Initial commit

[openssl-gost/engine.git] / gost_md.c

diff --git a/gost_md.c b/gost_md.c
new file mode 100644 (file)
index 0000000..1ccc6be
--- /dev/null
+++ b/gost_md.c
@@ -0,0 +1,76 @@
+/**********************************************************************
+ *                          md_gost.c                                 *
+ *             Copyright (c) 2005-2006 Cryptocom LTD                  *
+ *         This file is distributed under the same license as OpenSSL *
+ *                                                                    *
+ *       OpenSSL interface to GOST R 34.11-94 hash functions          *
+ *          Requires OpenSSL 0.9.9 for compilation                    *
+ **********************************************************************/
+#include <string.h>
+#include "gost_lcl.h"
+#include "gosthash.h"
+#include "e_gost_err.h"
+
+/* implementation of GOST 34.11 hash function See gost_md.c*/
+static int gost_digest_init(EVP_MD_CTX *ctx);
+static int gost_digest_update(EVP_MD_CTX *ctx, const void *data,
+                              size_t count);
+static int gost_digest_final(EVP_MD_CTX *ctx, unsigned char *md);
+static int gost_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
+static int gost_digest_cleanup(EVP_MD_CTX *ctx);
+
+EVP_MD digest_gost = {
+    NID_id_GostR3411_94,
+    NID_undef,
+    32,
+    EVP_MD_FLAG_PKEY_METHOD_SIGNATURE,
+    gost_digest_init,
+    gost_digest_update,
+    gost_digest_final,
+    gost_digest_copy,
+    gost_digest_cleanup,
+    NULL,
+    NULL,
+    {NID_undef, NID_undef, 0, 0, 0},
+    32,
+    sizeof(struct ossl_gost_digest_ctx),
+    NULL
+};
+
+int gost_digest_init(EVP_MD_CTX *ctx)
+{
+    struct ossl_gost_digest_ctx *c = ctx->md_data;
+    memset(&(c->dctx), 0, sizeof(gost_hash_ctx));
+    gost_init(&(c->cctx), &GostR3411_94_CryptoProParamSet);
+    c->dctx.cipher_ctx = &(c->cctx);
+    return 1;
+}
+
+int gost_digest_update(EVP_MD_CTX *ctx, const void *data, size_t count)
+{
+    return hash_block((gost_hash_ctx *) ctx->md_data, data, count);
+}
+
+int gost_digest_final(EVP_MD_CTX *ctx, unsigned char *md)
+{
+    return finish_hash((gost_hash_ctx *) ctx->md_data, md);
+
+}
+
+int gost_digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
+{
+    struct ossl_gost_digest_ctx *md_ctx = to->md_data;
+    if (to->md_data && from->md_data) {
+        memcpy(to->md_data, from->md_data,
+               sizeof(struct ossl_gost_digest_ctx));
+        md_ctx->dctx.cipher_ctx = &(md_ctx->cctx);
+    }
+    return 1;
+}
+
+int gost_digest_cleanup(EVP_MD_CTX *ctx)
+{
+    if (ctx->md_data)
+        memset(ctx->md_data, 0, sizeof(struct ossl_gost_digest_ctx));
+    return 1;
+}