1 /*
2 * RFC 1115/1319 compliant MD2 implementation
3 *
4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
5 * SPDX-License-Identifier: Apache-2.0
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
8 * not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 * This file is part of mbed TLS (https://tls.mbed.org)
20 */
21 /*
22 * The MD2 algorithm was designed by Ron Rivest in 1989.
23 *
24 * http://www.ietf.org/rfc/rfc1115.txt
25 * http://www.ietf.org/rfc/rfc1319.txt
26 */
27
28 #if !defined(MBEDTLS_CONFIG_FILE)
29 #include "mbedtls/config.h"
30 #else
31 #include MBEDTLS_CONFIG_FILE
32 #endif
33
34 #if defined(MBEDTLS_MD2_C)
35
36 #include "mbedtls/md2.h"
37 #include "mbedtls/platform_util.h"
38
39 #include <string.h>
40
41 #if defined(MBEDTLS_SELF_TEST)
42 #if defined(MBEDTLS_PLATFORM_C)
43 #include "mbedtls/platform.h"
44 #else
45 #include <stdio.h>
46 #define mbedtls_printf printf
47 #endif /* MBEDTLS_PLATFORM_C */
48 #endif /* MBEDTLS_SELF_TEST */
49
50 #if !defined(MBEDTLS_MD2_ALT)
51
52 static const unsigned char PI_SUBST[256] =
53 {
54 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36,
55 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 0x62, 0xA7, 0x05, 0xF3,
56 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C,
57 0x82, 0xCA, 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
58 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 0xBE, 0x4E,
59 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E,
60 0xBB, 0x2F, 0xEE, 0x7A, 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2,
61 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
62 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E,
63 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 0xFF, 0x19, 0x30, 0xB3,
64 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56,
65 0xAA, 0xC6, 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
66 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 0x45, 0x9D,
67 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65,
68 0xE6, 0x2D, 0xA8, 0x02, 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0,
69 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
70 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C,
71 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 0x2C, 0x53, 0x0D, 0x6E,
72 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81,
73 0x4D, 0x52, 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
74 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 0x78, 0x88,
75 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE,
76 0x3B, 0x00, 0x1D, 0x39, 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58,
77 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
78 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99,
79 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14
80 };
81
mbedtls_md2_init(mbedtls_md2_context * ctx)82 void mbedtls_md2_init( mbedtls_md2_context *ctx )
83 {
84 memset( ctx, 0, sizeof( mbedtls_md2_context ) );
85 }
86
mbedtls_md2_free(mbedtls_md2_context * ctx)87 void mbedtls_md2_free( mbedtls_md2_context *ctx )
88 {
89 if( ctx == NULL )
90 return;
91
92 mbedtls_platform_zeroize( ctx, sizeof( mbedtls_md2_context ) );
93 }
94
mbedtls_md2_clone(mbedtls_md2_context * dst,const mbedtls_md2_context * src)95 void mbedtls_md2_clone( mbedtls_md2_context *dst,
96 const mbedtls_md2_context *src )
97 {
98 *dst = *src;
99 }
100
101 /*
102 * MD2 context setup
103 */
mbedtls_md2_starts_ret(mbedtls_md2_context * ctx)104 int mbedtls_md2_starts_ret( mbedtls_md2_context *ctx )
105 {
106 memset( ctx->cksum, 0, 16 );
107 memset( ctx->state, 0, 46 );
108 memset( ctx->buffer, 0, 16 );
109 ctx->left = 0;
110
111 return( 0 );
112 }
113
114 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
mbedtls_md2_starts(mbedtls_md2_context * ctx)115 void mbedtls_md2_starts( mbedtls_md2_context *ctx )
116 {
117 mbedtls_md2_starts_ret( ctx );
118 }
119 #endif
120
121 #if !defined(MBEDTLS_MD2_PROCESS_ALT)
mbedtls_internal_md2_process(mbedtls_md2_context * ctx)122 int mbedtls_internal_md2_process( mbedtls_md2_context *ctx )
123 {
124 int i, j;
125 unsigned char t = 0;
126
127 for( i = 0; i < 16; i++ )
128 {
129 ctx->state[i + 16] = ctx->buffer[i];
130 ctx->state[i + 32] =
131 (unsigned char)( ctx->buffer[i] ^ ctx->state[i]);
132 }
133
134 for( i = 0; i < 18; i++ )
135 {
136 for( j = 0; j < 48; j++ )
137 {
138 ctx->state[j] = (unsigned char)
139 ( ctx->state[j] ^ PI_SUBST[t] );
140 t = ctx->state[j];
141 }
142
143 t = (unsigned char)( t + i );
144 }
145
146 t = ctx->cksum[15];
147
148 for( i = 0; i < 16; i++ )
149 {
150 ctx->cksum[i] = (unsigned char)
151 ( ctx->cksum[i] ^ PI_SUBST[ctx->buffer[i] ^ t] );
152 t = ctx->cksum[i];
153 }
154
155 return( 0 );
156 }
157
158 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
mbedtls_md2_process(mbedtls_md2_context * ctx)159 void mbedtls_md2_process( mbedtls_md2_context *ctx )
160 {
161 mbedtls_internal_md2_process( ctx );
162 }
163 #endif
164 #endif /* !MBEDTLS_MD2_PROCESS_ALT */
165
166 /*
167 * MD2 process buffer
168 */
mbedtls_md2_update_ret(mbedtls_md2_context * ctx,const unsigned char * input,size_t ilen)169 int mbedtls_md2_update_ret( mbedtls_md2_context *ctx,
170 const unsigned char *input,
171 size_t ilen )
172 {
173 int ret;
174 size_t fill;
175
176 while( ilen > 0 )
177 {
178 if( ilen > 16 - ctx->left )
179 fill = 16 - ctx->left;
180 else
181 fill = ilen;
182
183 memcpy( ctx->buffer + ctx->left, input, fill );
184
185 ctx->left += fill;
186 input += fill;
187 ilen -= fill;
188
189 if( ctx->left == 16 )
190 {
191 ctx->left = 0;
192 if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 )
193 return( ret );
194 }
195 }
196
197 return( 0 );
198 }
199
200 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
mbedtls_md2_update(mbedtls_md2_context * ctx,const unsigned char * input,size_t ilen)201 void mbedtls_md2_update( mbedtls_md2_context *ctx,
202 const unsigned char *input,
203 size_t ilen )
204 {
205 mbedtls_md2_update_ret( ctx, input, ilen );
206 }
207 #endif
208
209 /*
210 * MD2 final digest
211 */
mbedtls_md2_finish_ret(mbedtls_md2_context * ctx,unsigned char output[16])212 int mbedtls_md2_finish_ret( mbedtls_md2_context *ctx,
213 unsigned char output[16] )
214 {
215 int ret;
216 size_t i;
217 unsigned char x;
218
219 x = (unsigned char)( 16 - ctx->left );
220
221 for( i = ctx->left; i < 16; i++ )
222 ctx->buffer[i] = x;
223
224 if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 )
225 return( ret );
226
227 memcpy( ctx->buffer, ctx->cksum, 16 );
228 if( ( ret = mbedtls_internal_md2_process( ctx ) ) != 0 )
229 return( ret );
230
231 memcpy( output, ctx->state, 16 );
232
233 return( 0 );
234 }
235
236 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
mbedtls_md2_finish(mbedtls_md2_context * ctx,unsigned char output[16])237 void mbedtls_md2_finish( mbedtls_md2_context *ctx,
238 unsigned char output[16] )
239 {
240 mbedtls_md2_finish_ret( ctx, output );
241 }
242 #endif
243
244 #endif /* !MBEDTLS_MD2_ALT */
245
246 /*
247 * output = MD2( input buffer )
248 */
mbedtls_md2_ret(const unsigned char * input,size_t ilen,unsigned char output[16])249 int mbedtls_md2_ret( const unsigned char *input,
250 size_t ilen,
251 unsigned char output[16] )
252 {
253 int ret;
254 mbedtls_md2_context ctx;
255
256 mbedtls_md2_init( &ctx );
257
258 if( ( ret = mbedtls_md2_starts_ret( &ctx ) ) != 0 )
259 goto exit;
260
261 if( ( ret = mbedtls_md2_update_ret( &ctx, input, ilen ) ) != 0 )
262 goto exit;
263
264 if( ( ret = mbedtls_md2_finish_ret( &ctx, output ) ) != 0 )
265 goto exit;
266
267 exit:
268 mbedtls_md2_free( &ctx );
269
270 return( ret );
271 }
272
273 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
mbedtls_md2(const unsigned char * input,size_t ilen,unsigned char output[16])274 void mbedtls_md2( const unsigned char *input,
275 size_t ilen,
276 unsigned char output[16] )
277 {
278 mbedtls_md2_ret( input, ilen, output );
279 }
280 #endif
281
282 #if defined(MBEDTLS_SELF_TEST)
283
284 /*
285 * RFC 1319 test vectors
286 */
287 static const unsigned char md2_test_str[7][81] =
288 {
289 { "" },
290 { "a" },
291 { "abc" },
292 { "message digest" },
293 { "abcdefghijklmnopqrstuvwxyz" },
294 { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
295 { "12345678901234567890123456789012345678901234567890123456789012"
296 "345678901234567890" }
297 };
298
299 static const size_t md2_test_strlen[7] =
300 {
301 0, 1, 3, 14, 26, 62, 80
302 };
303
304 static const unsigned char md2_test_sum[7][16] =
305 {
306 { 0x83, 0x50, 0xE5, 0xA3, 0xE2, 0x4C, 0x15, 0x3D,
307 0xF2, 0x27, 0x5C, 0x9F, 0x80, 0x69, 0x27, 0x73 },
308 { 0x32, 0xEC, 0x01, 0xEC, 0x4A, 0x6D, 0xAC, 0x72,
309 0xC0, 0xAB, 0x96, 0xFB, 0x34, 0xC0, 0xB5, 0xD1 },
310 { 0xDA, 0x85, 0x3B, 0x0D, 0x3F, 0x88, 0xD9, 0x9B,
311 0x30, 0x28, 0x3A, 0x69, 0xE6, 0xDE, 0xD6, 0xBB },
312 { 0xAB, 0x4F, 0x49, 0x6B, 0xFB, 0x2A, 0x53, 0x0B,
313 0x21, 0x9F, 0xF3, 0x30, 0x31, 0xFE, 0x06, 0xB0 },
314 { 0x4E, 0x8D, 0xDF, 0xF3, 0x65, 0x02, 0x92, 0xAB,
315 0x5A, 0x41, 0x08, 0xC3, 0xAA, 0x47, 0x94, 0x0B },
316 { 0xDA, 0x33, 0xDE, 0xF2, 0xA4, 0x2D, 0xF1, 0x39,
317 0x75, 0x35, 0x28, 0x46, 0xC3, 0x03, 0x38, 0xCD },
318 { 0xD5, 0x97, 0x6F, 0x79, 0xD8, 0x3D, 0x3A, 0x0D,
319 0xC9, 0x80, 0x6C, 0x3C, 0x66, 0xF3, 0xEF, 0xD8 }
320 };
321
322 /*
323 * Checkup routine
324 */
mbedtls_md2_self_test(int verbose)325 int mbedtls_md2_self_test( int verbose )
326 {
327 int i, ret = 0;
328 unsigned char md2sum[16];
329
330 for( i = 0; i < 7; i++ )
331 {
332 if( verbose != 0 )
333 mbedtls_printf( " MD2 test #%d: ", i + 1 );
334
335 ret = mbedtls_md2_ret( md2_test_str[i], md2_test_strlen[i], md2sum );
336 if( ret != 0 )
337 goto fail;
338
339 if( memcmp( md2sum, md2_test_sum[i], 16 ) != 0 )
340 {
341 ret = 1;
342 goto fail;
343 }
344
345 if( verbose != 0 )
346 mbedtls_printf( "passed\n" );
347 }
348
349 if( verbose != 0 )
350 mbedtls_printf( "\n" );
351
352 return( 0 );
353
354 fail:
355 if( verbose != 0 )
356 mbedtls_printf( "failed\n" );
357
358 return( ret );
359 }
360
361 #endif /* MBEDTLS_SELF_TEST */
362
363 #endif /* MBEDTLS_MD2_C */
364