1 files changed, 89 insertions, 0 deletions
diff --git a/src/libzrtpcpp/crypto/gcrypt/gcryptsha256.cpp b/src/libzrtpcpp/crypto/gcrypt/gcryptsha256.cpp
new file mode 100644
index 0000000..0c32bd8
--- /dev/null
+++ b/src/libzrtpcpp/crypto/gcrypt/gcryptsha256.cpp
@@ -0,0 +1,89 @@
+/*
+  Copyright (C) 2006-2007 Werner Dittmann
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program 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 General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @author Erik Eliasson <eliasson@it.kth.se>
+ *          Johan Bilien <jobi@via.ecp.fr>
+ *	    Werner Dittmann <Werner.Dittmann@t-online.de>
+ */
+
+#include <gcrypt.h>
+#include <libzrtpcpp/crypto/sha256.h>
+
+void sha256(unsigned char* data, unsigned int dataLength,
+            unsigned char* mac)
+{
+    gcry_md_hash_buffer(GCRY_MD_SHA256, mac, data, dataLength);
+}
+
+void sha256(unsigned char* dataChunks[],
+            unsigned int dataChunkLength[],
+            unsigned char* mac)
+{
+    gcry_md_hd_t hd;
+    gcry_error_t err = 0;
+
+    err = gcry_md_open(&hd, GCRY_MD_SHA256, 0);
+    while (*dataChunks) {
+        gcry_md_write (hd, *dataChunks, (uint32_t)(*dataChunkLength));
+        dataChunks++;
+        dataChunkLength++;
+    }
+    uint8_t* p = gcry_md_read (hd, GCRY_MD_SHA256);
+    memcpy(mac, p, SHA256_DIGEST_LENGTH);
+    gcry_md_close (hd);
+}
+
+void* createSha256Context()
+{
+    gcry_error_t err = 0;
+    gcry_md_hd_t hd;
+
+    err = gcry_md_open(&hd, GCRY_MD_SHA256, 0);
+    return (void*)hd;
+}
+
+void closeSha256Context(void* ctx, unsigned char* digest)
+{
+    gcry_md_hd_t hd = (gcry_md_hd_t)ctx;
+
+    if (digest != NULL) {
+        uint8_t* p = gcry_md_read (hd, GCRY_MD_SHA256);
+        memcpy(digest, p, SHA256_DIGEST_LENGTH);
+    }
+    gcry_md_close (hd);
+}
+
+void sha256Ctx(void* ctx, unsigned char* data, 
+               unsigned int dataLength)
+{
+    gcry_md_hd_t hd = (gcry_md_hd_t)ctx;
+
+    gcry_md_write (hd, data, dataLength);
+}
+
+void sha256Ctx(void* ctx, unsigned char* dataChunks[],
+               unsigned int dataChunkLength[])
+{
+    gcry_md_hd_t hd = (gcry_md_hd_t)ctx;
+
+    while (*dataChunks) {
+        gcry_md_write (hd, *dataChunks, (uint32_t)(*dataChunkLength));
+        dataChunks++;
+        dataChunkLength++;
+    }
+}