first commit, SM2-DSA only

engines/ccgost/gosthash.h

@@ -0,0 +1,48 @@
+/**********************************************************************
+ *                          gosthash.h                                *
+ *             Copyright (c) 2005-2006 Cryptocom LTD                  *
+ *       This file is distributed under the same license as OpenSSL   *
+ *                                                                    *
+ *    Declaration of GOST R 34.11-94 hash functions                   *
+ *       uses  and gost89.h Doesn't need OpenSSL                      *
+ **********************************************************************/
+#ifndef GOSTHASH_H
+#define GOSTHASH_H
+#include "gost89.h"
+#include <stdlib.h>
+
+#if (defined(_WIN32) || defined(_WIN64)) && !defined(__MINGW32__)
+typedef __int64 ghosthash_len;
+#elif defined(__arch64__)
+typedef long ghosthash_len;
+#else
+typedef long long ghosthash_len;
+#endif
+
+typedef struct gost_hash_ctx {
+		ghosthash_len len;
+		gost_ctx *cipher_ctx;
+		int left;
+		byte H[32];
+		byte S[32];
+		byte remainder[32];
+} gost_hash_ctx;		
+
+
+/* Initalizes gost hash ctx, including creation of gost cipher ctx */
+
+int init_gost_hash_ctx(gost_hash_ctx *ctx, const gost_subst_block *subst_block);
+void done_gost_hash_ctx(gost_hash_ctx *ctx);
+
+/* Cleans up all fields, except cipher ctx preparing ctx for computing
+ * of new hash value */
+int start_hash(gost_hash_ctx *ctx);
+
+/* Hashes block of data */
+int hash_block(gost_hash_ctx *ctx, const byte *block, size_t length);
+
+/* Finalizes computation of hash  and fills buffer (which should be at
+ * least 32 bytes long) with value of computed hash. */
+int finish_hash(gost_hash_ctx *ctx, byte *hashval);
+
+#endif