1 files changed, 355 insertions, 0 deletions
diff --git a/libotr/libgcrypt-1.8.7/cipher/gostr3411-94.c b/libotr/libgcrypt-1.8.7/cipher/gostr3411-94.c
new file mode 100644
index 0000000..a782427
--- /dev/null
+++ b/libotr/libgcrypt-1.8.7/cipher/gostr3411-94.c
@@ -0,0 +1,355 @@
+/* gostr3411-94.c - GOST R 34.11-94 hash function
+ * Copyright (C) 2012 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/>.
+ */
+
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "g10lib.h"
+#include "bithelp.h"
+#include "bufhelp.h"
+#include "cipher.h"
+#include "hash-common.h"
+
+#include "gost.h"
+
+#define max(a, b) (((a) > (b)) ? (a) : (b))
+
+typedef struct {
+  gcry_md_block_ctx_t bctx;
+  GOST28147_context hd;
+  union {
+    u32 h[8];
+    byte result[32];
+  };
+  u32 sigma[8];
+  u32 len;
+  int cryptopro;
+} GOSTR3411_CONTEXT;
+
+static unsigned int
+transform (void *c, const unsigned char *data, size_t nblks);
+
+static void
+gost3411_init (void *context, unsigned int flags)
+{
+  GOSTR3411_CONTEXT *hd = context;
+
+  (void)flags;
+
+  memset (&hd->hd, 0, sizeof(hd->hd));
+  memset (hd->h, 0, 32);
+  memset (hd->sigma, 0, 32);
+
+  hd->bctx.nblocks = 0;
+  hd->bctx.count = 0;
+  hd->bctx.blocksize = 32;
+  hd->bctx.bwrite = transform;
+  hd->cryptopro = 0;
+}
+
+static void
+gost3411_cp_init (void *context, unsigned int flags)
+{
+  GOSTR3411_CONTEXT *hd = context;
+  gost3411_init (context, flags);
+  hd->cryptopro = 1;
+}
+
+static void
+do_p (u32 *p, u32 *u, u32 *v)
+{
+  int k;
+  u32 t[8];
+
+  for (k = 0; k < 8; k++)
+    t[k] = u[k] ^ v[k];
+
+  for (k = 0; k < 4; k++)
+    {
+          p[k+0] = ((t[0] >> (8*k)) & 0xff) << 0 |
+                   ((t[2] >> (8*k)) & 0xff) << 8 |
+                   ((t[4] >> (8*k)) & 0xff) << 16 |
+                   ((t[6] >> (8*k)) & 0xff) << 24;
+          p[k+4] = ((t[1] >> (8*k)) & 0xff) << 0 |
+                   ((t[3] >> (8*k)) & 0xff) << 8 |
+                   ((t[5] >> (8*k)) & 0xff) << 16 |
+                   ((t[7] >> (8*k)) & 0xff) << 24;
+    }
+}
+
+static void
+do_a (u32 *u)
+{
+  u32 t[2];
+  int i;
+  memcpy(t, u, 2*4);
+  for (i = 0; i < 6; i++)
+    u[i] = u[i+2];
+  u[6] = u[0] ^ t[0];
+  u[7] = u[1] ^ t[1];
+}
+/* apply do_a twice: 1 2 3 4 -> 3 4 1^2 2^3 */
+static void
+do_a2 (u32 *u)
+{
+  u32 t[4];
+  int i;
+  memcpy (t, u, 16);
+  memcpy (u, u + 4, 16);
+  for (i = 0; i < 2; i++)
+    {
+      u[4+i] = t[i] ^ t[i + 2];
+      u[6+i] = u[i] ^ t[i + 2];
+    }
+}
+
+static void
+do_apply_c2 (u32 *u)
+{
+  u[ 0] ^= 0xff00ff00;
+  u[ 1] ^= 0xff00ff00;
+  u[ 2] ^= 0x00ff00ff;
+  u[ 3] ^= 0x00ff00ff;
+  u[ 4] ^= 0x00ffff00;
+  u[ 5] ^= 0xff0000ff;
+  u[ 6] ^= 0x000000ff;
+  u[ 7] ^= 0xff00ffff;
+}
+
+#define do_chi_step12(e) \
+  e[6] ^= ((e[6] >> 16) ^ e[7] ^ (e[7] >> 16) ^ e[4] ^ (e[5] >>16)) & 0xffff;
+
+#define do_chi_step13(e) \
+  e[6] ^= ((e[7] ^ (e[7] >> 16) ^ e[0] ^ (e[4] >> 16) ^ e[6]) & 0xffff) << 16;
+
+#define do_chi_doublestep(e, i) \
+  e[i] ^= (e[i] >> 16) ^ (e[(i+1)%8] << 16) ^ e[(i+1)%8] ^ (e[(i+1)%8] >> 16) ^ (e[(i+2)%8] << 16) ^ e[(i+6)%8] ^ (e[(i+7)%8] >> 16); \
+  e[i] ^= (e[i] << 16);
+
+static void
+do_chi_submix12 (u32 *e, u32 *x)
+{
+  e[6] ^= x[0];
+  e[7] ^= x[1];
+  e[0] ^= x[2];
+  e[1] ^= x[3];
+  e[2] ^= x[4];
+  e[3] ^= x[5];
+  e[4] ^= x[6];
+  e[5] ^= x[7];
+}
+
+static void
+do_chi_submix13 (u32 *e, u32 *x)
+{
+  e[6] ^= (x[0] << 16) | (x[7] >> 16);
+  e[7] ^= (x[1] << 16) | (x[0] >> 16);
+  e[0] ^= (x[2] << 16) | (x[1] >> 16);
+  e[1] ^= (x[3] << 16) | (x[2] >> 16);
+  e[2] ^= (x[4] << 16) | (x[3] >> 16);
+  e[3] ^= (x[5] << 16) | (x[4] >> 16);
+  e[4] ^= (x[6] << 16) | (x[5] >> 16);
+  e[5] ^= (x[7] << 16) | (x[6] >> 16);
+}
+
+static void
+do_add (u32 *s, u32 *a)
+{
+  u32 carry = 0;
+  int i;
+
+  for (i = 0; i < 8; i++)
+    {
+      u32 op = carry + a[i];
+      s[i] += op;
+      carry = (a[i] > op) || (op > s[i]);
+    }
+}
+
+static unsigned int
+do_hash_step (GOSTR3411_CONTEXT *hd, u32 *h, u32 *m)
+{
+  u32 u[8], v[8];
+  u32 s[8];
+  u32 k[8];
+  unsigned int burn;
+  int i;
+
+  memcpy (u, h, 32);
+  memcpy (v, m, 32);
+
+  for (i = 0; i < 4; i++) {
+    do_p (k, u, v);
+
+    burn = _gcry_gost_enc_data (&hd->hd, k, &s[2*i], &s[2*i+1], h[2*i], h[2*i+1], hd->cryptopro);
+
+    do_a (u);
+    if (i == 1)
+      do_apply_c2 (u);
+    do_a2 (v);
+  }
+
+  for (i = 0; i < 5; i++)
+    {
+      do_chi_doublestep (s, 0);
+      do_chi_doublestep (s, 1);
+      do_chi_doublestep (s, 2);
+      do_chi_doublestep (s, 3);
+      do_chi_doublestep (s, 4);
+      /* That is in total 12 + 1 + 61 = 74 = 16 * 4 + 10 rounds */
+      if (i == 4)
+        break;
+      do_chi_doublestep (s, 5);
+      if (i == 0)
+        do_chi_submix12(s, m);
+      do_chi_step12 (s);
+      if (i == 0)
+        do_chi_submix13(s, h);
+      do_chi_step13 (s);
+      do_chi_doublestep (s, 7);
+    }
+
+  memcpy (h, s+5, 12);
+  memcpy (h+3, s, 20);
+
+  return /* burn_stack */ 4 * sizeof(void*) /* func call (ret addr + args) */ +
+                          4 * 32 + 2 * sizeof(int) /* stack */ +
+                          max(burn /* _gcry_gost_enc_one */,
+                              sizeof(void*) * 2 /* do_a2 call */ +
+                              16 + sizeof(int) /* do_a2 stack */ );
+}
+
+static unsigned int
+transform_blk (void *ctx, const unsigned char *data)
+{
+  GOSTR3411_CONTEXT *hd = ctx;
+  u32 m[8];
+  unsigned int burn;
+  int i;
+
+  for (i = 0; i < 8; i++)
+    m[i] = buf_get_le32(data + i*4);
+  burn = do_hash_step (hd, hd->h, m);
+  do_add (hd->sigma, m);
+
+  return /* burn_stack */ burn + 3 * sizeof(void*) + 32 + 2 * sizeof(void*);
+}
+
+
+static unsigned int
+transform ( void *c, const unsigned char *data, size_t nblks )
+{
+  unsigned int burn;
+
+  do
+    {
+      burn = transform_blk (c, data);
+      data += 32;
+    }
+  while (--nblks);
+
+  return burn;
+}
+
+
+/*
+   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
+gost3411_final (void *context)
+{
+  GOSTR3411_CONTEXT *hd = context;
+  size_t padlen = 0;
+  u32 l[8];
+  int i;
+  MD_NBLOCKS_TYPE nblocks;
+
+  if (hd->bctx.count > 0)
+    {
+      padlen = 32 - hd->bctx.count;
+      memset (hd->bctx.buf + hd->bctx.count, 0, padlen);
+      hd->bctx.count += padlen;
+      _gcry_md_block_write (hd, NULL, 0); /* flush */;
+    }
+
+  if (hd->bctx.count != 0)
+    return; /* Something went wrong */
+
+  memset (l, 0, 32);
+
+  nblocks = hd->bctx.nblocks;
+  if (padlen)
+    {
+      nblocks --;
+      l[0] = 256 - padlen * 8;
+    }
+  l[0] |= nblocks << 8;
+  nblocks >>= 24;
+
+  for (i = 1; i < 8 && nblocks != 0; i++)
+    {
+      l[i] = nblocks;
+      nblocks >>= 24;
+    }
+
+  do_hash_step (hd, hd->h, l);
+  do_hash_step (hd, hd->h, hd->sigma);
+  for (i = 0; i < 8; i++)
+    hd->h[i] = le_bswap32(hd->h[i]);
+}
+
+static byte *
+gost3411_read (void *context)
+{
+  GOSTR3411_CONTEXT *hd = context;
+
+  return hd->result;
+}
+
+static unsigned char asn[6] = /* Object ID is 1.2.643.2.2.3 */
+  { 0x2a, 0x85, 0x03, 0x02, 0x02, 0x03 };
+
+static gcry_md_oid_spec_t oid_spec_gostr3411[] =
+  {
+    /* iso.member-body.ru.rans.cryptopro.3 (gostR3411-94-with-gostR3410-2001) */
+    { "1.2.643.2.2.3" },
+    /* iso.member-body.ru.rans.cryptopro.9 (gostR3411-94) */
+    { "1.2.643.2.2.9" },
+    {NULL},
+  };
+
+gcry_md_spec_t _gcry_digest_spec_gost3411_94 =
+  {
+    GCRY_MD_GOSTR3411_94, {0, 0},
+    "GOSTR3411_94", NULL, 0, NULL, 32,
+    gost3411_init, _gcry_md_block_write, gost3411_final, gost3411_read, NULL,
+    sizeof (GOSTR3411_CONTEXT)
+  };
+gcry_md_spec_t _gcry_digest_spec_gost3411_cp =
+  {
+    GCRY_MD_GOSTR3411_CP, {0, 0},
+    "GOSTR3411_CP", asn, DIM (asn), oid_spec_gostr3411, 32,
+    gost3411_cp_init, _gcry_md_block_write, gost3411_final, gost3411_read, NULL,
+    sizeof (GOSTR3411_CONTEXT)
+  };