diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/library/asn1parse.c')
| -rw-r--r-- | lib/mbedtls-2.27.0/library/asn1parse.c | 481 |
1 files changed, 0 insertions, 481 deletions
diff --git a/lib/mbedtls-2.27.0/library/asn1parse.c b/lib/mbedtls-2.27.0/library/asn1parse.c deleted file mode 100644 index 22747d3..0000000 --- a/lib/mbedtls-2.27.0/library/asn1parse.c +++ /dev/null @@ -1,481 +0,0 @@ -/* - * Generic ASN.1 parsing - * - * Copyright The Mbed TLS Contributors - * 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. - */ - -#include "common.h" - -#if defined(MBEDTLS_ASN1_PARSE_C) - -#include "mbedtls/asn1.h" -#include "mbedtls/platform_util.h" -#include "mbedtls/error.h" - -#include <string.h> - -#if defined(MBEDTLS_BIGNUM_C) -#include "mbedtls/bignum.h" -#endif - -#if defined(MBEDTLS_PLATFORM_C) -#include "mbedtls/platform.h" -#else -#include <stdlib.h> -#define mbedtls_calloc calloc -#define mbedtls_free free -#endif - -/* - * ASN.1 DER decoding routines - */ -int mbedtls_asn1_get_len( unsigned char **p, - const unsigned char *end, - size_t *len ) -{ - if( ( end - *p ) < 1 ) - return( MBEDTLS_ERR_ASN1_OUT_OF_DATA ); - - if( ( **p & 0x80 ) == 0 ) - *len = *(*p)++; - else - { - switch( **p & 0x7F ) - { - case 1: - if( ( end - *p ) < 2 ) - return( MBEDTLS_ERR_ASN1_OUT_OF_DATA ); - - *len = (*p)[1]; - (*p) += 2; - break; - - case 2: - if( ( end - *p ) < 3 ) - return( MBEDTLS_ERR_ASN1_OUT_OF_DATA ); - - *len = ( (size_t)(*p)[1] << 8 ) | (*p)[2]; - (*p) += 3; - break; - - case 3: - if( ( end - *p ) < 4 ) - return( MBEDTLS_ERR_ASN1_OUT_OF_DATA ); - - *len = ( (size_t)(*p)[1] << 16 ) | - ( (size_t)(*p)[2] << 8 ) | (*p)[3]; - (*p) += 4; - break; - - case 4: - if( ( end - *p ) < 5 ) - return( MBEDTLS_ERR_ASN1_OUT_OF_DATA ); - - *len = ( (size_t)(*p)[1] << 24 ) | ( (size_t)(*p)[2] << 16 ) | - ( (size_t)(*p)[3] << 8 ) | (*p)[4]; - (*p) += 5; - break; - - default: - return( MBEDTLS_ERR_ASN1_INVALID_LENGTH ); - } - } - - if( *len > (size_t) ( end - *p ) ) - return( MBEDTLS_ERR_ASN1_OUT_OF_DATA ); - - return( 0 ); -} - -int mbedtls_asn1_get_tag( unsigned char **p, - const unsigned char *end, - size_t *len, int tag ) -{ - if( ( end - *p ) < 1 ) - return( MBEDTLS_ERR_ASN1_OUT_OF_DATA ); - - if( **p != tag ) - return( MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ); - - (*p)++; - - return( mbedtls_asn1_get_len( p, end, len ) ); -} - -int mbedtls_asn1_get_bool( unsigned char **p, - const unsigned char *end, - int *val ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t len; - - if( ( ret = mbedtls_asn1_get_tag( p, end, &len, MBEDTLS_ASN1_BOOLEAN ) ) != 0 ) - return( ret ); - - if( len != 1 ) - return( MBEDTLS_ERR_ASN1_INVALID_LENGTH ); - - *val = ( **p != 0 ) ? 1 : 0; - (*p)++; - - return( 0 ); -} - -static int asn1_get_tagged_int( unsigned char **p, - const unsigned char *end, - int tag, int *val ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t len; - - if( ( ret = mbedtls_asn1_get_tag( p, end, &len, tag ) ) != 0 ) - return( ret ); - - /* - * len==0 is malformed (0 must be represented as 020100 for INTEGER, - * or 0A0100 for ENUMERATED tags - */ - if( len == 0 ) - return( MBEDTLS_ERR_ASN1_INVALID_LENGTH ); - /* This is a cryptography library. Reject negative integers. */ - if( ( **p & 0x80 ) != 0 ) - return( MBEDTLS_ERR_ASN1_INVALID_LENGTH ); - - /* Skip leading zeros. */ - while( len > 0 && **p == 0 ) - { - ++( *p ); - --len; - } - - /* Reject integers that don't fit in an int. This code assumes that - * the int type has no padding bit. */ - if( len > sizeof( int ) ) - return( MBEDTLS_ERR_ASN1_INVALID_LENGTH ); - if( len == sizeof( int ) && ( **p & 0x80 ) != 0 ) - return( MBEDTLS_ERR_ASN1_INVALID_LENGTH ); - - *val = 0; - while( len-- > 0 ) - { - *val = ( *val << 8 ) | **p; - (*p)++; - } - - return( 0 ); -} - -int mbedtls_asn1_get_int( unsigned char **p, - const unsigned char *end, - int *val ) -{ - return( asn1_get_tagged_int( p, end, MBEDTLS_ASN1_INTEGER, val) ); -} - -int mbedtls_asn1_get_enum( unsigned char **p, - const unsigned char *end, - int *val ) -{ - return( asn1_get_tagged_int( p, end, MBEDTLS_ASN1_ENUMERATED, val) ); -} - -#if defined(MBEDTLS_BIGNUM_C) -int mbedtls_asn1_get_mpi( unsigned char **p, - const unsigned char *end, - mbedtls_mpi *X ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t len; - - if( ( ret = mbedtls_asn1_get_tag( p, end, &len, MBEDTLS_ASN1_INTEGER ) ) != 0 ) - return( ret ); - - ret = mbedtls_mpi_read_binary( X, *p, len ); - - *p += len; - - return( ret ); -} -#endif /* MBEDTLS_BIGNUM_C */ - -int mbedtls_asn1_get_bitstring( unsigned char **p, const unsigned char *end, - mbedtls_asn1_bitstring *bs) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - /* Certificate type is a single byte bitstring */ - if( ( ret = mbedtls_asn1_get_tag( p, end, &bs->len, MBEDTLS_ASN1_BIT_STRING ) ) != 0 ) - return( ret ); - - /* Check length, subtract one for actual bit string length */ - if( bs->len < 1 ) - return( MBEDTLS_ERR_ASN1_OUT_OF_DATA ); - bs->len -= 1; - - /* Get number of unused bits, ensure unused bits <= 7 */ - bs->unused_bits = **p; - if( bs->unused_bits > 7 ) - return( MBEDTLS_ERR_ASN1_INVALID_LENGTH ); - (*p)++; - - /* Get actual bitstring */ - bs->p = *p; - *p += bs->len; - - if( *p != end ) - return( MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ); - - return( 0 ); -} - -/* - * Traverse an ASN.1 "SEQUENCE OF <tag>" - * and call a callback for each entry found. - */ -int mbedtls_asn1_traverse_sequence_of( - unsigned char **p, - const unsigned char *end, - unsigned char tag_must_mask, unsigned char tag_must_val, - unsigned char tag_may_mask, unsigned char tag_may_val, - int (*cb)( void *ctx, int tag, - unsigned char *start, size_t len ), - void *ctx ) -{ - int ret; - size_t len; - - /* Get main sequence tag */ - if( ( ret = mbedtls_asn1_get_tag( p, end, &len, - MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 ) - { - return( ret ); - } - - if( *p + len != end ) - return( MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ); - - while( *p < end ) - { - unsigned char const tag = *(*p)++; - - if( ( tag & tag_must_mask ) != tag_must_val ) - return( MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ); - - if( ( ret = mbedtls_asn1_get_len( p, end, &len ) ) != 0 ) - return( ret ); - - if( ( tag & tag_may_mask ) == tag_may_val ) - { - if( cb != NULL ) - { - ret = cb( ctx, tag, *p, len ); - if( ret != 0 ) - return( ret ); - } - } - - *p += len; - } - - return( 0 ); -} - -/* - * Get a bit string without unused bits - */ -int mbedtls_asn1_get_bitstring_null( unsigned char **p, const unsigned char *end, - size_t *len ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - if( ( ret = mbedtls_asn1_get_tag( p, end, len, MBEDTLS_ASN1_BIT_STRING ) ) != 0 ) - return( ret ); - - if( *len == 0 ) - return( MBEDTLS_ERR_ASN1_INVALID_DATA ); - --( *len ); - - if( **p != 0 ) - return( MBEDTLS_ERR_ASN1_INVALID_DATA ); - ++( *p ); - - return( 0 ); -} - -void mbedtls_asn1_sequence_free( mbedtls_asn1_sequence *seq ) -{ - while( seq != NULL ) - { - mbedtls_asn1_sequence *next = seq->next; - mbedtls_platform_zeroize( seq, sizeof( *seq ) ); - mbedtls_free( seq ); - seq = next; - } -} - -typedef struct -{ - int tag; - mbedtls_asn1_sequence *cur; -} asn1_get_sequence_of_cb_ctx_t; - -static int asn1_get_sequence_of_cb( void *ctx, - int tag, - unsigned char *start, - size_t len ) -{ - asn1_get_sequence_of_cb_ctx_t *cb_ctx = - (asn1_get_sequence_of_cb_ctx_t *) ctx; - mbedtls_asn1_sequence *cur = - cb_ctx->cur; - - if( cur->buf.p != NULL ) - { - cur->next = - mbedtls_calloc( 1, sizeof( mbedtls_asn1_sequence ) ); - - if( cur->next == NULL ) - return( MBEDTLS_ERR_ASN1_ALLOC_FAILED ); - - cur = cur->next; - } - - cur->buf.p = start; - cur->buf.len = len; - cur->buf.tag = tag; - - cb_ctx->cur = cur; - return( 0 ); -} - -/* - * Parses and splits an ASN.1 "SEQUENCE OF <tag>" - */ -int mbedtls_asn1_get_sequence_of( unsigned char **p, - const unsigned char *end, - mbedtls_asn1_sequence *cur, - int tag) -{ - asn1_get_sequence_of_cb_ctx_t cb_ctx = { tag, cur }; - memset( cur, 0, sizeof( mbedtls_asn1_sequence ) ); - return( mbedtls_asn1_traverse_sequence_of( - p, end, 0xFF, tag, 0, 0, - asn1_get_sequence_of_cb, &cb_ctx ) ); -} - -int mbedtls_asn1_get_alg( unsigned char **p, - const unsigned char *end, - mbedtls_asn1_buf *alg, mbedtls_asn1_buf *params ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t len; - - if( ( ret = mbedtls_asn1_get_tag( p, end, &len, - MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 ) - return( ret ); - - if( ( end - *p ) < 1 ) - return( MBEDTLS_ERR_ASN1_OUT_OF_DATA ); - - alg->tag = **p; - end = *p + len; - - if( ( ret = mbedtls_asn1_get_tag( p, end, &alg->len, MBEDTLS_ASN1_OID ) ) != 0 ) - return( ret ); - - alg->p = *p; - *p += alg->len; - - if( *p == end ) - { - mbedtls_platform_zeroize( params, sizeof(mbedtls_asn1_buf) ); - return( 0 ); - } - - params->tag = **p; - (*p)++; - - if( ( ret = mbedtls_asn1_get_len( p, end, ¶ms->len ) ) != 0 ) - return( ret ); - - params->p = *p; - *p += params->len; - - if( *p != end ) - return( MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ); - - return( 0 ); -} - -int mbedtls_asn1_get_alg_null( unsigned char **p, - const unsigned char *end, - mbedtls_asn1_buf *alg ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - mbedtls_asn1_buf params; - - memset( ¶ms, 0, sizeof(mbedtls_asn1_buf) ); - - if( ( ret = mbedtls_asn1_get_alg( p, end, alg, ¶ms ) ) != 0 ) - return( ret ); - - if( ( params.tag != MBEDTLS_ASN1_NULL && params.tag != 0 ) || params.len != 0 ) - return( MBEDTLS_ERR_ASN1_INVALID_DATA ); - - return( 0 ); -} - -void mbedtls_asn1_free_named_data( mbedtls_asn1_named_data *cur ) -{ - if( cur == NULL ) - return; - - mbedtls_free( cur->oid.p ); - mbedtls_free( cur->val.p ); - - mbedtls_platform_zeroize( cur, sizeof( mbedtls_asn1_named_data ) ); -} - -void mbedtls_asn1_free_named_data_list( mbedtls_asn1_named_data **head ) -{ - mbedtls_asn1_named_data *cur; - - while( ( cur = *head ) != NULL ) - { - *head = cur->next; - mbedtls_asn1_free_named_data( cur ); - mbedtls_free( cur ); - } -} - -mbedtls_asn1_named_data *mbedtls_asn1_find_named_data( mbedtls_asn1_named_data *list, - const char *oid, size_t len ) -{ - while( list != NULL ) - { - if( list->oid.len == len && - memcmp( list->oid.p, oid, len ) == 0 ) - { - break; - } - - list = list->next; - } - - return( list ); -} - -#endif /* MBEDTLS_ASN1_PARSE_C */ |