Diff: mbedtls/source/asn1write.c

Revision:

13:bed103425508

Parent:

12:0071cb144c7a

Child:

14:79bcbfbb93c7

diff -r 0071cb144c7a -r bed103425508 mbedtls/source/asn1write.c
--- a/mbedtls/source/asn1write.c	Tue Nov 01 14:22:56 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,363 +0,0 @@
-/*
- * ASN.1 buffer writing functionality
- *
- *  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_ASN1_WRITE_C)
-
-#include "mbedtls/asn1write.h"
-
-#include <string.h>
-
-#if defined(MBEDTLS_PLATFORM_C)
-#include "mbedtls/platform.h"
-#else
-#include <stdlib.h>
-#define mbedtls_calloc    calloc
-#define mbedtls_free       free
-#endif
-
-int mbedtls_asn1_write_len( unsigned char **p, unsigned char *start, size_t len )
-{
-    if( len < 0x80 )
-    {
-        if( *p - start < 1 )
-            return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
-        *--(*p) = (unsigned char) len;
-        return( 1 );
-    }
-
-    if( len <= 0xFF )
-    {
-        if( *p - start < 2 )
-            return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
-        *--(*p) = (unsigned char) len;
-        *--(*p) = 0x81;
-        return( 2 );
-    }
-
-    if( *p - start < 3 )
-        return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
-    // We assume we never have lengths larger than 65535 bytes
-    //
-    *--(*p) = len % 256;
-    *--(*p) = ( len / 256 ) % 256;
-    *--(*p) = 0x82;
-
-    return( 3 );
-}
-
-int mbedtls_asn1_write_tag( unsigned char **p, unsigned char *start, unsigned char tag )
-{
-    if( *p - start < 1 )
-        return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
-    *--(*p) = tag;
-
-    return( 1 );
-}
-
-int mbedtls_asn1_write_raw_buffer( unsigned char **p, unsigned char *start,
-                           const unsigned char *buf, size_t size )
-{
-    size_t len = 0;
-
-    if( *p < start || (size_t)( *p - start ) < size )
-        return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
-    len = size;
-    (*p) -= len;
-    memcpy( *p, buf, len );
-
-    return( (int) len );
-}
-
-#if defined(MBEDTLS_BIGNUM_C)
-int mbedtls_asn1_write_mpi( unsigned char **p, unsigned char *start, const mbedtls_mpi *X )
-{
-    int ret;
-    size_t len = 0;
-
-    // Write the MPI
-    //
-    len = mbedtls_mpi_size( X );
-
-    if( *p < start || (size_t)( *p - start ) < len )
-        return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
-    (*p) -= len;
-    MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( X, *p, len ) );
-
-    // DER format assumes 2s complement for numbers, so the leftmost bit
-    // should be 0 for positive numbers and 1 for negative numbers.
-    //
-    if( X->s ==1 && **p & 0x80 )
-    {
-        if( *p - start < 1 )
-            return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
-        *--(*p) = 0x00;
-        len += 1;
-    }
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_INTEGER ) );
-
-    ret = (int) len;
-
-cleanup:
-    return( ret );
-}
-#endif /* MBEDTLS_BIGNUM_C */
-
-int mbedtls_asn1_write_null( unsigned char **p, unsigned char *start )
-{
-    int ret;
-    size_t len = 0;
-
-    // Write NULL
-    //
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, 0) );
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_NULL ) );
-
-    return( (int) len );
-}
-
-int mbedtls_asn1_write_oid( unsigned char **p, unsigned char *start,
-                    const char *oid, size_t oid_len )
-{
-    int ret;
-    size_t len = 0;
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
-                                  (const unsigned char *) oid, oid_len ) );
-    MBEDTLS_ASN1_CHK_ADD( len , mbedtls_asn1_write_len( p, start, len ) );
-    MBEDTLS_ASN1_CHK_ADD( len , mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OID ) );
-
-    return( (int) len );
-}
-
-int mbedtls_asn1_write_algorithm_identifier( unsigned char **p, unsigned char *start,
-                                     const char *oid, size_t oid_len,
-                                     size_t par_len )
-{
-    int ret;
-    size_t len = 0;
-
-    if( par_len == 0 )
-        MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_null( p, start ) );
-    else
-        len += par_len;
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( p, start, oid, oid_len ) );
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start,
-                                       MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) );
-
-    return( (int) len );
-}
-
-int mbedtls_asn1_write_bool( unsigned char **p, unsigned char *start, int boolean )
-{
-    int ret;
-    size_t len = 0;
-
-    if( *p - start < 1 )
-        return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
-    *--(*p) = (boolean) ? 255 : 0;
-    len++;
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BOOLEAN ) );
-
-    return( (int) len );
-}
-
-int mbedtls_asn1_write_int( unsigned char **p, unsigned char *start, int val )
-{
-    int ret;
-    size_t len = 0;
-
-    // TODO negative values and values larger than 128
-    // DER format assumes 2s complement for numbers, so the leftmost bit
-    // should be 0 for positive numbers and 1 for negative numbers.
-    //
-    if( *p - start < 1 )
-        return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
-    len += 1;
-    *--(*p) = val;
-
-    if( val > 0 && **p & 0x80 )
-    {
-        if( *p - start < 1 )
-            return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
-        *--(*p) = 0x00;
-        len += 1;
-    }
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_INTEGER ) );
-
-    return( (int) len );
-}
-
-int mbedtls_asn1_write_printable_string( unsigned char **p, unsigned char *start,
-                                 const char *text, size_t text_len )
-{
-    int ret;
-    size_t len = 0;
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
-                  (const unsigned char *) text, text_len ) );
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_PRINTABLE_STRING ) );
-
-    return( (int) len );
-}
-
-int mbedtls_asn1_write_ia5_string( unsigned char **p, unsigned char *start,
-                           const char *text, size_t text_len )
-{
-    int ret;
-    size_t len = 0;
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
-                  (const unsigned char *) text, text_len ) );
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_IA5_STRING ) );
-
-    return( (int) len );
-}
-
-int mbedtls_asn1_write_bitstring( unsigned char **p, unsigned char *start,
-                          const unsigned char *buf, size_t bits )
-{
-    int ret;
-    size_t len = 0, size;
-
-    size = ( bits / 8 ) + ( ( bits % 8 ) ? 1 : 0 );
-
-    // Calculate byte length
-    //
-    if( *p < start || (size_t)( *p - start ) < size + 1 )
-        return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
-    len = size + 1;
-    (*p) -= size;
-    memcpy( *p, buf, size );
-
-    // Write unused bits
-    //
-    *--(*p) = (unsigned char) (size * 8 - bits);
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BIT_STRING ) );
-
-    return( (int) len );
-}
-
-int mbedtls_asn1_write_octet_string( unsigned char **p, unsigned char *start,
-                             const unsigned char *buf, size_t size )
-{
-    int ret;
-    size_t len = 0;
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, buf, size ) );
-
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
-    MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OCTET_STRING ) );
-
-    return( (int) len );
-}
-
-mbedtls_asn1_named_data *mbedtls_asn1_store_named_data( mbedtls_asn1_named_data **head,
-                                        const char *oid, size_t oid_len,
-                                        const unsigned char *val,
-                                        size_t val_len )
-{
-    mbedtls_asn1_named_data *cur;
-
-    if( ( cur = mbedtls_asn1_find_named_data( *head, oid, oid_len ) ) == NULL )
-    {
-        // Add new entry if not present yet based on OID
-        //
-        cur = (mbedtls_asn1_named_data*)mbedtls_calloc( 1,
-                                            sizeof(mbedtls_asn1_named_data) );
-        if( cur == NULL )
-            return( NULL );
-
-        cur->oid.len = oid_len;
-        cur->oid.p = mbedtls_calloc( 1, oid_len );
-        if( cur->oid.p == NULL )
-        {
-            mbedtls_free( cur );
-            return( NULL );
-        }
-
-        memcpy( cur->oid.p, oid, oid_len );
-
-        cur->val.len = val_len;
-        cur->val.p = mbedtls_calloc( 1, val_len );
-        if( cur->val.p == NULL )
-        {
-            mbedtls_free( cur->oid.p );
-            mbedtls_free( cur );
-            return( NULL );
-        }
-
-        cur->next = *head;
-        *head = cur;
-    }
-    else if( cur->val.len < val_len )
-    {
-        /*
-         * Enlarge existing value buffer if needed
-         * Preserve old data until the allocation succeeded, to leave list in
-         * a consistent state in case allocation fails.
-         */
-        void *p = mbedtls_calloc( 1, val_len );
-        if( p == NULL )
-            return( NULL );
-
-        mbedtls_free( cur->val.p );
-        cur->val.p = p;
-        cur->val.len = val_len;
-    }
-
-    if( val != NULL )
-        memcpy( cur->val.p, val, val_len );
-
-    return( cur );
-}
-#endif /* MBEDTLS_ASN1_WRITE_C */