell	0:f7c60d3e7b8a	913	size_t msb;
maclobdell	0:f7c60d3e7b8a	914	const mbedtls_md_info_t *md_info;
maclobdell	0:f7c60d3e7b8a	915	mbedtls_md_context_t md_ctx;
maclobdell	0:f7c60d3e7b8a	916
maclobdell	0:f7c60d3e7b8a	917	if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21 )
maclobdell	0:f7c60d3e7b8a	918	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	919
maclobdell	0:f7c60d3e7b8a	920	if( f_rng == NULL )
maclobdell	0:f7c60d3e7b8a	921	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	922
maclobdell	0:f7c60d3e7b8a	923	olen = ctx->len;
maclobdell	0:f7c60d3e7b8a	924
maclobdell	0:f7c60d3e7b8a	925	if( md_alg != MBEDTLS_MD_NONE )
maclobdell	0:f7c60d3e7b8a	926	{
maclobdell	0:f7c60d3e7b8a	927	// Gather length of hash to sign
maclobdell	0:f7c60d3e7b8a	928	//
maclobdell	0:f7c60d3e7b8a	929	md_info = mbedtls_md_info_from_type( md_alg );
maclobdell	0:f7c60d3e7b8a	930	if( md_info == NULL )
maclobdell	0:f7c60d3e7b8a	931	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	932
maclobdell	0:f7c60d3e7b8a	933	hashlen = mbedtls_md_get_size( md_info );
maclobdell	0:f7c60d3e7b8a	934	}
maclobdell	0:f7c60d3e7b8a	935
maclobdell	0:f7c60d3e7b8a	936	md_info = mbedtls_md_info_from_type( (mbedtls_md_type_t) ctx->hash_id );
maclobdell	0:f7c60d3e7b8a	937	if( md_info == NULL )
maclobdell	0:f7c60d3e7b8a	938	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	939
maclobdell	0:f7c60d3e7b8a	940	hlen = mbedtls_md_get_size( md_info );
maclobdell	0:f7c60d3e7b8a	941	slen = hlen;
maclobdell	0:f7c60d3e7b8a	942
maclobdell	0:f7c60d3e7b8a	943	if( olen < hlen + slen + 2 )
maclobdell	0:f7c60d3e7b8a	944	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	945
maclobdell	0:f7c60d3e7b8a	946	memset( sig, 0, olen );
maclobdell	0:f7c60d3e7b8a	947
maclobdell	0:f7c60d3e7b8a	948	// Generate salt of length slen
maclobdell	0:f7c60d3e7b8a	949	//
maclobdell	0:f7c60d3e7b8a	950	if( ( ret = f_rng( p_rng, salt, slen ) ) != 0 )
maclobdell	0:f7c60d3e7b8a	951	return( MBEDTLS_ERR_RSA_RNG_FAILED + ret );
maclobdell	0:f7c60d3e7b8a	952
maclobdell	0:f7c60d3e7b8a	953	// Note: EMSA-PSS encoding is over the length of N - 1 bits
maclobdell	0:f7c60d3e7b8a	954	//
maclobdell	0:f7c60d3e7b8a	955	msb = mbedtls_mpi_bitlen( &ctx->N ) - 1;
maclobdell	0:f7c60d3e7b8a	956	p += olen - hlen * 2 - 2;
maclobdell	0:f7c60d3e7b8a	957	*p++ = 0x01;
maclobdell	0:f7c60d3e7b8a	958	memcpy( p, salt, slen );
maclobdell	0:f7c60d3e7b8a	959	p += slen;
maclobdell	0:f7c60d3e7b8a	960
maclobdell	0:f7c60d3e7b8a	961	mbedtls_md_init( &md_ctx );
maclobdell	0:f7c60d3e7b8a	962	mbedtls_md_setup( &md_ctx, md_info, 0 );
maclobdell	0:f7c60d3e7b8a	963
maclobdell	0:f7c60d3e7b8a	964	// Generate H = Hash( M' )
maclobdell	0:f7c60d3e7b8a	965	//
maclobdell	0:f7c60d3e7b8a	966	mbedtls_md_starts( &md_ctx );
maclobdell	0:f7c60d3e7b8a	967	mbedtls_md_update( &md_ctx, p, 8 );
maclobdell	0:f7c60d3e7b8a	968	mbedtls_md_update( &md_ctx, hash, hashlen );
maclobdell	0:f7c60d3e7b8a	969	mbedtls_md_update( &md_ctx, salt, slen );
maclobdell	0:f7c60d3e7b8a	970	mbedtls_md_finish( &md_ctx, p );
maclobdell	0:f7c60d3e7b8a	971
maclobdell	0:f7c60d3e7b8a	972	// Compensate for boundary condition when applying mask
maclobdell	0:f7c60d3e7b8a	973	//
maclobdell	0:f7c60d3e7b8a	974	if( msb % 8 == 0 )
maclobdell	0:f7c60d3e7b8a	975	offset = 1;
maclobdell	0:f7c60d3e7b8a	976
maclobdell	0:f7c60d3e7b8a	977	// maskedDB: Apply dbMask to DB
maclobdell	0:f7c60d3e7b8a	978	//
maclobdell	0:f7c60d3e7b8a	979	mgf_mask( sig + offset, olen - hlen - 1 - offset, p, hlen, &md_ctx );
maclobdell	0:f7c60d3e7b8a	980
maclobdell	0:f7c60d3e7b8a	981	mbedtls_md_free( &md_ctx );
maclobdell	0:f7c60d3e7b8a	982
maclobdell	0:f7c60d3e7b8a	983	msb = mbedtls_mpi_bitlen( &ctx->N ) - 1;
maclobdell	0:f7c60d3e7b8a	984	sig[0] &= 0xFF >> ( olen * 8 - msb );
maclobdell	0:f7c60d3e7b8a	985
maclobdell	0:f7c60d3e7b8a	986	p += hlen;
maclobdell	0:f7c60d3e7b8a	987	*p++ = 0xBC;
maclobdell	0:f7c60d3e7b8a	988
maclobdell	0:f7c60d3e7b8a	989	return( ( mode == MBEDTLS_RSA_PUBLIC )
maclobdell	0:f7c60d3e7b8a	990	? mbedtls_rsa_public( ctx, sig, sig )
maclobdell	0:f7c60d3e7b8a	991	: mbedtls_rsa_private( ctx, f_rng, p_rng, sig, sig ) );
maclobdell	0:f7c60d3e7b8a	992	}
maclobdell	0:f7c60d3e7b8a	993	#endif /* MBEDTLS_PKCS1_V21 */
maclobdell	0:f7c60d3e7b8a	994
maclobdell	0:f7c60d3e7b8a	995	#if defined(MBEDTLS_PKCS1_V15)
maclobdell	0:f7c60d3e7b8a	996	/*
maclobdell	0:f7c60d3e7b8a	997	* Implementation of the PKCS#1 v2.1 RSASSA-PKCS1-V1_5-SIGN function
maclobdell	0:f7c60d3e7b8a	998	*/
maclobdell	0:f7c60d3e7b8a	999	/*
maclobdell	0:f7c60d3e7b8a	1000	* Do an RSA operation to sign the message digest
maclobdell	0:f7c60d3e7b8a	1001	*/
maclobdell	0:f7c60d3e7b8a	1002	int mbedtls_rsa_rsassa_pkcs1_v15_sign( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	1003	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	1004	void *p_rng,
maclobdell	0:f7c60d3e7b8a	1005	int mode,
maclobdell	0:f7c60d3e7b8a	1006	mbedtls_md_type_t md_alg,
maclobdell	0:f7c60d3e7b8a	1007	unsigned int hashlen,
maclobdell	0:f7c60d3e7b8a	1008	const unsigned char *hash,
maclobdell	0:f7c60d3e7b8a	1009	unsigned char *sig )
maclobdell	0:f7c60d3e7b8a	1010	{
maclobdell	0:f7c60d3e7b8a	1011	size_t nb_pad, olen, oid_size = 0;
maclobdell	0:f7c60d3e7b8a	1012	unsigned char *p = sig;
maclobdell	0:f7c60d3e7b8a	1013	const char *oid = NULL;
maclobdell	0:f7c60d3e7b8a	1014	unsigned char sig_try = NULL, verif = NULL;
maclobdell	0:f7c60d3e7b8a	1015	size_t i;
maclobdell	0:f7c60d3e7b8a	1016	unsigned char diff;
maclobdell	0:f7c60d3e7b8a	1017	volatile unsigned char diff_no_optimize;
maclobdell	0:f7c60d3e7b8a	1018	int ret;
maclobdell	0:f7c60d3e7b8a	1019
maclobdell	0:f7c60d3e7b8a	1020	if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 )
maclobdell	0:f7c60d3e7b8a	1021	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	1022
maclobdell	0:f7c60d3e7b8a	1023	olen = ctx->len;
maclobdell	0:f7c60d3e7b8a	1024	nb_pad = olen - 3;
maclobdell	0:f7c60d3e7b8a	1025
maclobdell	0:f7c60d3e7b8a	1026	if( md_alg != MBEDTLS_MD_NONE )
maclobdell	0:f7c60d3e7b8a	1027	{
maclobdell	0:f7c60d3e7b8a	1028	const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type( md_alg );
maclobdell	0:f7c60d3e7b8a	1029	if( md_info == NULL )
maclobdell	0:f7c60d3e7b8a	1030	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	1031
maclobdell	0:f7c60d3e7b8a	1032	if( mbedtls_oid_get_oid_by_md( md_alg, &oid, &oid_size ) != 0 )
maclobdell	0:f7c60d3e7b8a	1033	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	1034
maclobdell	0:f7c60d3e7b8a	1035	nb_pad -= 10 + oid_size;
maclobdell	0:f7c60d3e7b8a	1036
maclobdell	0:f7c60d3e7b8a	1037	hashlen = mbedtls_md_get_size( md_info );
maclobdell	0:f7c60d3e7b8a	1038	}
maclobdell	0:f7c60d3e7b8a	1039
maclobdell	0:f7c60d3e7b8a	1040	nb_pad -= hashlen;
maclobdell	0:f7c60d3e7b8a	1041
maclobdell	0:f7c60d3e7b8a	1042	if( ( nb_pad < 8 ) \|\| ( nb_pad > olen ) )
maclobdell	0:f7c60d3e7b8a	1043	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	1044
maclobdell	0:f7c60d3e7b8a	1045	*p++ = 0;
maclobdell	0:f7c60d3e7b8a	1046	*p++ = MBEDTLS_RSA_SIGN;
maclobdell	0:f7c60d3e7b8a	1047	memset( p, 0xFF, nb_pad );
maclobdell	0:f7c60d3e7b8a	1048	p += nb_pad;
maclobdell	0:f7c60d3e7b8a	1049	*p++ = 0;
maclobdell	0:f7c60d3e7b8a	1050
maclobdell	0:f7c60d3e7b8a	1051	if( md_alg == MBEDTLS_MD_NONE )
maclobdell	0:f7c60d3e7b8a	1052	{
maclobdell	0:f7c60d3e7b8a	1053	memcpy( p, hash, hashlen );
maclobdell	0:f7c60d3e7b8a	1054	}
maclobdell	0:f7c60d3e7b8a	1055	else
maclobdell	0:f7c60d3e7b8a	1056	{
maclobdell	0:f7c60d3e7b8a	1057	/*
maclobdell	0:f7c60d3e7b8a	1058	* DigestInfo ::= SEQUENCE {
maclobdell	0:f7c60d3e7b8a	1059	* digestAlgorithm DigestAlgorithmIdentifier,
maclobdell	0:f7c60d3e7b8a	1060	* digest Digest }
maclobdell	0:f7c60d3e7b8a	1061	*
maclobdell	0:f7c60d3e7b8a	1062	* DigestAlgorithmIdentifier ::= AlgorithmIdentifier
maclobdell	0:f7c60d3e7b8a	1063	*
maclobdell	0:f7c60d3e7b8a	1064	* Digest ::= OCTET STRING
maclobdell	0:f7c60d3e7b8a	1065	*/
maclobdell	0:f7c60d3e7b8a	1066	*p++ = MBEDTLS_ASN1_SEQUENCE \| MBEDTLS_ASN1_CONSTRUCTED;
maclobdell	0:f7c60d3e7b8a	1067	*p++ = (unsigned char) ( 0x08 + oid_size + hashlen );
maclobdell	0:f7c60d3e7b8a	1068	*p++ = MBEDTLS_ASN1_SEQUENCE \| MBEDTLS_ASN1_CONSTRUCTED;
maclobdell	0:f7c60d3e7b8a	1069	*p++ = (unsigned char) ( 0x04 + oid_size );
maclobdell	0:f7c60d3e7b8a	1070	*p++ = MBEDTLS_ASN1_OID;
maclobdell	0:f7c60d3e7b8a	1071	*p++ = oid_size & 0xFF;
maclobdell	0:f7c60d3e7b8a	1072	memcpy( p, oid, oid_size );
maclobdell	0:f7c60d3e7b8a	1073	p += oid_size;
maclobdell	0:f7c60d3e7b8a	1074	*p++ = MBEDTLS_ASN1_NULL;
maclobdell	0:f7c60d3e7b8a	1075	*p++ = 0x00;
maclobdell	0:f7c60d3e7b8a	1076	*p++ = MBEDTLS_ASN1_OCTET_STRING;
maclobdell	0:f7c60d3e7b8a	1077	*p++ = hashlen;
maclobdell	0:f7c60d3e7b8a	1078	memcpy( p, hash, hashlen );
maclobdell	0:f7c60d3e7b8a	1079	}
maclobdell	0:f7c60d3e7b8a	1080
maclobdell	0:f7c60d3e7b8a	1081	if( mode == MBEDTLS_RSA_PUBLIC )
maclobdell	0:f7c60d3e7b8a	1082	return( mbedtls_rsa_public( ctx, sig, sig ) );
maclobdell	0:f7c60d3e7b8a	1083
maclobdell	0:f7c60d3e7b8a	1084	/*
maclobdell	0:f7c60d3e7b8a	1085	* In order to prevent Lenstra's attack, make the signature in a
maclobdell	0:f7c60d3e7b8a	1086	* temporary buffer and check it before returning it.
maclobdell	0:f7c60d3e7b8a	1087	*/
maclobdell	0:f7c60d3e7b8a	1088	sig_try = mbedtls_calloc( 1, ctx->len );
maclobdell	0:f7c60d3e7b8a	1089	verif = mbedtls_calloc( 1, ctx->len );
maclobdell	0:f7c60d3e7b8a	1090	if( sig_try == NULL \|\| verif == NULL )
maclobdell	0:f7c60d3e7b8a	1091	return( MBEDTLS_ERR_MPI_ALLOC_FAILED );
maclobdell	0:f7c60d3e7b8a	1092
maclobdell	0:f7c60d3e7b8a	1093	MBEDTLS_MPI_CHK( mbedtls_rsa_private( ctx, f_rng, p_rng, sig, sig_try ) );
maclobdell	0:f7c60d3e7b8a	1094	MBEDTLS_MPI_CHK( mbedtls_rsa_public( ctx, sig_try, verif ) );
maclobdell	0:f7c60d3e7b8a	1095
maclobdell	0:f7c60d3e7b8a	1096	/* Compare in constant time just in case */
maclobdell	0:f7c60d3e7b8a	1097	for( diff = 0, i = 0; i < ctx->len; i++ )
maclobdell	0:f7c60d3e7b8a	1098	diff \|= verif[i] ^ sig[i];
maclobdell	0:f7c60d3e7b8a	1099	diff_no_optimize = diff;
maclobdell	0:f7c60d3e7b8a	1100
maclobdell	0:f7c60d3e7b8a	1101	if( diff_no_optimize != 0 )
maclobdell	0:f7c60d3e7b8a	1102	{
maclobdell	0:f7c60d3e7b8a	1103	ret = MBEDTLS_ERR_RSA_PRIVATE_FAILED;
maclobdell	0:f7c60d3e7b8a	1104	goto cleanup;
maclobdell	0:f7c60d3e7b8a	1105	}
maclobdell	0:f7c60d3e7b8a	1106
maclobdell	0:f7c60d3e7b8a	1107	memcpy( sig, sig_try, ctx->len );
maclobdell	0:f7c60d3e7b8a	1108
maclobdell	0:f7c60d3e7b8a	1109	cleanup:
maclobdell	0:f7c60d3e7b8a	1110	mbedtls_free( sig_try );
maclobdell	0:f7c60d3e7b8a	1111	mbedtls_free( verif );
maclobdell	0:f7c60d3e7b8a	1112
maclobdell	0:f7c60d3e7b8a	1113	return( ret );
maclobdell	0:f7c60d3e7b8a	1114	}
maclobdell	0:f7c60d3e7b8a	1115	#endif /* MBEDTLS_PKCS1_V15 */
maclobdell	0:f7c60d3e7b8a	1116
maclobdell	0:f7c60d3e7b8a	1117	/*
maclobdell	0:f7c60d3e7b8a	1118	* Do an RSA operation to sign the message digest
maclobdell	0:f7c60d3e7b8a	1119	*/
maclobdell	0:f7c60d3e7b8a	1120	int mbedtls_rsa_pkcs1_sign( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	1121	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	1122	void *p_rng,
maclobdell	0:f7c60d3e7b8a	1123	int mode,
maclobdell	0:f7c60d3e7b8a	1124	mbedtls_md_type_t md_alg,
maclobdell	0:f7c60d3e7b8a	1125	unsigned int hashlen,
maclobdell	0:f7c60d3e7b8a	1126	const unsigned char *hash,
maclobdell	0:f7c60d3e7b8a	1127	unsigned char *sig )
maclobdell	0:f7c60d3e7b8a	1128	{
maclobdell	0:f7c60d3e7b8a	1129	switch( ctx->padding )
maclobdell	0:f7c60d3e7b8a	1130	{
maclobdell	0:f7c60d3e7b8a	1131	#if defined(MBEDTLS_PKCS1_V15)
maclobdell	0:f7c60d3e7b8a	1132	case MBEDTLS_RSA_PKCS_V15:
maclobdell	0:f7c60d3e7b8a	1133	return mbedtls_rsa_rsassa_pkcs1_v15_sign( ctx, f_rng, p_rng, mode, md_alg,
maclobdell	0:f7c60d3e7b8a	1134	hashlen, hash, sig );
maclobdell	0:f7c60d3e7b8a	1135	#endif
maclobdell	0:f7c60d3e7b8a	1136
maclobdell	0:f7c60d3e7b8a	1137	#if defined(MBEDTLS_PKCS1_V21)
maclobdell	0:f7c60d3e7b8a	1138	case MBEDTLS_RSA_PKCS_V21:
maclobdell	0:f7c60d3e7b8a	1139	return mbedtls_rsa_rsassa_pss_sign( ctx, f_rng, p_rng, mode, md_alg,
maclobdell	0:f7c60d3e7b8a	1140	hashlen, hash, sig );
maclobdell	0:f7c60d3e7b8a	1141	#endif
maclobdell	0:f7c60d3e7b8a	1142
maclobdell	0:f7c60d3e7b8a	1143	default:
maclobdell	0:f7c60d3e7b8a	1144	return( MBEDTLS_ERR_RSA_INVALID_PADDING );
maclobdell	0:f7c60d3e7b8a	1145	}
maclobdell	0:f7c60d3e7b8a	1146	}
maclobdell	0:f7c60d3e7b8a	1147
maclobdell	0:f7c60d3e7b8a	1148	#if defined(MBEDTLS_PKCS1_V21)
maclobdell	0:f7c60d3e7b8a	1149	/*
maclobdell	0:f7c60d3e7b8a	1150	* Implementation of the PKCS#1 v2.1 RSASSA-PSS-VERIFY function
maclobdell	0:f7c60d3e7b8a	1151	*/
maclobdell	0:f7c60d3e7b8a	1152	int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	1153	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	1154	void *p_rng,
maclobdell	0:f7c60d3e7b8a	1155	int mode,
maclobdell	0:f7c60d3e7b8a	1156	mbedtls_md_type_t md_alg,
maclobdell	0:f7c60d3e7b8a	1157	unsigned int hashlen,
maclobdell	0:f7c60d3e7b8a	1158	const unsigned char *hash,
maclobdell	0:f7c60d3e7b8a	1159	mbedtls_md_type_t mgf1_hash_id,
maclobdell	0:f7c60d3e7b8a	1160	int expected_salt_len,
maclobdell	0:f7c60d3e7b8a	1161	const unsigned char *sig )
maclobdell	0:f7c60d3e7b8a	1162	{
maclobdell	0:f7c60d3e7b8a	1163	int ret;
maclobdell	0:f7c60d3e7b8a	1164	size_t siglen;
maclobdell	0:f7c60d3e7b8a	1165	unsigned char *p;
maclobdell	0:f7c60d3e7b8a	1166	unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
maclobdell	0:f7c60d3e7b8a	1167	unsigned char result[MBEDTLS_MD_MAX_SIZE];
maclobdell	0:f7c60d3e7b8a	1168	unsigned char zeros[8];
maclobdell	0:f7c60d3e7b8a	1169	unsigned int hlen;
maclobdell	0:f7c60d3e7b8a	1170	size_t slen, msb;
maclobdell	0:f7c60d3e7b8a	1171	const mbedtls_md_info_t *md_info;
maclobdell	0:f7c60d3e7b8a	1172	mbedtls_md_context_t md_ctx;
maclobdell	0:f7c60d3e7b8a	1173
maclobdell	0:f7c60d3e7b8a	1174	if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V21 )
maclobdell	0:f7c60d3e7b8a	1175	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	1176
maclobdell	0:f7c60d3e7b8a	1177	siglen = ctx->len;
maclobdell	0:f7c60d3e7b8a	1178
maclobdell	0:f7c60d3e7b8a	1179	if( siglen < 16 \|\| siglen > sizeof( buf ) )
maclobdell	0:f7c60d3e7b8a	1180	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	1181
maclobdell	0:f7c60d3e7b8a	1182	ret = ( mode == MBEDTLS_RSA_PUBLIC )
maclobdell	0:f7c60d3e7b8a	1183	? mbedtls_rsa_public( ctx, sig, buf )
maclobdell	0:f7c60d3e7b8a	1184	: mbedtls_rsa_private( ctx, f_rng, p_rng, sig, buf );
maclobdell	0:f7c60d3e7b8a	1185
maclobdell	0:f7c60d3e7b8a	1186	if( ret != 0 )
maclobdell	0:f7c60d3e7b8a	1187	return( ret );
maclobdell	0:f7c60d3e7b8a	1188
maclobdell	0:f7c60d3e7b8a	1189	p = buf;
maclobdell	0:f7c60d3e7b8a	1190
maclobdell	0:f7c60d3e7b8a	1191	if( buf[siglen - 1] != 0xBC )
maclobdell	0:f7c60d3e7b8a	1192	return( MBEDTLS_ERR_RSA_INVALID_PADDING );
maclobdell	0:f7c60d3e7b8a	1193
maclobdell	0:f7c60d3e7b8a	1194	if( md_alg != MBEDTLS_MD_NONE )
maclobdell	0:f7c60d3e7b8a	1195	{
maclobdell	0:f7c60d3e7b8a	1196	// Gather length of hash to sign
maclobdell	0:f7c60d3e7b8a	1197	//
maclobdell	0:f7c60d3e7b8a	1198	md_info = mbedtls_md_info_from_type( md_alg );
maclobdell	0:f7c60d3e7b8a	1199	if( md_info == NULL )
maclobdell	0:f7c60d3e7b8a	1200	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	1201
maclobdell	0:f7c60d3e7b8a	1202	hashlen = mbedtls_md_get_size( md_info );
maclobdell	0:f7c60d3e7b8a	1203	}
maclobdell	0:f7c60d3e7b8a	1204
maclobdell	0:f7c60d3e7b8a	1205	md_info = mbedtls_md_info_from_type( mgf1_hash_id );
maclobdell	0:f7c60d3e7b8a	1206	if( md_info == NULL )
maclobdell	0:f7c60d3e7b8a	1207	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	1208
maclobdell	0:f7c60d3e7b8a	1209	hlen = mbedtls_md_get_size( md_info );
maclobdell	0:f7c60d3e7b8a	1210	slen = siglen - hlen - 1; /* Currently length of salt + padding */
maclobdell	0:f7c60d3e7b8a	1211
maclobdell	0:f7c60d3e7b8a	1212	memset( zeros, 0, 8 );
maclobdell	0:f7c60d3e7b8a	1213
maclobdell	0:f7c60d3e7b8a	1214	// Note: EMSA-PSS verification is over the length of N - 1 bits
maclobdell	0:f7c60d3e7b8a	1215	//
maclobdell	0:f7c60d3e7b8a	1216	msb = mbedtls_mpi_bitlen( &ctx->N ) - 1;
maclobdell	0:f7c60d3e7b8a	1217
maclobdell	0:f7c60d3e7b8a	1218	// Compensate for boundary condition when applying mask
maclobdell	0:f7c60d3e7b8a	1219	//
maclobdell	0:f7c60d3e7b8a	1220	if( msb % 8 == 0 )
maclobdell	0:f7c60d3e7b8a	1221	{
maclobdell	0:f7c60d3e7b8a	1222	p++;
maclobdell	0:f7c60d3e7b8a	1223	siglen -= 1;
maclobdell	0:f7c60d3e7b8a	1224	}
maclobdell	0:f7c60d3e7b8a	1225	if( buf[0] >> ( 8 - siglen * 8 + msb ) )
maclobdell	0:f7c60d3e7b8a	1226	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	1227
maclobdell	0:f7c60d3e7b8a	1228	mbedtls_md_init( &md_ctx );
maclobdell	0:f7c60d3e7b8a	1229	mbedtls_md_setup( &md_ctx, md_info, 0 );
maclobdell	0:f7c60d3e7b8a	1230
maclobdell	0:f7c60d3e7b8a	1231	mgf_mask( p, siglen - hlen - 1, p + siglen - hlen - 1, hlen, &md_ctx );
maclobdell	0:f7c60d3e7b8a	1232
maclobdell	0:f7c60d3e7b8a	1233	buf[0] &= 0xFF >> ( siglen * 8 - msb );
maclobdell	0:f7c60d3e7b8a	1234
maclobdell	0:f7c60d3e7b8a	1235	while( p < buf + siglen && *p == 0 )
maclobdell	0:f7c60d3e7b8a	1236	p++;
maclobdell	0:f7c60d3e7b8a	1237
maclobdell	0:f7c60d3e7b8a	1238	if( p == buf + siglen \|\|
maclobdell	0:f7c60d3e7b8a	1239	*p++ != 0x01 )
maclobdell	0:f7c60d3e7b8a	1240	{
maclobdell	0:f7c60d3e7b8a	1241	mbedtls_md_free( &md_ctx );
maclobdell	0:f7c60d3e7b8a	1242	return( MBEDTLS_ERR_RSA_INVALID_PADDING );
maclobdell	0:f7c60d3e7b8a	1243	}
maclobdell	0:f7c60d3e7b8a	1244
maclobdell	0:f7c60d3e7b8a	1245	/* Actual salt len */
maclobdell	0:f7c60d3e7b8a	1246	slen -= p - buf;
maclobdell	0:f7c60d3e7b8a	1247
maclobdell	0:f7c60d3e7b8a	1248	if( expected_salt_len != MBEDTLS_RSA_SALT_LEN_ANY &&
maclobdell	0:f7c60d3e7b8a	1249	slen != (size_t) expected_salt_len )
maclobdell	0:f7c60d3e7b8a	1250	{
maclobdell	0:f7c60d3e7b8a	1251	mbedtls_md_free( &md_ctx );
maclobdell	0:f7c60d3e7b8a	1252	return( MBEDTLS_ERR_RSA_INVALID_PADDING );
maclobdell	0:f7c60d3e7b8a	1253	}
maclobdell	0:f7c60d3e7b8a	1254
maclobdell	0:f7c60d3e7b8a	1255	// Generate H = Hash( M' )
maclobdell	0:f7c60d3e7b8a	1256	//
maclobdell	0:f7c60d3e7b8a	1257	mbedtls_md_starts( &md_ctx );
maclobdell	0:f7c60d3e7b8a	1258	mbedtls_md_update( &md_ctx, zeros, 8 );
maclobdell	0:f7c60d3e7b8a	1259	mbedtls_md_update( &md_ctx, hash, hashlen );
maclobdell	0:f7c60d3e7b8a	1260	mbedtls_md_update( &md_ctx, p, slen );
maclobdell	0:f7c60d3e7b8a	1261	mbedtls_md_finish( &md_ctx, result );
maclobdell	0:f7c60d3e7b8a	1262
maclobdell	0:f7c60d3e7b8a	1263	mbedtls_md_free( &md_ctx );
maclobdell	0:f7c60d3e7b8a	1264
maclobdell	0:f7c60d3e7b8a	1265	if( memcmp( p + slen, result, hlen ) == 0 )
maclobdell	0:f7c60d3e7b8a	1266	return( 0 );
maclobdell	0:f7c60d3e7b8a	1267	else
maclobdell	0:f7c60d3e7b8a	1268	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1269	}
maclobdell	0:f7c60d3e7b8a	1270
maclobdell	0:f7c60d3e7b8a	1271	/*
maclobdell	0:f7c60d3e7b8a	1272	* Simplified PKCS#1 v2.1 RSASSA-PSS-VERIFY function
maclobdell	0:f7c60d3e7b8a	1273	*/
maclobdell	0:f7c60d3e7b8a	1274	int mbedtls_rsa_rsassa_pss_verify( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	1275	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	1276	void *p_rng,
maclobdell	0:f7c60d3e7b8a	1277	int mode,
maclobdell	0:f7c60d3e7b8a	1278	mbedtls_md_type_t md_alg,
maclobdell	0:f7c60d3e7b8a	1279	unsigned int hashlen,
maclobdell	0:f7c60d3e7b8a	1280	const unsigned char *hash,
maclobdell	0:f7c60d3e7b8a	1281	const unsigned char *sig )
maclobdell	0:f7c60d3e7b8a	1282	{
maclobdell	0:f7c60d3e7b8a	1283	mbedtls_md_type_t mgf1_hash_id = ( ctx->hash_id != MBEDTLS_MD_NONE )
maclobdell	0:f7c60d3e7b8a	1284	? (mbedtls_md_type_t) ctx->hash_id
maclobdell	0:f7c60d3e7b8a	1285	: md_alg;
maclobdell	0:f7c60d3e7b8a	1286
maclobdell	0:f7c60d3e7b8a	1287	return( mbedtls_rsa_rsassa_pss_verify_ext( ctx, f_rng, p_rng, mode,
maclobdell	0:f7c60d3e7b8a	1288	md_alg, hashlen, hash,
maclobdell	0:f7c60d3e7b8a	1289	mgf1_hash_id, MBEDTLS_RSA_SALT_LEN_ANY,
maclobdell	0:f7c60d3e7b8a	1290	sig ) );
maclobdell	0:f7c60d3e7b8a	1291
maclobdell	0:f7c60d3e7b8a	1292	}
maclobdell	0:f7c60d3e7b8a	1293	#endif /* MBEDTLS_PKCS1_V21 */
maclobdell	0:f7c60d3e7b8a	1294
maclobdell	0:f7c60d3e7b8a	1295	#if defined(MBEDTLS_PKCS1_V15)
maclobdell	0:f7c60d3e7b8a	1296	/*
maclobdell	0:f7c60d3e7b8a	1297	* Implementation of the PKCS#1 v2.1 RSASSA-PKCS1-v1_5-VERIFY function
maclobdell	0:f7c60d3e7b8a	1298	*/
maclobdell	0:f7c60d3e7b8a	1299	int mbedtls_rsa_rsassa_pkcs1_v15_verify( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	1300	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	1301	void *p_rng,
maclobdell	0:f7c60d3e7b8a	1302	int mode,
maclobdell	0:f7c60d3e7b8a	1303	mbedtls_md_type_t md_alg,
maclobdell	0:f7c60d3e7b8a	1304	unsigned int hashlen,
maclobdell	0:f7c60d3e7b8a	1305	const unsigned char *hash,
maclobdell	0:f7c60d3e7b8a	1306	const unsigned char *sig )
maclobdell	0:f7c60d3e7b8a	1307	{
maclobdell	0:f7c60d3e7b8a	1308	int ret;
maclobdell	0:f7c60d3e7b8a	1309	size_t len, siglen, asn1_len;
maclobdell	0:f7c60d3e7b8a	1310	unsigned char p, end;
maclobdell	0:f7c60d3e7b8a	1311	unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
maclobdell	0:f7c60d3e7b8a	1312	mbedtls_md_type_t msg_md_alg;
maclobdell	0:f7c60d3e7b8a	1313	const mbedtls_md_info_t *md_info;
maclobdell	0:f7c60d3e7b8a	1314	mbedtls_asn1_buf oid;
maclobdell	0:f7c60d3e7b8a	1315
maclobdell	0:f7c60d3e7b8a	1316	if( mode == MBEDTLS_RSA_PRIVATE && ctx->padding != MBEDTLS_RSA_PKCS_V15 )
maclobdell	0:f7c60d3e7b8a	1317	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	1318
maclobdell	0:f7c60d3e7b8a	1319	siglen = ctx->len;
maclobdell	0:f7c60d3e7b8a	1320
maclobdell	0:f7c60d3e7b8a	1321	if( siglen < 16 \|\| siglen > sizeof( buf ) )
maclobdell	0:f7c60d3e7b8a	1322	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	1323
maclobdell	0:f7c60d3e7b8a	1324	ret = ( mode == MBEDTLS_RSA_PUBLIC )
maclobdell	0:f7c60d3e7b8a	1325	? mbedtls_rsa_public( ctx, sig, buf )
maclobdell	0:f7c60d3e7b8a	1326	: mbedtls_rsa_private( ctx, f_rng, p_rng, sig, buf );
maclobdell	0:f7c60d3e7b8a	1327
maclobdell	0:f7c60d3e7b8a	1328	if( ret != 0 )
maclobdell	0:f7c60d3e7b8a	1329	return( ret );
maclobdell	0:f7c60d3e7b8a	1330
maclobdell	0:f7c60d3e7b8a	1331	p = buf;
maclobdell	0:f7c60d3e7b8a	1332
maclobdell	0:f7c60d3e7b8a	1333	if( p++ != 0 \|\| p++ != MBEDTLS_RSA_SIGN )
maclobdell	0:f7c60d3e7b8a	1334	return( MBEDTLS_ERR_RSA_INVALID_PADDING );
maclobdell	0:f7c60d3e7b8a	1335
maclobdell	0:f7c60d3e7b8a	1336	while( *p != 0 )
maclobdell	0:f7c60d3e7b8a	1337	{
maclobdell	0:f7c60d3e7b8a	1338	if( p >= buf + siglen - 1 \|\| *p != 0xFF )
maclobdell	0:f7c60d3e7b8a	1339	return( MBEDTLS_ERR_RSA_INVALID_PADDING );
maclobdell	0:f7c60d3e7b8a	1340	p++;
maclobdell	0:f7c60d3e7b8a	1341	}
maclobdell	0:f7c60d3e7b8a	1342	p++;
maclobdell	0:f7c60d3e7b8a	1343
maclobdell	0:f7c60d3e7b8a	1344	len = siglen - ( p - buf );
maclobdell	0:f7c60d3e7b8a	1345
maclobdell	0:f7c60d3e7b8a	1346	if( len == hashlen && md_alg == MBEDTLS_MD_NONE )
maclobdell	0:f7c60d3e7b8a	1347	{
maclobdell	0:f7c60d3e7b8a	1348	if( memcmp( p, hash, hashlen ) == 0 )
maclobdell	0:f7c60d3e7b8a	1349	return( 0 );
maclobdell	0:f7c60d3e7b8a	1350	else
maclobdell	0:f7c60d3e7b8a	1351	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1352	}
maclobdell	0:f7c60d3e7b8a	1353
maclobdell	0:f7c60d3e7b8a	1354	md_info = mbedtls_md_info_from_type( md_alg );
maclobdell	0:f7c60d3e7b8a	1355	if( md_info == NULL )
maclobdell	0:f7c60d3e7b8a	1356	return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
maclobdell	0:f7c60d3e7b8a	1357	hashlen = mbedtls_md_get_size( md_info );
maclobdell	0:f7c60d3e7b8a	1358
maclobdell	0:f7c60d3e7b8a	1359	end = p + len;
maclobdell	0:f7c60d3e7b8a	1360
maclobdell	0:f7c60d3e7b8a	1361	// Parse the ASN.1 structure inside the PKCS#1 v1.5 structure
maclobdell	0:f7c60d3e7b8a	1362	//
maclobdell	0:f7c60d3e7b8a	1363	if( ( ret = mbedtls_asn1_get_tag( &p, end, &asn1_len,
maclobdell	0:f7c60d3e7b8a	1364	MBEDTLS_ASN1_CONSTRUCTED \| MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell	0:f7c60d3e7b8a	1365	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1366
maclobdell	0:f7c60d3e7b8a	1367	if( asn1_len + 2 != len )
maclobdell	0:f7c60d3e7b8a	1368	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1369
maclobdell	0:f7c60d3e7b8a	1370	if( ( ret = mbedtls_asn1_get_tag( &p, end, &asn1_len,
maclobdell	0:f7c60d3e7b8a	1371	MBEDTLS_ASN1_CONSTRUCTED \| MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
maclobdell	0:f7c60d3e7b8a	1372	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1373
maclobdell	0:f7c60d3e7b8a	1374	if( asn1_len + 6 + hashlen != len )
maclobdell	0:f7c60d3e7b8a	1375	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1376
maclobdell	0:f7c60d3e7b8a	1377	if( ( ret = mbedtls_asn1_get_tag( &p, end, &oid.len, MBEDTLS_ASN1_OID ) ) != 0 )
maclobdell	0:f7c60d3e7b8a	1378	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1379
maclobdell	0:f7c60d3e7b8a	1380	oid.p = p;
maclobdell	0:f7c60d3e7b8a	1381	p += oid.len;
maclobdell	0:f7c60d3e7b8a	1382
maclobdell	0:f7c60d3e7b8a	1383	if( mbedtls_oid_get_md_alg( &oid, &msg_md_alg ) != 0 )
maclobdell	0:f7c60d3e7b8a	1384	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1385
maclobdell	0:f7c60d3e7b8a	1386	if( md_alg != msg_md_alg )
maclobdell	0:f7c60d3e7b8a	1387	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1388
maclobdell	0:f7c60d3e7b8a	1389	/*
maclobdell	0:f7c60d3e7b8a	1390	* assume the algorithm parameters must be NULL
maclobdell	0:f7c60d3e7b8a	1391	*/
maclobdell	0:f7c60d3e7b8a	1392	if( ( ret = mbedtls_asn1_get_tag( &p, end, &asn1_len, MBEDTLS_ASN1_NULL ) ) != 0 )
maclobdell	0:f7c60d3e7b8a	1393	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1394
maclobdell	0:f7c60d3e7b8a	1395	if( ( ret = mbedtls_asn1_get_tag( &p, end, &asn1_len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
maclobdell	0:f7c60d3e7b8a	1396	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1397
maclobdell	0:f7c60d3e7b8a	1398	if( asn1_len != hashlen )
maclobdell	0:f7c60d3e7b8a	1399	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1400
maclobdell	0:f7c60d3e7b8a	1401	if( memcmp( p, hash, hashlen ) != 0 )
maclobdell	0:f7c60d3e7b8a	1402	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1403
maclobdell	0:f7c60d3e7b8a	1404	p += hashlen;
maclobdell	0:f7c60d3e7b8a	1405
maclobdell	0:f7c60d3e7b8a	1406	if( p != end )
maclobdell	0:f7c60d3e7b8a	1407	return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
maclobdell	0:f7c60d3e7b8a	1408
maclobdell	0:f7c60d3e7b8a	1409	return( 0 );
maclobdell	0:f7c60d3e7b8a	1410	}
maclobdell	0:f7c60d3e7b8a	1411	#endif /* MBEDTLS_PKCS1_V15 */
maclobdell	0:f7c60d3e7b8a	1412
maclobdell	0:f7c60d3e7b8a	1413	/*
maclobdell	0:f7c60d3e7b8a	1414	* Do an RSA operation and check the message digest
maclobdell	0:f7c60d3e7b8a	1415	*/
maclobdell	0:f7c60d3e7b8a	1416	int mbedtls_rsa_pkcs1_verify( mbedtls_rsa_context *ctx,
maclobdell	0:f7c60d3e7b8a	1417	int (f_rng)(void , unsigned char *, size_t),
maclobdell	0:f7c60d3e7b8a	1418	void *p_rng,
maclobdell	0:f7c60d3e7b8a	1419	int mode,
maclobdell	0:f7c60d3e7b8a	1420	mbedtls_md_type_t md_alg,
maclobdell	0:f7c60d3e7b8a	1421	unsigned int hashlen,
maclobdell	0:f7c60d3e7b8a	1422	const unsigned char *hash,
maclobdell	0:f7c60d3e7b8a	1423	const unsigned char *sig )
maclobdell	0:f7c60d3e7b8a	1424	{
maclobdell	0:f7c60d3e7b8a	1425	switch( ctx->padding )
maclobdell	0:f7c60d3e7b8a	1426	{
maclobdell	0:f7c60d3e7b8a	1427	#if defined(MBEDTLS_PKCS1_V15)
maclobdell	0:f7c60d3e7b8a	1428	case MBEDTLS_RSA_PKCS_V15:
maclobdell	0:f7c60d3e7b8a	1429	return mbedtls_rsa_rsassa_pkcs1_v15_verify( ctx, f_rng, p_rng, mode, md_alg,
maclobdell	0:f7c60d3e7b8a	1430	hashlen, hash, sig );
maclobdell	0:f7c60d3e7b8a	1431	#endif
maclobdell	0:f7c60d3e7b8a	1432
maclobdell	0:f7c60d3e7b8a	1433	#if defined(MBEDTLS_PKCS1_V21)
maclobdell	0:f7c60d3e7b8a	1434	case MBEDTLS_RSA_PKCS_V21:
maclobdell	0:f7c60d3e7b8a	1435	return mbedtls_rsa_rsassa_pss_verify( ctx, f_rng, p_rng, mode, md_alg,
maclobdell	0:f7c60d3e7b8a	1436	hashlen, hash, sig );
maclobdell	0:f7c60d3e7b8a	1437	#endif
maclobdell	0:f7c60d3e7b8a	1438
maclobdell	0:f7c60d3e7b8a	1439	default:
maclobdell	0:f7c60d3e7b8a	1440	return( MBEDTLS_ERR_RSA_INVALID_PADDING );
maclobdell	0:f7c60d3e7b8a	1441	}
maclobdell	0:f7c60d3e7b8a	1442	}
maclobdell	0:f7c60d3e7b8a	1443
maclobdell	0:f7c60d3e7b8a	1444	/*
maclobdell	0:f7c60d3e7b8a	1445	* Copy the components of an RSA key
maclobdell	0:f7c60d3e7b8a	1446	*/
maclobdell	0:f7c60d3e7b8a	1447	int mbedtls_rsa_copy( mbedtls_rsa_context dst, const mbedtls_rsa_context src )
maclobdell	0:f7c60d3e7b8a	1448	{
maclobdell	0:f7c60d3e7b8a	1449	int ret;
maclobdell	0:f7c60d3e7b8a	1450
maclobdell	0:f7c60d3e7b8a	1451	dst->ver = src->ver;
maclobdell	0:f7c60d3e7b8a	1452	dst->len = src->len;
maclobdell	0:f7c60d3e7b8a	1453
maclobdell	0:f7c60d3e7b8a	1454	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->N, &src->N ) );
maclobdell	0:f7c60d3e7b8a	1455	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->E, &src->E ) );
maclobdell	0:f7c60d3e7b8a	1456
maclobdell	0:f7c60d3e7b8a	1457	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->D, &src->D ) );
maclobdell	0:f7c60d3e7b8a	1458	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->P, &src->P ) );
maclobdell	0:f7c60d3e7b8a	1459	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->Q, &src->Q ) );
maclobdell	0:f7c60d3e7b8a	1460	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->DP, &src->DP ) );
maclobdell	0:f7c60d3e7b8a	1461	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->DQ, &src->DQ ) );
maclobdell	0:f7c60d3e7b8a	1462	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->QP, &src->QP ) );
maclobdell	0:f7c60d3e7b8a	1463
maclobdell	0:f7c60d3e7b8a	1464	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->RN, &src->RN ) );
maclobdell	0:f7c60d3e7b8a	1465	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->RP, &src->RP ) );
maclobdell	0:f7c60d3e7b8a	1466	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->RQ, &src->RQ ) );
maclobdell	0:f7c60d3e7b8a	1467
maclobdell	0:f7c60d3e7b8a	1468	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->Vi, &src->Vi ) );
maclobdell	0:f7c60d3e7b8a	1469	MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &dst->Vf, &src->Vf ) );
maclobdell	0:f7c60d3e7b8a	1470
maclobdell	0:f7c60d3e7b8a	1471	dst->padding = src->padding;
maclobdell	0:f7c60d3e7b8a	1472	dst->hash_id = src->hash_id;
maclobdell	0:f7c60d3e7b8a	1473
maclobdell	0:f7c60d3e7b8a	1474	cleanup:
maclobdell	0:f7c60d3e7b8a	1475	if( ret != 0 )
maclobdell	0:f7c60d3e7b8a	1476	mbedtls_rsa_free( dst );
maclobdell	0:f7c60d3e7b8a	1477
maclobdell	0:f7c60d3e7b8a	1478	return( ret );
maclobdell	0:f7c60d3e7b8a	1479	}
maclobdell	0:f7c60d3e7b8a	1480
maclobdell	0:f7c60d3e7b8a	1481	/*
maclobdell	0:f7c60d3e7b8a	1482	* Free the components of an RSA key
maclobdell	0:f7c60d3e7b8a	1483	*/
maclobdell	0:f7c60d3e7b8a	1484	void mbedtls_rsa_free( mbedtls_rsa_context *ctx )
maclobdell	0:f7c60d3e7b8a	1485	{
maclobdell	0:f7c60d3e7b8a	1486	mbedtls_mpi_free( &ctx->Vi ); mbedtls_mpi_free( &ctx->Vf );
maclobdell	0:f7c60d3e7b8a	1487	mbedtls_mpi_free( &ctx->RQ ); mbedtls_mpi_free( &ctx->RP ); mbedtls_mpi_free( &ctx->RN );
maclobdell	0:f7c60d3e7b8a	1488	mbedtls_mpi_free( &ctx->QP ); mbedtls_mpi_free( &ctx->DQ ); mbedtls_mpi_free( &ctx->DP );
maclobdell	0:f7c60d3e7b8a	1489	mbedtls_mpi_free( &ctx->Q ); mbedtls_mpi_free( &ctx->P ); mbedtls_mpi_free( &ctx->D );
maclobdell	0:f7c60d3e7b8a	1490	mbedtls_mpi_free( &ctx->E ); mbedtls_mpi_free( &ctx->N );
maclobdell	0:f7c60d3e7b8a	1491
maclobdell	0:f7c60d3e7b8a	1492	#if defined(MBEDTLS_THREADING_C)
maclobdell	0:f7c60d3e7b8a	1493	mbedtls_mutex_free( &ctx->mutex );
maclobdell	0:f7c60d3e7b8a	1494	#endif
maclobdell	0:f7c60d3e7b8a	1495	}
maclobdell	0:f7c60d3e7b8a	1496
maclobdell	0:f7c60d3e7b8a	1497	#if defined(MBEDTLS_SELF_TEST)
maclobdell	0:f7c60d3e7b8a	1498
maclobdell	0:f7c60d3e7b8a	1499	#include "mbedtls/sha1.h"
maclobdell	0:f7c60d3e7b8a	1500
maclobdell	0:f7c60d3e7b8a	1501	/*
maclobdell	0:f7c60d3e7b8a	1502	* Example RSA-1024 keypair, for test purposes
maclobdell	0:f7c60d3e7b8a	1503	*/
maclobdell	0:f7c60d3e7b8a	1504	#define KEY_LEN 128
maclobdell	0:f7c60d3e7b8a	1505
maclobdell	0:f7c60d3e7b8a	1506	#define RSA_N "9292758453063D803DD603D5E777D788" \
maclobdell	0:f7c60d3e7b8a	1507	"8ED1D5BF35786190FA2F23EBC0848AEA" \
maclobdell	0:f7c60d3e7b8a	1508	"DDA92CA6C3D80B32C4D109BE0F36D6AE" \
maclobdell	0:f7c60d3e7b8a	1509	"7130B9CED7ACDF54CFC7555AC14EEBAB" \
maclobdell	0:f7c60d3e7b8a	1510	"93A89813FBF3C4F8066D2D800F7C38A8" \
maclobdell	0:f7c60d3e7b8a	1511	"1AE31942917403FF4946B0A83D3D3E05" \
maclobdell	0:f7c60d3e7b8a	1512	"EE57C6F5F5606FB5D4BC6CD34EE0801A" \
maclobdell	0:f7c60d3e7b8a	1513	"5E94BB77B07507233A0BC7BAC8F90F79"
maclobdell	0:f7c60d3e7b8a	1514
maclobdell	0:f7c60d3e7b8a	1515	#define RSA_E "10001"
maclobdell	0:f7c60d3e7b8a	1516
maclobdell	0:f7c60d3e7b8a	1517	#define RSA_D "24BF6185468786FDD303083D25E64EFC" \
maclobdell	0:f7c60d3e7b8a	1518	"66CA472BC44D253102F8B4A9D3BFA750" \
maclobdell	0:f7c60d3e7b8a	1519	"91386C0077937FE33FA3252D28855837" \
maclobdell	0:f7c60d3e7b8a	1520	"AE1B484A8A9A45F7EE8C0C634F99E8CD" \
maclobdell	0:f7c60d3e7b8a	1521	"DF79C5CE07EE72C7F123142198164234" \
maclobdell	0:f7c60d3e7b8a	1522	"CABB724CF78B8173B9F880FC86322407" \
maclobdell	0:f7c60d3e7b8a	1523	"AF1FEDFDDE2BEB674CA15F3E81A1521E" \
maclobdell	0:f7c60d3e7b8a	1524	"071513A1E85B5DFA031F21ECAE91A34D"
maclobdell	0:f7c60d3e7b8a	1525
maclobdell	0:f7c60d3e7b8a	1526	#define RSA_P "C36D0EB7FCD285223CFB5AABA5BDA3D8" \
maclobdell	0:f7c60d3e7b8a	1527	"2C01CAD19EA484A87EA4377637E75500" \
maclobdell	0:f7c60d3e7b8a	1528	"FCB2005C5C7DD6EC4AC023CDA285D796" \
maclobdell	0:f7c60d3e7b8a	1529	"C3D9E75E1EFC42488BB4F1D13AC30A57"
maclobdell	0:f7c60d3e7b8a	1530
maclobdell	0:f7c60d3e7b8a	1531	#define RSA_Q "C000DF51A7C77AE8D7C7370C1FF55B69" \
maclobdell	0:f7c60d3e7b8a	1532	"E211C2B9E5DB1ED0BF61D0D9899620F4" \
maclobdell	0:f7c60d3e7b8a	1533	"910E4168387E3C30AA1E00C339A79508" \
maclobdell	0:f7c60d3e7b8a	1534	"8452DD96A9A5EA5D9DCA68DA636032AF"
maclobdell	0:f7c60d3e7b8a	1535
maclobdell	0:f7c60d3e7b8a	1536	#define RSA_DP "C1ACF567564274FB07A0BBAD5D26E298" \
maclobdell	0:f7c60d3e7b8a	1537	"3C94D22288ACD763FD8E5600ED4A702D" \
maclobdell	0:f7c60d3e7b8a	1538	"F84198A5F06C2E72236AE490C93F07F8" \
maclobdell	0:f7c60d3e7b8a	1539	"3CC559CD27BC2D1CA488811730BB5725"
maclobdell	0:f7c60d3e7b8a	1540
maclobdell	0:f7c60d3e7b8a	1541	#define RSA_DQ "4959CBF6F8FEF750AEE6977C155579C7" \
maclobdell	0:f7c60d3e7b8a	1542	"D8AAEA56749EA28623272E4F7D0592AF" \
maclobdell	0:f7c60d3e7b8a	1543	"7C1F1313CAC9471B5C523BFE592F517B" \
maclobdell	0:f7c60d3e7b8a	1544	"407A1BD76C164B93DA2D32A383E58357"
maclobdell	0:f7c60d3e7b8a	1545
maclobdell	0:f7c60d3e7b8a	1546	#define RSA_QP "9AE7FBC99546432DF71896FC239EADAE" \
maclobdell	0:f7c60d3e7b8a	1547	"F38D18D2B2F0E2DD275AA977E2BF4411" \
maclobdell	0:f7c60d3e7b8a	1548	"F5A3B2A5D33605AEBBCCBA7FEB9F2D2F" \
maclobdell	0:f7c60d3e7b8a	1549	"A74206CEC169D74BF5A8C50D6F48EA08"
maclobdell	0:f7c60d3e7b8a	1550
maclobdell	0:f7c60d3e7b8a	1551	#define PT_LEN 24
maclobdell	0:f7c60d3e7b8a	1552	#define RSA_PT "\xAA\xBB\xCC\x03\x02\x01\x00\xFF\xFF\xFF\xFF\xFF" \
maclobdell	0:f7c60d3e7b8a	1553	"\x11\x22\x33\x0A\x0B\x0C\xCC\xDD\xDD\xDD\xDD\xDD"
maclobdell	0:f7c60d3e7b8a	1554
maclobdell	0:f7c60d3e7b8a	1555	#if defined(MBEDTLS_PKCS1_V15)
maclobdell	0:f7c60d3e7b8a	1556	static int myrand( void rng_state, unsigned char output, size_t len )
maclobdell	0:f7c60d3e7b8a	1557	{
maclobdell	0:f7c60d3e7b8a	1558	#if !defined(__OpenBSD__)
maclobdell	0:f7c60d3e7b8a	1559	size_t i;
maclobdell	0:f7c60d3e7b8a	1560
maclobdell	0:f7c60d3e7b8a	1561	if( rng_state != NULL )
maclobdell	0:f7c60d3e7b8a	1562	rng_state = NULL;
maclobdell	0:f7c60d3e7b8a	1563
maclobdell	0:f7c60d3e7b8a	1564	for( i = 0; i < len; ++i )
maclobdell	0:f7c60d3e7b8a	1565	output[i] = rand();
maclobdell	0:f7c60d3e7b8a	1566	#else
maclobdell	0:f7c60d3e7b8a	1567	if( rng_state != NULL )
maclobdell	0:f7c60d3e7b8a	1568	rng_state = NULL;
maclobdell	0:f7c60d3e7b8a	1569
maclobdell	0:f7c60d3e7b8a	1570	arc4random_buf( output, len );
maclobdell	0:f7c60d3e7b8a	1571	#endif /* !OpenBSD */
maclobdell	0:f7c60d3e7b8a	1572
maclobdell	0:f7c60d3e7b8a	1573	return( 0 );
maclobdell	0:f7c60d3e7b8a	1574	}
maclobdell	0:f7c60d3e7b8a	1575	#endif /* MBEDTLS_PKCS1_V15 */
maclobdell	0:f7c60d3e7b8a	1576
maclobdell	0:f7c60d3e7b8a	1577	/*
maclobdell	0:f7c60d3e7b8a	1578	* Checkup routine
maclobdell	0:f7c60d3e7b8a	1579	*/
maclobdell	0:f7c60d3e7b8a	1580	int mbedtls_rsa_self_test( int verbose )
maclobdell	0:f7c60d3e7b8a	1581	{
maclobdell	0:f7c60d3e7b8a	1582	int ret = 0;
maclobdell	0:f7c60d3e7b8a	1583	#if defined(MBEDTLS_PKCS1_V15)
maclobdell	0:f7c60d3e7b8a	1584	size_t len;
maclobdell	0:f7c60d3e7b8a	1585	mbedtls_rsa_context rsa;
maclobdell	0:f7c60d3e7b8a	1586	unsigned char rsa_plaintext[PT_LEN];
maclobdell	0:f7c60d3e7b8a	1587	unsigned char rsa_decrypted[PT_LEN];
maclobdell	0:f7c60d3e7b8a	1588	unsigned char rsa_ciphertext[KEY_LEN];
maclobdell	0:f7c60d3e7b8a	1589	#if defined(MBEDTLS_SHA1_C)
maclobdell	0:f7c60d3e7b8a	1590	unsigned char sha1sum[20];
maclobdell	0:f7c60d3e7b8a	1591	#endif
maclobdell	0:f7c60d3e7b8a	1592
maclobdell	0:f7c60d3e7b8a	1593	mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, 0 );
maclobdell	0:f7c60d3e7b8a	1594
maclobdell	0:f7c60d3e7b8a	1595	rsa.len = KEY_LEN;
maclobdell	0:f7c60d3e7b8a	1596	MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &rsa.N , 16, RSA_N ) );
maclobdell	0:f7c60d3e7b8a	1597	MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &rsa.E , 16, RSA_E ) );
maclobdell	0:f7c60d3e7b8a	1598	MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &rsa.D , 16, RSA_D ) );
maclobdell	0:f7c60d3e7b8a	1599	MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &rsa.P , 16, RSA_P ) );
maclobdell	0:f7c60d3e7b8a	1600	MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &rsa.Q , 16, RSA_Q ) );
maclobdell	0:f7c60d3e7b8a	1601	MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &rsa.DP, 16, RSA_DP ) );
maclobdell	0:f7c60d3e7b8a	1602	MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &rsa.DQ, 16, RSA_DQ ) );
maclobdell	0:f7c60d3e7b8a	1603	MBEDTLS_MPI_CHK( mbedtls_mpi_read_string( &rsa.QP, 16, RSA_QP ) );
maclobdell	0:f7c60d3e7b8a	1604
maclobdell	0:f7c60d3e7b8a	1605	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1606	mbedtls_printf( " RSA key validation: " );
maclobdell	0:f7c60d3e7b8a	1607
maclobdell	0:f7c60d3e7b8a	1608	if( mbedtls_rsa_check_pubkey( &rsa ) != 0 \|\|
maclobdell	0:f7c60d3e7b8a	1609	mbedtls_rsa_check_privkey( &rsa ) != 0 )
maclobdell	0:f7c60d3e7b8a	1610	{
maclobdell	0:f7c60d3e7b8a	1611	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1612	mbedtls_printf( "failed\n" );
maclobdell	0:f7c60d3e7b8a	1613
maclobdell	0:f7c60d3e7b8a	1614	return( 1 );
maclobdell	0:f7c60d3e7b8a	1615	}
maclobdell	0:f7c60d3e7b8a	1616
maclobdell	0:f7c60d3e7b8a	1617	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1618	mbedtls_printf( "passed\n PKCS#1 encryption : " );
maclobdell	0:f7c60d3e7b8a	1619
maclobdell	0:f7c60d3e7b8a	1620	memcpy( rsa_plaintext, RSA_PT, PT_LEN );
maclobdell	0:f7c60d3e7b8a	1621
maclobdell	0:f7c60d3e7b8a	1622	if( mbedtls_rsa_pkcs1_encrypt( &rsa, myrand, NULL, MBEDTLS_RSA_PUBLIC, PT_LEN,
maclobdell	0:f7c60d3e7b8a	1623	rsa_plaintext, rsa_ciphertext ) != 0 )
maclobdell	0:f7c60d3e7b8a	1624	{
maclobdell	0:f7c60d3e7b8a	1625	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1626	mbedtls_printf( "failed\n" );
maclobdell	0:f7c60d3e7b8a	1627
maclobdell	0:f7c60d3e7b8a	1628	return( 1 );
maclobdell	0:f7c60d3e7b8a	1629	}
maclobdell	0:f7c60d3e7b8a	1630
maclobdell	0:f7c60d3e7b8a	1631	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1632	mbedtls_printf( "passed\n PKCS#1 decryption : " );
maclobdell	0:f7c60d3e7b8a	1633
maclobdell	0:f7c60d3e7b8a	1634	if( mbedtls_rsa_pkcs1_decrypt( &rsa, myrand, NULL, MBEDTLS_RSA_PRIVATE, &len,
maclobdell	0:f7c60d3e7b8a	1635	rsa_ciphertext, rsa_decrypted,
maclobdell	0:f7c60d3e7b8a	1636	sizeof(rsa_decrypted) ) != 0 )
maclobdell	0:f7c60d3e7b8a	1637	{
maclobdell	0:f7c60d3e7b8a	1638	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1639	mbedtls_printf( "failed\n" );
maclobdell	0:f7c60d3e7b8a	1640
maclobdell	0:f7c60d3e7b8a	1641	return( 1 );
maclobdell	0:f7c60d3e7b8a	1642	}
maclobdell	0:f7c60d3e7b8a	1643
maclobdell	0:f7c60d3e7b8a	1644	if( memcmp( rsa_decrypted, rsa_plaintext, len ) != 0 )
maclobdell	0:f7c60d3e7b8a	1645	{
maclobdell	0:f7c60d3e7b8a	1646	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1647	mbedtls_printf( "failed\n" );
maclobdell	0:f7c60d3e7b8a	1648
maclobdell	0:f7c60d3e7b8a	1649	return( 1 );
maclobdell	0:f7c60d3e7b8a	1650	}
maclobdell	0:f7c60d3e7b8a	1651
maclobdell	0:f7c60d3e7b8a	1652	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1653	mbedtls_printf( "passed\n" );
maclobdell	0:f7c60d3e7b8a	1654
maclobdell	0:f7c60d3e7b8a	1655	#if defined(MBEDTLS_SHA1_C)
maclobdell	0:f7c60d3e7b8a	1656	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1657	mbedtls_printf( "PKCS#1 data sign : " );
maclobdell	0:f7c60d3e7b8a	1658
maclobdell	0:f7c60d3e7b8a	1659	mbedtls_sha1( rsa_plaintext, PT_LEN, sha1sum );
maclobdell	0:f7c60d3e7b8a	1660
maclobdell	0:f7c60d3e7b8a	1661	if( mbedtls_rsa_pkcs1_sign( &rsa, myrand, NULL, MBEDTLS_RSA_PRIVATE, MBEDTLS_MD_SHA1, 0,
maclobdell	0:f7c60d3e7b8a	1662	sha1sum, rsa_ciphertext ) != 0 )
maclobdell	0:f7c60d3e7b8a	1663	{
maclobdell	0:f7c60d3e7b8a	1664	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1665	mbedtls_printf( "failed\n" );
maclobdell	0:f7c60d3e7b8a	1666
maclobdell	0:f7c60d3e7b8a	1667	return( 1 );
maclobdell	0:f7c60d3e7b8a	1668	}
maclobdell	0:f7c60d3e7b8a	1669
maclobdell	0:f7c60d3e7b8a	1670	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1671	mbedtls_printf( "passed\n PKCS#1 sig. verify: " );
maclobdell	0:f7c60d3e7b8a	1672
maclobdell	0:f7c60d3e7b8a	1673	if( mbedtls_rsa_pkcs1_verify( &rsa, NULL, NULL, MBEDTLS_RSA_PUBLIC, MBEDTLS_MD_SHA1, 0,
maclobdell	0:f7c60d3e7b8a	1674	sha1sum, rsa_ciphertext ) != 0 )
maclobdell	0:f7c60d3e7b8a	1675	{
maclobdell	0:f7c60d3e7b8a	1676	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1677	mbedtls_printf( "failed\n" );
maclobdell	0:f7c60d3e7b8a	1678
maclobdell	0:f7c60d3e7b8a	1679	return( 1 );
maclobdell	0:f7c60d3e7b8a	1680	}
maclobdell	0:f7c60d3e7b8a	1681
maclobdell	0:f7c60d3e7b8a	1682	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1683	mbedtls_printf( "passed\n" );
maclobdell	0:f7c60d3e7b8a	1684	#endif /* MBEDTLS_SHA1_C */
maclobdell	0:f7c60d3e7b8a	1685
maclobdell	0:f7c60d3e7b8a	1686	if( verbose != 0 )
maclobdell	0:f7c60d3e7b8a	1687	mbedtls_printf( "\n" );
maclobdell	0:f7c60d3e7b8a	1688
maclobdell	0:f7c60d3e7b8a	1689	cleanup:
maclobdell	0:f7c60d3e7b8a	1690	mbedtls_rsa_free( &rsa );
maclobdell	0:f7c60d3e7b8a	1691	#else /* MBEDTLS_PKCS1_V15 */
maclobdell	0:f7c60d3e7b8a	1692	((void) verbose);
maclobdell	0:f7c60d3e7b8a	1693	#endif /* MBEDTLS_PKCS1_V15 */
maclobdell	0:f7c60d3e7b8a	1694	return( ret );
maclobdell	0:f7c60d3e7b8a	1695	}
maclobdell	0:f7c60d3e7b8a	1696
maclobdell	0:f7c60d3e7b8a	1697	#endif /* MBEDTLS_SELF_TEST */
maclobdell	0:f7c60d3e7b8a	1698
maclobdell	0:f7c60d3e7b8a	1699	#endif /* MBEDTLS_RSA_C */

Repository toolbox

Export to desktop IDE

Build repository

Repository details

Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	19 May 2016
Imports:	0
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	5
Followers:	1

mbed-client/mbedtls/source/rsa.c@0:f7c60d3e7b8a, 2016-05-18 (annotated)

Who changed what in which revision?

Repository toolbox

Repository details

Important Information for this Arm website

Access Warning