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Externals: Update mbedtls to 2.28.0
This commit is contained in:
OatmealDome
116
Externals/mbedtls/library/base64.c
vendored
116
Externals/mbedtls/library/base64.c
vendored
@ -1,7 +1,7 @@
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/*
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* RFC 1521 base64 encoding/decoding
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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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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@ -15,19 +15,14 @@
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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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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#include "common.h"
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#if defined(MBEDTLS_BASE64_C)
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#include "mbedtls/base64.h"
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#include "constant_time_internal.h"
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#include <stdint.h>
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@ -41,34 +36,6 @@
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#endif /* MBEDTLS_PLATFORM_C */
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#endif /* MBEDTLS_SELF_TEST */
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static const unsigned char base64_enc_map[64] =
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{
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'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
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'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
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'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
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'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
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'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
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'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', '+', '/'
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};
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static const unsigned char base64_dec_map[128] =
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{
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127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
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127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
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127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
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127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
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127, 127, 127, 62, 127, 127, 127, 63, 52, 53,
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54, 55, 56, 57, 58, 59, 60, 61, 127, 127,
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127, 64, 127, 127, 127, 0, 1, 2, 3, 4,
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5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
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15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
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25, 127, 127, 127, 127, 127, 127, 26, 27, 28,
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29, 30, 31, 32, 33, 34, 35, 36, 37, 38,
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39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
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49, 50, 51, 127, 127, 127, 127, 127
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};
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#define BASE64_SIZE_T_MAX ( (size_t) -1 ) /* SIZE_T_MAX is not standard */
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/*
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@ -111,10 +78,12 @@ int mbedtls_base64_encode( unsigned char *dst, size_t dlen, size_t *olen,
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C2 = *src++;
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C3 = *src++;
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*p++ = base64_enc_map[(C1 >> 2) & 0x3F];
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*p++ = base64_enc_map[(((C1 & 3) << 4) + (C2 >> 4)) & 0x3F];
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*p++ = base64_enc_map[(((C2 & 15) << 2) + (C3 >> 6)) & 0x3F];
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*p++ = base64_enc_map[C3 & 0x3F];
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*p++ = mbedtls_ct_base64_enc_char( ( C1 >> 2 ) & 0x3F );
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*p++ = mbedtls_ct_base64_enc_char( ( ( ( C1 & 3 ) << 4 ) + ( C2 >> 4 ) )
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& 0x3F );
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*p++ = mbedtls_ct_base64_enc_char( ( ( ( C2 & 15 ) << 2 ) + ( C3 >> 6 ) )
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& 0x3F );
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*p++ = mbedtls_ct_base64_enc_char( C3 & 0x3F );
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}
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if( i < slen )
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@ -122,11 +91,12 @@ int mbedtls_base64_encode( unsigned char *dst, size_t dlen, size_t *olen,
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C1 = *src++;
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C2 = ( ( i + 1 ) < slen ) ? *src++ : 0;
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*p++ = base64_enc_map[(C1 >> 2) & 0x3F];
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*p++ = base64_enc_map[(((C1 & 3) << 4) + (C2 >> 4)) & 0x3F];
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*p++ = mbedtls_ct_base64_enc_char( ( C1 >> 2 ) & 0x3F );
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*p++ = mbedtls_ct_base64_enc_char( ( ( ( C1 & 3 ) << 4 ) + ( C2 >> 4 ) )
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& 0x3F );
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if( ( i + 1 ) < slen )
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*p++ = base64_enc_map[((C2 & 15) << 2) & 0x3F];
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*p++ = mbedtls_ct_base64_enc_char( ( ( C2 & 15 ) << 2 ) & 0x3F );
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else *p++ = '=';
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*p++ = '=';
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@ -144,19 +114,23 @@ int mbedtls_base64_encode( unsigned char *dst, size_t dlen, size_t *olen,
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int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen,
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const unsigned char *src, size_t slen )
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{
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size_t i, n;
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uint32_t j, x;
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size_t i; /* index in source */
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size_t n; /* number of digits or trailing = in source */
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uint32_t x; /* value accumulator */
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unsigned accumulated_digits = 0;
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unsigned equals = 0;
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int spaces_present = 0;
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unsigned char *p;
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/* First pass: check for validity and get output length */
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for( i = n = j = 0; i < slen; i++ )
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for( i = n = 0; i < slen; i++ )
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{
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/* Skip spaces before checking for EOL */
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x = 0;
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spaces_present = 0;
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while( i < slen && src[i] == ' ' )
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{
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++i;
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++x;
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spaces_present = 1;
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}
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/* Spaces at end of buffer are OK */
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@ -171,18 +145,24 @@ int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen,
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continue;
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/* Space inside a line is an error */
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if( x != 0 )
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if( spaces_present )
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return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER );
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if( src[i] == '=' && ++j > 2 )
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return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER );
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if( src[i] > 127 || base64_dec_map[src[i]] == 127 )
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return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER );
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if( base64_dec_map[src[i]] < 64 && j != 0 )
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if( src[i] > 127 )
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return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER );
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if( src[i] == '=' )
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{
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if( ++equals > 2 )
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return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER );
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}
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else
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{
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if( equals != 0 )
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return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER );
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if( mbedtls_ct_base64_dec_value( src[i] ) < 0 )
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return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER );
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}
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n++;
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}
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@ -197,7 +177,7 @@ int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen,
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* n = ( ( n * 6 ) + 7 ) >> 3;
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*/
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n = ( 6 * ( n >> 3 ) ) + ( ( 6 * ( n & 0x7 ) + 7 ) >> 3 );
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n -= j;
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n -= equals;
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if( dst == NULL || dlen < n )
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{
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@ -205,20 +185,24 @@ int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen,
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return( MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL );
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}
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for( j = 3, n = x = 0, p = dst; i > 0; i--, src++ )
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{
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equals = 0;
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for( x = 0, p = dst; i > 0; i--, src++ )
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{
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if( *src == '\r' || *src == '\n' || *src == ' ' )
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continue;
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j -= ( base64_dec_map[*src] == 64 );
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x = ( x << 6 ) | ( base64_dec_map[*src] & 0x3F );
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x = x << 6;
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if( *src == '=' )
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++equals;
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else
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x |= mbedtls_ct_base64_dec_value( *src );
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if( ++n == 4 )
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if( ++accumulated_digits == 4 )
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{
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n = 0;
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if( j > 0 ) *p++ = (unsigned char)( x >> 16 );
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if( j > 1 ) *p++ = (unsigned char)( x >> 8 );
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if( j > 2 ) *p++ = (unsigned char)( x );
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accumulated_digits = 0;
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*p++ = MBEDTLS_BYTE_2( x );
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if( equals <= 1 ) *p++ = MBEDTLS_BYTE_1( x );
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if( equals <= 0 ) *p++ = MBEDTLS_BYTE_0( x );
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}
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}
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