New AES and GHASH implementations using POWER8 crypto opcodes.
[BearSSL] / src / hash / md5.c
1 /*
2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25 #include "inner.h"
26
27 #define F(B, C, D) ((((C) ^ (D)) & (B)) ^ (D))
28 #define G(B, C, D) ((((C) ^ (B)) & (D)) ^ (C))
29 #define H(B, C, D) ((B) ^ (C) ^ (D))
30 #define I(B, C, D) ((C) ^ ((B) | ~(D)))
31
32 #define ROTL(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
33
34 /* see inner.h */
35 const uint32_t br_md5_IV[4] = {
36 0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476
37 };
38
39 static const uint32_t K[64] = {
40 0xD76AA478, 0xE8C7B756, 0x242070DB, 0xC1BDCEEE,
41 0xF57C0FAF, 0x4787C62A, 0xA8304613, 0xFD469501,
42 0x698098D8, 0x8B44F7AF, 0xFFFF5BB1, 0x895CD7BE,
43 0x6B901122, 0xFD987193, 0xA679438E, 0x49B40821,
44
45 0xF61E2562, 0xC040B340, 0x265E5A51, 0xE9B6C7AA,
46 0xD62F105D, 0x02441453, 0xD8A1E681, 0xE7D3FBC8,
47 0x21E1CDE6, 0xC33707D6, 0xF4D50D87, 0x455A14ED,
48 0xA9E3E905, 0xFCEFA3F8, 0x676F02D9, 0x8D2A4C8A,
49
50 0xFFFA3942, 0x8771F681, 0x6D9D6122, 0xFDE5380C,
51 0xA4BEEA44, 0x4BDECFA9, 0xF6BB4B60, 0xBEBFBC70,
52 0x289B7EC6, 0xEAA127FA, 0xD4EF3085, 0x04881D05,
53 0xD9D4D039, 0xE6DB99E5, 0x1FA27CF8, 0xC4AC5665,
54
55 0xF4292244, 0x432AFF97, 0xAB9423A7, 0xFC93A039,
56 0x655B59C3, 0x8F0CCC92, 0xFFEFF47D, 0x85845DD1,
57 0x6FA87E4F, 0xFE2CE6E0, 0xA3014314, 0x4E0811A1,
58 0xF7537E82, 0xBD3AF235, 0x2AD7D2BB, 0xEB86D391
59 };
60
61 static const unsigned char MP[48] = {
62 1, 6, 11, 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12,
63 5, 8, 11, 14, 1, 4, 7, 10, 13, 0, 3, 6, 9, 12, 15, 2,
64 0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9
65 };
66
67 /* see inner.h */
68 void
69 br_md5_round(const unsigned char *buf, uint32_t *val)
70 {
71 uint32_t m[16];
72 uint32_t a, b, c, d;
73 int i;
74
75 a = val[0];
76 b = val[1];
77 c = val[2];
78 d = val[3];
79 /* obsolete
80 for (i = 0; i < 16; i ++) {
81 m[i] = br_dec32le(buf + (i << 2));
82 }
83 */
84 br_range_dec32le(m, 16, buf);
85
86 for (i = 0; i < 16; i += 4) {
87 a = b + ROTL(a + F(b, c, d) + m[i + 0] + K[i + 0], 7);
88 d = a + ROTL(d + F(a, b, c) + m[i + 1] + K[i + 1], 12);
89 c = d + ROTL(c + F(d, a, b) + m[i + 2] + K[i + 2], 17);
90 b = c + ROTL(b + F(c, d, a) + m[i + 3] + K[i + 3], 22);
91 }
92 for (i = 16; i < 32; i += 4) {
93 a = b + ROTL(a + G(b, c, d) + m[MP[i - 16]] + K[i + 0], 5);
94 d = a + ROTL(d + G(a, b, c) + m[MP[i - 15]] + K[i + 1], 9);
95 c = d + ROTL(c + G(d, a, b) + m[MP[i - 14]] + K[i + 2], 14);
96 b = c + ROTL(b + G(c, d, a) + m[MP[i - 13]] + K[i + 3], 20);
97 }
98 for (i = 32; i < 48; i += 4) {
99 a = b + ROTL(a + H(b, c, d) + m[MP[i - 16]] + K[i + 0], 4);
100 d = a + ROTL(d + H(a, b, c) + m[MP[i - 15]] + K[i + 1], 11);
101 c = d + ROTL(c + H(d, a, b) + m[MP[i - 14]] + K[i + 2], 16);
102 b = c + ROTL(b + H(c, d, a) + m[MP[i - 13]] + K[i + 3], 23);
103 }
104 for (i = 48; i < 64; i += 4) {
105 a = b + ROTL(a + I(b, c, d) + m[MP[i - 16]] + K[i + 0], 6);
106 d = a + ROTL(d + I(a, b, c) + m[MP[i - 15]] + K[i + 1], 10);
107 c = d + ROTL(c + I(d, a, b) + m[MP[i - 14]] + K[i + 2], 15);
108 b = c + ROTL(b + I(c, d, a) + m[MP[i - 13]] + K[i + 3], 21);
109 }
110
111 val[0] += a;
112 val[1] += b;
113 val[2] += c;
114 val[3] += d;
115 }
116
117 /* see bearssl.h */
118 void
119 br_md5_init(br_md5_context *cc)
120 {
121 cc->vtable = &br_md5_vtable;
122 memcpy(cc->val, br_md5_IV, sizeof cc->val);
123 cc->count = 0;
124 }
125
126 /* see bearssl.h */
127 void
128 br_md5_update(br_md5_context *cc, const void *data, size_t len)
129 {
130 const unsigned char *buf;
131 size_t ptr;
132
133 buf = data;
134 ptr = (size_t)cc->count & 63;
135 while (len > 0) {
136 size_t clen;
137
138 clen = 64 - ptr;
139 if (clen > len) {
140 clen = len;
141 }
142 memcpy(cc->buf + ptr, buf, clen);
143 ptr += clen;
144 buf += clen;
145 len -= clen;
146 cc->count += (uint64_t)clen;
147 if (ptr == 64) {
148 br_md5_round(cc->buf, cc->val);
149 ptr = 0;
150 }
151 }
152 }
153
154 /* see bearssl.h */
155 void
156 br_md5_out(const br_md5_context *cc, void *dst)
157 {
158 unsigned char buf[64];
159 uint32_t val[4];
160 size_t ptr;
161
162 ptr = (size_t)cc->count & 63;
163 memcpy(buf, cc->buf, ptr);
164 memcpy(val, cc->val, sizeof val);
165 buf[ptr ++] = 0x80;
166 if (ptr > 56) {
167 memset(buf + ptr, 0, 64 - ptr);
168 br_md5_round(buf, val);
169 memset(buf, 0, 56);
170 } else {
171 memset(buf + ptr, 0, 56 - ptr);
172 }
173 br_enc64le(buf + 56, cc->count << 3);
174 br_md5_round(buf, val);
175 br_range_enc32le(dst, val, 4);
176 }
177
178 /* see bearssl.h */
179 uint64_t
180 br_md5_state(const br_md5_context *cc, void *dst)
181 {
182 br_range_enc32le(dst, cc->val, 4);
183 return cc->count;
184 }
185
186 /* see bearssl.h */
187 void
188 br_md5_set_state(br_md5_context *cc, const void *stb, uint64_t count)
189 {
190 br_range_dec32le(cc->val, 4, stb);
191 cc->count = count;
192 }
193
194 /* see bearssl.h */
195 const br_hash_class br_md5_vtable = {
196 sizeof(br_md5_context),
197 BR_HASHDESC_ID(br_md5_ID)
198 | BR_HASHDESC_OUT(16)
199 | BR_HASHDESC_STATE(16)
200 | BR_HASHDESC_LBLEN(6)
201 | BR_HASHDESC_MD_PADDING,
202 (void (*)(const br_hash_class **))&br_md5_init,
203 (void (*)(const br_hash_class **, const void *, size_t))&br_md5_update,
204 (void (*)(const br_hash_class *const *, void *))&br_md5_out,
205 (uint64_t (*)(const br_hash_class *const *, void *))&br_md5_state,
206 (void (*)(const br_hash_class **, const void *, uint64_t))
207 &br_md5_set_state
208 };