1 /* MD5 checksum routines used for authentication. Not covered by GPL, but
2 in the public domain as per the copyright below */
3 #if defined( __OpenBSD__ )
4 # include <machine/types.h>
5 # include <sys/endian.h>
6 #elif defined( __FreeBSD__ )
7 # include <sys/types.h>
8 # include <sys/endian.h>
9 #elif defined( BSD ) && ( BSD >= 199103 ) || defined(__APPLE__)
10 # include <machine/endian.h>
14 # if __BYTE_ORDER == __BIG_ENDIAN || BYTE_ORDER == BIG_ENDIAN
19 * This code implements the MD5 message-digest algorithm.
20 * The algorithm is due to Ron Rivest. This code was
21 * written by Colin Plumb in 1993, no copyright is claimed.
22 * This code is in the public domain; do with it what you wish.
24 * Equivalent code is available from RSA Data Security, Inc.
25 * This code has been tested against that, and is equivalent,
26 * except that you don't need to include two pages of legalese
29 * To compute the message digest of a chunk of bytes, declare an
30 * MD5Context structure, pass it to MD5Init, call MD5Update as
31 * needed on buffers full of bytes, and then call MD5Final, which
32 * will fill a supplied 16-byte array with the digest.
34 #include <string.h> /* for memcpy() */
35 #include <asterisk/md5.h>
38 #define byteReverse(buf, len) /* Nothing */
40 void byteReverse(unsigned char *buf, unsigned longs);
44 * Note: this code is harmless on little-endian machines.
46 void byteReverse(unsigned char *buf, unsigned longs)
50 t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
51 ((unsigned) buf[1] << 8 | buf[0]);
52 *(uint32_t *) buf = t;
60 * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
61 * initialization constants.
63 void MD5Init(struct MD5Context *ctx)
65 ctx->buf[0] = 0x67452301;
66 ctx->buf[1] = 0xefcdab89;
67 ctx->buf[2] = 0x98badcfe;
68 ctx->buf[3] = 0x10325476;
75 * Update context to reflect the concatenation of another buffer full
78 void MD5Update(struct MD5Context *ctx, unsigned char const *buf, unsigned len)
85 if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
86 ctx->bits[1]++; /* Carry from low to high */
87 ctx->bits[1] += len >> 29;
89 t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
91 /* Handle any leading odd-sized chunks */
94 unsigned char *p = (unsigned char *) ctx->in + t;
102 byteReverse(ctx->in, 16);
103 MD5Transform(ctx->buf, (uint32_t *) ctx->in);
107 /* Process data in 64-byte chunks */
110 memcpy(ctx->in, buf, 64);
111 byteReverse(ctx->in, 16);
112 MD5Transform(ctx->buf, (uint32_t *) ctx->in);
117 /* Handle any remaining bytes of data. */
119 memcpy(ctx->in, buf, len);
123 * Final wrapup - pad to 64-byte boundary with the bit pattern
124 * 1 0* (64-bit count of bits processed, MSB-first)
126 void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
131 /* Compute number of bytes mod 64 */
132 count = (ctx->bits[0] >> 3) & 0x3F;
134 /* Set the first char of padding to 0x80. This is safe since there is
135 always at least one byte free */
139 /* Bytes of padding needed to make 64 bytes */
140 count = 64 - 1 - count;
142 /* Pad out to 56 mod 64 */
144 /* Two lots of padding: Pad the first block to 64 bytes */
146 byteReverse(ctx->in, 16);
147 MD5Transform(ctx->buf, (uint32_t *) ctx->in);
149 /* Now fill the next block with 56 bytes */
150 memset(ctx->in, 0, 56);
152 /* Pad block to 56 bytes */
153 memset(p, 0, count - 8);
155 byteReverse(ctx->in, 14);
157 /* Append length in bits and transform */
158 ((uint32_t *) ctx->in)[14] = ctx->bits[0];
159 ((uint32_t *) ctx->in)[15] = ctx->bits[1];
161 MD5Transform(ctx->buf, (uint32_t *) ctx->in);
162 byteReverse((unsigned char *) ctx->buf, 4);
163 memcpy(digest, ctx->buf, 16);
164 memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */
169 /* The four core functions - F1 is optimized somewhat */
171 /* #define F1(x, y, z) (x & y | ~x & z) */
172 #define F1(x, y, z) (z ^ (x & (y ^ z)))
173 #define F2(x, y, z) F1(z, x, y)
174 #define F3(x, y, z) (x ^ y ^ z)
175 #define F4(x, y, z) (y ^ (x | ~z))
177 /* This is the central step in the MD5 algorithm. */
178 #define MD5STEP(f, w, x, y, z, data, s) \
179 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
182 * The core of the MD5 algorithm, this alters an existing MD5 hash to
183 * reflect the addition of 16 longwords of new data. MD5Update blocks
184 * the data and converts bytes into longwords for this routine.
186 void MD5Transform(uint32_t buf[4], uint32_t const in[16])
188 register uint32_t a, b, c, d;
195 MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
196 MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
197 MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
198 MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
199 MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
200 MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
201 MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
202 MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
203 MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
204 MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
205 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
206 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
207 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
208 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
209 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
210 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
212 MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
213 MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
214 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
215 MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
216 MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
217 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
218 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
219 MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
220 MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
221 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
222 MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
223 MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
224 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
225 MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
226 MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
227 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
229 MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
230 MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
231 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
232 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
233 MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
234 MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
235 MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
236 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
237 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
238 MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
239 MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
240 MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
241 MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
242 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
243 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
244 MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
246 MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
247 MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
248 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
249 MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
250 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
251 MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
252 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
253 MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
254 MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
255 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
256 MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
257 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
258 MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
259 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
260 MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
261 MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);