/* * RFC 1115/1319 compliant MD2 implementation * * 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. */ /* * The MD2 algorithm was designed by Ron Rivest in 1989. * * http://www.ietf.org/rfc/rfc1115.txt * http://www.ietf.org/rfc/rfc1319.txt */ #include "common.h" #if defined(MBEDTLS_MD2_C) #include "mbedtls/md2.h" #include "mbedtls/platform_util.h" #include "mbedtls/error.h" #include <string.h> #if defined(MBEDTLS_SELF_TEST) #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 */ #if !defined(MBEDTLS_MD2_ALT) static const unsigned char PI_SUBST[256] = { 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA, 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16, 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A, 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21, 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6, 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6, 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02, 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F, 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52, 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA, 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39, 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A, 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14 }; void mbedtls_md2_init( mbedtls_md2_context *ctx ) { memset( ctx, 0, sizeof( mbedtls_md2_context ) ); } void mbedtls_md2_free( mbedtls_md2_context *ctx ) { if( ctx == NULL ) return; mbedtls_platform_zeroize( ctx, sizeof( mbedtls_md2_context ) ); } void mbedtls_md2_clone( mbedtls_md2_context *dst, const mbedtls_md2_context *src ) { *dst = *src; } /* * MD2 context setup */ int mbedtls_md2_starts_ret( mbedtls_md2_context *ctx ) { memset( ctx->cksum, 0, 16 ); memset( ctx->state, 0, 46 ); memset( ctx->buffer, 0, 16 ); ctx->left = 0; return( 0 ); } #if !defined(MBEDTLS_DEPRECATED_REMOVED) void mbedtls_md2_starts( mbedtls_md2_context *ctx ) { mbedtls_md2_starts_ret( ctx ); } #endif #if !defined(MBEDTLS_MD2_PROCESS_ALT) int mbedtls_internal_md2_process( mbedtls_md2_context *ctx ) { int i, j; unsigned char t = 0; for( i = 0; i < 16; i++ ) { ctx->state[i + 16] = ctx->buffer[i]; ctx->state[i + 32] = (unsigned char)( ctx->buffer[i] ^ ctx->state[i]); } for( i = 0; i < 18; i++ ) { for( j = 0; j < 48; j++ ) { ctx->state[j] = (unsigned char) ( ctx->state[j] ^ PI_SUBST[t] ); t = ctx->state[j]; } t = (unsigned char)( t + i ); } t = ctx->cksum[15]; for( i = 0; i < 16; i++ ) { ctx->cksum[i] = (unsigned char) ( ctx->cksum[i] ^ PI_SUBST[ctx->buffer[i] ^ t] ); t = ctx->cksum[i]; } /* Zeroise variables to clear sensitive data from memory. */ mbedtls_platform_zeroize( &t, sizeof( t ) ); return( 0 ); } #if !defined(MBEDTLS_DEPRECATED_REMOVED) void mbedtls_md2_process( mbedtls_md2_context *ctx ) { mbedtls_internal_md2_process( ctx ); } #endif #endif /* !MBEDTLS_MD2_PROCESS_ALT */ /* * MD2 process buffer */ int mbedtls_md2_update_ret( mbedtls_md2_context *ctx, const unsigned char *input, size_t ilen ) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t fill; while( ilen > 0 ) { if( ilen > 16 - ctx->left ) fill = 16 - ctx->left; else fill = ilen; memcpy( ctx->buffer + ctx->left, input, fill ); ctx->left += fill; input += fill; ilen -= fill; if( ctx->left == 16 ) { ctx->left = 0; if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 ) return( ret ); } } return( 0 ); } #if !defined(MBEDTLS_DEPRECATED_REMOVED) void mbedtls_md2_update( mbedtls_md2_context *ctx, const unsigned char *input, size_t ilen ) { mbedtls_md2_update_ret( ctx, input, ilen ); } #endif /* * MD2 final digest */ int mbedtls_md2_finish_ret( mbedtls_md2_context *ctx, unsigned char output[16] ) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t i; unsigned char x; x = (unsigned char)( 16 - ctx->left ); for( i = ctx->left; i < 16; i++ ) ctx->buffer[i] = x; if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 ) return( ret ); memcpy( ctx->buffer, ctx->cksum, 16 ); if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 ) return( ret ); memcpy( output, ctx->state, 16 ); return( 0 ); } #if !defined(MBEDTLS_DEPRECATED_REMOVED) void mbedtls_md2_finish( mbedtls_md2_context *ctx, unsigned char output[16] ) { mbedtls_md2_finish_ret( ctx, output ); } #endif #endif /* !MBEDTLS_MD2_ALT */ /* * output = MD2( input buffer ) */ int mbedtls_md2_ret( const unsigned char *input, size_t ilen, unsigned char output[16] ) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; mbedtls_md2_context ctx; mbedtls_md2_init( &ctx ); if( ( ret = mbedtls_md2_starts_ret( &ctx ) ) != 0 ) goto exit; if( ( ret = mbedtls_md2_update_ret( &ctx, input, ilen ) ) != 0 ) goto exit; if( ( ret = mbedtls_md2_finish_ret( &ctx, output ) ) != 0 ) goto exit; exit: mbedtls_md2_free( &ctx ); return( ret ); } #if !defined(MBEDTLS_DEPRECATED_REMOVED) void mbedtls_md2( const unsigned char *input, size_t ilen, unsigned char output[16] ) { mbedtls_md2_ret( input, ilen, output ); } #endif #if defined(MBEDTLS_SELF_TEST) /* * RFC 1319 test vectors */ static const unsigned char md2_test_str[7][81] = { { "" }, { "a" }, { "abc" }, { "message digest" }, { "abcdefghijklmnopqrstuvwxyz" }, { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" }, { "12345678901234567890123456789012345678901234567890123456789012345678901234567890" } }; static const size_t md2_test_strlen[7] = { 0, 1, 3, 14, 26, 62, 80 }; static const unsigned char md2_test_sum[7][16] = { { 0x83, 0x50, 0xE5, 0xA3, 0xE2, 0x4C, 0x15, 0x3D, 0xF2, 0x27, 0x5C, 0x9F, 0x80, 0x69, 0x27, 0x73 }, { 0x32, 0xEC, 0x01, 0xEC, 0x4A, 0x6D, 0xAC, 0x72, 0xC0, 0xAB, 0x96, 0xFB, 0x34, 0xC0, 0xB5, 0xD1 }, { 0xDA, 0x85, 0x3B, 0x0D, 0x3F, 0x88, 0xD9, 0x9B, 0x30, 0x28, 0x3A, 0x69, 0xE6, 0xDE, 0xD6, 0xBB }, { 0xAB, 0x4F, 0x49, 0x6B, 0xFB, 0x2A, 0x53, 0x0B, 0x21, 0x9F, 0xF3, 0x30, 0x31, 0xFE, 0x06, 0xB0 }, { 0x4E, 0x8D, 0xDF, 0xF3, 0x65, 0x02, 0x92, 0xAB, 0x5A, 0x41, 0x08, 0xC3, 0xAA, 0x47, 0x94, 0x0B }, { 0xDA, 0x33, 0xDE, 0xF2, 0xA4, 0x2D, 0xF1, 0x39, 0x75, 0x35, 0x28, 0x46, 0xC3, 0x03, 0x38, 0xCD }, { 0xD5, 0x97, 0x6F, 0x79, 0xD8, 0x3D, 0x3A, 0x0D, 0xC9, 0x80, 0x6C, 0x3C, 0x66, 0xF3, 0xEF, 0xD8 } }; /* * Checkup routine */ int mbedtls_md2_self_test( int verbose ) { int i, ret = 0; unsigned char md2sum[16]; for( i = 0; i < 7; i++ ) { if( verbose != 0 ) mbedtls_printf( " MD2 test #%d: ", i + 1 ); ret = mbedtls_md2_ret( md2_test_str[i], md2_test_strlen[i], md2sum ); if( ret != 0 ) goto fail; if( memcmp( md2sum, md2_test_sum[i], 16 ) != 0 ) { ret = 1; goto fail; } if( verbose != 0 ) mbedtls_printf( "passed\n" ); } if( verbose != 0 ) mbedtls_printf( "\n" ); return( 0 ); fail: if( verbose != 0 ) mbedtls_printf( "failed\n" ); return( ret ); } #endif /* MBEDTLS_SELF_TEST */ #endif /* MBEDTLS_MD2_C */