diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/library/base64.c')
| -rw-r--r-- | lib/mbedtls-2.27.0/library/base64.c | 396 |
1 files changed, 0 insertions, 396 deletions
diff --git a/lib/mbedtls-2.27.0/library/base64.c b/lib/mbedtls-2.27.0/library/base64.c deleted file mode 100644 index 1a05226..0000000 --- a/lib/mbedtls-2.27.0/library/base64.c +++ /dev/null @@ -1,396 +0,0 @@ -/* - * RFC 1521 base64 encoding/decoding - * - * 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_BASE64_C) - -#include "mbedtls/base64.h" - -#include <stdint.h> - -#if defined(MBEDTLS_SELF_TEST) -#include <string.h> -#if defined(MBEDTLS_PLATFORM_C) -#include "mbedtls/platform.h" -#else -#include <stdio.h> -#define mbedtls_printf printf -#endif /* MBEDTLS_PLATFORM_C */ -#endif /* MBEDTLS_SELF_TEST */ - -static const unsigned char base64_enc_map[64] = -{ - 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', - 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', - 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', - 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', - 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', - 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', - '8', '9', '+', '/' -}; - -static const unsigned char base64_dec_map[128] = -{ - 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, - 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, - 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, - 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, - 127, 127, 127, 62, 127, 127, 127, 63, 52, 53, - 54, 55, 56, 57, 58, 59, 60, 61, 127, 127, - 127, 64, 127, 127, 127, 0, 1, 2, 3, 4, - 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, - 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, - 25, 127, 127, 127, 127, 127, 127, 26, 27, 28, - 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, - 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, - 49, 50, 51, 127, 127, 127, 127, 127 -}; - -#define BASE64_SIZE_T_MAX ( (size_t) -1 ) /* SIZE_T_MAX is not standard */ - -/* - * Constant flow conditional assignment to unsigned char - */ -static void mbedtls_base64_cond_assign_uchar( unsigned char * dest, const unsigned char * const src, - unsigned char condition ) -{ - /* MSVC has a warning about unary minus on unsigned integer types, - * but this is well-defined and precisely what we want to do here. */ -#if defined(_MSC_VER) -#pragma warning( push ) -#pragma warning( disable : 4146 ) -#endif - - /* Generate bitmask from condition, mask will either be 0xFF or 0 */ - unsigned char mask = ( condition | -condition ); - mask >>= 7; - mask = -mask; - -#if defined(_MSC_VER) -#pragma warning( pop ) -#endif - - *dest = ( ( *src ) & mask ) | ( ( *dest ) & ~mask ); -} - -/* - * Constant flow conditional assignment to uint_32 - */ -static void mbedtls_base64_cond_assign_uint32( uint32_t * dest, const uint32_t src, - uint32_t condition ) -{ - /* MSVC has a warning about unary minus on unsigned integer types, - * but this is well-defined and precisely what we want to do here. */ -#if defined(_MSC_VER) -#pragma warning( push ) -#pragma warning( disable : 4146 ) -#endif - - /* Generate bitmask from condition, mask will either be 0xFFFFFFFF or 0 */ - uint32_t mask = ( condition | -condition ); - mask >>= 31; - mask = -mask; - -#if defined(_MSC_VER) -#pragma warning( pop ) -#endif - - *dest = ( src & mask ) | ( ( *dest ) & ~mask ); -} - -/* - * Constant flow check for equality - */ -static unsigned char mbedtls_base64_eq( size_t in_a, size_t in_b ) -{ - size_t difference = in_a ^ in_b; - - /* MSVC has a warning about unary minus on unsigned integer types, - * but this is well-defined and precisely what we want to do here. */ -#if defined(_MSC_VER) -#pragma warning( push ) -#pragma warning( disable : 4146 ) -#endif - - difference |= -difference; - -#if defined(_MSC_VER) -#pragma warning( pop ) -#endif - - /* cope with the varying size of size_t per platform */ - difference >>= ( sizeof( difference ) * 8 - 1 ); - - return (unsigned char) ( 1 ^ difference ); -} - -/* - * Constant flow lookup into table. - */ -static unsigned char mbedtls_base64_table_lookup( const unsigned char * const table, - const size_t table_size, const size_t table_index ) -{ - size_t i; - unsigned char result = 0; - - for( i = 0; i < table_size; ++i ) - { - mbedtls_base64_cond_assign_uchar( &result, &table[i], mbedtls_base64_eq( i, table_index ) ); - } - - return result; -} - -/* - * Encode a buffer into base64 format - */ -int mbedtls_base64_encode( unsigned char *dst, size_t dlen, size_t *olen, - const unsigned char *src, size_t slen ) -{ - size_t i, n; - int C1, C2, C3; - unsigned char *p; - - if( slen == 0 ) - { - *olen = 0; - return( 0 ); - } - - n = slen / 3 + ( slen % 3 != 0 ); - - if( n > ( BASE64_SIZE_T_MAX - 1 ) / 4 ) - { - *olen = BASE64_SIZE_T_MAX; - return( MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL ); - } - - n *= 4; - - if( ( dlen < n + 1 ) || ( NULL == dst ) ) - { - *olen = n + 1; - return( MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL ); - } - - n = ( slen / 3 ) * 3; - - for( i = 0, p = dst; i < n; i += 3 ) - { - C1 = *src++; - C2 = *src++; - C3 = *src++; - - *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), - ( ( C1 >> 2 ) & 0x3F ) ); - - *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), - ( ( ( ( C1 & 3 ) << 4 ) + ( C2 >> 4 ) ) & 0x3F ) ); - - *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), - ( ( ( ( C2 & 15 ) << 2 ) + ( C3 >> 6 ) ) & 0x3F ) ); - - *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), - ( C3 & 0x3F ) ); - } - - if( i < slen ) - { - C1 = *src++; - C2 = ( ( i + 1 ) < slen ) ? *src++ : 0; - - *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), - ( ( C1 >> 2 ) & 0x3F ) ); - - *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), - ( ( ( ( C1 & 3 ) << 4 ) + ( C2 >> 4 ) ) & 0x3F ) ); - - if( ( i + 1 ) < slen ) - *p++ = mbedtls_base64_table_lookup( base64_enc_map, sizeof( base64_enc_map ), - ( ( ( C2 & 15 ) << 2 ) & 0x3F ) ); - else *p++ = '='; - - *p++ = '='; - } - - *olen = p - dst; - *p = 0; - - return( 0 ); -} - -/* - * Decode a base64-formatted buffer - */ -int mbedtls_base64_decode( unsigned char *dst, size_t dlen, size_t *olen, - const unsigned char *src, size_t slen ) -{ - size_t i, n; - uint32_t j, x; - unsigned char *p; - unsigned char dec_map_lookup; - - /* First pass: check for validity and get output length */ - for( i = n = j = 0; i < slen; i++ ) - { - /* Skip spaces before checking for EOL */ - x = 0; - while( i < slen && src[i] == ' ' ) - { - ++i; - ++x; - } - - /* Spaces at end of buffer are OK */ - if( i == slen ) - break; - - if( ( slen - i ) >= 2 && - src[i] == '\r' && src[i + 1] == '\n' ) - continue; - - if( src[i] == '\n' ) - continue; - - /* Space inside a line is an error */ - if( x != 0 ) - return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER ); - - if( src[i] == '=' && ++j > 2 ) - return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER ); - - dec_map_lookup = mbedtls_base64_table_lookup( base64_dec_map, sizeof( base64_dec_map ), src[i] ); - - if( src[i] > 127 || dec_map_lookup == 127 ) - return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER ); - - if( dec_map_lookup < 64 && j != 0 ) - return( MBEDTLS_ERR_BASE64_INVALID_CHARACTER ); - - n++; - } - - if( n == 0 ) - { - *olen = 0; - return( 0 ); - } - - /* The following expression is to calculate the following formula without - * risk of integer overflow in n: - * n = ( ( n * 6 ) + 7 ) >> 3; - */ - n = ( 6 * ( n >> 3 ) ) + ( ( 6 * ( n & 0x7 ) + 7 ) >> 3 ); - n -= j; - - if( dst == NULL || dlen < n ) - { - *olen = n; - return( MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL ); - } - - for( j = 3, n = x = 0, p = dst; i > 0; i--, src++ ) - { - if( *src == '\r' || *src == '\n' || *src == ' ' ) - continue; - - dec_map_lookup = mbedtls_base64_table_lookup( base64_dec_map, sizeof( base64_dec_map ), *src ); - - mbedtls_base64_cond_assign_uint32( &j, j - 1, mbedtls_base64_eq( dec_map_lookup, 64 ) ); - x = ( x << 6 ) | ( dec_map_lookup & 0x3F ); - - if( ++n == 4 ) - { - n = 0; - if( j > 0 ) *p++ = (unsigned char)( x >> 16 ); - if( j > 1 ) *p++ = (unsigned char)( x >> 8 ); - if( j > 2 ) *p++ = (unsigned char)( x ); - } - } - - *olen = p - dst; - - return( 0 ); -} - -#if defined(MBEDTLS_SELF_TEST) - -static const unsigned char base64_test_dec[64] = -{ - 0x24, 0x48, 0x6E, 0x56, 0x87, 0x62, 0x5A, 0xBD, - 0xBF, 0x17, 0xD9, 0xA2, 0xC4, 0x17, 0x1A, 0x01, - 0x94, 0xED, 0x8F, 0x1E, 0x11, 0xB3, 0xD7, 0x09, - 0x0C, 0xB6, 0xE9, 0x10, 0x6F, 0x22, 0xEE, 0x13, - 0xCA, 0xB3, 0x07, 0x05, 0x76, 0xC9, 0xFA, 0x31, - 0x6C, 0x08, 0x34, 0xFF, 0x8D, 0xC2, 0x6C, 0x38, - 0x00, 0x43, 0xE9, 0x54, 0x97, 0xAF, 0x50, 0x4B, - 0xD1, 0x41, 0xBA, 0x95, 0x31, 0x5A, 0x0B, 0x97 -}; - -static const unsigned char base64_test_enc[] = - "JEhuVodiWr2/F9mixBcaAZTtjx4Rs9cJDLbpEG8i7hPK" - "swcFdsn6MWwINP+Nwmw4AEPpVJevUEvRQbqVMVoLlw=="; - -/* - * Checkup routine - */ -int mbedtls_base64_self_test( int verbose ) -{ - size_t len; - const unsigned char *src; - unsigned char buffer[128]; - - if( verbose != 0 ) - mbedtls_printf( " Base64 encoding test: " ); - - src = base64_test_dec; - - if( mbedtls_base64_encode( buffer, sizeof( buffer ), &len, src, 64 ) != 0 || - memcmp( base64_test_enc, buffer, 88 ) != 0 ) - { - if( verbose != 0 ) - mbedtls_printf( "failed\n" ); - - return( 1 ); - } - - if( verbose != 0 ) - mbedtls_printf( "passed\n Base64 decoding test: " ); - - src = base64_test_enc; - - if( mbedtls_base64_decode( buffer, sizeof( buffer ), &len, src, 88 ) != 0 || - memcmp( base64_test_dec, buffer, 64 ) != 0 ) - { - if( verbose != 0 ) - mbedtls_printf( "failed\n" ); - - return( 1 ); - } - - if( verbose != 0 ) - mbedtls_printf( "passed\n\n" ); - - return( 0 ); -} - -#endif /* MBEDTLS_SELF_TEST */ - -#endif /* MBEDTLS_BASE64_C */ |