1 files changed, 56 insertions, 0 deletions
diff --git a/src/vendorcode/eltan/security/lib/cb_sha.c b/src/vendorcode/eltan/security/lib/cb_sha.c
new file mode 100644
index 000000000000..47cd10a47ca7
--- /dev/null
+++ b/src/vendorcode/eltan/security/lib/cb_sha.c
@@ -0,0 +1,56 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2019 Eltan B.V.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#include <cb_sha.h>
+
+int cb_sha_endian(enum vb2_hash_algorithm hash_alg, const uint8_t *data, uint32_t len,
+		  uint8_t *digest, enum endian_algorithm endian)
+{
+	int i;
+	int rv;
+	uint32_t digest_size;
+	uint8_t *result_ptr;
+	uint8_t result[VB2_MAX_DIGEST_SIZE];
+
+	switch (hash_alg) {
+	case VB2_HASH_SHA1:
+	        digest_size = VB2_SHA1_DIGEST_SIZE;
+		break;
+	case VB2_HASH_SHA256:
+	        digest_size = VB2_SHA256_DIGEST_SIZE;
+		break;
+	case VB2_HASH_SHA512:
+	        digest_size = VB2_SHA512_DIGEST_SIZE;
+		break;
+	default:
+		return VB2_ERROR_SHA_INIT_ALGORITHM;
+	}
+
+	result_ptr = result;
+	rv = vb2_digest_buffer(data, len, hash_alg, result_ptr, digest_size);
+	if (rv || (endian == NO_ENDIAN_ALGORITHM))
+		return rv;
+
+	for (i = 0; i < digest_size; ++i) {
+		if (endian == BIG_ENDIAN_ALGORITHM) {
+			/* use big endian */
+			digest[i] = *result_ptr++;
+		} else {
+			/* use little endian */
+			digest[digest_size - i - 1] = *result_ptr++;
+		}
+	}
+	return rv;
+}