mirror of
https://github.com/jart/cosmopolitan.git
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Flatten Mbed TLS directory structure
This commit is contained in:
Justine Tunney
parent
d0ac995dc0
commit
1beeb7a829
199 changed files with 1184 additions and 944 deletions
485
third_party/mbedtls/asn1write.c
vendored
Normal file
485
third_party/mbedtls/asn1write.c
vendored
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@ -0,0 +1,485 @@
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/* clang-format off */
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asm(".ident\t\"\\n\\n\
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Mbed TLS (Apache 2.0)\\n\
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Copyright The Mbed TLS Contributors\"");
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asm(".include \"libc/disclaimer.inc\"");
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/*
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* ASN.1 buffer writing functionality
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "third_party/mbedtls/common.h"
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#if defined(MBEDTLS_ASN1_WRITE_C)
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#include "third_party/mbedtls/asn1write.h"
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#include "third_party/mbedtls/error.h"
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#if defined(MBEDTLS_PLATFORM_C)
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#include "third_party/mbedtls/platform.h"
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#else
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#define mbedtls_calloc calloc
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#define mbedtls_free free
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#endif
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int mbedtls_asn1_write_len( unsigned char **p, unsigned char *start, size_t len )
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{
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if( len < 0x80 )
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{
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if( *p - start < 1 )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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*--(*p) = (unsigned char) len;
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return( 1 );
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}
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if( len <= 0xFF )
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{
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if( *p - start < 2 )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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*--(*p) = (unsigned char) len;
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*--(*p) = 0x81;
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return( 2 );
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}
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if( len <= 0xFFFF )
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{
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if( *p - start < 3 )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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*--(*p) = ( len ) & 0xFF;
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*--(*p) = ( len >> 8 ) & 0xFF;
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*--(*p) = 0x82;
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return( 3 );
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}
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if( len <= 0xFFFFFF )
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{
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if( *p - start < 4 )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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*--(*p) = ( len ) & 0xFF;
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*--(*p) = ( len >> 8 ) & 0xFF;
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*--(*p) = ( len >> 16 ) & 0xFF;
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*--(*p) = 0x83;
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return( 4 );
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}
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#if SIZE_MAX > 0xFFFFFFFF
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if( len <= 0xFFFFFFFF )
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#endif
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{
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if( *p - start < 5 )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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*--(*p) = ( len ) & 0xFF;
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*--(*p) = ( len >> 8 ) & 0xFF;
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*--(*p) = ( len >> 16 ) & 0xFF;
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*--(*p) = ( len >> 24 ) & 0xFF;
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*--(*p) = 0x84;
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return( 5 );
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}
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#if SIZE_MAX > 0xFFFFFFFF
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return( MBEDTLS_ERR_ASN1_INVALID_LENGTH );
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#endif
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}
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int mbedtls_asn1_write_tag( unsigned char **p, unsigned char *start, unsigned char tag )
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{
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if( *p - start < 1 )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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*--(*p) = tag;
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return( 1 );
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}
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int mbedtls_asn1_write_raw_buffer( unsigned char **p, unsigned char *start,
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const unsigned char *buf, size_t size )
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{
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size_t len = 0;
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if( *p < start || (size_t)( *p - start ) < size )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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len = size;
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(*p) -= len;
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memcpy( *p, buf, len );
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return( (int) len );
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}
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#if defined(MBEDTLS_BIGNUM_C)
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int mbedtls_asn1_write_mpi( unsigned char **p, unsigned char *start, const mbedtls_mpi *X )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t len = 0;
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// Write the MPI
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//
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len = mbedtls_mpi_size( X );
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if( *p < start || (size_t)( *p - start ) < len )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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(*p) -= len;
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MBEDTLS_MPI_CHK( mbedtls_mpi_write_binary( X, *p, len ) );
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// DER format assumes 2s complement for numbers, so the leftmost bit
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// should be 0 for positive numbers and 1 for negative numbers.
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//
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if( X->s ==1 && **p & 0x80 )
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{
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if( *p - start < 1 )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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*--(*p) = 0x00;
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len += 1;
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}
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_INTEGER ) );
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ret = (int) len;
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cleanup:
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return( ret );
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}
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#endif /* MBEDTLS_BIGNUM_C */
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int mbedtls_asn1_write_null( unsigned char **p, unsigned char *start )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t len = 0;
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// Write NULL
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//
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, 0) );
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_NULL ) );
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return( (int) len );
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}
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int mbedtls_asn1_write_oid( unsigned char **p, unsigned char *start,
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const char *oid, size_t oid_len )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t len = 0;
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
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(const unsigned char *) oid, oid_len ) );
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MBEDTLS_ASN1_CHK_ADD( len , mbedtls_asn1_write_len( p, start, len ) );
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MBEDTLS_ASN1_CHK_ADD( len , mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OID ) );
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return( (int) len );
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}
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int mbedtls_asn1_write_algorithm_identifier( unsigned char **p, unsigned char *start,
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const char *oid, size_t oid_len,
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size_t par_len )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t len = 0;
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if( par_len == 0 )
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_null( p, start ) );
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else
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len += par_len;
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( p, start, oid, oid_len ) );
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start,
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MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) );
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return( (int) len );
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}
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int mbedtls_asn1_write_bool( unsigned char **p, unsigned char *start, int boolean )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t len = 0;
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if( *p - start < 1 )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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*--(*p) = (boolean) ? 255 : 0;
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len++;
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BOOLEAN ) );
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return( (int) len );
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}
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static int asn1_write_tagged_int( unsigned char **p, unsigned char *start, int val, int tag )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t len = 0;
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do
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{
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if( *p - start < 1 )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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len += 1;
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*--(*p) = val & 0xff;
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val >>= 8;
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}
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while( val > 0 );
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if( **p & 0x80 )
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{
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if( *p - start < 1 )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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*--(*p) = 0x00;
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len += 1;
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}
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, tag ) );
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return( (int) len );
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}
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int mbedtls_asn1_write_int( unsigned char **p, unsigned char *start, int val )
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{
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return( asn1_write_tagged_int( p, start, val, MBEDTLS_ASN1_INTEGER ) );
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}
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int mbedtls_asn1_write_enum( unsigned char **p, unsigned char *start, int val )
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{
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return( asn1_write_tagged_int( p, start, val, MBEDTLS_ASN1_ENUMERATED ) );
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}
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int mbedtls_asn1_write_tagged_string( unsigned char **p, unsigned char *start, int tag,
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const char *text, size_t text_len )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t len = 0;
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start,
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(const unsigned char *) text, text_len ) );
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, tag ) );
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return( (int) len );
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}
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int mbedtls_asn1_write_utf8_string( unsigned char **p, unsigned char *start,
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const char *text, size_t text_len )
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{
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return( mbedtls_asn1_write_tagged_string(p, start, MBEDTLS_ASN1_UTF8_STRING, text, text_len) );
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}
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int mbedtls_asn1_write_printable_string( unsigned char **p, unsigned char *start,
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const char *text, size_t text_len )
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{
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return( mbedtls_asn1_write_tagged_string(p, start, MBEDTLS_ASN1_PRINTABLE_STRING, text, text_len) );
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}
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int mbedtls_asn1_write_ia5_string( unsigned char **p, unsigned char *start,
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const char *text, size_t text_len )
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{
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return( mbedtls_asn1_write_tagged_string(p, start, MBEDTLS_ASN1_IA5_STRING, text, text_len) );
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}
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int mbedtls_asn1_write_named_bitstring( unsigned char **p,
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unsigned char *start,
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const unsigned char *buf,
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size_t bits )
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{
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size_t unused_bits, byte_len;
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const unsigned char *cur_byte;
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unsigned char cur_byte_shifted;
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unsigned char bit;
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byte_len = ( bits + 7 ) / 8;
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unused_bits = ( byte_len * 8 ) - bits;
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/*
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* Named bitstrings require that trailing 0s are excluded in the encoding
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* of the bitstring. Trailing 0s are considered part of the 'unused' bits
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* when encoding this value in the first content octet
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*/
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if( bits != 0 )
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{
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cur_byte = buf + byte_len - 1;
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cur_byte_shifted = *cur_byte >> unused_bits;
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for( ; ; )
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{
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bit = cur_byte_shifted & 0x1;
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cur_byte_shifted >>= 1;
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if( bit != 0 )
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break;
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bits--;
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if( bits == 0 )
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break;
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if( bits % 8 == 0 )
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cur_byte_shifted = *--cur_byte;
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}
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}
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return( mbedtls_asn1_write_bitstring( p, start, buf, bits ) );
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}
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int mbedtls_asn1_write_bitstring( unsigned char **p, unsigned char *start,
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const unsigned char *buf, size_t bits )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t len = 0;
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size_t unused_bits, byte_len;
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byte_len = ( bits + 7 ) / 8;
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unused_bits = ( byte_len * 8 ) - bits;
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if( *p < start || (size_t)( *p - start ) < byte_len + 1 )
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return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
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len = byte_len + 1;
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/* Write the bitstring. Ensure the unused bits are zeroed */
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if( byte_len > 0 )
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{
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byte_len--;
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*--( *p ) = buf[byte_len] & ~( ( 0x1 << unused_bits ) - 1 );
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( *p ) -= byte_len;
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memcpy( *p, buf, byte_len );
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}
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/* Write unused bits */
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*--( *p ) = (unsigned char)unused_bits;
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BIT_STRING ) );
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return( (int) len );
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}
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int mbedtls_asn1_write_octet_string( unsigned char **p, unsigned char *start,
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const unsigned char *buf, size_t size )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t len = 0;
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, buf, size ) );
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) );
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MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OCTET_STRING ) );
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return( (int) len );
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}
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/* This is a copy of the ASN.1 parsing function mbedtls_asn1_find_named_data(),
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* which is replicated to avoid a dependency ASN1_WRITE_C on ASN1_PARSE_C. */
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static mbedtls_asn1_named_data *asn1_find_named_data(
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mbedtls_asn1_named_data *list,
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const char *oid, size_t len )
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{
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while( list != NULL )
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{
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if( list->oid.len == len &&
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memcmp( list->oid.p, oid, len ) == 0 )
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{
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break;
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}
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list = list->next;
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}
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return( list );
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}
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mbedtls_asn1_named_data *mbedtls_asn1_store_named_data(
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mbedtls_asn1_named_data **head,
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const char *oid, size_t oid_len,
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const unsigned char *val,
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size_t val_len )
|
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{
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mbedtls_asn1_named_data *cur;
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if( ( cur = asn1_find_named_data( *head, oid, oid_len ) ) == NULL )
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{
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// Add new entry if not present yet based on OID
|
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//
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cur = (mbedtls_asn1_named_data*)mbedtls_calloc( 1,
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sizeof(mbedtls_asn1_named_data) );
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if( cur == NULL )
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return( NULL );
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||||
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cur->oid.len = oid_len;
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cur->oid.p = mbedtls_calloc( 1, oid_len );
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if( cur->oid.p == NULL )
|
||||
{
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mbedtls_free( cur );
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return( NULL );
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}
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memcpy( cur->oid.p, oid, oid_len );
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cur->val.len = val_len;
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if( val_len != 0 )
|
||||
{
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cur->val.p = mbedtls_calloc( 1, val_len );
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if( cur->val.p == NULL )
|
||||
{
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||||
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 */
|
||||
Loading…
Add table
Add a link
Reference in a new issue