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Diff: mbedtls/source/pkparse.c
- Revision:
- 13:bed103425508
- Parent:
- 12:0071cb144c7a
- Child:
- 14:79bcbfbb93c7
--- a/mbedtls/source/pkparse.c Tue Nov 01 14:22:56 2016 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1293 +0,0 @@
-/*
- * Public Key layer for parsing key files and structures
- *
- * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
- * SPDX-License-Identifier: Apache-2.0
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * This file is part of mbed TLS (https://tls.mbed.org)
- */
-
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-#if defined(MBEDTLS_PK_PARSE_C)
-
-#include "mbedtls/pk.h"
-#include "mbedtls/asn1.h"
-#include "mbedtls/oid.h"
-
-#include <string.h>
-
-#if defined(MBEDTLS_RSA_C)
-#include "mbedtls/rsa.h"
-#endif
-#if defined(MBEDTLS_ECP_C)
-#include "mbedtls/ecp.h"
-#endif
-#if defined(MBEDTLS_ECDSA_C)
-#include "mbedtls/ecdsa.h"
-#endif
-#if defined(MBEDTLS_PEM_PARSE_C)
-#include "mbedtls/pem.h"
-#endif
-#if defined(MBEDTLS_PKCS5_C)
-#include "mbedtls/pkcs5.h"
-#endif
-#if defined(MBEDTLS_PKCS12_C)
-#include "mbedtls/pkcs12.h"
-#endif
-
-#if defined(MBEDTLS_PLATFORM_C)
-#include "mbedtls/platform.h"
-#else
-#include <stdlib.h>
-#define mbedtls_calloc calloc
-#define mbedtls_free free
-#endif
-
-#if defined(MBEDTLS_FS_IO)
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
- volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
-
-/*
- * Load all data from a file into a given buffer.
- *
- * The file is expected to contain either PEM or DER encoded data.
- * A terminating null byte is always appended. It is included in the announced
- * length only if the data looks like it is PEM encoded.
- */
-int mbedtls_pk_load_file( const char *path, unsigned char **buf, size_t *n )
-{
- FILE *f;
- long size;
-
- if( ( f = fopen( path, "rb" ) ) == NULL )
- return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
-
- fseek( f, 0, SEEK_END );
- if( ( size = ftell( f ) ) == -1 )
- {
- fclose( f );
- return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
- }
- fseek( f, 0, SEEK_SET );
-
- *n = (size_t) size;
-
- if( *n + 1 == 0 ||
- ( *buf = mbedtls_calloc( 1, *n + 1 ) ) == NULL )
- {
- fclose( f );
- return( MBEDTLS_ERR_PK_ALLOC_FAILED );
- }
-
- if( fread( *buf, 1, *n, f ) != *n )
- {
- fclose( f );
- mbedtls_free( *buf );
- return( MBEDTLS_ERR_PK_FILE_IO_ERROR );
- }
-
- fclose( f );
-
- (*buf)[*n] = '\0';
-
- if( strstr( (const char *) *buf, "-----BEGIN " ) != NULL )
- ++*n;
-
- return( 0 );
-}
-
-/*
- * Load and parse a private key
- */
-int mbedtls_pk_parse_keyfile( mbedtls_pk_context *ctx,
- const char *path, const char *pwd )
-{
- int ret;
- size_t n;
- unsigned char *buf;
-
- if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
- return( ret );
-
- if( pwd == NULL )
- ret = mbedtls_pk_parse_key( ctx, buf, n, NULL, 0 );
- else
- ret = mbedtls_pk_parse_key( ctx, buf, n,
- (const unsigned char *) pwd, strlen( pwd ) );
-
- mbedtls_zeroize( buf, n );
- mbedtls_free( buf );
-
- return( ret );
-}
-
-/*
- * Load and parse a public key
- */
-int mbedtls_pk_parse_public_keyfile( mbedtls_pk_context *ctx, const char *path )
-{
- int ret;
- size_t n;
- unsigned char *buf;
-
- if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
- return( ret );
-
- ret = mbedtls_pk_parse_public_key( ctx, buf, n );
-
- mbedtls_zeroize( buf, n );
- mbedtls_free( buf );
-
- return( ret );
-}
-#endif /* MBEDTLS_FS_IO */
-
-#if defined(MBEDTLS_ECP_C)
-/* Minimally parse an ECParameters buffer to and mbedtls_asn1_buf
- *
- * ECParameters ::= CHOICE {
- * namedCurve OBJECT IDENTIFIER
- * specifiedCurve SpecifiedECDomain -- = SEQUENCE { ... }
- * -- implicitCurve NULL
- * }
- */
-static int pk_get_ecparams( unsigned char **p, const unsigned char *end,
- mbedtls_asn1_buf *params )
-{
- int ret;
-
- /* Tag may be either OID or SEQUENCE */
- params->tag = **p;
- if( params->tag != MBEDTLS_ASN1_OID
-#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
- && params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE )
-#endif
- )
- {
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
- MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
- }
-
- if( ( ret = mbedtls_asn1_get_tag( p, end, ¶ms->len, params->tag ) ) != 0 )
- {
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- params->p = *p;
- *p += params->len;
-
- if( *p != end )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
-/*
- * Parse a SpecifiedECDomain (SEC 1 C.2) and (mostly) fill the group with it.
- * WARNING: the resulting group should only be used with
- * pk_group_id_from_specified(), since its base point may not be set correctly
- * if it was encoded compressed.
- *
- * SpecifiedECDomain ::= SEQUENCE {
- * version SpecifiedECDomainVersion(ecdpVer1 | ecdpVer2 | ecdpVer3, ...),
- * fieldID FieldID {{FieldTypes}},
- * curve Curve,
- * base ECPoint,
- * order INTEGER,
- * cofactor INTEGER OPTIONAL,
- * hash HashAlgorithm OPTIONAL,
- * ...
- * }
- *
- * We only support prime-field as field type, and ignore hash and cofactor.
- */
-static int pk_group_from_specified( const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp )
-{
- int ret;
- unsigned char *p = params->p;
- const unsigned char * const end = params->p + params->len;
- const unsigned char *end_field, *end_curve;
- size_t len;
- int ver;
-
- /* SpecifiedECDomainVersion ::= INTEGER { 1, 2, 3 } */
- if( ( ret = mbedtls_asn1_get_int( &p, end, &ver ) ) != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
-
- if( ver < 1 || ver > 3 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
-
- /*
- * FieldID { FIELD-ID:IOSet } ::= SEQUENCE { -- Finite field
- * fieldType FIELD-ID.&id({IOSet}),
- * parameters FIELD-ID.&Type({IOSet}{@fieldType})
- * }
- */
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- return( ret );
-
- end_field = p + len;
-
- /*
- * FIELD-ID ::= TYPE-IDENTIFIER
- * FieldTypes FIELD-ID ::= {
- * { Prime-p IDENTIFIED BY prime-field } |
- * { Characteristic-two IDENTIFIED BY characteristic-two-field }
- * }
- * prime-field OBJECT IDENTIFIER ::= { id-fieldType 1 }
- */
- if( ( ret = mbedtls_asn1_get_tag( &p, end_field, &len, MBEDTLS_ASN1_OID ) ) != 0 )
- return( ret );
-
- if( len != MBEDTLS_OID_SIZE( MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD ) ||
- memcmp( p, MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD, len ) != 0 )
- {
- return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
- }
-
- p += len;
-
- /* Prime-p ::= INTEGER -- Field of size p. */
- if( ( ret = mbedtls_asn1_get_mpi( &p, end_field, &grp->P ) ) != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
-
- grp->pbits = mbedtls_mpi_bitlen( &grp->P );
-
- if( p != end_field )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- /*
- * Curve ::= SEQUENCE {
- * a FieldElement,
- * b FieldElement,
- * seed BIT STRING OPTIONAL
- * -- Shall be present if used in SpecifiedECDomain
- * -- with version equal to ecdpVer2 or ecdpVer3
- * }
- */
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- return( ret );
-
- end_curve = p + len;
-
- /*
- * FieldElement ::= OCTET STRING
- * containing an integer in the case of a prime field
- */
- if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ||
- ( ret = mbedtls_mpi_read_binary( &grp->A, p, len ) ) != 0 )
- {
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- p += len;
-
- if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ||
- ( ret = mbedtls_mpi_read_binary( &grp->B, p, len ) ) != 0 )
- {
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- p += len;
-
- /* Ignore seed BIT STRING OPTIONAL */
- if( ( ret = mbedtls_asn1_get_tag( &p, end_curve, &len, MBEDTLS_ASN1_BIT_STRING ) ) == 0 )
- p += len;
-
- if( p != end_curve )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- /*
- * ECPoint ::= OCTET STRING
- */
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
-
- if( ( ret = mbedtls_ecp_point_read_binary( grp, &grp->G,
- ( const unsigned char *) p, len ) ) != 0 )
- {
- /*
- * If we can't read the point because it's compressed, cheat by
- * reading only the X coordinate and the parity bit of Y.
- */
- if( ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE ||
- ( p[0] != 0x02 && p[0] != 0x03 ) ||
- len != mbedtls_mpi_size( &grp->P ) + 1 ||
- mbedtls_mpi_read_binary( &grp->G.X, p + 1, len - 1 ) != 0 ||
- mbedtls_mpi_lset( &grp->G.Y, p[0] - 2 ) != 0 ||
- mbedtls_mpi_lset( &grp->G.Z, 1 ) != 0 )
- {
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
- }
- }
-
- p += len;
-
- /*
- * order INTEGER
- */
- if( ( ret = mbedtls_asn1_get_mpi( &p, end, &grp->N ) ) != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
-
- grp->nbits = mbedtls_mpi_bitlen( &grp->N );
-
- /*
- * Allow optional elements by purposefully not enforcing p == end here.
- */
-
- return( 0 );
-}
-
-/*
- * Find the group id associated with an (almost filled) group as generated by
- * pk_group_from_specified(), or return an error if unknown.
- */
-static int pk_group_id_from_group( const mbedtls_ecp_group *grp, mbedtls_ecp_group_id *grp_id )
-{
- int ret = 0;
- mbedtls_ecp_group ref;
- const mbedtls_ecp_group_id *id;
-
- mbedtls_ecp_group_init( &ref );
-
- for( id = mbedtls_ecp_grp_id_list(); *id != MBEDTLS_ECP_DP_NONE; id++ )
- {
- /* Load the group associated to that id */
- mbedtls_ecp_group_free( &ref );
- MBEDTLS_MPI_CHK( mbedtls_ecp_group_load( &ref, *id ) );
-
- /* Compare to the group we were given, starting with easy tests */
- if( grp->pbits == ref.pbits && grp->nbits == ref.nbits &&
- mbedtls_mpi_cmp_mpi( &grp->P, &ref.P ) == 0 &&
- mbedtls_mpi_cmp_mpi( &grp->A, &ref.A ) == 0 &&
- mbedtls_mpi_cmp_mpi( &grp->B, &ref.B ) == 0 &&
- mbedtls_mpi_cmp_mpi( &grp->N, &ref.N ) == 0 &&
- mbedtls_mpi_cmp_mpi( &grp->G.X, &ref.G.X ) == 0 &&
- mbedtls_mpi_cmp_mpi( &grp->G.Z, &ref.G.Z ) == 0 &&
- /* For Y we may only know the parity bit, so compare only that */
- mbedtls_mpi_get_bit( &grp->G.Y, 0 ) == mbedtls_mpi_get_bit( &ref.G.Y, 0 ) )
- {
- break;
- }
-
- }
-
-cleanup:
- mbedtls_ecp_group_free( &ref );
-
- *grp_id = *id;
-
- if( ret == 0 && *id == MBEDTLS_ECP_DP_NONE )
- ret = MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE;
-
- return( ret );
-}
-
-/*
- * Parse a SpecifiedECDomain (SEC 1 C.2) and find the associated group ID
- */
-static int pk_group_id_from_specified( const mbedtls_asn1_buf *params,
- mbedtls_ecp_group_id *grp_id )
-{
- int ret;
- mbedtls_ecp_group grp;
-
- mbedtls_ecp_group_init( &grp );
-
- if( ( ret = pk_group_from_specified( params, &grp ) ) != 0 )
- goto cleanup;
-
- ret = pk_group_id_from_group( &grp, grp_id );
-
-cleanup:
- mbedtls_ecp_group_free( &grp );
-
- return( ret );
-}
-#endif /* MBEDTLS_PK_PARSE_EC_EXTENDED */
-
-/*
- * Use EC parameters to initialise an EC group
- *
- * ECParameters ::= CHOICE {
- * namedCurve OBJECT IDENTIFIER
- * specifiedCurve SpecifiedECDomain -- = SEQUENCE { ... }
- * -- implicitCurve NULL
- */
-static int pk_use_ecparams( const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp )
-{
- int ret;
- mbedtls_ecp_group_id grp_id;
-
- if( params->tag == MBEDTLS_ASN1_OID )
- {
- if( mbedtls_oid_get_ec_grp( params, &grp_id ) != 0 )
- return( MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE );
- }
- else
- {
-#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
- if( ( ret = pk_group_id_from_specified( params, &grp_id ) ) != 0 )
- return( ret );
-#else
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
-#endif
- }
-
- /*
- * grp may already be initilialized; if so, make sure IDs match
- */
- if( grp->id != MBEDTLS_ECP_DP_NONE && grp->id != grp_id )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
-
- if( ( ret = mbedtls_ecp_group_load( grp, grp_id ) ) != 0 )
- return( ret );
-
- return( 0 );
-}
-
-/*
- * EC public key is an EC point
- *
- * The caller is responsible for clearing the structure upon failure if
- * desired. Take care to pass along the possible ECP_FEATURE_UNAVAILABLE
- * return code of mbedtls_ecp_point_read_binary() and leave p in a usable state.
- */
-static int pk_get_ecpubkey( unsigned char **p, const unsigned char *end,
- mbedtls_ecp_keypair *key )
-{
- int ret;
-
- if( ( ret = mbedtls_ecp_point_read_binary( &key->grp, &key->Q,
- (const unsigned char *) *p, end - *p ) ) == 0 )
- {
- ret = mbedtls_ecp_check_pubkey( &key->grp, &key->Q );
- }
-
- /*
- * We know mbedtls_ecp_point_read_binary consumed all bytes or failed
- */
- *p = (unsigned char *) end;
-
- return( ret );
-}
-#endif /* MBEDTLS_ECP_C */
-
-#if defined(MBEDTLS_RSA_C)
-/*
- * RSAPublicKey ::= SEQUENCE {
- * modulus INTEGER, -- n
- * publicExponent INTEGER -- e
- * }
- */
-static int pk_get_rsapubkey( unsigned char **p,
- const unsigned char *end,
- mbedtls_rsa_context *rsa )
-{
- int ret;
- size_t len;
-
- if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY + ret );
-
- if( *p + len != end )
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- if( ( ret = mbedtls_asn1_get_mpi( p, end, &rsa->N ) ) != 0 ||
- ( ret = mbedtls_asn1_get_mpi( p, end, &rsa->E ) ) != 0 )
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY + ret );
-
- if( *p != end )
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- if( ( ret = mbedtls_rsa_check_pubkey( rsa ) ) != 0 )
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY );
-
- rsa->len = mbedtls_mpi_size( &rsa->N );
-
- return( 0 );
-}
-#endif /* MBEDTLS_RSA_C */
-
-/* Get a PK algorithm identifier
- *
- * AlgorithmIdentifier ::= SEQUENCE {
- * algorithm OBJECT IDENTIFIER,
- * parameters ANY DEFINED BY algorithm OPTIONAL }
- */
-static int pk_get_pk_alg( unsigned char **p,
- const unsigned char *end,
- mbedtls_pk_type_t *pk_alg, mbedtls_asn1_buf *params )
-{
- int ret;
- mbedtls_asn1_buf alg_oid;
-
- memset( params, 0, sizeof(mbedtls_asn1_buf) );
-
- if( ( ret = mbedtls_asn1_get_alg( p, end, &alg_oid, params ) ) != 0 )
- return( MBEDTLS_ERR_PK_INVALID_ALG + ret );
-
- if( mbedtls_oid_get_pk_alg( &alg_oid, pk_alg ) != 0 )
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
-
- /*
- * No parameters with RSA (only for EC)
- */
- if( *pk_alg == MBEDTLS_PK_RSA &&
- ( ( params->tag != MBEDTLS_ASN1_NULL && params->tag != 0 ) ||
- params->len != 0 ) )
- {
- return( MBEDTLS_ERR_PK_INVALID_ALG );
- }
-
- return( 0 );
-}
-
-/*
- * SubjectPublicKeyInfo ::= SEQUENCE {
- * algorithm AlgorithmIdentifier,
- * subjectPublicKey BIT STRING }
- */
-int mbedtls_pk_parse_subpubkey( unsigned char **p, const unsigned char *end,
- mbedtls_pk_context *pk )
-{
- int ret;
- size_t len;
- mbedtls_asn1_buf alg_params;
- mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
- const mbedtls_pk_info_t *pk_info;
-
- if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- {
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- end = *p + len;
-
- if( ( ret = pk_get_pk_alg( p, end, &pk_alg, &alg_params ) ) != 0 )
- return( ret );
-
- if( ( ret = mbedtls_asn1_get_bitstring_null( p, end, &len ) ) != 0 )
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY + ret );
-
- if( *p + len != end )
- return( MBEDTLS_ERR_PK_INVALID_PUBKEY +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- if( ( pk_info = mbedtls_pk_info_from_type( pk_alg ) ) == NULL )
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
-
- if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 )
- return( ret );
-
-#if defined(MBEDTLS_RSA_C)
- if( pk_alg == MBEDTLS_PK_RSA )
- {
- ret = pk_get_rsapubkey( p, end, mbedtls_pk_rsa( *pk ) );
- } else
-#endif /* MBEDTLS_RSA_C */
-#if defined(MBEDTLS_ECP_C)
- if( pk_alg == MBEDTLS_PK_ECKEY_DH || pk_alg == MBEDTLS_PK_ECKEY )
- {
- ret = pk_use_ecparams( &alg_params, &mbedtls_pk_ec( *pk )->grp );
- if( ret == 0 )
- ret = pk_get_ecpubkey( p, end, mbedtls_pk_ec( *pk ) );
- } else
-#endif /* MBEDTLS_ECP_C */
- ret = MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;
-
- if( ret == 0 && *p != end )
- ret = MBEDTLS_ERR_PK_INVALID_PUBKEY
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH;
-
- if( ret != 0 )
- mbedtls_pk_free( pk );
-
- return( ret );
-}
-
-#if defined(MBEDTLS_RSA_C)
-/*
- * Parse a PKCS#1 encoded private RSA key
- */
-static int pk_parse_key_pkcs1_der( mbedtls_rsa_context *rsa,
- const unsigned char *key,
- size_t keylen )
-{
- int ret;
- size_t len;
- unsigned char *p, *end;
-
- p = (unsigned char *) key;
- end = p + keylen;
-
- /*
- * This function parses the RSAPrivateKey (PKCS#1)
- *
- * RSAPrivateKey ::= SEQUENCE {
- * version Version,
- * modulus INTEGER, -- n
- * publicExponent INTEGER, -- e
- * privateExponent INTEGER, -- d
- * prime1 INTEGER, -- p
- * prime2 INTEGER, -- q
- * exponent1 INTEGER, -- d mod (p-1)
- * exponent2 INTEGER, -- d mod (q-1)
- * coefficient INTEGER, -- (inverse of q) mod p
- * otherPrimeInfos OtherPrimeInfos OPTIONAL
- * }
- */
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- {
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- end = p + len;
-
- if( ( ret = mbedtls_asn1_get_int( &p, end, &rsa->ver ) ) != 0 )
- {
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- if( rsa->ver != 0 )
- {
- return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION );
- }
-
- if( ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->N ) ) != 0 ||
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->E ) ) != 0 ||
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->D ) ) != 0 ||
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->P ) ) != 0 ||
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->Q ) ) != 0 ||
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->DP ) ) != 0 ||
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->DQ ) ) != 0 ||
- ( ret = mbedtls_asn1_get_mpi( &p, end, &rsa->QP ) ) != 0 )
- {
- mbedtls_rsa_free( rsa );
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- rsa->len = mbedtls_mpi_size( &rsa->N );
-
- if( p != end )
- {
- mbedtls_rsa_free( rsa );
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
- }
-
- if( ( ret = mbedtls_rsa_check_privkey( rsa ) ) != 0 )
- {
- mbedtls_rsa_free( rsa );
- return( ret );
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_RSA_C */
-
-#if defined(MBEDTLS_ECP_C)
-/*
- * Parse a SEC1 encoded private EC key
- */
-static int pk_parse_key_sec1_der( mbedtls_ecp_keypair *eck,
- const unsigned char *key,
- size_t keylen )
-{
- int ret;
- int version, pubkey_done;
- size_t len;
- mbedtls_asn1_buf params;
- unsigned char *p = (unsigned char *) key;
- unsigned char *end = p + keylen;
- unsigned char *end2;
-
- /*
- * RFC 5915, or SEC1 Appendix C.4
- *
- * ECPrivateKey ::= SEQUENCE {
- * version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
- * privateKey OCTET STRING,
- * parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
- * publicKey [1] BIT STRING OPTIONAL
- * }
- */
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- {
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- end = p + len;
-
- if( ( ret = mbedtls_asn1_get_int( &p, end, &version ) ) != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
-
- if( version != 1 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION );
-
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
-
- if( ( ret = mbedtls_mpi_read_binary( &eck->d, p, len ) ) != 0 )
- {
- mbedtls_ecp_keypair_free( eck );
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- p += len;
-
- pubkey_done = 0;
- if( p != end )
- {
- /*
- * Is 'parameters' present?
- */
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
- MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0 ) ) == 0 )
- {
- if( ( ret = pk_get_ecparams( &p, p + len, ¶ms) ) != 0 ||
- ( ret = pk_use_ecparams( ¶ms, &eck->grp ) ) != 0 )
- {
- mbedtls_ecp_keypair_free( eck );
- return( ret );
- }
- }
- else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
- {
- mbedtls_ecp_keypair_free( eck );
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- /*
- * Is 'publickey' present? If not, or if we can't read it (eg because it
- * is compressed), create it from the private key.
- */
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
- MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 1 ) ) == 0 )
- {
- end2 = p + len;
-
- if( ( ret = mbedtls_asn1_get_bitstring_null( &p, end2, &len ) ) != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
-
- if( p + len != end2 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- if( ( ret = pk_get_ecpubkey( &p, end2, eck ) ) == 0 )
- pubkey_done = 1;
- else
- {
- /*
- * The only acceptable failure mode of pk_get_ecpubkey() above
- * is if the point format is not recognized.
- */
- if( ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
- }
- }
- else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
- {
- mbedtls_ecp_keypair_free( eck );
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
- }
-
- if( ! pubkey_done &&
- ( ret = mbedtls_ecp_mul( &eck->grp, &eck->Q, &eck->d, &eck->grp.G,
- NULL, NULL ) ) != 0 )
- {
- mbedtls_ecp_keypair_free( eck );
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- if( ( ret = mbedtls_ecp_check_privkey( &eck->grp, &eck->d ) ) != 0 )
- {
- mbedtls_ecp_keypair_free( eck );
- return( ret );
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_ECP_C */
-
-/*
- * Parse an unencrypted PKCS#8 encoded private key
- */
-static int pk_parse_key_pkcs8_unencrypted_der(
- mbedtls_pk_context *pk,
- const unsigned char* key,
- size_t keylen )
-{
- int ret, version;
- size_t len;
- mbedtls_asn1_buf params;
- unsigned char *p = (unsigned char *) key;
- unsigned char *end = p + keylen;
- mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
- const mbedtls_pk_info_t *pk_info;
-
- /*
- * This function parses the PrivatKeyInfo object (PKCS#8 v1.2 = RFC 5208)
- *
- * PrivateKeyInfo ::= SEQUENCE {
- * version Version,
- * privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
- * privateKey PrivateKey,
- * attributes [0] IMPLICIT Attributes OPTIONAL }
- *
- * Version ::= INTEGER
- * PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier
- * PrivateKey ::= OCTET STRING
- *
- * The PrivateKey OCTET STRING is a SEC1 ECPrivateKey
- */
-
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- {
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- end = p + len;
-
- if( ( ret = mbedtls_asn1_get_int( &p, end, &version ) ) != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
-
- if( version != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION + ret );
-
- if( ( ret = pk_get_pk_alg( &p, end, &pk_alg, ¶ms ) ) != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
-
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
-
- if( len < 1 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
- MBEDTLS_ERR_ASN1_OUT_OF_DATA );
-
- if( ( pk_info = mbedtls_pk_info_from_type( pk_alg ) ) == NULL )
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
-
- if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 )
- return( ret );
-
-#if defined(MBEDTLS_RSA_C)
- if( pk_alg == MBEDTLS_PK_RSA )
- {
- if( ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), p, len ) ) != 0 )
- {
- mbedtls_pk_free( pk );
- return( ret );
- }
- } else
-#endif /* MBEDTLS_RSA_C */
-#if defined(MBEDTLS_ECP_C)
- if( pk_alg == MBEDTLS_PK_ECKEY || pk_alg == MBEDTLS_PK_ECKEY_DH )
- {
- if( ( ret = pk_use_ecparams( ¶ms, &mbedtls_pk_ec( *pk )->grp ) ) != 0 ||
- ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ), p, len ) ) != 0 )
- {
- mbedtls_pk_free( pk );
- return( ret );
- }
- } else
-#endif /* MBEDTLS_ECP_C */
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
-
- return( 0 );
-}
-
-/*
- * Parse an encrypted PKCS#8 encoded private key
- */
-#if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
-static int pk_parse_key_pkcs8_encrypted_der(
- mbedtls_pk_context *pk,
- const unsigned char *key, size_t keylen,
- const unsigned char *pwd, size_t pwdlen )
-{
- int ret, decrypted = 0;
- size_t len;
- unsigned char buf[2048];
- unsigned char *p, *end;
- mbedtls_asn1_buf pbe_alg_oid, pbe_params;
-#if defined(MBEDTLS_PKCS12_C)
- mbedtls_cipher_type_t cipher_alg;
- mbedtls_md_type_t md_alg;
-#endif
-
- memset( buf, 0, sizeof( buf ) );
-
- p = (unsigned char *) key;
- end = p + keylen;
-
- if( pwdlen == 0 )
- return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
-
- /*
- * This function parses the EncryptedPrivatKeyInfo object (PKCS#8)
- *
- * EncryptedPrivateKeyInfo ::= SEQUENCE {
- * encryptionAlgorithm EncryptionAlgorithmIdentifier,
- * encryptedData EncryptedData
- * }
- *
- * EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
- *
- * EncryptedData ::= OCTET STRING
- *
- * The EncryptedData OCTET STRING is a PKCS#8 PrivateKeyInfo
- */
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- {
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
- }
-
- end = p + len;
-
- if( ( ret = mbedtls_asn1_get_alg( &p, end, &pbe_alg_oid, &pbe_params ) ) != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
-
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
-
- if( len > sizeof( buf ) )
- return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
-
- /*
- * Decrypt EncryptedData with appropriate PDE
- */
-#if defined(MBEDTLS_PKCS12_C)
- if( mbedtls_oid_get_pkcs12_pbe_alg( &pbe_alg_oid, &md_alg, &cipher_alg ) == 0 )
- {
- if( ( ret = mbedtls_pkcs12_pbe( &pbe_params, MBEDTLS_PKCS12_PBE_DECRYPT,
- cipher_alg, md_alg,
- pwd, pwdlen, p, len, buf ) ) != 0 )
- {
- if( ret == MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH )
- return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
-
- return( ret );
- }
-
- decrypted = 1;
- }
- else if( MBEDTLS_OID_CMP( MBEDTLS_OID_PKCS12_PBE_SHA1_RC4_128, &pbe_alg_oid ) == 0 )
- {
- if( ( ret = mbedtls_pkcs12_pbe_sha1_rc4_128( &pbe_params,
- MBEDTLS_PKCS12_PBE_DECRYPT,
- pwd, pwdlen,
- p, len, buf ) ) != 0 )
- {
- return( ret );
- }
-
- // Best guess for password mismatch when using RC4. If first tag is
- // not MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE
- //
- if( *buf != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) )
- return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
-
- decrypted = 1;
- }
- else
-#endif /* MBEDTLS_PKCS12_C */
-#if defined(MBEDTLS_PKCS5_C)
- if( MBEDTLS_OID_CMP( MBEDTLS_OID_PKCS5_PBES2, &pbe_alg_oid ) == 0 )
- {
- if( ( ret = mbedtls_pkcs5_pbes2( &pbe_params, MBEDTLS_PKCS5_DECRYPT, pwd, pwdlen,
- p, len, buf ) ) != 0 )
- {
- if( ret == MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH )
- return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
-
- return( ret );
- }
-
- decrypted = 1;
- }
- else
-#endif /* MBEDTLS_PKCS5_C */
- {
- ((void) pwd);
- }
-
- if( decrypted == 0 )
- return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
-
- return( pk_parse_key_pkcs8_unencrypted_der( pk, buf, len ) );
-}
-#endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
-
-/*
- * Parse a private key
- */
-int mbedtls_pk_parse_key( mbedtls_pk_context *pk,
- const unsigned char *key, size_t keylen,
- const unsigned char *pwd, size_t pwdlen )
-{
- int ret;
- const mbedtls_pk_info_t *pk_info;
-
-#if defined(MBEDTLS_PEM_PARSE_C)
- size_t len;
- mbedtls_pem_context pem;
-
- mbedtls_pem_init( &pem );
-
-#if defined(MBEDTLS_RSA_C)
- /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
- if( keylen == 0 || key[keylen - 1] != '\0' )
- ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
- else
- ret = mbedtls_pem_read_buffer( &pem,
- "-----BEGIN RSA PRIVATE KEY-----",
- "-----END RSA PRIVATE KEY-----",
- key, pwd, pwdlen, &len );
-
- if( ret == 0 )
- {
- if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL )
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
-
- if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
- ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ),
- pem.buf, pem.buflen ) ) != 0 )
- {
- mbedtls_pk_free( pk );
- }
-
- mbedtls_pem_free( &pem );
- return( ret );
- }
- else if( ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH )
- return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
- else if( ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED )
- return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
- else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
- return( ret );
-#endif /* MBEDTLS_RSA_C */
-
-#if defined(MBEDTLS_ECP_C)
- /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
- if( keylen == 0 || key[keylen - 1] != '\0' )
- ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
- else
- ret = mbedtls_pem_read_buffer( &pem,
- "-----BEGIN EC PRIVATE KEY-----",
- "-----END EC PRIVATE KEY-----",
- key, pwd, pwdlen, &len );
- if( ret == 0 )
- {
- if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY ) ) == NULL )
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
-
- if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
- ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ),
- pem.buf, pem.buflen ) ) != 0 )
- {
- mbedtls_pk_free( pk );
- }
-
- mbedtls_pem_free( &pem );
- return( ret );
- }
- else if( ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH )
- return( MBEDTLS_ERR_PK_PASSWORD_MISMATCH );
- else if( ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED )
- return( MBEDTLS_ERR_PK_PASSWORD_REQUIRED );
- else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
- return( ret );
-#endif /* MBEDTLS_ECP_C */
-
- /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
- if( keylen == 0 || key[keylen - 1] != '\0' )
- ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
- else
- ret = mbedtls_pem_read_buffer( &pem,
- "-----BEGIN PRIVATE KEY-----",
- "-----END PRIVATE KEY-----",
- key, NULL, 0, &len );
- if( ret == 0 )
- {
- if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk,
- pem.buf, pem.buflen ) ) != 0 )
- {
- mbedtls_pk_free( pk );
- }
-
- mbedtls_pem_free( &pem );
- return( ret );
- }
- else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
- return( ret );
-
-#if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
- /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
- if( keylen == 0 || key[keylen - 1] != '\0' )
- ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
- else
- ret = mbedtls_pem_read_buffer( &pem,
- "-----BEGIN ENCRYPTED PRIVATE KEY-----",
- "-----END ENCRYPTED PRIVATE KEY-----",
- key, NULL, 0, &len );
- if( ret == 0 )
- {
- if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk,
- pem.buf, pem.buflen,
- pwd, pwdlen ) ) != 0 )
- {
- mbedtls_pk_free( pk );
- }
-
- mbedtls_pem_free( &pem );
- return( ret );
- }
- else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
- return( ret );
-#endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
-#else
- ((void) ret);
- ((void) pwd);
- ((void) pwdlen);
-#endif /* MBEDTLS_PEM_PARSE_C */
-
- /*
- * At this point we only know it's not a PEM formatted key. Could be any
- * of the known DER encoded private key formats
- *
- * We try the different DER format parsers to see if one passes without
- * error
- */
-#if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
- if( ( ret = pk_parse_key_pkcs8_encrypted_der( pk, key, keylen,
- pwd, pwdlen ) ) == 0 )
- {
- return( 0 );
- }
-
- mbedtls_pk_free( pk );
-
- if( ret == MBEDTLS_ERR_PK_PASSWORD_MISMATCH )
- {
- return( ret );
- }
-#endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
-
- if( ( ret = pk_parse_key_pkcs8_unencrypted_der( pk, key, keylen ) ) == 0 )
- return( 0 );
-
- mbedtls_pk_free( pk );
-
-#if defined(MBEDTLS_RSA_C)
- if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == NULL )
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
-
- if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
- ( ret = pk_parse_key_pkcs1_der( mbedtls_pk_rsa( *pk ), key, keylen ) ) == 0 )
- {
- return( 0 );
- }
-
- mbedtls_pk_free( pk );
-#endif /* MBEDTLS_RSA_C */
-
-#if defined(MBEDTLS_ECP_C)
- if( ( pk_info = mbedtls_pk_info_from_type( MBEDTLS_PK_ECKEY ) ) == NULL )
- return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG );
-
- if( ( ret = mbedtls_pk_setup( pk, pk_info ) ) != 0 ||
- ( ret = pk_parse_key_sec1_der( mbedtls_pk_ec( *pk ), key, keylen ) ) == 0 )
- {
- return( 0 );
- }
-
- mbedtls_pk_free( pk );
-#endif /* MBEDTLS_ECP_C */
-
- return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
-}
-
-/*
- * Parse a public key
- */
-int mbedtls_pk_parse_public_key( mbedtls_pk_context *ctx,
- const unsigned char *key, size_t keylen )
-{
- int ret;
- unsigned char *p;
-#if defined(MBEDTLS_PEM_PARSE_C)
- size_t len;
- mbedtls_pem_context pem;
-
- mbedtls_pem_init( &pem );
-
- /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
- if( keylen == 0 || key[keylen - 1] != '\0' )
- ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
- else
- ret = mbedtls_pem_read_buffer( &pem,
- "-----BEGIN PUBLIC KEY-----",
- "-----END PUBLIC KEY-----",
- key, NULL, 0, &len );
-
- if( ret == 0 )
- {
- /*
- * Was PEM encoded
- */
- key = pem.buf;
- keylen = pem.buflen;
- }
- else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
- {
- mbedtls_pem_free( &pem );
- return( ret );
- }
-#endif /* MBEDTLS_PEM_PARSE_C */
- p = (unsigned char *) key;
-
- ret = mbedtls_pk_parse_subpubkey( &p, p + keylen, ctx );
-
-#if defined(MBEDTLS_PEM_PARSE_C)
- mbedtls_pem_free( &pem );
-#endif
-
- return( ret );
-}
-
-#endif /* MBEDTLS_PK_PARSE_C */
