Move crypto files out of base, to a top level directory.

src/crypto is now an independent project that contains our
cryptographic primitives (except md5 and sha1).

This removes the base dependency from nss, openssl and sqlite.

BUG=76996
TEST=none
Review URL: http://codereview.chromium.org/6805019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@81611 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 33 insertions, 0 deletions

diff --git a/crypto/sha2.h b/crypto/sha2.h
new file mode 100644
index 0000000..349a606
--- /dev/null
+++ b/crypto/sha2.h
@@ -0,0 +1,33 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CRYPTO_SHA2_H_
+#define CRYPTO_SHA2_H_
+#pragma once
+
+#include <string>
+
+namespace crypto {
+
+// These functions perform SHA-256 operations.
+//
+// Functions for SHA-384 and SHA-512 can be added when the need arises.
+
+enum {
+  SHA256_LENGTH = 32  // length in bytes of a SHA-256 hash
+};
+
+// Computes the SHA-256 hash of the input string 'str' and stores the first
+// 'len' bytes of the hash in the output buffer 'output'.  If 'len' > 32,
+// only 32 bytes (the full hash) are stored in the 'output' buffer.
+void SHA256HashString(const std::string& str,
+                      void* output, size_t len);
+
+// Convenience version of the above that returns the result in a 32-byte
+// string.
+std::string SHA256HashString(const std::string& str);
+
+}  // namespace crypto
+
+#endif  // CRYPTO_SHA2_H_