1 files changed, 65 insertions, 0 deletions
diff --git a/board/cr50/dcrypto/sha1.c b/board/cr50/dcrypto/sha1.c
new file mode 100644
index 0000000000..07ef3a34ef
--- /dev/null
+++ b/board/cr50/dcrypto/sha1.c
@@ -0,0 +1,65 @@
+/* Copyright 2015 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "dcrypto.h"
+#include "internal.h"
+#include "registers.h"
+
+#include "cryptoc/sha.h"
+
+static void dcrypto_sha1_init(SHA_CTX *ctx);
+static const uint8_t *dcrypto_sha1_final(SHA_CTX *unused);
+
+/*
+ * Hardware SHA implementation.
+ */
+static const HASH_VTAB HW_SHA1_VTAB = {
+	dcrypto_sha1_init,
+	dcrypto_sha_update,
+	dcrypto_sha1_final,
+	DCRYPTO_SHA1_hash,
+	SHA_DIGEST_SIZE
+};
+
+/* Requires dcrypto_grab_sha_hw() to be called first. */
+static void dcrypto_sha1_init(SHA_CTX *ctx)
+{
+	ctx->f = &HW_SHA1_VTAB;
+	dcrypto_sha_init(SHA1_MODE);
+}
+
+/* Select and initialize either the software or hardware
+ * implementation.  If "multi-threaded" behaviour is required, then
+ * callers must set sw_required to 1.  This is because SHA1 state
+ * internal to the hardware cannot be extracted, so it is not possible
+ * to suspend and resume a hardware based SHA operation.
+ *
+ * If the caller has no preference as to implementation, then hardware
+ * is preferred based on availability.  Hardware is considered to be
+ * in use between init() and finished() calls. */
+void DCRYPTO_SHA1_init(SHA_CTX *ctx, uint32_t sw_required)
+{
+	if (!sw_required && dcrypto_grab_sha_hw())
+		dcrypto_sha1_init(ctx);
+	else
+		SHA_init(ctx);
+}
+
+static const uint8_t *dcrypto_sha1_final(SHA_CTX *ctx)
+{
+	dcrypto_sha_wait(SHA1_MODE, (uint32_t *) ctx->buf);
+	return ctx->buf;
+}
+
+const uint8_t *DCRYPTO_SHA1_hash(const void *data, uint32_t n,
+				uint8_t *digest)
+{
+	if (dcrypto_grab_sha_hw())
+		/* dcrypto_sha_wait() will release the hw. */
+		dcrypto_sha_hash(SHA1_MODE, data, n, digest);
+	else
+		SHA_hash(data, n, digest);
+	return digest;
+}