summaryrefslogtreecommitdiff
path: root/plugins/MirOTR/Libgcrypt/cipher/sha256.c
diff options
context:
space:
mode:
Diffstat (limited to 'plugins/MirOTR/Libgcrypt/cipher/sha256.c')
-rw-r--r--plugins/MirOTR/Libgcrypt/cipher/sha256.c554
1 files changed, 554 insertions, 0 deletions
diff --git a/plugins/MirOTR/Libgcrypt/cipher/sha256.c b/plugins/MirOTR/Libgcrypt/cipher/sha256.c
new file mode 100644
index 0000000000..8063592f75
--- /dev/null
+++ b/plugins/MirOTR/Libgcrypt/cipher/sha256.c
@@ -0,0 +1,554 @@
+/* sha256.c - SHA256 hash function
+ * Copyright (C) 2003, 2006, 2008, 2009 Free Software Foundation, Inc.
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+/* Test vectors:
+
+ "abc"
+ SHA224: 23097d22 3405d822 8642a477 bda255b3 2aadbce4 bda0b3f7 e36c9da7
+ SHA256: ba7816bf 8f01cfea 414140de 5dae2223 b00361a3 96177a9c b410ff61 f20015ad
+
+ "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
+ SHA224: 75388b16 512776cc 5dba5da1 fd890150 b0c6455c b4f58b19 52522525
+ SHA256: 248d6a61 d20638b8 e5c02693 0c3e6039 a33ce459 64ff2167 f6ecedd4 19db06c1
+
+ "a" one million times
+ SHA224: 20794655 980c91d8 bbb4c1ea 97618a4b f03f4258 1948b2ee 4ee7ad67
+ SHA256: cdc76e5c 9914fb92 81a1c7e2 84d73e67 f1809a48 a497200e 046d39cc c7112cd0
+
+ */
+
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "g10lib.h"
+#include "bithelp.h"
+#include "cipher.h"
+#include "hash-common.h"
+
+typedef struct {
+ u32 h0,h1,h2,h3,h4,h5,h6,h7;
+ u32 nblocks;
+ byte buf[64];
+ int count;
+} SHA256_CONTEXT;
+
+
+static void
+sha256_init (void *context)
+{
+ SHA256_CONTEXT *hd = context;
+
+ hd->h0 = 0x6a09e667;
+ hd->h1 = 0xbb67ae85;
+ hd->h2 = 0x3c6ef372;
+ hd->h3 = 0xa54ff53a;
+ hd->h4 = 0x510e527f;
+ hd->h5 = 0x9b05688c;
+ hd->h6 = 0x1f83d9ab;
+ hd->h7 = 0x5be0cd19;
+
+ hd->nblocks = 0;
+ hd->count = 0;
+}
+
+
+static void
+sha224_init (void *context)
+{
+ SHA256_CONTEXT *hd = context;
+
+ hd->h0 = 0xc1059ed8;
+ hd->h1 = 0x367cd507;
+ hd->h2 = 0x3070dd17;
+ hd->h3 = 0xf70e5939;
+ hd->h4 = 0xffc00b31;
+ hd->h5 = 0x68581511;
+ hd->h6 = 0x64f98fa7;
+ hd->h7 = 0xbefa4fa4;
+
+ hd->nblocks = 0;
+ hd->count = 0;
+}
+
+
+/*
+ Transform the message X which consists of 16 32-bit-words. See FIPS
+ 180-2 for details. */
+#define S0(x) (ror ((x), 7) ^ ror ((x), 18) ^ ((x) >> 3)) /* (4.6) */
+#define S1(x) (ror ((x), 17) ^ ror ((x), 19) ^ ((x) >> 10)) /* (4.7) */
+#define R(a,b,c,d,e,f,g,h,k,w) do \
+ { \
+ t1 = (h) + Sum1((e)) + Cho((e),(f),(g)) + (k) + (w); \
+ 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; \
+ } while (0)
+
+/* (4.2) same as SHA-1's F1. */
+static inline u32
+Cho (u32 x, u32 y, u32 z)
+{
+ return (z ^ (x & (y ^ z)));
+}
+
+/* (4.3) same as SHA-1's F3 */
+static inline u32
+Maj (u32 x, u32 y, u32 z)
+{
+ return ((x & y) | (z & (x|y)));
+}
+
+/* (4.4) */
+static inline u32
+Sum0 (u32 x)
+{
+ return (ror (x, 2) ^ ror (x, 13) ^ ror (x, 22));
+}
+
+/* (4.5) */
+static inline u32
+Sum1 (u32 x)
+{
+ return (ror (x, 6) ^ ror (x, 11) ^ ror (x, 25));
+}
+
+
+static void
+transform (SHA256_CONTEXT *hd, const unsigned char *data)
+{
+ static const u32 K[64] = {
+ 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
+ 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
+ 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
+ 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
+ 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
+ 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
+ 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
+ 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
+ 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
+ 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
+ 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
+ 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
+ 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
+ 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
+ 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
+ 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
+ };
+
+ u32 a,b,c,d,e,f,g,h,t1,t2;
+ u32 x[16];
+ u32 w[64];
+ int i;
+
+ a = hd->h0;
+ b = hd->h1;
+ c = hd->h2;
+ d = hd->h3;
+ e = hd->h4;
+ f = hd->h5;
+ g = hd->h6;
+ h = hd->h7;
+
+#ifdef WORDS_BIGENDIAN
+ memcpy (x, data, 64);
+#else
+ {
+ byte *p2;
+
+ for (i=0, p2=(byte*)x; i < 16; i++, p2 += 4 )
+ {
+ p2[3] = *data++;
+ p2[2] = *data++;
+ p2[1] = *data++;
+ p2[0] = *data++;
+ }
+ }
+#endif
+
+ for (i=0; i < 16; i++)
+ w[i] = x[i];
+ for (; i < 64; i++)
+ w[i] = S1(w[i-2]) + w[i-7] + S0(w[i-15]) + w[i-16];
+
+ for (i=0; i < 64;)
+ {
+#if 0
+ R(a,b,c,d,e,f,g,h,K[i],w[i]);
+ i++;
+#else
+ t1 = h + Sum1 (e) + Cho (e, f, g) + K[i] + w[i];
+ t2 = Sum0 (a) + Maj (a, b, c);
+ d += t1;
+ h = t1 + t2;
+
+ t1 = g + Sum1 (d) + Cho (d, e, f) + K[i+1] + w[i+1];
+ t2 = Sum0 (h) + Maj (h, a, b);
+ c += t1;
+ g = t1 + t2;
+
+ t1 = f + Sum1 (c) + Cho (c, d, e) + K[i+2] + w[i+2];
+ t2 = Sum0 (g) + Maj (g, h, a);
+ b += t1;
+ f = t1 + t2;
+
+ t1 = e + Sum1 (b) + Cho (b, c, d) + K[i+3] + w[i+3];
+ t2 = Sum0 (f) + Maj (f, g, h);
+ a += t1;
+ e = t1 + t2;
+
+ t1 = d + Sum1 (a) + Cho (a, b, c) + K[i+4] + w[i+4];
+ t2 = Sum0 (e) + Maj (e, f, g);
+ h += t1;
+ d = t1 + t2;
+
+ t1 = c + Sum1 (h) + Cho (h, a, b) + K[i+5] + w[i+5];
+ t2 = Sum0 (d) + Maj (d, e, f);
+ g += t1;
+ c = t1 + t2;
+
+ t1 = b + Sum1 (g) + Cho (g, h, a) + K[i+6] + w[i+6];
+ t2 = Sum0 (c) + Maj (c, d, e);
+ f += t1;
+ b = t1 + t2;
+
+ t1 = a + Sum1 (f) + Cho (f, g, h) + K[i+7] + w[i+7];
+ t2 = Sum0 (b) + Maj (b, c, d);
+ e += t1;
+ a = t1 + t2;
+
+ i += 8;
+#endif
+ }
+
+ hd->h0 += a;
+ hd->h1 += b;
+ hd->h2 += c;
+ hd->h3 += d;
+ hd->h4 += e;
+ hd->h5 += f;
+ hd->h6 += g;
+ hd->h7 += h;
+}
+#undef S0
+#undef S1
+#undef R
+
+
+/* Update the message digest with the contents of INBUF with length
+ INLEN. */
+static void
+sha256_write (void *context, const void *inbuf_arg, size_t inlen)
+{
+ const unsigned char *inbuf = inbuf_arg;
+ SHA256_CONTEXT *hd = context;
+
+ if (hd->count == 64)
+ { /* flush the buffer */
+ transform (hd, hd->buf);
+ _gcry_burn_stack (74*4+32);
+ hd->count = 0;
+ hd->nblocks++;
+ }
+ if (!inbuf)
+ return;
+ if (hd->count)
+ {
+ for (; inlen && hd->count < 64; inlen--)
+ hd->buf[hd->count++] = *inbuf++;
+ sha256_write (hd, NULL, 0);
+ if (!inlen)
+ return;
+ }
+
+ while (inlen >= 64)
+ {
+ transform (hd, inbuf);
+ hd->count = 0;
+ hd->nblocks++;
+ inlen -= 64;
+ inbuf += 64;
+ }
+ _gcry_burn_stack (74*4+32);
+ for (; inlen && hd->count < 64; inlen--)
+ hd->buf[hd->count++] = *inbuf++;
+}
+
+
+/*
+ The routine finally 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: 32
+ bytes with the message the digest. */
+static void
+sha256_final(void *context)
+{
+ SHA256_CONTEXT *hd = context;
+ u32 t, msb, lsb;
+ byte *p;
+
+ sha256_write (hd, NULL, 0); /* flush */;
+
+ t = hd->nblocks;
+ /* multiply by 64 to make a byte count */
+ lsb = t << 6;
+ msb = t >> 26;
+ /* add the count */
+ t = lsb;
+ if ((lsb += hd->count) < t)
+ msb++;
+ /* multiply by 8 to make a bit count */
+ t = lsb;
+ lsb <<= 3;
+ msb <<= 3;
+ msb |= t >> 29;
+
+ if (hd->count < 56)
+ { /* enough room */
+ hd->buf[hd->count++] = 0x80; /* pad */
+ while (hd->count < 56)
+ hd->buf[hd->count++] = 0; /* pad */
+ }
+ else
+ { /* need one extra block */
+ hd->buf[hd->count++] = 0x80; /* pad character */
+ while (hd->count < 64)
+ hd->buf[hd->count++] = 0;
+ sha256_write (hd, NULL, 0); /* flush */;
+ memset (hd->buf, 0, 56 ); /* fill next block with zeroes */
+ }
+ /* append the 64 bit count */
+ hd->buf[56] = msb >> 24;
+ hd->buf[57] = msb >> 16;
+ hd->buf[58] = msb >> 8;
+ hd->buf[59] = msb;
+ hd->buf[60] = lsb >> 24;
+ hd->buf[61] = lsb >> 16;
+ hd->buf[62] = lsb >> 8;
+ hd->buf[63] = lsb;
+ transform (hd, hd->buf);
+ _gcry_burn_stack (74*4+32);
+
+ p = hd->buf;
+#ifdef WORDS_BIGENDIAN
+#define X(a) do { *(u32*)p = hd->h##a ; p += 4; } while(0)
+#else /* little endian */
+#define X(a) do { *p++ = hd->h##a >> 24; *p++ = hd->h##a >> 16; \
+ *p++ = hd->h##a >> 8; *p++ = hd->h##a; } while(0)
+#endif
+ X(0);
+ X(1);
+ X(2);
+ X(3);
+ X(4);
+ X(5);
+ X(6);
+ X(7);
+#undef X
+}
+
+static byte *
+sha256_read (void *context)
+{
+ SHA256_CONTEXT *hd = context;
+
+ return hd->buf;
+}
+
+
+
+/*
+ Self-test section.
+ */
+
+
+static gpg_err_code_t
+selftests_sha224 (int extended, selftest_report_func_t report)
+{
+ const char *what;
+ const char *errtxt;
+
+ what = "short string";
+ errtxt = _gcry_hash_selftest_check_one
+ (GCRY_MD_SHA224, 0,
+ "abc", 3,
+ "\x23\x09\x7d\x22\x34\x05\xd8\x22\x86\x42\xa4\x77\xbd\xa2\x55\xb3"
+ "\x2a\xad\xbc\xe4\xbd\xa0\xb3\xf7\xe3\x6c\x9d\xa7", 28);
+ if (errtxt)
+ goto failed;
+
+ if (extended)
+ {
+ what = "long string";
+ errtxt = _gcry_hash_selftest_check_one
+ (GCRY_MD_SHA224, 0,
+ "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 56,
+ "\x75\x38\x8b\x16\x51\x27\x76\xcc\x5d\xba\x5d\xa1\xfd\x89\x01\x50"
+ "\xb0\xc6\x45\x5c\xb4\xf5\x8b\x19\x52\x52\x25\x25", 28);
+ if (errtxt)
+ goto failed;
+
+ what = "one million \"a\"";
+ errtxt = _gcry_hash_selftest_check_one
+ (GCRY_MD_SHA224, 1,
+ NULL, 0,
+ "\x20\x79\x46\x55\x98\x0c\x91\xd8\xbb\xb4\xc1\xea\x97\x61\x8a\x4b"
+ "\xf0\x3f\x42\x58\x19\x48\xb2\xee\x4e\xe7\xad\x67", 28);
+ if (errtxt)
+ goto failed;
+ }
+
+ return 0; /* Succeeded. */
+
+ failed:
+ if (report)
+ report ("digest", GCRY_MD_SHA224, what, errtxt);
+ return GPG_ERR_SELFTEST_FAILED;
+}
+
+static gpg_err_code_t
+selftests_sha256 (int extended, selftest_report_func_t report)
+{
+ const char *what;
+ const char *errtxt;
+
+ what = "short string";
+ errtxt = _gcry_hash_selftest_check_one
+ (GCRY_MD_SHA256, 0,
+ "abc", 3,
+ "\xba\x78\x16\xbf\x8f\x01\xcf\xea\x41\x41\x40\xde\x5d\xae\x22\x23"
+ "\xb0\x03\x61\xa3\x96\x17\x7a\x9c\xb4\x10\xff\x61\xf2\x00\x15\xad", 32);
+ if (errtxt)
+ goto failed;
+
+ if (extended)
+ {
+ what = "long string";
+ errtxt = _gcry_hash_selftest_check_one
+ (GCRY_MD_SHA256, 0,
+ "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 56,
+ "\x24\x8d\x6a\x61\xd2\x06\x38\xb8\xe5\xc0\x26\x93\x0c\x3e\x60\x39"
+ "\xa3\x3c\xe4\x59\x64\xff\x21\x67\xf6\xec\xed\xd4\x19\xdb\x06\xc1",
+ 32);
+ if (errtxt)
+ goto failed;
+
+ what = "one million \"a\"";
+ errtxt = _gcry_hash_selftest_check_one
+ (GCRY_MD_SHA256, 1,
+ NULL, 0,
+ "\xcd\xc7\x6e\x5c\x99\x14\xfb\x92\x81\xa1\xc7\xe2\x84\xd7\x3e\x67"
+ "\xf1\x80\x9a\x48\xa4\x97\x20\x0e\x04\x6d\x39\xcc\xc7\x11\x2c\xd0",
+ 32);
+ if (errtxt)
+ goto failed;
+ }
+
+ return 0; /* Succeeded. */
+
+ failed:
+ if (report)
+ report ("digest", GCRY_MD_SHA256, what, errtxt);
+ return GPG_ERR_SELFTEST_FAILED;
+}
+
+
+/* Run a full self-test for ALGO and return 0 on success. */
+static gpg_err_code_t
+run_selftests (int algo, int extended, selftest_report_func_t report)
+{
+ gpg_err_code_t ec;
+
+ switch (algo)
+ {
+ case GCRY_MD_SHA224:
+ ec = selftests_sha224 (extended, report);
+ break;
+ case GCRY_MD_SHA256:
+ ec = selftests_sha256 (extended, report);
+ break;
+ default:
+ ec = GPG_ERR_DIGEST_ALGO;
+ break;
+
+ }
+ return ec;
+}
+
+
+
+
+static byte asn224[19] = /* Object ID is 2.16.840.1.101.3.4.2.4 */
+ { 0x30, 0x2D, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48,
+ 0x01, 0x65, 0x03, 0x04, 0x02, 0x04, 0x05, 0x00, 0x04,
+ 0x1C
+ };
+
+static gcry_md_oid_spec_t oid_spec_sha224[] =
+ {
+ /* From RFC3874, Section 4 */
+ { "2.16.840.1.101.3.4.2.4" },
+ { NULL },
+ };
+
+static byte asn256[19] = /* Object ID is 2.16.840.1.101.3.4.2.1 */
+ { 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
+ 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05,
+ 0x00, 0x04, 0x20 };
+
+static gcry_md_oid_spec_t oid_spec_sha256[] =
+ {
+ /* According to the OpenPGP draft rfc2440-bis06 */
+ { "2.16.840.1.101.3.4.2.1" },
+ /* PKCS#1 sha256WithRSAEncryption */
+ { "1.2.840.113549.1.1.11" },
+
+ { NULL },
+ };
+
+gcry_md_spec_t _gcry_digest_spec_sha224 =
+ {
+ "SHA224", asn224, DIM (asn224), oid_spec_sha224, 28,
+ sha224_init, sha256_write, sha256_final, sha256_read,
+ sizeof (SHA256_CONTEXT)
+ };
+md_extra_spec_t _gcry_digest_extraspec_sha224 =
+ {
+ run_selftests
+ };
+
+gcry_md_spec_t _gcry_digest_spec_sha256 =
+ {
+ "SHA256", asn256, DIM (asn256), oid_spec_sha256, 32,
+ sha256_init, sha256_write, sha256_final, sha256_read,
+ sizeof (SHA256_CONTEXT)
+ };
+md_extra_spec_t _gcry_digest_extraspec_sha256 =
+ {
+ run_selftests
+ };
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 11:27:28 +0000