1 files changed, 68 insertions, 0 deletions
diff --git a/src/tcs/crypto/openssl/crypto.c b/src/tcs/crypto/openssl/crypto.c
new file mode 100644
index 0000000..c02db27
--- /dev/null
+++ b/src/tcs/crypto/openssl/crypto.c
@@ -0,0 +1,68 @@
+
+/*
+ * Licensed Materials - Property of IBM
+ *
+ * trousers - An open source TCG Software Stack
+ *
+ * (C) Copyright International Business Machines Corp. 2006
+ *
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <openssl/evp.h>
+
+#include "trousers/tss.h"
+#include "trousers_types.h"
+#include "tcs_tsp.h"
+#include "tcslog.h"
+
+/*
+ * Hopefully this will make the code clearer since
+ * OpenSSL returns 1 on success
+ */
+#define EVP_SUCCESS 1
+
+TSS_RESULT
+Hash(UINT32 HashType, UINT32 BufSize, BYTE* Buf, BYTE* Digest)
+{
+	EVP_MD_CTX md_ctx;
+	unsigned int result_size;
+	int rv;
+
+	switch (HashType) {
+		case TSS_HASH_SHA1:
+			rv = EVP_DigestInit(&md_ctx, EVP_sha1());
+			break;
+		default:
+			rv = TCSERR(TSS_E_BAD_PARAMETER);
+			goto out;
+			break;
+	}
+
+	if (rv != EVP_SUCCESS) {
+		rv = TCSERR(TSS_E_INTERNAL_ERROR);
+		goto out;
+	}
+
+	rv = EVP_DigestUpdate(&md_ctx, Buf, BufSize);
+	if (rv != EVP_SUCCESS) {
+		rv = TCSERR(TSS_E_INTERNAL_ERROR);
+		goto out;
+	}
+
+	result_size = EVP_MD_CTX_size(&md_ctx);
+	rv = EVP_DigestFinal(&md_ctx, Digest, &result_size);
+	if (rv != EVP_SUCCESS) {
+		rv = TCSERR(TSS_E_INTERNAL_ERROR);
+	} else
+		rv = TSS_SUCCESS;
+
+out:
+	return rv;
+}