[398] | 1 | /*
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| 2 | * RFC 1115/1319 compliant MD2 implementation
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| 3 | *
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| 4 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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| 5 | * SPDX-License-Identifier: Apache-2.0
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| 6 | *
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| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
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| 8 | * not use this file except in compliance with the License.
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| 9 | * You may obtain a copy of the License at
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| 10 | *
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| 11 | * http://www.apache.org/licenses/LICENSE-2.0
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| 12 | *
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| 13 | * Unless required by applicable law or agreed to in writing, software
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| 14 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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| 15 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 16 | * See the License for the specific language governing permissions and
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| 17 | * limitations under the License.
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| 18 | *
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| 19 | * This file is part of mbed TLS (https://tls.mbed.org)
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| 20 | */
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| 21 | /*
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| 22 | * The MD2 algorithm was designed by Ron Rivest in 1989.
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| 23 | *
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| 24 | * http://www.ietf.org/rfc/rfc1115.txt
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| 25 | * http://www.ietf.org/rfc/rfc1319.txt
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| 26 | */
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| 27 |
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| 28 | #if !defined(MBEDTLS_CONFIG_FILE)
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| 29 | #include "mbedtls/config.h"
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| 30 | #else
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| 31 | #include MBEDTLS_CONFIG_FILE
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| 32 | #endif
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| 33 |
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| 34 | #if defined(MBEDTLS_MD2_C)
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| 35 |
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| 36 | #include "mbedtls/md2.h"
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| 37 | #include "mbedtls/platform_util.h"
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| 38 |
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| 39 | #include <string.h>
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| 40 |
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| 41 | #if defined(MBEDTLS_SELF_TEST)
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| 42 | #if defined(MBEDTLS_PLATFORM_C)
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| 43 | #include "mbedtls/platform.h"
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| 44 | #else
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| 45 | #include <stdio.h>
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| 46 | #define mbedtls_printf printf
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| 47 | #endif /* MBEDTLS_PLATFORM_C */
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| 48 | #endif /* MBEDTLS_SELF_TEST */
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| 49 |
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| 50 | #if !defined(MBEDTLS_MD2_ALT)
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| 51 |
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| 52 | static const unsigned char PI_SUBST[256] =
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| 53 | {
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| 54 | 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36,
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| 55 | 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 0x62, 0xA7, 0x05, 0xF3,
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| 56 | 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C,
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| 57 | 0x82, 0xCA, 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
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| 58 | 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 0xBE, 0x4E,
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| 59 | 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E,
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| 60 | 0xBB, 0x2F, 0xEE, 0x7A, 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2,
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| 61 | 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
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| 62 | 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E,
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| 63 | 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 0xFF, 0x19, 0x30, 0xB3,
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| 64 | 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56,
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| 65 | 0xAA, 0xC6, 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
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| 66 | 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 0x45, 0x9D,
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| 67 | 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65,
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| 68 | 0xE6, 0x2D, 0xA8, 0x02, 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0,
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| 69 | 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
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| 70 | 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C,
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| 71 | 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 0x2C, 0x53, 0x0D, 0x6E,
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| 72 | 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81,
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| 73 | 0x4D, 0x52, 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
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| 74 | 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 0x78, 0x88,
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| 75 | 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE,
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| 76 | 0x3B, 0x00, 0x1D, 0x39, 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58,
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| 77 | 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
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| 78 | 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99,
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| 79 | 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14
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| 80 | };
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| 81 |
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| 82 | void mbedtls_md2_init( mbedtls_md2_context *ctx )
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| 83 | {
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| 84 | memset( ctx, 0, sizeof( mbedtls_md2_context ) );
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| 85 | }
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| 86 |
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| 87 | void mbedtls_md2_free( mbedtls_md2_context *ctx )
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| 88 | {
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| 89 | if( ctx == NULL )
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| 90 | return;
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| 91 |
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| 92 | mbedtls_platform_zeroize( ctx, sizeof( mbedtls_md2_context ) );
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| 93 | }
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| 94 |
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| 95 | void mbedtls_md2_clone( mbedtls_md2_context *dst,
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| 96 | const mbedtls_md2_context *src )
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| 97 | {
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| 98 | *dst = *src;
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| 99 | }
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| 100 |
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| 101 | /*
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| 102 | * MD2 context setup
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| 103 | */
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| 104 | int mbedtls_md2_starts_ret( mbedtls_md2_context *ctx )
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| 105 | {
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| 106 | memset( ctx->cksum, 0, 16 );
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| 107 | memset( ctx->state, 0, 46 );
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| 108 | memset( ctx->buffer, 0, 16 );
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| 109 | ctx->left = 0;
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| 110 |
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| 111 | return( 0 );
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| 112 | }
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| 113 |
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| 114 | #if !defined(MBEDTLS_DEPRECATED_REMOVED)
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| 115 | void mbedtls_md2_starts( mbedtls_md2_context *ctx )
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| 116 | {
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| 117 | mbedtls_md2_starts_ret( ctx );
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| 118 | }
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| 119 | #endif
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| 120 |
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| 121 | #if !defined(MBEDTLS_MD2_PROCESS_ALT)
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| 122 | int mbedtls_internal_md2_process( mbedtls_md2_context *ctx )
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| 123 | {
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| 124 | int i, j;
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| 125 | unsigned char t = 0;
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| 126 |
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| 127 | for( i = 0; i < 16; i++ )
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| 128 | {
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| 129 | ctx->state[i + 16] = ctx->buffer[i];
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| 130 | ctx->state[i + 32] =
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| 131 | (unsigned char)( ctx->buffer[i] ^ ctx->state[i]);
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| 132 | }
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| 133 |
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| 134 | for( i = 0; i < 18; i++ )
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| 135 | {
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| 136 | for( j = 0; j < 48; j++ )
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| 137 | {
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| 138 | ctx->state[j] = (unsigned char)
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| 139 | ( ctx->state[j] ^ PI_SUBST[t] );
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| 140 | t = ctx->state[j];
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| 141 | }
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| 142 |
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| 143 | t = (unsigned char)( t + i );
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| 144 | }
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| 145 |
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| 146 | t = ctx->cksum[15];
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| 147 |
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| 148 | for( i = 0; i < 16; i++ )
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| 149 | {
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| 150 | ctx->cksum[i] = (unsigned char)
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| 151 | ( ctx->cksum[i] ^ PI_SUBST[ctx->buffer[i] ^ t] );
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| 152 | t = ctx->cksum[i];
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| 153 | }
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| 154 |
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| 155 | return( 0 );
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| 156 | }
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| 157 |
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| 158 | #if !defined(MBEDTLS_DEPRECATED_REMOVED)
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| 159 | void mbedtls_md2_process( mbedtls_md2_context *ctx )
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| 160 | {
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| 161 | mbedtls_internal_md2_process( ctx );
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| 162 | }
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| 163 | #endif
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| 164 | #endif /* !MBEDTLS_MD2_PROCESS_ALT */
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| 165 |
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| 166 | /*
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| 167 | * MD2 process buffer
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| 168 | */
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| 169 | int mbedtls_md2_update_ret( mbedtls_md2_context *ctx,
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| 170 | const unsigned char *input,
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| 171 | size_t ilen )
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| 172 | {
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| 173 | int ret;
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| 174 | size_t fill;
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| 175 |
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| 176 | while( ilen > 0 )
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| 177 | {
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| 178 | if( ilen > 16 - ctx->left )
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| 179 | fill = 16 - ctx->left;
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| 180 | else
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| 181 | fill = ilen;
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| 182 |
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| 183 | memcpy( ctx->buffer + ctx->left, input, fill );
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| 184 |
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| 185 | ctx->left += fill;
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| 186 | input += fill;
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| 187 | ilen -= fill;
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| 188 |
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| 189 | if( ctx->left == 16 )
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| 190 | {
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| 191 | ctx->left = 0;
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| 192 | if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 )
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| 193 | return( ret );
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| 194 | }
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| 195 | }
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| 196 |
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| 197 | return( 0 );
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| 198 | }
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| 199 |
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| 200 | #if !defined(MBEDTLS_DEPRECATED_REMOVED)
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| 201 | void mbedtls_md2_update( mbedtls_md2_context *ctx,
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| 202 | const unsigned char *input,
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| 203 | size_t ilen )
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| 204 | {
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| 205 | mbedtls_md2_update_ret( ctx, input, ilen );
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| 206 | }
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| 207 | #endif
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| 208 |
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| 209 | /*
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| 210 | * MD2 final digest
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| 211 | */
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| 212 | int mbedtls_md2_finish_ret( mbedtls_md2_context *ctx,
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| 213 | unsigned char output[16] )
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| 214 | {
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| 215 | int ret;
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| 216 | size_t i;
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| 217 | unsigned char x;
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| 218 |
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| 219 | x = (unsigned char)( 16 - ctx->left );
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| 220 |
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| 221 | for( i = ctx->left; i < 16; i++ )
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| 222 | ctx->buffer[i] = x;
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| 223 |
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| 224 | if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 )
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| 225 | return( ret );
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| 226 |
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| 227 | memcpy( ctx->buffer, ctx->cksum, 16 );
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| 228 | if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 )
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| 229 | return( ret );
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| 230 |
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| 231 | memcpy( output, ctx->state, 16 );
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| 232 |
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| 233 | return( 0 );
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| 234 | }
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| 235 |
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| 236 | #if !defined(MBEDTLS_DEPRECATED_REMOVED)
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| 237 | void mbedtls_md2_finish( mbedtls_md2_context *ctx,
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| 238 | unsigned char output[16] )
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| 239 | {
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| 240 | mbedtls_md2_finish_ret( ctx, output );
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| 241 | }
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| 242 | #endif
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| 243 |
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| 244 | #endif /* !MBEDTLS_MD2_ALT */
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| 245 |
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| 246 | /*
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| 247 | * output = MD2( input buffer )
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| 248 | */
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| 249 | int mbedtls_md2_ret( const unsigned char *input,
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| 250 | size_t ilen,
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| 251 | unsigned char output[16] )
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| 252 | {
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| 253 | int ret;
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| 254 | mbedtls_md2_context ctx;
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| 255 |
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| 256 | mbedtls_md2_init( &ctx );
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| 257 |
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| 258 | if( ( ret = mbedtls_md2_starts_ret( &ctx ) ) != 0 )
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| 259 | goto exit;
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| 260 |
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| 261 | if( ( ret = mbedtls_md2_update_ret( &ctx, input, ilen ) ) != 0 )
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| 262 | goto exit;
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| 263 |
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| 264 | if( ( ret = mbedtls_md2_finish_ret( &ctx, output ) ) != 0 )
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| 265 | goto exit;
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| 266 |
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| 267 | exit:
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| 268 | mbedtls_md2_free( &ctx );
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| 269 |
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| 270 | return( ret );
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| 271 | }
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| 272 |
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| 273 | #if !defined(MBEDTLS_DEPRECATED_REMOVED)
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| 274 | void mbedtls_md2( const unsigned char *input,
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| 275 | size_t ilen,
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| 276 | unsigned char output[16] )
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| 277 | {
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| 278 | mbedtls_md2_ret( input, ilen, output );
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| 279 | }
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| 280 | #endif
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| 281 |
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| 282 | #if defined(MBEDTLS_SELF_TEST)
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| 283 |
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| 284 | /*
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| 285 | * RFC 1319 test vectors
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| 286 | */
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| 287 | static const unsigned char md2_test_str[7][81] =
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| 288 | {
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| 289 | { "" },
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| 290 | { "a" },
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| 291 | { "abc" },
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| 292 | { "message digest" },
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| 293 | { "abcdefghijklmnopqrstuvwxyz" },
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| 294 | { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
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| 295 | { "12345678901234567890123456789012345678901234567890123456789012"
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| 296 | "345678901234567890" }
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| 297 | };
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| 298 |
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| 299 | static const size_t md2_test_strlen[7] =
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| 300 | {
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| 301 | 0, 1, 3, 14, 26, 62, 80
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| 302 | };
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| 303 |
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| 304 | static const unsigned char md2_test_sum[7][16] =
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| 305 | {
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| 306 | { 0x83, 0x50, 0xE5, 0xA3, 0xE2, 0x4C, 0x15, 0x3D,
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| 307 | 0xF2, 0x27, 0x5C, 0x9F, 0x80, 0x69, 0x27, 0x73 },
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| 308 | { 0x32, 0xEC, 0x01, 0xEC, 0x4A, 0x6D, 0xAC, 0x72,
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| 309 | 0xC0, 0xAB, 0x96, 0xFB, 0x34, 0xC0, 0xB5, 0xD1 },
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| 310 | { 0xDA, 0x85, 0x3B, 0x0D, 0x3F, 0x88, 0xD9, 0x9B,
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| 311 | 0x30, 0x28, 0x3A, 0x69, 0xE6, 0xDE, 0xD6, 0xBB },
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| 312 | { 0xAB, 0x4F, 0x49, 0x6B, 0xFB, 0x2A, 0x53, 0x0B,
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| 313 | 0x21, 0x9F, 0xF3, 0x30, 0x31, 0xFE, 0x06, 0xB0 },
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| 314 | { 0x4E, 0x8D, 0xDF, 0xF3, 0x65, 0x02, 0x92, 0xAB,
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| 315 | 0x5A, 0x41, 0x08, 0xC3, 0xAA, 0x47, 0x94, 0x0B },
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| 316 | { 0xDA, 0x33, 0xDE, 0xF2, 0xA4, 0x2D, 0xF1, 0x39,
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| 317 | 0x75, 0x35, 0x28, 0x46, 0xC3, 0x03, 0x38, 0xCD },
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| 318 | { 0xD5, 0x97, 0x6F, 0x79, 0xD8, 0x3D, 0x3A, 0x0D,
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| 319 | 0xC9, 0x80, 0x6C, 0x3C, 0x66, 0xF3, 0xEF, 0xD8 }
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| 320 | };
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| 321 |
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| 322 | /*
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| 323 | * Checkup routine
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| 324 | */
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| 325 | int mbedtls_md2_self_test( int verbose )
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| 326 | {
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| 327 | int i, ret = 0;
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| 328 | unsigned char md2sum[16];
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| 329 |
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| 330 | for( i = 0; i < 7; i++ )
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| 331 | {
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| 332 | if( verbose != 0 )
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| 333 | mbedtls_printf( " MD2 test #%d: ", i + 1 );
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| 334 |
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| 335 | ret = mbedtls_md2_ret( md2_test_str[i], md2_test_strlen[i], md2sum );
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| 336 | if( ret != 0 )
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| 337 | goto fail;
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| 338 |
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| 339 | if( memcmp( md2sum, md2_test_sum[i], 16 ) != 0 )
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| 340 | {
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| 341 | ret = 1;
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| 342 | goto fail;
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| 343 | }
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| 344 |
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| 345 | if( verbose != 0 )
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| 346 | mbedtls_printf( "passed\n" );
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| 347 | }
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| 348 |
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| 349 | if( verbose != 0 )
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| 350 | mbedtls_printf( "\n" );
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| 351 |
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| 352 | return( 0 );
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| 353 |
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| 354 | fail:
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| 355 | if( verbose != 0 )
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| 356 | mbedtls_printf( "failed\n" );
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| 357 |
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| 358 | return( ret );
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| 359 | }
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| 360 |
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| 361 | #endif /* MBEDTLS_SELF_TEST */
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| 362 |
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| 363 | #endif /* MBEDTLS_MD2_C */
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