aboutsummaryrefslogtreecommitdiff
path: root/lib/mbedtls-2.27.0/library/asn1write.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/mbedtls-2.27.0/library/asn1write.c')
-rw-r--r--lib/mbedtls-2.27.0/library/asn1write.c480
1 files changed, 0 insertions, 480 deletions
diff --git a/lib/mbedtls-2.27.0/library/asn1write.c b/lib/mbedtls-2.27.0/library/asn1write.c
deleted file mode 100644
index deb1a2f..0000000
--- a/lib/mbedtls-2.27.0/library/asn1write.c
+++ /dev/null
@@ -1,480 +0,0 @@
-/*
- * ASN.1 buffer writing functionality
- *
- * 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_WRITE_C)
-
-#include "mbedtls/asn1write.h"
-#include "mbedtls/error.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( len <= 0xFFFF )
- {
- if( *p - start < 3 )
- return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
- *--(*p) = ( len ) & 0xFF;
- *--(*p) = ( len >> 8 ) & 0xFF;
- *--(*p) = 0x82;
- return( 3 );
- }
-
- if( len <= 0xFFFFFF )
- {
- if( *p - start < 4 )
- return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
- *--(*p) = ( len ) & 0xFF;
- *--(*p) = ( len >> 8 ) & 0xFF;
- *--(*p) = ( len >> 16 ) & 0xFF;
- *--(*p) = 0x83;
- return( 4 );
- }
-
-#if SIZE_MAX > 0xFFFFFFFF
- if( len <= 0xFFFFFFFF )
-#endif
- {
- if( *p - start < 5 )
- return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
- *--(*p) = ( len ) & 0xFF;
- *--(*p) = ( len >> 8 ) & 0xFF;
- *--(*p) = ( len >> 16 ) & 0xFF;
- *--(*p) = ( len >> 24 ) & 0xFF;
- *--(*p) = 0x84;
- return( 5 );
- }
-
-#if SIZE_MAX > 0xFFFFFFFF
- return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
-#endif
-}
-
-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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- 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 );
-}
-
-static int asn1_write_tagged_int( unsigned char **p, unsigned char *start, int val, int tag )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t len = 0;
-
- do
- {
- if( *p - start < 1 )
- return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
- len += 1;
- *--(*p) = val & 0xff;
- val >>= 8;
- }
- while( val > 0 );
-
- if( **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, tag ) );
-
- return( (int) len );
-}
-
-int mbedtls_asn1_write_int( unsigned char **p, unsigned char *start, int val )
-{
- return( asn1_write_tagged_int( p, start, val, MBEDTLS_ASN1_INTEGER ) );
-}
-
-int mbedtls_asn1_write_enum( unsigned char **p, unsigned char *start, int val )
-{
- return( asn1_write_tagged_int( p, start, val, MBEDTLS_ASN1_ENUMERATED ) );
-}
-
-int mbedtls_asn1_write_tagged_string( unsigned char **p, unsigned char *start, int tag,
- const char *text, size_t text_len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- 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, tag ) );
-
- return( (int) len );
-}
-
-int mbedtls_asn1_write_utf8_string( unsigned char **p, unsigned char *start,
- const char *text, size_t text_len )
-{
- return( mbedtls_asn1_write_tagged_string(p, start, MBEDTLS_ASN1_UTF8_STRING, text, text_len) );
-}
-
-int mbedtls_asn1_write_printable_string( unsigned char **p, unsigned char *start,
- const char *text, size_t text_len )
-{
- return( mbedtls_asn1_write_tagged_string(p, start, MBEDTLS_ASN1_PRINTABLE_STRING, text, text_len) );
-}
-
-int mbedtls_asn1_write_ia5_string( unsigned char **p, unsigned char *start,
- const char *text, size_t text_len )
-{
- return( mbedtls_asn1_write_tagged_string(p, start, MBEDTLS_ASN1_IA5_STRING, text, text_len) );
-}
-
-int mbedtls_asn1_write_named_bitstring( unsigned char **p,
- unsigned char *start,
- const unsigned char *buf,
- size_t bits )
-{
- size_t unused_bits, byte_len;
- const unsigned char *cur_byte;
- unsigned char cur_byte_shifted;
- unsigned char bit;
-
- byte_len = ( bits + 7 ) / 8;
- unused_bits = ( byte_len * 8 ) - bits;
-
- /*
- * Named bitstrings require that trailing 0s are excluded in the encoding
- * of the bitstring. Trailing 0s are considered part of the 'unused' bits
- * when encoding this value in the first content octet
- */
- if( bits != 0 )
- {
- cur_byte = buf + byte_len - 1;
- cur_byte_shifted = *cur_byte >> unused_bits;
-
- for( ; ; )
- {
- bit = cur_byte_shifted & 0x1;
- cur_byte_shifted >>= 1;
-
- if( bit != 0 )
- break;
-
- bits--;
- if( bits == 0 )
- break;
-
- if( bits % 8 == 0 )
- cur_byte_shifted = *--cur_byte;
- }
- }
-
- return( mbedtls_asn1_write_bitstring( p, start, buf, bits ) );
-}
-
-int mbedtls_asn1_write_bitstring( unsigned char **p, unsigned char *start,
- const unsigned char *buf, size_t bits )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t len = 0;
- size_t unused_bits, byte_len;
-
- byte_len = ( bits + 7 ) / 8;
- unused_bits = ( byte_len * 8 ) - bits;
-
- if( *p < start || (size_t)( *p - start ) < byte_len + 1 )
- return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
-
- len = byte_len + 1;
-
- /* Write the bitstring. Ensure the unused bits are zeroed */
- if( byte_len > 0 )
- {
- byte_len--;
- *--( *p ) = buf[byte_len] & ~( ( 0x1 << unused_bits ) - 1 );
- ( *p ) -= byte_len;
- memcpy( *p, buf, byte_len );
- }
-
- /* Write unused bits */
- *--( *p ) = (unsigned char)unused_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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- 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 );
-}
-
-
-/* This is a copy of the ASN.1 parsing function mbedtls_asn1_find_named_data(),
- * which is replicated to avoid a dependency ASN1_WRITE_C on ASN1_PARSE_C. */
-static mbedtls_asn1_named_data *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 );
-}
-
-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 = 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;
- if( val_len != 0 )
- {
- 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( val_len == 0 )
- {
- mbedtls_free( cur->val.p );
- cur->val.p = NULL;
- }
- 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 */