This source file includes following definitions.
- MD5Init
- MD5Update
- MD5Final
- MD5Transform
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20 #include <sys/param.h>
21 #include <sys/systm.h>
22 #include <crypto/md5.h>
23
24 #define PUT_64BIT_LE(cp, value) do { \
25 (cp)[7] = (value) >> 56; \
26 (cp)[6] = (value) >> 48; \
27 (cp)[5] = (value) >> 40; \
28 (cp)[4] = (value) >> 32; \
29 (cp)[3] = (value) >> 24; \
30 (cp)[2] = (value) >> 16; \
31 (cp)[1] = (value) >> 8; \
32 (cp)[0] = (value); } while (0)
33
34 #define PUT_32BIT_LE(cp, value) do { \
35 (cp)[3] = (value) >> 24; \
36 (cp)[2] = (value) >> 16; \
37 (cp)[1] = (value) >> 8; \
38 (cp)[0] = (value); } while (0)
39
40 static u_int8_t PADDING[MD5_BLOCK_LENGTH] = {
41 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
42 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
43 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
44 };
45
46
47
48
49
50 void
51 MD5Init(MD5_CTX *ctx)
52 {
53 ctx->count = 0;
54 ctx->state[0] = 0x67452301;
55 ctx->state[1] = 0xefcdab89;
56 ctx->state[2] = 0x98badcfe;
57 ctx->state[3] = 0x10325476;
58 }
59
60
61
62
63
64 void
65 MD5Update(MD5_CTX *ctx, const unsigned char *input, size_t len)
66 {
67 size_t have, need;
68
69
70 have = (size_t)((ctx->count >> 3) & (MD5_BLOCK_LENGTH - 1));
71 need = MD5_BLOCK_LENGTH - have;
72
73
74 ctx->count += (u_int64_t)len << 3;
75
76 if (len >= need) {
77 if (have != 0) {
78 bcopy(input, ctx->buffer + have, need);
79 MD5Transform(ctx->state, ctx->buffer);
80 input += need;
81 len -= need;
82 have = 0;
83 }
84
85
86 while (len >= MD5_BLOCK_LENGTH) {
87 MD5Transform(ctx->state, input);
88 input += MD5_BLOCK_LENGTH;
89 len -= MD5_BLOCK_LENGTH;
90 }
91 }
92
93
94 if (len != 0)
95 bcopy(input, ctx->buffer + have, len);
96 }
97
98
99
100
101
102 void
103 MD5Final(unsigned char digest[MD5_DIGEST_LENGTH], MD5_CTX *ctx)
104 {
105 u_int8_t count[8];
106 size_t padlen;
107 int i;
108
109
110 PUT_64BIT_LE(count, ctx->count);
111
112
113 padlen = MD5_BLOCK_LENGTH -
114 ((ctx->count >> 3) & (MD5_BLOCK_LENGTH - 1));
115 if (padlen < 1 + 8)
116 padlen += MD5_BLOCK_LENGTH;
117 MD5Update(ctx, PADDING, padlen - 8);
118 MD5Update(ctx, count, 8);
119
120 if (digest != NULL) {
121 for (i = 0; i < 4; i++)
122 PUT_32BIT_LE(digest + i * 4, ctx->state[i]);
123 }
124 bzero(ctx, sizeof(*ctx));
125 }
126
127
128
129
130
131 #define F1(x, y, z) (z ^ (x & (y ^ z)))
132 #define F2(x, y, z) F1(z, x, y)
133 #define F3(x, y, z) (x ^ y ^ z)
134 #define F4(x, y, z) (y ^ (x | ~z))
135
136
137 #define MD5STEP(f, w, x, y, z, data, s) \
138 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
139
140
141
142
143
144
145 void
146 MD5Transform(u_int32_t state[4], const u_int8_t block[MD5_BLOCK_LENGTH])
147 {
148 u_int32_t a, b, c, d, in[MD5_BLOCK_LENGTH / 4];
149
150 #if BYTE_ORDER == LITTLE_ENDIAN
151 bcopy(block, in, sizeof(in));
152 #else
153 for (a = 0; a < MD5_BLOCK_LENGTH / 4; a++) {
154 in[a] = (u_int32_t)(
155 (u_int32_t)(block[a * 4 + 0]) |
156 (u_int32_t)(block[a * 4 + 1]) << 8 |
157 (u_int32_t)(block[a * 4 + 2]) << 16 |
158 (u_int32_t)(block[a * 4 + 3]) << 24);
159 }
160 #endif
161
162 a = state[0];
163 b = state[1];
164 c = state[2];
165 d = state[3];
166
167 MD5STEP(F1, a, b, c, d, in[ 0] + 0xd76aa478, 7);
168 MD5STEP(F1, d, a, b, c, in[ 1] + 0xe8c7b756, 12);
169 MD5STEP(F1, c, d, a, b, in[ 2] + 0x242070db, 17);
170 MD5STEP(F1, b, c, d, a, in[ 3] + 0xc1bdceee, 22);
171 MD5STEP(F1, a, b, c, d, in[ 4] + 0xf57c0faf, 7);
172 MD5STEP(F1, d, a, b, c, in[ 5] + 0x4787c62a, 12);
173 MD5STEP(F1, c, d, a, b, in[ 6] + 0xa8304613, 17);
174 MD5STEP(F1, b, c, d, a, in[ 7] + 0xfd469501, 22);
175 MD5STEP(F1, a, b, c, d, in[ 8] + 0x698098d8, 7);
176 MD5STEP(F1, d, a, b, c, in[ 9] + 0x8b44f7af, 12);
177 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
178 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
179 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
180 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
181 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
182 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
183
184 MD5STEP(F2, a, b, c, d, in[ 1] + 0xf61e2562, 5);
185 MD5STEP(F2, d, a, b, c, in[ 6] + 0xc040b340, 9);
186 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
187 MD5STEP(F2, b, c, d, a, in[ 0] + 0xe9b6c7aa, 20);
188 MD5STEP(F2, a, b, c, d, in[ 5] + 0xd62f105d, 5);
189 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
190 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
191 MD5STEP(F2, b, c, d, a, in[ 4] + 0xe7d3fbc8, 20);
192 MD5STEP(F2, a, b, c, d, in[ 9] + 0x21e1cde6, 5);
193 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
194 MD5STEP(F2, c, d, a, b, in[ 3] + 0xf4d50d87, 14);
195 MD5STEP(F2, b, c, d, a, in[ 8] + 0x455a14ed, 20);
196 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
197 MD5STEP(F2, d, a, b, c, in[ 2] + 0xfcefa3f8, 9);
198 MD5STEP(F2, c, d, a, b, in[ 7] + 0x676f02d9, 14);
199 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
200
201 MD5STEP(F3, a, b, c, d, in[ 5] + 0xfffa3942, 4);
202 MD5STEP(F3, d, a, b, c, in[ 8] + 0x8771f681, 11);
203 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
204 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
205 MD5STEP(F3, a, b, c, d, in[ 1] + 0xa4beea44, 4);
206 MD5STEP(F3, d, a, b, c, in[ 4] + 0x4bdecfa9, 11);
207 MD5STEP(F3, c, d, a, b, in[ 7] + 0xf6bb4b60, 16);
208 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
209 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
210 MD5STEP(F3, d, a, b, c, in[ 0] + 0xeaa127fa, 11);
211 MD5STEP(F3, c, d, a, b, in[ 3] + 0xd4ef3085, 16);
212 MD5STEP(F3, b, c, d, a, in[ 6] + 0x04881d05, 23);
213 MD5STEP(F3, a, b, c, d, in[ 9] + 0xd9d4d039, 4);
214 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
215 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
216 MD5STEP(F3, b, c, d, a, in[2 ] + 0xc4ac5665, 23);
217
218 MD5STEP(F4, a, b, c, d, in[ 0] + 0xf4292244, 6);
219 MD5STEP(F4, d, a, b, c, in[7 ] + 0x432aff97, 10);
220 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
221 MD5STEP(F4, b, c, d, a, in[5 ] + 0xfc93a039, 21);
222 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
223 MD5STEP(F4, d, a, b, c, in[3 ] + 0x8f0ccc92, 10);
224 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
225 MD5STEP(F4, b, c, d, a, in[1 ] + 0x85845dd1, 21);
226 MD5STEP(F4, a, b, c, d, in[8 ] + 0x6fa87e4f, 6);
227 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
228 MD5STEP(F4, c, d, a, b, in[6 ] + 0xa3014314, 15);
229 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
230 MD5STEP(F4, a, b, c, d, in[4 ] + 0xf7537e82, 6);
231 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
232 MD5STEP(F4, c, d, a, b, in[2 ] + 0x2ad7d2bb, 15);
233 MD5STEP(F4, b, c, d, a, in[9 ] + 0xeb86d391, 21);
234
235 state[0] += a;
236 state[1] += b;
237 state[2] += c;
238 state[3] += d;
239 }