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diff --git a/lib/sha512.c b/lib/sha512.c
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+++ b/lib/sha512.c
@@ -0,0 +1,620 @@
+/*
+ * BIRD Library -- SHA-512 and SHA-384 Hash Functions,
+ * HMAC-SHA-512 and HMAC-SHA-384 Functions
+ *
+ * (c) 2015 CZ.NIC z.s.p.o.
+ *
+ * Based on the code from libgcrypt-1.6.0, which is
+ * (c) 2003, 2006, 2008, 2009 Free Software Foundation, Inc.
+ *
+ * Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#include "lib/sha512.h"
+#include "lib/unaligned.h"
+
+
+// #define SHA512_UNROLLED
+
+void
+sha512_init(struct sha512_context *ctx)
+{
+ ctx->h0 = U64(0x6a09e667f3bcc908);
+ ctx->h1 = U64(0xbb67ae8584caa73b);
+ ctx->h2 = U64(0x3c6ef372fe94f82b);
+ ctx->h3 = U64(0xa54ff53a5f1d36f1);
+ ctx->h4 = U64(0x510e527fade682d1);
+ ctx->h5 = U64(0x9b05688c2b3e6c1f);
+ ctx->h6 = U64(0x1f83d9abfb41bd6b);
+ ctx->h7 = U64(0x5be0cd19137e2179);
+
+ ctx->nblocks = 0;
+ ctx->count = 0;
+}
+
+void
+sha384_init(struct sha384_context *ctx)
+{
+ ctx->h0 = U64(0xcbbb9d5dc1059ed8);
+ ctx->h1 = U64(0x629a292a367cd507);
+ ctx->h2 = U64(0x9159015a3070dd17);
+ ctx->h3 = U64(0x152fecd8f70e5939);
+ ctx->h4 = U64(0x67332667ffc00b31);
+ ctx->h5 = U64(0x8eb44a8768581511);
+ ctx->h6 = U64(0xdb0c2e0d64f98fa7);
+ ctx->h7 = U64(0x47b5481dbefa4fa4);
+
+ ctx->nblocks = 0;
+ ctx->count = 0;
+}
+
+static inline u64
+ROTR(u64 x, u64 n)
+{
+ return ((x >> n) | (x << (64 - n)));
+}
+
+static inline u64
+Ch(u64 x, u64 y, u64 z)
+{
+ return ((x & y) ^ ( ~x & z));
+}
+
+static inline u64
+Maj(u64 x, u64 y, u64 z)
+{
+ return ((x & y) ^ (x & z) ^ (y & z));
+}
+
+static inline u64
+sum0(u64 x)
+{
+ return (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39));
+}
+
+static inline u64
+sum1(u64 x)
+{
+ return (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41));
+}
+
+static const u64 k[] =
+{
+ U64(0x428a2f98d728ae22), U64(0x7137449123ef65cd),
+ U64(0xb5c0fbcfec4d3b2f), U64(0xe9b5dba58189dbbc),
+ U64(0x3956c25bf348b538), U64(0x59f111f1b605d019),
+ U64(0x923f82a4af194f9b), U64(0xab1c5ed5da6d8118),
+ U64(0xd807aa98a3030242), U64(0x12835b0145706fbe),
+ U64(0x243185be4ee4b28c), U64(0x550c7dc3d5ffb4e2),
+ U64(0x72be5d74f27b896f), U64(0x80deb1fe3b1696b1),
+ U64(0x9bdc06a725c71235), U64(0xc19bf174cf692694),
+ U64(0xe49b69c19ef14ad2), U64(0xefbe4786384f25e3),
+ U64(0x0fc19dc68b8cd5b5), U64(0x240ca1cc77ac9c65),
+ U64(0x2de92c6f592b0275), U64(0x4a7484aa6ea6e483),
+ U64(0x5cb0a9dcbd41fbd4), U64(0x76f988da831153b5),
+ U64(0x983e5152ee66dfab), U64(0xa831c66d2db43210),
+ U64(0xb00327c898fb213f), U64(0xbf597fc7beef0ee4),
+ U64(0xc6e00bf33da88fc2), U64(0xd5a79147930aa725),
+ U64(0x06ca6351e003826f), U64(0x142929670a0e6e70),
+ U64(0x27b70a8546d22ffc), U64(0x2e1b21385c26c926),
+ U64(0x4d2c6dfc5ac42aed), U64(0x53380d139d95b3df),
+ U64(0x650a73548baf63de), U64(0x766a0abb3c77b2a8),
+ U64(0x81c2c92e47edaee6), U64(0x92722c851482353b),
+ U64(0xa2bfe8a14cf10364), U64(0xa81a664bbc423001),
+ U64(0xc24b8b70d0f89791), U64(0xc76c51a30654be30),
+ U64(0xd192e819d6ef5218), U64(0xd69906245565a910),
+ U64(0xf40e35855771202a), U64(0x106aa07032bbd1b8),
+ U64(0x19a4c116b8d2d0c8), U64(0x1e376c085141ab53),
+ U64(0x2748774cdf8eeb99), U64(0x34b0bcb5e19b48a8),
+ U64(0x391c0cb3c5c95a63), U64(0x4ed8aa4ae3418acb),
+ U64(0x5b9cca4f7763e373), U64(0x682e6ff3d6b2b8a3),
+ U64(0x748f82ee5defb2fc), U64(0x78a5636f43172f60),
+ U64(0x84c87814a1f0ab72), U64(0x8cc702081a6439ec),
+ U64(0x90befffa23631e28), U64(0xa4506cebde82bde9),
+ U64(0xbef9a3f7b2c67915), U64(0xc67178f2e372532b),
+ U64(0xca273eceea26619c), U64(0xd186b8c721c0c207),
+ U64(0xeada7dd6cde0eb1e), U64(0xf57d4f7fee6ed178),
+ U64(0x06f067aa72176fba), U64(0x0a637dc5a2c898a6),
+ U64(0x113f9804bef90dae), U64(0x1b710b35131c471b),
+ U64(0x28db77f523047d84), U64(0x32caab7b40c72493),
+ U64(0x3c9ebe0a15c9bebc), U64(0x431d67c49c100d4c),
+ U64(0x4cc5d4becb3e42b6), U64(0x597f299cfc657e2a),
+ U64(0x5fcb6fab3ad6faec), U64(0x6c44198c4a475817)
+};
+
+/*
+ * Transform the message W which consists of 16 64-bit-words
+ */
+static uint
+sha512_transform(struct sha512_context *ctx, const byte *data)
+{
+ u64 a, b, c, d, e, f, g, h;
+ u64 w[16];
+ uint t;
+
+ /* get values from the chaining vars */
+ a = ctx->h0;
+ b = ctx->h1;
+ c = ctx->h2;
+ d = ctx->h3;
+ e = ctx->h4;
+ f = ctx->h5;
+ g = ctx->h6;
+ h = ctx->h7;
+
+ for (t = 0; t < 16; t++)
+ w[t] = get_u64(data + t * 8);
+
+#define S0(x) (ROTR((x),1) ^ ROTR((x),8) ^ ((x)>>7))
+#define S1(x) (ROTR((x),19) ^ ROTR((x),61) ^ ((x)>>6))
+
+ for (t = 0; t < 80 - 16; )
+ {
+ u64 t1, t2;
+
+ /* Performance on a AMD Athlon(tm) Dual Core Processor 4050e
+ with gcc 4.3.3 using gcry_md_hash_buffer of each 10000 bytes
+ initialized to 0,1,2,3...255,0,... and 1000 iterations:
+
+ Not unrolled with macros: 440ms
+ Unrolled with macros: 350ms
+ Unrolled with inline: 330ms
+ */
+#ifndef SHA512_UNROLLED
+ t1 = h + sum1(e) + Ch(e, f, g) + k[t] + w[t%16];
+ w[t%16] += S1(w[(t - 2)%16]) + w[(t - 7)%16] + S0(w[(t - 15)%16]);
+ t2 = sum0(a) + Maj(a, b, c);
+ h = g;
+ g = f;
+ f = e;
+ e = d + t1;
+ d = c;
+ c = b;
+ b = a;
+ a = t1 + t2;
+ t++;
+#else /* Unrolled */
+ t1 = h + sum1(e) + Ch(e, f, g) + k[t] + w[0];
+ w[0] += S1(w[14]) + w[9] + S0(w[1]);
+ t2 = sum0(a) + Maj(a, b, c);
+ d += t1;
+ h = t1 + t2;
+
+ t1 = g + sum1(d) + Ch(d, e, f) + k[t+1] + w[1];
+ w[1] += S1(w[15]) + w[10] + S0(w[2]);
+ t2 = sum0(h) + Maj(h, a, b);
+ c += t1;
+ g = t1 + t2;
+
+ t1 = f + sum1(c) + Ch(c, d, e) + k[t+2] + w[2];
+ w[2] += S1(w[0]) + w[11] + S0(w[3]);
+ t2 = sum0(g) + Maj(g, h, a);
+ b += t1;
+ f = t1 + t2;
+
+ t1 = e + sum1(b) + Ch(b, c, d) + k[t+3] + w[3];
+ w[3] += S1(w[1]) + w[12] + S0(w[4]);
+ t2 = sum0(f) + Maj(f, g, h);
+ a += t1;
+ e = t1 + t2;
+
+ t1 = d + sum1(a) + Ch(a, b, c) + k[t+4] + w[4];
+ w[4] += S1(w[2]) + w[13] + S0(w[5]);
+ t2 = sum0(e) + Maj(e, f, g);
+ h += t1;
+ d = t1 + t2;
+
+ t1 = c + sum1(h) + Ch(h, a, b) + k[t+5] + w[5];
+ w[5] += S1(w[3]) + w[14] + S0(w[6]);
+ t2 = sum0(d) + Maj(d, e, f);
+ g += t1;
+ c = t1 + t2;
+
+ t1 = b + sum1(g) + Ch(g, h, a) + k[t+6] + w[6];
+ w[6] += S1(w[4]) + w[15] + S0(w[7]);
+ t2 = sum0(c) + Maj(c, d, e);
+ f += t1;
+ b = t1 + t2;
+
+ t1 = a + sum1(f) + Ch(f, g, h) + k[t+7] + w[7];
+ w[7] += S1(w[5]) + w[0] + S0(w[8]);
+ t2 = sum0(b) + Maj(b, c, d);
+ e += t1;
+ a = t1 + t2;
+
+ t1 = h + sum1(e) + Ch(e, f, g) + k[t+8] + w[8];
+ w[8] += S1(w[6]) + w[1] + S0(w[9]);
+ t2 = sum0(a) + Maj(a, b, c);
+ d += t1;
+ h = t1 + t2;
+
+ t1 = g + sum1(d) + Ch(d, e, f) + k[t+9] + w[9];
+ w[9] += S1(w[7]) + w[2] + S0(w[10]);
+ t2 = sum0(h) + Maj(h, a, b);
+ c += t1;
+ g = t1 + t2;
+
+ t1 = f + sum1(c) + Ch(c, d, e) + k[t+10] + w[10];
+ w[10] += S1(w[8]) + w[3] + S0(w[11]);
+ t2 = sum0(g) + Maj(g, h, a);
+ b += t1;
+ f = t1 + t2;
+
+ t1 = e + sum1(b) + Ch(b, c, d) + k[t+11] + w[11];
+ w[11] += S1(w[9]) + w[4] + S0(w[12]);
+ t2 = sum0(f) + Maj(f, g, h);
+ a += t1;
+ e = t1 + t2;
+
+ t1 = d + sum1(a) + Ch(a, b, c) + k[t+12] + w[12];
+ w[12] += S1(w[10]) + w[5] + S0(w[13]);
+ t2 = sum0(e) + Maj(e, f, g);
+ h += t1;
+ d = t1 + t2;
+
+ t1 = c + sum1(h) + Ch(h, a, b) + k[t+13] + w[13];
+ w[13] += S1(w[11]) + w[6] + S0(w[14]);
+ t2 = sum0(d) + Maj(d, e, f);
+ g += t1;
+ c = t1 + t2;
+
+ t1 = b + sum1(g) + Ch(g, h, a) + k[t+14] + w[14];
+ w[14] += S1(w[12]) + w[7] + S0(w[15]);
+ t2 = sum0(c) + Maj(c, d, e);
+ f += t1;
+ b = t1 + t2;
+
+ t1 = a + sum1(f) + Ch(f, g, h) + k[t+15] + w[15];
+ w[15] += S1(w[13]) + w[8] + S0(w[0]);
+ t2 = sum0(b) + Maj(b, c, d);
+ e += t1;
+ a = t1 + t2;
+
+ t += 16;
+#endif
+ }
+
+ for (; t < 80; )
+ {
+ u64 t1, t2;
+
+#ifndef SHA512_UNROLLED
+ t1 = h + sum1(e) + Ch(e, f, g) + k[t] + w[t%16];
+ t2 = sum0(a) + Maj(a, b, c);
+ h = g;
+ g = f;
+ f = e;
+ e = d + t1;
+ d = c;
+ c = b;
+ b = a;
+ a = t1 + t2;
+ t++;
+#else /* Unrolled */
+ t1 = h + sum1(e) + Ch(e, f, g) + k[t] + w[0];
+ t2 = sum0(a) + Maj(a, b, c);
+ d += t1;
+ h = t1 + t2;
+
+ t1 = g + sum1(d) + Ch(d, e, f) + k[t+1] + w[1];
+ t2 = sum0(h) + Maj(h, a, b);
+ c += t1;
+ g = t1 + t2;
+
+ t1 = f + sum1(c) + Ch(c, d, e) + k[t+2] + w[2];
+ t2 = sum0(g) + Maj(g, h, a);
+ b += t1;
+ f = t1 + t2;
+
+ t1 = e + sum1(b) + Ch(b, c, d) + k[t+3] + w[3];
+ t2 = sum0(f) + Maj(f, g, h);
+ a += t1;
+ e = t1 + t2;
+
+ t1 = d + sum1(a) + Ch(a, b, c) + k[t+4] + w[4];
+ t2 = sum0(e) + Maj(e, f, g);
+ h += t1;
+ d = t1 + t2;
+
+ t1 = c + sum1(h) + Ch(h, a, b) + k[t+5] + w[5];
+ t2 = sum0(d) + Maj(d, e, f);
+ g += t1;
+ c = t1 + t2;
+
+ t1 = b + sum1(g) + Ch(g, h, a) + k[t+6] + w[6];
+ t2 = sum0(c) + Maj(c, d, e);
+ f += t1;
+ b = t1 + t2;
+
+ t1 = a + sum1(f) + Ch(f, g, h) + k[t+7] + w[7];
+ t2 = sum0(b) + Maj(b, c, d);
+ e += t1;
+ a = t1 + t2;
+
+ t1 = h + sum1(e) + Ch(e, f, g) + k[t+8] + w[8];
+ t2 = sum0(a) + Maj(a, b, c);
+ d += t1;
+ h = t1 + t2;
+
+ t1 = g + sum1(d) + Ch(d, e, f) + k[t+9] + w[9];
+ t2 = sum0(h) + Maj(h, a, b);
+ c += t1;
+ g = t1 + t2;
+
+ t1 = f + sum1(c) + Ch(c, d, e) + k[t+10] + w[10];
+ t2 = sum0(g) + Maj(g, h, a);
+ b += t1;
+ f = t1 + t2;
+
+ t1 = e + sum1(b) + Ch(b, c, d) + k[t+11] + w[11];
+ t2 = sum0(f) + Maj(f, g, h);
+ a += t1;
+ e = t1 + t2;
+
+ t1 = d + sum1(a) + Ch(a, b, c) + k[t+12] + w[12];
+ t2 = sum0(e) + Maj(e, f, g);
+ h += t1;
+ d = t1 + t2;
+
+ t1 = c + sum1(h) + Ch(h, a, b) + k[t+13] + w[13];
+ t2 = sum0(d) + Maj(d, e, f);
+ g += t1;
+ c = t1 + t2;
+
+ t1 = b + sum1(g) + Ch(g, h, a) + k[t+14] + w[14];
+ t2 = sum0(c) + Maj(c, d, e);
+ f += t1;
+ b = t1 + t2;
+
+ t1 = a + sum1(f) + Ch(f, g, h) + k[t+15] + w[15];
+ t2 = sum0(b) + Maj(b, c, d);
+ e += t1;
+ a = t1 + t2;
+
+ t += 16;
+#endif
+ }
+
+ /* Update chaining vars. */
+ ctx->h0 += a;
+ ctx->h1 += b;
+ ctx->h2 += c;
+ ctx->h3 += d;
+ ctx->h4 += e;
+ ctx->h5 += f;
+ ctx->h6 += g;
+ ctx->h7 += h;
+
+ return /* burn_stack */ (8 + 16) * sizeof(u64) + sizeof(u32) + 3 * sizeof(void*);
+}
+
+void
+sha512_update(struct sha512_context *ctx, const byte *buf, size_t len)
+{
+ if (ctx->count)
+ {
+ /* Fill rest of internal buffer */
+ for (; len && ctx->count < SHA512_BLOCK_SIZE; len--)
+ ctx->buf[ctx->count++] = *buf++;
+
+ if (ctx->count < SHA512_BLOCK_SIZE)
+ return;
+
+ /* Process data from internal buffer */
+ sha512_transform(ctx, ctx->buf);
+ ctx->nblocks++;
+ ctx->count = 0;
+ }
+
+ if (!len)
+ return;
+
+ /* Process data from input buffer */
+ while (len >= SHA512_BLOCK_SIZE)
+ {
+ sha512_transform(ctx, buf);
+ ctx->nblocks++;
+ buf += SHA512_BLOCK_SIZE;
+ len -= SHA512_BLOCK_SIZE;
+ }
+
+ /* Copy remaining data to internal buffer */
+ memcpy(ctx->buf, buf, len);
+ ctx->count = len;
+}
+
+/*
+ * The routine final terminates the computation and returns the digest. The
+ * handle is prepared for a new cycle, but adding bytes to the handle will the
+ * destroy the returned buffer.
+ *
+ * Returns: 64 bytes representing the digest. When used for sha384, we take the
+ * first 48 of those bytes.
+ */
+byte *
+sha512_final(struct sha512_context *ctx)
+{
+ u64 t, th, msb, lsb;
+
+ sha512_update(ctx, NULL, 0); /* flush */
+
+ t = ctx->nblocks;
+ th = 0;
+
+ /* multiply by 128 to make a byte count */
+ lsb = t << 7;
+ msb = (th << 7) | (t >> 57);
+ /* add the count */
+ t = lsb;
+ if ((lsb += ctx->count) < t)
+ msb++;
+ /* multiply by 8 to make a bit count */
+ t = lsb;
+ lsb <<= 3;
+ msb <<= 3;
+ msb |= t >> 61;
+
+ if (ctx->count < 112)
+ {
+ /* enough room */
+ ctx->buf[ctx->count++] = 0x80; /* pad */
+ while(ctx->count < 112)
+ ctx->buf[ctx->count++] = 0; /* pad */
+ }
+ else
+ {
+ /* need one extra block */
+ ctx->buf[ctx->count++] = 0x80; /* pad character */
+ while(ctx->count < 128)
+ ctx->buf[ctx->count++] = 0;
+ sha512_update(ctx, NULL, 0); /* flush */
+ memset(ctx->buf, 0, 112); /* fill next block with zeroes */
+ }
+
+ /* append the 128 bit count */
+ put_u64(ctx->buf + 112, msb);
+ put_u64(ctx->buf + 120, lsb);
+ sha512_transform(ctx, ctx->buf);
+
+ byte *p = ctx->buf;
+#define X(a) do { put_u64(p, ctx->h##a); p += 8; } while(0)
+ X(0);
+ X(1);
+ X(2);
+ X(3);
+ X(4);
+ X(5);
+ X(6);
+ X(7);
+#undef X
+
+ return ctx->buf;
+}
+
+
+/*
+ * SHA512-HMAC
+ */
+
+static void
+sha512_hash_buffer(byte *outbuf, const byte *buffer, size_t length)
+{
+ struct sha512_context ctx;
+
+ sha512_init(&ctx);
+ sha512_update(&ctx, buffer, length);
+ memcpy(outbuf, sha512_final(&ctx), SHA512_SIZE);
+}
+
+void
+sha512_hmac_init(struct sha512_hmac_context *ctx, const byte *key, size_t keylen)
+{
+ byte keybuf[SHA512_BLOCK_SIZE], buf[SHA512_BLOCK_SIZE];
+
+ /* Hash the key if necessary */
+ if (keylen <= SHA512_BLOCK_SIZE)
+ {
+ memcpy(keybuf, key, keylen);
+ memset(keybuf + keylen, 0, SHA512_BLOCK_SIZE - keylen);
+ }
+ else
+ {
+ sha512_hash_buffer(keybuf, key, keylen);
+ memset(keybuf + SHA512_SIZE, 0, SHA512_BLOCK_SIZE - SHA512_SIZE);
+ }
+
+ /* Initialize the inner digest */
+ sha512_init(&ctx->ictx);
+ int i;
+ for (i = 0; i < SHA512_BLOCK_SIZE; i++)
+ buf[i] = keybuf[i] ^ 0x36;
+ sha512_update(&ctx->ictx, buf, SHA512_BLOCK_SIZE);
+
+ /* Initialize the outer digest */
+ sha512_init(&ctx->octx);
+ for (i = 0; i < SHA512_BLOCK_SIZE; i++)
+ buf[i] = keybuf[i] ^ 0x5c;
+ sha512_update(&ctx->octx, buf, SHA512_BLOCK_SIZE);
+}
+
+void
+sha512_hmac_update(struct sha512_hmac_context *ctx, const byte *buf, size_t buflen)
+{
+ /* Just update the inner digest */
+ sha512_update(&ctx->ictx, buf, buflen);
+}
+
+byte *
+sha512_hmac_final(struct sha512_hmac_context *ctx)
+{
+ /* Finish the inner digest */
+ byte *isha = sha512_final(&ctx->ictx);
+
+ /* Finish the outer digest */
+ sha512_update(&ctx->octx, isha, SHA512_SIZE);
+ return sha512_final(&ctx->octx);
+}
+
+
+/*
+ * SHA384-HMAC
+ */
+
+static void
+sha384_hash_buffer(byte *outbuf, const byte *buffer, size_t length)
+{
+ struct sha384_context ctx;
+
+ sha384_init(&ctx);
+ sha384_update(&ctx, buffer, length);
+ memcpy(outbuf, sha384_final(&ctx), SHA384_SIZE);
+}
+
+void
+sha384_hmac_init(struct sha384_hmac_context *ctx, const byte *key, size_t keylen)
+{
+ byte keybuf[SHA384_BLOCK_SIZE], buf[SHA384_BLOCK_SIZE];
+
+ /* Hash the key if necessary */
+ if (keylen <= SHA384_BLOCK_SIZE)
+ {
+ memcpy(keybuf, key, keylen);
+ memset(keybuf + keylen, 0, SHA384_BLOCK_SIZE - keylen);
+ }
+ else
+ {
+ sha384_hash_buffer(keybuf, key, keylen);
+ memset(keybuf + SHA384_SIZE, 0, SHA384_BLOCK_SIZE - SHA384_SIZE);
+ }
+
+ /* Initialize the inner digest */
+ sha384_init(&ctx->ictx);
+ int i;
+ for (i = 0; i < SHA384_BLOCK_SIZE; i++)
+ buf[i] = keybuf[i] ^ 0x36;
+ sha384_update(&ctx->ictx, buf, SHA384_BLOCK_SIZE);
+
+ /* Initialize the outer digest */
+ sha384_init(&ctx->octx);
+ for (i = 0; i < SHA384_BLOCK_SIZE; i++)
+ buf[i] = keybuf[i] ^ 0x5c;
+ sha384_update(&ctx->octx, buf, SHA384_BLOCK_SIZE);
+}
+
+void
+sha384_hmac_update(struct sha384_hmac_context *ctx, const byte *buf, size_t buflen)
+{
+ /* Just update the inner digest */
+ sha384_update(&ctx->ictx, buf, buflen);
+}
+
+byte *
+sha384_hmac_final(struct sha384_hmac_context *ctx)
+{
+ /* Finish the inner digest */
+ byte *isha = sha384_final(&ctx->ictx);
+
+ /* Finish the outer digest */
+ sha384_update(&ctx->octx, isha, SHA384_SIZE);
+ return sha384_final(&ctx->octx);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 16:59:43 +0000