commit: 1219bfb6864b3207cac8d011b05c8a8e86fd056d
parent 644abc326a993a7727dace5a2e12b5752f09505f
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date: Sat, 14 Sep 2024 06:22:40 +0200
lib/sha512: import from suckless sbase
Diffstat:
| A | lib/sha512.c | 185 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | lib/sha512.h | 24 | ++++++++++++++++++++++++ |
2 files changed, 209 insertions(+), 0 deletions(-)
diff --git a/lib/sha512.c b/lib/sha512.c
@@ -0,0 +1,185 @@
+// public domain sha512 implementation based on fips180-3
+// SPDX-License-Identifier: 0BSD
+
+#include "sha512.h"
+
+#include <ctype.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static uint64_t
+ror(uint64_t n, int k)
+{
+ return (n >> k) | (n << (64 - k));
+}
+#define Ch(x, y, z) (z ^ (x & (y ^ z)))
+#define Maj(x, y, z) ((x & y) | (z & (x | y)))
+#define S0(x) (ror(x, 28) ^ ror(x, 34) ^ ror(x, 39))
+#define S1(x) (ror(x, 14) ^ ror(x, 18) ^ ror(x, 41))
+#define R0(x) (ror(x, 1) ^ ror(x, 8) ^ (x >> 7))
+#define R1(x) (ror(x, 19) ^ ror(x, 61) ^ (x >> 6))
+
+static const uint64_t K[80] = {
+ 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
+ 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
+ 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
+ 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
+ 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
+ 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
+ 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
+ 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
+ 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
+ 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
+ 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
+ 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
+ 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
+ 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
+ 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
+ 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
+ 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
+ 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
+ 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
+ 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL};
+
+static void
+processblock(struct sha512 *s, const uint8_t *buf)
+{
+ uint64_t W[80], t1, t2, a, b, c, d, e, f, g, h;
+ int i;
+
+ for(i = 0; i < 16; i++)
+ {
+ W[i] = (uint64_t)buf[8 * i] << 56;
+ W[i] |= (uint64_t)buf[8 * i + 1] << 48;
+ W[i] |= (uint64_t)buf[8 * i + 2] << 40;
+ W[i] |= (uint64_t)buf[8 * i + 3] << 32;
+ W[i] |= (uint64_t)buf[8 * i + 4] << 24;
+ W[i] |= (uint64_t)buf[8 * i + 5] << 16;
+ W[i] |= (uint64_t)buf[8 * i + 6] << 8;
+ W[i] |= buf[8 * i + 7];
+ }
+ for(; i < 80; i++)
+ W[i] = R1(W[i - 2]) + W[i - 7] + R0(W[i - 15]) + W[i - 16];
+ a = s->h[0];
+ b = s->h[1];
+ c = s->h[2];
+ d = s->h[3];
+ e = s->h[4];
+ f = s->h[5];
+ g = s->h[6];
+ h = s->h[7];
+ for(i = 0; i < 80; i++)
+ {
+ t1 = h + S1(e) + Ch(e, f, g) + K[i] + W[i];
+ t2 = S0(a) + Maj(a, b, c);
+ h = g;
+ g = f;
+ f = e;
+ e = d + t1;
+ d = c;
+ c = b;
+ b = a;
+ a = t1 + t2;
+ }
+ s->h[0] += a;
+ s->h[1] += b;
+ s->h[2] += c;
+ s->h[3] += d;
+ s->h[4] += e;
+ s->h[5] += f;
+ s->h[6] += g;
+ s->h[7] += h;
+}
+
+static void
+pad(struct sha512 *s)
+{
+ unsigned r = s->len % 128;
+
+ s->buf[r++] = 0x80;
+ if(r > 112)
+ {
+ memset(s->buf + r, 0, 128 - r);
+ r = 0;
+ processblock(s, s->buf);
+ }
+ memset(s->buf + r, 0, 120 - r);
+ s->len *= 8;
+ s->buf[120] = s->len >> 56;
+ s->buf[121] = s->len >> 48;
+ s->buf[122] = s->len >> 40;
+ s->buf[123] = s->len >> 32;
+ s->buf[124] = s->len >> 24;
+ s->buf[125] = s->len >> 16;
+ s->buf[126] = s->len >> 8;
+ s->buf[127] = s->len;
+ processblock(s, s->buf);
+}
+
+void
+sha512_init(void *ctx)
+{
+ struct sha512 *s = ctx;
+ s->len = 0;
+ s->h[0] = 0x6a09e667f3bcc908ULL;
+ s->h[1] = 0xbb67ae8584caa73bULL;
+ s->h[2] = 0x3c6ef372fe94f82bULL;
+ s->h[3] = 0xa54ff53a5f1d36f1ULL;
+ s->h[4] = 0x510e527fade682d1ULL;
+ s->h[5] = 0x9b05688c2b3e6c1fULL;
+ s->h[6] = 0x1f83d9abfb41bd6bULL;
+ s->h[7] = 0x5be0cd19137e2179ULL;
+}
+
+void
+sha512_sum_n(void *ctx, uint8_t *md, int n)
+{
+ struct sha512 *s = ctx;
+ int i;
+
+ pad(s);
+ for(i = 0; i < n; i++)
+ {
+ md[8 * i] = s->h[i] >> 56;
+ md[8 * i + 1] = s->h[i] >> 48;
+ md[8 * i + 2] = s->h[i] >> 40;
+ md[8 * i + 3] = s->h[i] >> 32;
+ md[8 * i + 4] = s->h[i] >> 24;
+ md[8 * i + 5] = s->h[i] >> 16;
+ md[8 * i + 6] = s->h[i] >> 8;
+ md[8 * i + 7] = s->h[i];
+ }
+}
+
+void
+sha512_sum(void *ctx, uint8_t md[SHA512_DIGEST_LENGTH])
+{
+ sha512_sum_n(ctx, md, 8);
+}
+
+void
+sha512_update(void *ctx, const void *m, unsigned long len)
+{
+ struct sha512 *s = ctx;
+ const uint8_t *p = m;
+ unsigned r = s->len % 128;
+
+ s->len += len;
+ if(r)
+ {
+ if(len < 128 - r)
+ {
+ memcpy(s->buf + r, p, len);
+ return;
+ }
+ memcpy(s->buf + r, p, 128 - r);
+ len -= 128 - r;
+ p += 128 - r;
+ processblock(s, s->buf);
+ }
+ for(; len >= 128; len -= 128, p += 128)
+ processblock(s, p);
+ memcpy(s->buf, p, len);
+}
diff --git a/lib/sha512.h b/lib/sha512.h
@@ -0,0 +1,24 @@
+// public domain sha512 implementation based on fips180-3
+// SPDX-License-Identifier: 0BSD
+#include <stdint.h>
+
+struct sha512
+{
+ uint64_t len; /* processed message length */
+ uint64_t h[8]; /* hash state */
+ uint8_t buf[128]; /* message block buffer */
+};
+
+enum
+{
+ SHA512_DIGEST_LENGTH = 64
+};
+
+/* reset state */
+void sha512_init(void *ctx);
+/* process message */
+void sha512_update(void *ctx, const void *m, unsigned long len);
+/* get message digest */
+/* state is ruined after sum, keep a copy if multiple sum is needed */
+/* part of the message might be left in s, zero it if secrecy is needed */
+void sha512_sum(void *ctx, uint8_t md[SHA512_DIGEST_LENGTH]);
