1 /* MIT (BSD) license - see LICENSE file for details */
2 /* SHA256 core code translated from the Bitcoin project's C++:
4 * src/crypto/sha256.cpp commit 417532c8acb93c36c2b6fd052b7c11b6a2906aa2
5 * Copyright (c) 2014 The Bitcoin Core developers
6 * Distributed under the MIT software license, see the accompanying
7 * file COPYING or http://www.opensource.org/licenses/mit-license.php.
9 #include <ccan/crypto/sha256/sha256.h>
10 #include <ccan/endian/endian.h>
15 static void invalidate_sha256(struct sha256_ctx *ctx)
17 #ifdef CCAN_CRYPTO_SHA256_USE_OPENSSL
24 static void check_sha256(struct sha256_ctx *ctx)
26 #ifdef CCAN_CRYPTO_SHA256_USE_OPENSSL
27 assert(ctx->c.md_len != 0);
29 assert(ctx->bytes != -1ULL);
33 #ifdef CCAN_CRYPTO_SHA256_USE_OPENSSL
34 void sha256_init(struct sha256_ctx *ctx)
39 void sha256_update_arr(struct sha256_ctx *ctx, const void *p,
40 size_t num, size_t size)
42 size_t total = num * size;
45 assert(size == 0 || total / size == num);
47 SHA256_Update(&ctx->c, p, total);
50 void sha256_done(struct sha256_ctx *ctx, struct sha256 *res)
52 SHA256_Final(res->u.u8, &ctx->c);
53 invalidate_sha256(ctx);
56 static uint32_t Ch(uint32_t x, uint32_t y, uint32_t z)
58 return z ^ (x & (y ^ z));
60 static uint32_t Maj(uint32_t x, uint32_t y, uint32_t z)
62 return (x & y) | (z & (x | y));
64 static uint32_t Sigma0(uint32_t x)
66 return (x >> 2 | x << 30) ^ (x >> 13 | x << 19) ^ (x >> 22 | x << 10);
68 static uint32_t Sigma1(uint32_t x)
70 return (x >> 6 | x << 26) ^ (x >> 11 | x << 21) ^ (x >> 25 | x << 7);
72 static uint32_t sigma0(uint32_t x)
74 return (x >> 7 | x << 25) ^ (x >> 18 | x << 14) ^ (x >> 3);
76 static uint32_t sigma1(uint32_t x)
78 return (x >> 17 | x << 15) ^ (x >> 19 | x << 13) ^ (x >> 10);
81 /** One round of SHA-256. */
82 static void Round(uint32_t a, uint32_t b, uint32_t c, uint32_t *d, uint32_t e, uint32_t f, uint32_t g, uint32_t *h, uint32_t k, uint32_t w)
84 uint32_t t1 = *h + Sigma1(e) + Ch(e, f, g) + k + w;
85 uint32_t t2 = Sigma0(a) + Maj(a, b, c);
90 /** Perform one SHA-256 transformation, processing a 64-byte chunk. */
91 static void Transform(uint32_t *s, const uint32_t *chunk)
93 uint32_t a = s[0], b = s[1], c = s[2], d = s[3], e = s[4], f = s[5], g = s[6], h = s[7];
94 uint32_t w0, w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14, w15;
96 Round(a, b, c, &d, e, f, g, &h, 0x428a2f98, w0 = be32_to_cpu(chunk[0]));
97 Round(h, a, b, &c, d, e, f, &g, 0x71374491, w1 = be32_to_cpu(chunk[1]));
98 Round(g, h, a, &b, c, d, e, &f, 0xb5c0fbcf, w2 = be32_to_cpu(chunk[2]));
99 Round(f, g, h, &a, b, c, d, &e, 0xe9b5dba5, w3 = be32_to_cpu(chunk[3]));
100 Round(e, f, g, &h, a, b, c, &d, 0x3956c25b, w4 = be32_to_cpu(chunk[4]));
101 Round(d, e, f, &g, h, a, b, &c, 0x59f111f1, w5 = be32_to_cpu(chunk[5]));
102 Round(c, d, e, &f, g, h, a, &b, 0x923f82a4, w6 = be32_to_cpu(chunk[6]));
103 Round(b, c, d, &e, f, g, h, &a, 0xab1c5ed5, w7 = be32_to_cpu(chunk[7]));
104 Round(a, b, c, &d, e, f, g, &h, 0xd807aa98, w8 = be32_to_cpu(chunk[8]));
105 Round(h, a, b, &c, d, e, f, &g, 0x12835b01, w9 = be32_to_cpu(chunk[9]));
106 Round(g, h, a, &b, c, d, e, &f, 0x243185be, w10 = be32_to_cpu(chunk[10]));
107 Round(f, g, h, &a, b, c, d, &e, 0x550c7dc3, w11 = be32_to_cpu(chunk[11]));
108 Round(e, f, g, &h, a, b, c, &d, 0x72be5d74, w12 = be32_to_cpu(chunk[12]));
109 Round(d, e, f, &g, h, a, b, &c, 0x80deb1fe, w13 = be32_to_cpu(chunk[13]));
110 Round(c, d, e, &f, g, h, a, &b, 0x9bdc06a7, w14 = be32_to_cpu(chunk[14]));
111 Round(b, c, d, &e, f, g, h, &a, 0xc19bf174, w15 = be32_to_cpu(chunk[15]));
113 Round(a, b, c, &d, e, f, g, &h, 0xe49b69c1, w0 += sigma1(w14) + w9 + sigma0(w1));
114 Round(h, a, b, &c, d, e, f, &g, 0xefbe4786, w1 += sigma1(w15) + w10 + sigma0(w2));
115 Round(g, h, a, &b, c, d, e, &f, 0x0fc19dc6, w2 += sigma1(w0) + w11 + sigma0(w3));
116 Round(f, g, h, &a, b, c, d, &e, 0x240ca1cc, w3 += sigma1(w1) + w12 + sigma0(w4));
117 Round(e, f, g, &h, a, b, c, &d, 0x2de92c6f, w4 += sigma1(w2) + w13 + sigma0(w5));
118 Round(d, e, f, &g, h, a, b, &c, 0x4a7484aa, w5 += sigma1(w3) + w14 + sigma0(w6));
119 Round(c, d, e, &f, g, h, a, &b, 0x5cb0a9dc, w6 += sigma1(w4) + w15 + sigma0(w7));
120 Round(b, c, d, &e, f, g, h, &a, 0x76f988da, w7 += sigma1(w5) + w0 + sigma0(w8));
121 Round(a, b, c, &d, e, f, g, &h, 0x983e5152, w8 += sigma1(w6) + w1 + sigma0(w9));
122 Round(h, a, b, &c, d, e, f, &g, 0xa831c66d, w9 += sigma1(w7) + w2 + sigma0(w10));
123 Round(g, h, a, &b, c, d, e, &f, 0xb00327c8, w10 += sigma1(w8) + w3 + sigma0(w11));
124 Round(f, g, h, &a, b, c, d, &e, 0xbf597fc7, w11 += sigma1(w9) + w4 + sigma0(w12));
125 Round(e, f, g, &h, a, b, c, &d, 0xc6e00bf3, w12 += sigma1(w10) + w5 + sigma0(w13));
126 Round(d, e, f, &g, h, a, b, &c, 0xd5a79147, w13 += sigma1(w11) + w6 + sigma0(w14));
127 Round(c, d, e, &f, g, h, a, &b, 0x06ca6351, w14 += sigma1(w12) + w7 + sigma0(w15));
128 Round(b, c, d, &e, f, g, h, &a, 0x14292967, w15 += sigma1(w13) + w8 + sigma0(w0));
130 Round(a, b, c, &d, e, f, g, &h, 0x27b70a85, w0 += sigma1(w14) + w9 + sigma0(w1));
131 Round(h, a, b, &c, d, e, f, &g, 0x2e1b2138, w1 += sigma1(w15) + w10 + sigma0(w2));
132 Round(g, h, a, &b, c, d, e, &f, 0x4d2c6dfc, w2 += sigma1(w0) + w11 + sigma0(w3));
133 Round(f, g, h, &a, b, c, d, &e, 0x53380d13, w3 += sigma1(w1) + w12 + sigma0(w4));
134 Round(e, f, g, &h, a, b, c, &d, 0x650a7354, w4 += sigma1(w2) + w13 + sigma0(w5));
135 Round(d, e, f, &g, h, a, b, &c, 0x766a0abb, w5 += sigma1(w3) + w14 + sigma0(w6));
136 Round(c, d, e, &f, g, h, a, &b, 0x81c2c92e, w6 += sigma1(w4) + w15 + sigma0(w7));
137 Round(b, c, d, &e, f, g, h, &a, 0x92722c85, w7 += sigma1(w5) + w0 + sigma0(w8));
138 Round(a, b, c, &d, e, f, g, &h, 0xa2bfe8a1, w8 += sigma1(w6) + w1 + sigma0(w9));
139 Round(h, a, b, &c, d, e, f, &g, 0xa81a664b, w9 += sigma1(w7) + w2 + sigma0(w10));
140 Round(g, h, a, &b, c, d, e, &f, 0xc24b8b70, w10 += sigma1(w8) + w3 + sigma0(w11));
141 Round(f, g, h, &a, b, c, d, &e, 0xc76c51a3, w11 += sigma1(w9) + w4 + sigma0(w12));
142 Round(e, f, g, &h, a, b, c, &d, 0xd192e819, w12 += sigma1(w10) + w5 + sigma0(w13));
143 Round(d, e, f, &g, h, a, b, &c, 0xd6990624, w13 += sigma1(w11) + w6 + sigma0(w14));
144 Round(c, d, e, &f, g, h, a, &b, 0xf40e3585, w14 += sigma1(w12) + w7 + sigma0(w15));
145 Round(b, c, d, &e, f, g, h, &a, 0x106aa070, w15 += sigma1(w13) + w8 + sigma0(w0));
147 Round(a, b, c, &d, e, f, g, &h, 0x19a4c116, w0 += sigma1(w14) + w9 + sigma0(w1));
148 Round(h, a, b, &c, d, e, f, &g, 0x1e376c08, w1 += sigma1(w15) + w10 + sigma0(w2));
149 Round(g, h, a, &b, c, d, e, &f, 0x2748774c, w2 += sigma1(w0) + w11 + sigma0(w3));
150 Round(f, g, h, &a, b, c, d, &e, 0x34b0bcb5, w3 += sigma1(w1) + w12 + sigma0(w4));
151 Round(e, f, g, &h, a, b, c, &d, 0x391c0cb3, w4 += sigma1(w2) + w13 + sigma0(w5));
152 Round(d, e, f, &g, h, a, b, &c, 0x4ed8aa4a, w5 += sigma1(w3) + w14 + sigma0(w6));
153 Round(c, d, e, &f, g, h, a, &b, 0x5b9cca4f, w6 += sigma1(w4) + w15 + sigma0(w7));
154 Round(b, c, d, &e, f, g, h, &a, 0x682e6ff3, w7 += sigma1(w5) + w0 + sigma0(w8));
155 Round(a, b, c, &d, e, f, g, &h, 0x748f82ee, w8 += sigma1(w6) + w1 + sigma0(w9));
156 Round(h, a, b, &c, d, e, f, &g, 0x78a5636f, w9 += sigma1(w7) + w2 + sigma0(w10));
157 Round(g, h, a, &b, c, d, e, &f, 0x84c87814, w10 += sigma1(w8) + w3 + sigma0(w11));
158 Round(f, g, h, &a, b, c, d, &e, 0x8cc70208, w11 += sigma1(w9) + w4 + sigma0(w12));
159 Round(e, f, g, &h, a, b, c, &d, 0x90befffa, w12 += sigma1(w10) + w5 + sigma0(w13));
160 Round(d, e, f, &g, h, a, b, &c, 0xa4506ceb, w13 += sigma1(w11) + w6 + sigma0(w14));
161 Round(c, d, e, &f, g, h, a, &b, 0xbef9a3f7, w14 + sigma1(w12) + w7 + sigma0(w15));
162 Round(b, c, d, &e, f, g, h, &a, 0xc67178f2, w15 + sigma1(w13) + w8 + sigma0(w0));
174 static bool alignment_ok(const void *p, size_t n)
176 #if HAVE_UNALIGNED_ACCESS
179 return ((size_t)p % n == 0);
183 static void add(struct sha256_ctx *ctx, const void *p, size_t len)
185 const unsigned char *data = p;
186 size_t bufsize = ctx->bytes % 64;
188 if (bufsize + len >= 64) {
189 // Fill the buffer, and process it.
190 memcpy(ctx->buf.u8 + bufsize, data, 64 - bufsize);
191 ctx->bytes += 64 - bufsize;
192 data += 64 - bufsize;
194 Transform(ctx->s, ctx->buf.u32);
199 // Process full chunks directly from the source.
200 if (alignment_ok(data, sizeof(uint32_t)))
201 Transform(ctx->s, (const uint32_t *)data);
203 memcpy(ctx->buf.u8, data, sizeof(ctx->buf));
204 Transform(ctx->s, ctx->buf.u32);
212 // Fill the buffer with what remains.
213 memcpy(ctx->buf.u8 + bufsize, data, len);
218 void sha256_init(struct sha256_ctx *ctx)
220 struct sha256_ctx init = SHA256_INIT;
224 void sha256_update_arr(struct sha256_ctx *ctx, const void *p,
225 size_t num, size_t size)
227 size_t total = num * size;
229 /* Don't overflow. */
230 assert(size == 0 || total / size == num);
235 void sha256_done(struct sha256_ctx *ctx, struct sha256 *res)
237 static const unsigned char pad[64] = {0x80};
241 sizedesc = cpu_to_be64(ctx->bytes << 3);
242 /* Add '1' bit to terminate, then all 0 bits, up to next block - 8. */
243 add(ctx, pad, 1 + ((119 - (ctx->bytes % 64)) % 64));
244 /* Add number of bits of data (big endian) */
245 add(ctx, &sizedesc, 8);
246 for (i = 0; i < sizeof(ctx->s) / sizeof(ctx->s[0]); i++)
247 res->u.u32[i] = cpu_to_be32(ctx->s[i]);
248 invalidate_sha256(ctx);
252 void sha256_arr(struct sha256 *sha, const void *p, size_t num, size_t size)
254 struct sha256_ctx ctx;
257 sha256_update_arr(&ctx, p, num, size);
258 sha256_done(&ctx, sha);
261 void sha256_u8(struct sha256_ctx *ctx, uint8_t v)
263 sha256_update_arr(ctx, &v, sizeof(v), 1);
266 void sha256_u16(struct sha256_ctx *ctx, uint16_t v)
268 sha256_update_arr(ctx, &v, sizeof(v), 1);
271 void sha256_u32(struct sha256_ctx *ctx, uint32_t v)
273 sha256_update_arr(ctx, &v, sizeof(v), 1);
276 void sha256_u64(struct sha256_ctx *ctx, uint64_t v)
278 sha256_update_arr(ctx, &v, sizeof(v), 1);
281 /* Add as little-endian */
282 void sha256_le16(struct sha256_ctx *ctx, uint16_t v)
284 leint16_t lev = cpu_to_le16(v);
285 sha256_update_arr(ctx, &lev, sizeof(lev), 1);
288 void sha256_le32(struct sha256_ctx *ctx, uint32_t v)
290 leint32_t lev = cpu_to_le32(v);
291 sha256_update_arr(ctx, &lev, sizeof(lev), 1);
294 void sha256_le64(struct sha256_ctx *ctx, uint64_t v)
296 leint64_t lev = cpu_to_le64(v);
297 sha256_update_arr(ctx, &lev, sizeof(lev), 1);
300 /* Add as big-endian */
301 void sha256_be16(struct sha256_ctx *ctx, uint16_t v)
303 beint16_t bev = cpu_to_be16(v);
304 sha256_update_arr(ctx, &bev, sizeof(bev), 1);
307 void sha256_be32(struct sha256_ctx *ctx, uint32_t v)
309 beint32_t bev = cpu_to_be32(v);
310 sha256_update_arr(ctx, &bev, sizeof(bev), 1);
313 void sha256_be64(struct sha256_ctx *ctx, uint64_t v)
315 beint64_t bev = cpu_to_be64(v);
316 sha256_update_arr(ctx, &bev, sizeof(bev), 1);