1 /*
2 * RFC 1321 compliant MD5 implementation
3 *
4 * Copyright The Mbed TLS Contributors
5 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
6 */
7 /*
8 * The MD5 algorithm was designed by Ron Rivest in 1991.
9 *
10 * http://www.ietf.org/rfc/rfc1321.txt
11 */
12
13 #include "common.h"
14
15 #if defined(MBEDTLS_MD5_C)
16
17 #include "mbedtls/md5.h"
18 #include "mbedtls/platform_util.h"
19 #include "mbedtls/error.h"
20
21 #include <string.h>
22
23 #include "mbedtls/platform.h"
24
25 #if !defined(MBEDTLS_MD5_ALT)
26
mbedtls_md5_init(mbedtls_md5_context * ctx)27 void mbedtls_md5_init(mbedtls_md5_context *ctx)
28 {
29 memset(ctx, 0, sizeof(mbedtls_md5_context));
30 }
31
mbedtls_md5_free(mbedtls_md5_context * ctx)32 void mbedtls_md5_free(mbedtls_md5_context *ctx)
33 {
34 if (ctx == NULL) {
35 return;
36 }
37
38 mbedtls_platform_zeroize(ctx, sizeof(mbedtls_md5_context));
39 }
40
mbedtls_md5_clone(mbedtls_md5_context * dst,const mbedtls_md5_context * src)41 void mbedtls_md5_clone(mbedtls_md5_context *dst,
42 const mbedtls_md5_context *src)
43 {
44 *dst = *src;
45 }
46
47 /*
48 * MD5 context setup
49 */
mbedtls_md5_starts(mbedtls_md5_context * ctx)50 int mbedtls_md5_starts(mbedtls_md5_context *ctx)
51 {
52 ctx->total[0] = 0;
53 ctx->total[1] = 0;
54
55 ctx->state[0] = 0x67452301;
56 ctx->state[1] = 0xEFCDAB89;
57 ctx->state[2] = 0x98BADCFE;
58 ctx->state[3] = 0x10325476;
59
60 return 0;
61 }
62
63 #if !defined(MBEDTLS_MD5_PROCESS_ALT)
mbedtls_internal_md5_process(mbedtls_md5_context * ctx,const unsigned char data[64])64 int mbedtls_internal_md5_process(mbedtls_md5_context *ctx,
65 const unsigned char data[64])
66 {
67 struct {
68 uint32_t X[16], A, B, C, D;
69 } local;
70
71 local.X[0] = MBEDTLS_GET_UINT32_LE(data, 0);
72 local.X[1] = MBEDTLS_GET_UINT32_LE(data, 4);
73 local.X[2] = MBEDTLS_GET_UINT32_LE(data, 8);
74 local.X[3] = MBEDTLS_GET_UINT32_LE(data, 12);
75 local.X[4] = MBEDTLS_GET_UINT32_LE(data, 16);
76 local.X[5] = MBEDTLS_GET_UINT32_LE(data, 20);
77 local.X[6] = MBEDTLS_GET_UINT32_LE(data, 24);
78 local.X[7] = MBEDTLS_GET_UINT32_LE(data, 28);
79 local.X[8] = MBEDTLS_GET_UINT32_LE(data, 32);
80 local.X[9] = MBEDTLS_GET_UINT32_LE(data, 36);
81 local.X[10] = MBEDTLS_GET_UINT32_LE(data, 40);
82 local.X[11] = MBEDTLS_GET_UINT32_LE(data, 44);
83 local.X[12] = MBEDTLS_GET_UINT32_LE(data, 48);
84 local.X[13] = MBEDTLS_GET_UINT32_LE(data, 52);
85 local.X[14] = MBEDTLS_GET_UINT32_LE(data, 56);
86 local.X[15] = MBEDTLS_GET_UINT32_LE(data, 60);
87
88 #define S(x, n) \
89 (((x) << (n)) | (((x) & 0xFFFFFFFF) >> (32 - (n))))
90
91 #define P(a, b, c, d, k, s, t) \
92 do \
93 { \
94 (a) += F((b), (c), (d)) + local.X[(k)] + (t); \
95 (a) = S((a), (s)) + (b); \
96 } while (0)
97
98 local.A = ctx->state[0];
99 local.B = ctx->state[1];
100 local.C = ctx->state[2];
101 local.D = ctx->state[3];
102
103 #define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
104
105 P(local.A, local.B, local.C, local.D, 0, 7, 0xD76AA478);
106 P(local.D, local.A, local.B, local.C, 1, 12, 0xE8C7B756);
107 P(local.C, local.D, local.A, local.B, 2, 17, 0x242070DB);
108 P(local.B, local.C, local.D, local.A, 3, 22, 0xC1BDCEEE);
109 P(local.A, local.B, local.C, local.D, 4, 7, 0xF57C0FAF);
110 P(local.D, local.A, local.B, local.C, 5, 12, 0x4787C62A);
111 P(local.C, local.D, local.A, local.B, 6, 17, 0xA8304613);
112 P(local.B, local.C, local.D, local.A, 7, 22, 0xFD469501);
113 P(local.A, local.B, local.C, local.D, 8, 7, 0x698098D8);
114 P(local.D, local.A, local.B, local.C, 9, 12, 0x8B44F7AF);
115 P(local.C, local.D, local.A, local.B, 10, 17, 0xFFFF5BB1);
116 P(local.B, local.C, local.D, local.A, 11, 22, 0x895CD7BE);
117 P(local.A, local.B, local.C, local.D, 12, 7, 0x6B901122);
118 P(local.D, local.A, local.B, local.C, 13, 12, 0xFD987193);
119 P(local.C, local.D, local.A, local.B, 14, 17, 0xA679438E);
120 P(local.B, local.C, local.D, local.A, 15, 22, 0x49B40821);
121
122 #undef F
123
124 #define F(x, y, z) ((y) ^ ((z) & ((x) ^ (y))))
125
126 P(local.A, local.B, local.C, local.D, 1, 5, 0xF61E2562);
127 P(local.D, local.A, local.B, local.C, 6, 9, 0xC040B340);
128 P(local.C, local.D, local.A, local.B, 11, 14, 0x265E5A51);
129 P(local.B, local.C, local.D, local.A, 0, 20, 0xE9B6C7AA);
130 P(local.A, local.B, local.C, local.D, 5, 5, 0xD62F105D);
131 P(local.D, local.A, local.B, local.C, 10, 9, 0x02441453);
132 P(local.C, local.D, local.A, local.B, 15, 14, 0xD8A1E681);
133 P(local.B, local.C, local.D, local.A, 4, 20, 0xE7D3FBC8);
134 P(local.A, local.B, local.C, local.D, 9, 5, 0x21E1CDE6);
135 P(local.D, local.A, local.B, local.C, 14, 9, 0xC33707D6);
136 P(local.C, local.D, local.A, local.B, 3, 14, 0xF4D50D87);
137 P(local.B, local.C, local.D, local.A, 8, 20, 0x455A14ED);
138 P(local.A, local.B, local.C, local.D, 13, 5, 0xA9E3E905);
139 P(local.D, local.A, local.B, local.C, 2, 9, 0xFCEFA3F8);
140 P(local.C, local.D, local.A, local.B, 7, 14, 0x676F02D9);
141 P(local.B, local.C, local.D, local.A, 12, 20, 0x8D2A4C8A);
142
143 #undef F
144
145 #define F(x, y, z) ((x) ^ (y) ^ (z))
146
147 P(local.A, local.B, local.C, local.D, 5, 4, 0xFFFA3942);
148 P(local.D, local.A, local.B, local.C, 8, 11, 0x8771F681);
149 P(local.C, local.D, local.A, local.B, 11, 16, 0x6D9D6122);
150 P(local.B, local.C, local.D, local.A, 14, 23, 0xFDE5380C);
151 P(local.A, local.B, local.C, local.D, 1, 4, 0xA4BEEA44);
152 P(local.D, local.A, local.B, local.C, 4, 11, 0x4BDECFA9);
153 P(local.C, local.D, local.A, local.B, 7, 16, 0xF6BB4B60);
154 P(local.B, local.C, local.D, local.A, 10, 23, 0xBEBFBC70);
155 P(local.A, local.B, local.C, local.D, 13, 4, 0x289B7EC6);
156 P(local.D, local.A, local.B, local.C, 0, 11, 0xEAA127FA);
157 P(local.C, local.D, local.A, local.B, 3, 16, 0xD4EF3085);
158 P(local.B, local.C, local.D, local.A, 6, 23, 0x04881D05);
159 P(local.A, local.B, local.C, local.D, 9, 4, 0xD9D4D039);
160 P(local.D, local.A, local.B, local.C, 12, 11, 0xE6DB99E5);
161 P(local.C, local.D, local.A, local.B, 15, 16, 0x1FA27CF8);
162 P(local.B, local.C, local.D, local.A, 2, 23, 0xC4AC5665);
163
164 #undef F
165
166 #define F(x, y, z) ((y) ^ ((x) | ~(z)))
167
168 P(local.A, local.B, local.C, local.D, 0, 6, 0xF4292244);
169 P(local.D, local.A, local.B, local.C, 7, 10, 0x432AFF97);
170 P(local.C, local.D, local.A, local.B, 14, 15, 0xAB9423A7);
171 P(local.B, local.C, local.D, local.A, 5, 21, 0xFC93A039);
172 P(local.A, local.B, local.C, local.D, 12, 6, 0x655B59C3);
173 P(local.D, local.A, local.B, local.C, 3, 10, 0x8F0CCC92);
174 P(local.C, local.D, local.A, local.B, 10, 15, 0xFFEFF47D);
175 P(local.B, local.C, local.D, local.A, 1, 21, 0x85845DD1);
176 P(local.A, local.B, local.C, local.D, 8, 6, 0x6FA87E4F);
177 P(local.D, local.A, local.B, local.C, 15, 10, 0xFE2CE6E0);
178 P(local.C, local.D, local.A, local.B, 6, 15, 0xA3014314);
179 P(local.B, local.C, local.D, local.A, 13, 21, 0x4E0811A1);
180 P(local.A, local.B, local.C, local.D, 4, 6, 0xF7537E82);
181 P(local.D, local.A, local.B, local.C, 11, 10, 0xBD3AF235);
182 P(local.C, local.D, local.A, local.B, 2, 15, 0x2AD7D2BB);
183 P(local.B, local.C, local.D, local.A, 9, 21, 0xEB86D391);
184
185 #undef F
186
187 ctx->state[0] += local.A;
188 ctx->state[1] += local.B;
189 ctx->state[2] += local.C;
190 ctx->state[3] += local.D;
191
192 /* Zeroise variables to clear sensitive data from memory. */
193 mbedtls_platform_zeroize(&local, sizeof(local));
194
195 return 0;
196 }
197
198 #endif /* !MBEDTLS_MD5_PROCESS_ALT */
199
200 /*
201 * MD5 process buffer
202 */
mbedtls_md5_update(mbedtls_md5_context * ctx,const unsigned char * input,size_t ilen)203 int mbedtls_md5_update(mbedtls_md5_context *ctx,
204 const unsigned char *input,
205 size_t ilen)
206 {
207 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
208 size_t fill;
209 uint32_t left;
210
211 if (ilen == 0) {
212 return 0;
213 }
214
215 left = ctx->total[0] & 0x3F;
216 fill = 64 - left;
217
218 ctx->total[0] += (uint32_t) ilen;
219 ctx->total[0] &= 0xFFFFFFFF;
220
221 if (ctx->total[0] < (uint32_t) ilen) {
222 ctx->total[1]++;
223 }
224
225 if (left && ilen >= fill) {
226 memcpy((void *) (ctx->buffer + left), input, fill);
227 if ((ret = mbedtls_internal_md5_process(ctx, ctx->buffer)) != 0) {
228 return ret;
229 }
230
231 input += fill;
232 ilen -= fill;
233 left = 0;
234 }
235
236 while (ilen >= 64) {
237 if ((ret = mbedtls_internal_md5_process(ctx, input)) != 0) {
238 return ret;
239 }
240
241 input += 64;
242 ilen -= 64;
243 }
244
245 if (ilen > 0) {
246 memcpy((void *) (ctx->buffer + left), input, ilen);
247 }
248
249 return 0;
250 }
251
252 /*
253 * MD5 final digest
254 */
mbedtls_md5_finish(mbedtls_md5_context * ctx,unsigned char output[16])255 int mbedtls_md5_finish(mbedtls_md5_context *ctx,
256 unsigned char output[16])
257 {
258 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
259 uint32_t used;
260 uint32_t high, low;
261
262 /*
263 * Add padding: 0x80 then 0x00 until 8 bytes remain for the length
264 */
265 used = ctx->total[0] & 0x3F;
266
267 ctx->buffer[used++] = 0x80;
268
269 if (used <= 56) {
270 /* Enough room for padding + length in current block */
271 memset(ctx->buffer + used, 0, 56 - used);
272 } else {
273 /* We'll need an extra block */
274 memset(ctx->buffer + used, 0, 64 - used);
275
276 if ((ret = mbedtls_internal_md5_process(ctx, ctx->buffer)) != 0) {
277 goto exit;
278 }
279
280 memset(ctx->buffer, 0, 56);
281 }
282
283 /*
284 * Add message length
285 */
286 high = (ctx->total[0] >> 29)
287 | (ctx->total[1] << 3);
288 low = (ctx->total[0] << 3);
289
290 MBEDTLS_PUT_UINT32_LE(low, ctx->buffer, 56);
291 MBEDTLS_PUT_UINT32_LE(high, ctx->buffer, 60);
292
293 if ((ret = mbedtls_internal_md5_process(ctx, ctx->buffer)) != 0) {
294 goto exit;
295 }
296
297 /*
298 * Output final state
299 */
300 MBEDTLS_PUT_UINT32_LE(ctx->state[0], output, 0);
301 MBEDTLS_PUT_UINT32_LE(ctx->state[1], output, 4);
302 MBEDTLS_PUT_UINT32_LE(ctx->state[2], output, 8);
303 MBEDTLS_PUT_UINT32_LE(ctx->state[3], output, 12);
304
305 ret = 0;
306
307 exit:
308 mbedtls_md5_free(ctx);
309 return ret;
310 }
311
312 #endif /* !MBEDTLS_MD5_ALT */
313
314 /*
315 * output = MD5( input buffer )
316 */
mbedtls_md5(const unsigned char * input,size_t ilen,unsigned char output[16])317 int mbedtls_md5(const unsigned char *input,
318 size_t ilen,
319 unsigned char output[16])
320 {
321 int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
322 mbedtls_md5_context ctx;
323
324 mbedtls_md5_init(&ctx);
325
326 if ((ret = mbedtls_md5_starts(&ctx)) != 0) {
327 goto exit;
328 }
329
330 if ((ret = mbedtls_md5_update(&ctx, input, ilen)) != 0) {
331 goto exit;
332 }
333
334 if ((ret = mbedtls_md5_finish(&ctx, output)) != 0) {
335 goto exit;
336 }
337
338 exit:
339 mbedtls_md5_free(&ctx);
340
341 return ret;
342 }
343
344 #if defined(MBEDTLS_SELF_TEST)
345 /*
346 * RFC 1321 test vectors
347 */
348 static const unsigned char md5_test_buf[7][81] =
349 {
350 { "" },
351 { "a" },
352 { "abc" },
353 { "message digest" },
354 { "abcdefghijklmnopqrstuvwxyz" },
355 { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
356 { "12345678901234567890123456789012345678901234567890123456789012345678901234567890" }
357 };
358
359 static const size_t md5_test_buflen[7] =
360 {
361 0, 1, 3, 14, 26, 62, 80
362 };
363
364 static const unsigned char md5_test_sum[7][16] =
365 {
366 { 0xD4, 0x1D, 0x8C, 0xD9, 0x8F, 0x00, 0xB2, 0x04,
367 0xE9, 0x80, 0x09, 0x98, 0xEC, 0xF8, 0x42, 0x7E },
368 { 0x0C, 0xC1, 0x75, 0xB9, 0xC0, 0xF1, 0xB6, 0xA8,
369 0x31, 0xC3, 0x99, 0xE2, 0x69, 0x77, 0x26, 0x61 },
370 { 0x90, 0x01, 0x50, 0x98, 0x3C, 0xD2, 0x4F, 0xB0,
371 0xD6, 0x96, 0x3F, 0x7D, 0x28, 0xE1, 0x7F, 0x72 },
372 { 0xF9, 0x6B, 0x69, 0x7D, 0x7C, 0xB7, 0x93, 0x8D,
373 0x52, 0x5A, 0x2F, 0x31, 0xAA, 0xF1, 0x61, 0xD0 },
374 { 0xC3, 0xFC, 0xD3, 0xD7, 0x61, 0x92, 0xE4, 0x00,
375 0x7D, 0xFB, 0x49, 0x6C, 0xCA, 0x67, 0xE1, 0x3B },
376 { 0xD1, 0x74, 0xAB, 0x98, 0xD2, 0x77, 0xD9, 0xF5,
377 0xA5, 0x61, 0x1C, 0x2C, 0x9F, 0x41, 0x9D, 0x9F },
378 { 0x57, 0xED, 0xF4, 0xA2, 0x2B, 0xE3, 0xC9, 0x55,
379 0xAC, 0x49, 0xDA, 0x2E, 0x21, 0x07, 0xB6, 0x7A }
380 };
381
382 /*
383 * Checkup routine
384 */
mbedtls_md5_self_test(int verbose)385 int mbedtls_md5_self_test(int verbose)
386 {
387 int i, ret = 0;
388 unsigned char md5sum[16];
389
390 for (i = 0; i < 7; i++) {
391 if (verbose != 0) {
392 mbedtls_printf(" MD5 test #%d: ", i + 1);
393 }
394
395 ret = mbedtls_md5(md5_test_buf[i], md5_test_buflen[i], md5sum);
396 if (ret != 0) {
397 goto fail;
398 }
399
400 if (memcmp(md5sum, md5_test_sum[i], 16) != 0) {
401 ret = 1;
402 goto fail;
403 }
404
405 if (verbose != 0) {
406 mbedtls_printf("passed\n");
407 }
408 }
409
410 if (verbose != 0) {
411 mbedtls_printf("\n");
412 }
413
414 return 0;
415
416 fail:
417 if (verbose != 0) {
418 mbedtls_printf("failed\n");
419 }
420
421 return ret;
422 }
423
424 #endif /* MBEDTLS_SELF_TEST */
425
426 #endif /* MBEDTLS_MD5_C */
427
