1 files changed, 272 insertions, 0 deletions
diff --git a/plugins/MirOTR/Libgcrypt/cipher/mac-hmac.c b/plugins/MirOTR/Libgcrypt/cipher/mac-hmac.c
new file mode 100644
index 0000000000..15c613d53a
--- /dev/null
+++ b/plugins/MirOTR/Libgcrypt/cipher/mac-hmac.c
@@ -0,0 +1,272 @@
+/* mac-hmac.c  -  HMAC glue for MAC API
+ * Copyright © 2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
+ *
+ * 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 <errno.h>
+
+#include "g10lib.h"
+#include "./mac-internal.h"
+#include "bufhelp.h"
+
+
+static int
+map_mac_algo_to_md (int mac_algo)
+{
+  switch (mac_algo)
+    {
+    default:
+      return GCRY_MD_NONE;
+    case GCRY_MAC_HMAC_MD4:
+      return GCRY_MD_MD4;
+    case GCRY_MAC_HMAC_MD5:
+      return GCRY_MD_MD5;
+    case GCRY_MAC_HMAC_SHA1:
+      return GCRY_MD_SHA1;
+    case GCRY_MAC_HMAC_SHA224:
+      return GCRY_MD_SHA224;
+    case GCRY_MAC_HMAC_SHA256:
+      return GCRY_MD_SHA256;
+    case GCRY_MAC_HMAC_SHA384:
+      return GCRY_MD_SHA384;
+    case GCRY_MAC_HMAC_SHA512:
+      return GCRY_MD_SHA512;
+    case GCRY_MAC_HMAC_RMD160:
+      return GCRY_MD_RMD160;
+    case GCRY_MAC_HMAC_TIGER1:
+      return GCRY_MD_TIGER1;
+    case GCRY_MAC_HMAC_WHIRLPOOL:
+      return GCRY_MD_WHIRLPOOL;
+    case GCRY_MAC_HMAC_GOSTR3411_94:
+      return GCRY_MD_GOSTR3411_94;
+    case GCRY_MAC_HMAC_STRIBOG256:
+      return GCRY_MD_STRIBOG256;
+    case GCRY_MAC_HMAC_STRIBOG512:
+      return GCRY_MD_STRIBOG512;
+    }
+}
+
+
+static gcry_err_code_t
+hmac_open (gcry_mac_hd_t h)
+{
+  gcry_err_code_t err;
+  gcry_md_hd_t hd;
+  int secure = (h->magic == CTX_MAGIC_SECURE);
+  unsigned int flags;
+  int md_algo;
+
+  md_algo = map_mac_algo_to_md (h->spec->algo);
+
+  flags = GCRY_MD_FLAG_HMAC;
+  flags |= (secure ? GCRY_MD_FLAG_SECURE : 0);
+
+  err = _gcry_md_open (&hd, md_algo, flags);
+  if (err)
+    return err;
+
+  h->u.hmac.md_algo = md_algo;
+  h->u.hmac.md_ctx = hd;
+  return 0;
+}
+
+
+static void
+hmac_close (gcry_mac_hd_t h)
+{
+  _gcry_md_close (h->u.hmac.md_ctx);
+  h->u.hmac.md_ctx = NULL;
+}
+
+
+static gcry_err_code_t
+hmac_setkey (gcry_mac_hd_t h, const unsigned char *key, size_t keylen)
+{
+  return _gcry_md_setkey (h->u.hmac.md_ctx, key, keylen);
+}
+
+
+static gcry_err_code_t
+hmac_reset (gcry_mac_hd_t h)
+{
+  _gcry_md_reset (h->u.hmac.md_ctx);
+  return 0;
+}
+
+
+static gcry_err_code_t
+hmac_write (gcry_mac_hd_t h, const unsigned char *buf, size_t buflen)
+{
+  _gcry_md_write (h->u.hmac.md_ctx, buf, buflen);
+  return 0;
+}
+
+
+static gcry_err_code_t
+hmac_read (gcry_mac_hd_t h, unsigned char *outbuf, size_t * outlen)
+{
+  unsigned int dlen;
+  const unsigned char *digest;
+
+  dlen = _gcry_md_get_algo_dlen (h->u.hmac.md_algo);
+  digest = _gcry_md_read (h->u.hmac.md_ctx, h->u.hmac.md_algo);
+
+  if (*outlen <= dlen)
+    buf_cpy (outbuf, digest, *outlen);
+  else
+    {
+      buf_cpy (outbuf, digest, dlen);
+      *outlen = dlen;
+    }
+
+  return 0;
+}
+
+
+static gcry_err_code_t
+hmac_verify (gcry_mac_hd_t h, const unsigned char *buf, size_t buflen)
+{
+  unsigned int dlen;
+  const unsigned char *digest;
+
+  dlen = _gcry_md_get_algo_dlen (h->u.hmac.md_algo);
+  digest = _gcry_md_read (h->u.hmac.md_ctx, h->u.hmac.md_algo);
+
+  if (buflen > dlen)
+    return GPG_ERR_INV_LENGTH;
+
+  return buf_eq_const (buf, digest, buflen) ? 0 : GPG_ERR_CHECKSUM;
+}
+
+
+static unsigned int
+hmac_get_maclen (int algo)
+{
+  return _gcry_md_get_algo_dlen (map_mac_algo_to_md (algo));
+}
+
+
+static unsigned int
+hmac_get_keylen (int algo)
+{
+  /* Return blocksize for default key length. */
+  switch (algo)
+    {
+    case GCRY_MAC_HMAC_SHA384:
+    case GCRY_MAC_HMAC_SHA512:
+      return 128;
+    case GCRY_MAC_HMAC_GOSTR3411_94:
+      return 32;
+    default:
+      return 64;
+    }
+}
+
+
+static const gcry_mac_spec_ops_t hmac_ops = {
+  hmac_open,
+  hmac_close,
+  hmac_setkey,
+  NULL,
+  hmac_reset,
+  hmac_write,
+  hmac_read,
+  hmac_verify,
+  hmac_get_maclen,
+  hmac_get_keylen
+};
+
+
+#if USE_SHA1
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_sha1 = {
+  GCRY_MAC_HMAC_SHA1, {0, 1}, "HMAC_SHA1",
+  &hmac_ops
+};
+#endif
+#if USE_SHA256
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_sha256 = {
+  GCRY_MAC_HMAC_SHA256, {0, 1}, "HMAC_SHA256",
+  &hmac_ops
+};
+
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_sha224 = {
+  GCRY_MAC_HMAC_SHA224, {0, 1}, "HMAC_SHA224",
+  &hmac_ops
+};
+#endif
+#if USE_SHA512
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_sha512 = {
+  GCRY_MAC_HMAC_SHA512, {0, 1}, "HMAC_SHA512",
+  &hmac_ops
+};
+
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_sha384 = {
+  GCRY_MAC_HMAC_SHA384, {0, 1}, "HMAC_SHA384",
+  &hmac_ops
+};
+#endif
+#ifdef USE_GOST_R_3411_94
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_gost3411_94 = {
+  GCRY_MAC_HMAC_GOSTR3411_94, {0, 0}, "HMAC_GOSTR3411_94",
+  &hmac_ops
+};
+#endif
+#ifdef USE_GOST_R_3411_12
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_stribog256 = {
+  GCRY_MAC_HMAC_STRIBOG256, {0, 0}, "HMAC_STRIBOG256",
+  &hmac_ops
+};
+
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_stribog512 = {
+  GCRY_MAC_HMAC_STRIBOG512, {0, 0}, "HMAC_STRIBOG512",
+  &hmac_ops
+};
+#endif
+#if USE_WHIRLPOOL
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_whirlpool = {
+  GCRY_MAC_HMAC_WHIRLPOOL, {0, 0}, "HMAC_WHIRLPOOL",
+  &hmac_ops
+};
+#endif
+#if USE_RMD160
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_rmd160 = {
+  GCRY_MAC_HMAC_RMD160, {0, 0}, "HMAC_RIPEMD160",
+  &hmac_ops
+};
+#endif
+#if USE_TIGER
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_tiger1 = {
+  GCRY_MAC_HMAC_TIGER1, {0, 0}, "HMAC_TIGER",
+  &hmac_ops
+};
+#endif
+#if USE_MD5
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_md5 = {
+  GCRY_MAC_HMAC_MD5, {0, 0}, "HMAC_MD5",
+  &hmac_ops
+};
+#endif
+#if USE_MD4
+gcry_mac_spec_t _gcry_mac_type_spec_hmac_md4 = {
+  GCRY_MAC_HMAC_MD4, {0, 0}, "HMAC_MD4",
+  &hmac_ops
+};
+#endif