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-rw-r--r--src/crypto/hmac_sha256.h32
1 files changed, 32 insertions, 0 deletions
diff --git a/src/crypto/hmac_sha256.h b/src/crypto/hmac_sha256.h
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+++ b/src/crypto/hmac_sha256.h
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+// Copyright (c) 2014 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_HMAC_SHA256_H
+#define BITCOIN_HMAC_SHA256_H
+
+#include "crypto/sha256.h"
+
+#include <stdint.h>
+#include <stdlib.h>
+
+/** A hasher class for HMAC-SHA-512. */
+class CHMAC_SHA256
+{
+private:
+ CSHA256 outer;
+ CSHA256 inner;
+
+public:
+ static const size_t OUTPUT_SIZE = 32;
+
+ CHMAC_SHA256(const unsigned char* key, size_t keylen);
+ CHMAC_SHA256& Write(const unsigned char* data, size_t len)
+ {
+ inner.Write(data, len);
+ return *this;
+ }
+ void Finalize(unsigned char hash[OUTPUT_SIZE]);
+};
+
+#endif // BITCOIN_SHA256_H