2 * md5.c MD5 message-digest algorithm
6 * This file is licensed under the LGPL, but is largely derived
7 * from public domain source code.
10 #include <freeradius-devel/autoconf.h>
11 #include <freeradius-devel/libradius.h>
14 * FORCE MD5 TO USE OUR MD5 HEADER FILE!
15 * If we don't do this, it might pick up the systems broken MD5.
17 #include "../include/md5.h"
19 void librad_md5_calc(uint8_t *output, const uint8_t *input,
24 lrad_MD5Init(&context);
25 lrad_MD5Update(&context, input, inlen);
26 lrad_MD5Final(output, &context);
29 /* The below was retrieved from
30 * http://www.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/crypto/md5.c?rev=1.1
31 * with the following changes:
32 * #includes commented out.
33 * Support context->count as uint32_t[2] instead of uint64_t
38 * This code implements the MD5 message-digest algorithm.
39 * The algorithm is due to Ron Rivest. This code was
40 * written by Colin Plumb in 1993, no copyright is claimed.
41 * This code is in the public domain; do with it what you wish.
43 * Equivalent code is available from RSA Data Security, Inc.
44 * This code has been tested against that, and is equivalent,
45 * except that you don't need to include two pages of legalese
48 * To compute the message digest of a chunk of bytes, declare an
49 * MD5Context structure, pass it to MD5Init, call MD5Update as
50 * needed on buffers full of bytes, and then call MD5Final, which
51 * will fill a supplied 16-byte array with the digest.
54 /*#include <sys/param.h>*/
55 /*#include <sys/systm.h>*/
56 /*#include <crypto/md5.h>*/
58 #define PUT_64BIT_LE(cp, value) do { \
59 (cp)[7] = (value)[1] >> 24; \
60 (cp)[6] = (value)[1] >> 16; \
61 (cp)[5] = (value)[1] >> 8; \
62 (cp)[4] = (value)[1]; \
63 (cp)[3] = (value)[0] >> 24; \
64 (cp)[2] = (value)[0] >> 16; \
65 (cp)[1] = (value)[0] >> 8; \
66 (cp)[0] = (value)[0]; } while (0)
68 #define PUT_32BIT_LE(cp, value) do { \
69 (cp)[3] = (value) >> 24; \
70 (cp)[2] = (value) >> 16; \
71 (cp)[1] = (value) >> 8; \
72 (cp)[0] = (value); } while (0)
74 static const uint8_t PADDING[MD5_BLOCK_LENGTH] = {
75 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
76 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
77 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
81 * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
82 * initialization constants.
85 lrad_MD5Init(lrad_MD5_CTX *ctx)
89 ctx->state[0] = 0x67452301;
90 ctx->state[1] = 0xefcdab89;
91 ctx->state[2] = 0x98badcfe;
92 ctx->state[3] = 0x10325476;
96 * Update context to reflect the concatenation of another buffer full
100 lrad_MD5Update(lrad_MD5_CTX *ctx, const unsigned char *input, size_t len)
104 /* Check how many bytes we already have and how many more we need. */
105 have = (size_t)((ctx->count[0] >> 3) & (MD5_BLOCK_LENGTH - 1));
106 need = MD5_BLOCK_LENGTH - have;
108 /* Update bitcount */
109 /* ctx->count += (uint64_t)len << 3;*/
110 if ((ctx->count[0] += ((uint32_t)len << 3)) < (uint32_t)len) {
111 /* Overflowed ctx->count[0] */
114 ctx->count[1] += ((uint32_t)len >> 29);
118 memcpy(ctx->buffer + have, input, need);
119 lrad_MD5Transform(ctx->state, ctx->buffer);
125 /* Process data in MD5_BLOCK_LENGTH-byte chunks. */
126 while (len >= MD5_BLOCK_LENGTH) {
127 lrad_MD5Transform(ctx->state, input);
128 input += MD5_BLOCK_LENGTH;
129 len -= MD5_BLOCK_LENGTH;
133 /* Handle any remaining bytes of data. */
135 memcpy(ctx->buffer + have, input, len);
139 * Final wrapup - pad to 64-byte boundary with the bit pattern
140 * 1 0* (64-bit count of bits processed, MSB-first)
143 lrad_MD5Final(uint8_t digest[MD5_DIGEST_LENGTH], MD5_CTX *ctx)
149 /* Convert count to 8 bytes in little endian order. */
150 PUT_64BIT_LE(count, ctx->count);
152 /* Pad out to 56 mod 64. */
153 padlen = MD5_BLOCK_LENGTH -
154 ((ctx->count[0] >> 3) & (MD5_BLOCK_LENGTH - 1));
156 padlen += MD5_BLOCK_LENGTH;
157 lrad_MD5Update(ctx, PADDING, padlen - 8); /* padlen - 8 <= 64 */
158 lrad_MD5Update(ctx, count, 8);
160 if (digest != NULL) {
161 for (i = 0; i < 4; i++)
162 PUT_32BIT_LE(digest + i * 4, ctx->state[i]);
164 memset(ctx, 0, sizeof(*ctx)); /* in case it's sensitive */
168 /* The four core functions - F1 is optimized somewhat */
170 /* #define F1(x, y, z) (x & y | ~x & z) */
171 #define F1(x, y, z) (z ^ (x & (y ^ z)))
172 #define F2(x, y, z) F1(z, x, y)
173 #define F3(x, y, z) (x ^ y ^ z)
174 #define F4(x, y, z) (y ^ (x | ~z))
176 /* This is the central step in the MD5 algorithm. */
177 #define MD5STEP(f, w, x, y, z, data, s) \
178 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
181 * The core of the MD5 algorithm, this alters an existing MD5 hash to
182 * reflect the addition of 16 longwords of new data. MD5Update blocks
183 * the data and converts bytes into longwords for this routine.
186 lrad_MD5Transform(uint32_t state[4], const uint8_t block[MD5_BLOCK_LENGTH])
188 uint32_t a, b, c, d, in[MD5_BLOCK_LENGTH / 4];
190 for (a = 0; a < MD5_BLOCK_LENGTH / 4; a++) {
192 (uint32_t)(block[a * 4 + 0]) |
193 (uint32_t)(block[a * 4 + 1]) << 8 |
194 (uint32_t)(block[a * 4 + 2]) << 16 |
195 (uint32_t)(block[a * 4 + 3]) << 24);
203 MD5STEP(F1, a, b, c, d, in[ 0] + 0xd76aa478, 7);
204 MD5STEP(F1, d, a, b, c, in[ 1] + 0xe8c7b756, 12);
205 MD5STEP(F1, c, d, a, b, in[ 2] + 0x242070db, 17);
206 MD5STEP(F1, b, c, d, a, in[ 3] + 0xc1bdceee, 22);
207 MD5STEP(F1, a, b, c, d, in[ 4] + 0xf57c0faf, 7);
208 MD5STEP(F1, d, a, b, c, in[ 5] + 0x4787c62a, 12);
209 MD5STEP(F1, c, d, a, b, in[ 6] + 0xa8304613, 17);
210 MD5STEP(F1, b, c, d, a, in[ 7] + 0xfd469501, 22);
211 MD5STEP(F1, a, b, c, d, in[ 8] + 0x698098d8, 7);
212 MD5STEP(F1, d, a, b, c, in[ 9] + 0x8b44f7af, 12);
213 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
214 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
215 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
216 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
217 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
218 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
220 MD5STEP(F2, a, b, c, d, in[ 1] + 0xf61e2562, 5);
221 MD5STEP(F2, d, a, b, c, in[ 6] + 0xc040b340, 9);
222 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
223 MD5STEP(F2, b, c, d, a, in[ 0] + 0xe9b6c7aa, 20);
224 MD5STEP(F2, a, b, c, d, in[ 5] + 0xd62f105d, 5);
225 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
226 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
227 MD5STEP(F2, b, c, d, a, in[ 4] + 0xe7d3fbc8, 20);
228 MD5STEP(F2, a, b, c, d, in[ 9] + 0x21e1cde6, 5);
229 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
230 MD5STEP(F2, c, d, a, b, in[ 3] + 0xf4d50d87, 14);
231 MD5STEP(F2, b, c, d, a, in[ 8] + 0x455a14ed, 20);
232 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
233 MD5STEP(F2, d, a, b, c, in[ 2] + 0xfcefa3f8, 9);
234 MD5STEP(F2, c, d, a, b, in[ 7] + 0x676f02d9, 14);
235 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
237 MD5STEP(F3, a, b, c, d, in[ 5] + 0xfffa3942, 4);
238 MD5STEP(F3, d, a, b, c, in[ 8] + 0x8771f681, 11);
239 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
240 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
241 MD5STEP(F3, a, b, c, d, in[ 1] + 0xa4beea44, 4);
242 MD5STEP(F3, d, a, b, c, in[ 4] + 0x4bdecfa9, 11);
243 MD5STEP(F3, c, d, a, b, in[ 7] + 0xf6bb4b60, 16);
244 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
245 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
246 MD5STEP(F3, d, a, b, c, in[ 0] + 0xeaa127fa, 11);
247 MD5STEP(F3, c, d, a, b, in[ 3] + 0xd4ef3085, 16);
248 MD5STEP(F3, b, c, d, a, in[ 6] + 0x04881d05, 23);
249 MD5STEP(F3, a, b, c, d, in[ 9] + 0xd9d4d039, 4);
250 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
251 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
252 MD5STEP(F3, b, c, d, a, in[2 ] + 0xc4ac5665, 23);
254 MD5STEP(F4, a, b, c, d, in[ 0] + 0xf4292244, 6);
255 MD5STEP(F4, d, a, b, c, in[7 ] + 0x432aff97, 10);
256 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
257 MD5STEP(F4, b, c, d, a, in[5 ] + 0xfc93a039, 21);
258 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
259 MD5STEP(F4, d, a, b, c, in[3 ] + 0x8f0ccc92, 10);
260 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
261 MD5STEP(F4, b, c, d, a, in[1 ] + 0x85845dd1, 21);
262 MD5STEP(F4, a, b, c, d, in[8 ] + 0x6fa87e4f, 6);
263 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
264 MD5STEP(F4, c, d, a, b, in[6 ] + 0xa3014314, 15);
265 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
266 MD5STEP(F4, a, b, c, d, in[4 ] + 0xf7537e82, 6);
267 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
268 MD5STEP(F4, c, d, a, b, in[2 ] + 0x2ad7d2bb, 15);
269 MD5STEP(F4, b, c, d, a, in[9 ] + 0xeb86d391, 21);