Add PBKDF2 HMAC functions

Author: ComputerCraftr

src/crypto/CMakeLists.txt

@@ -8,9 +8,12 @@ add_library(bitcoin_crypto STATIC EXCLUDE_FROM_ALL
   chacha20poly1305.cpp
   hex_base.cpp
   hkdf_sha256_32.cpp
+  hmac_ripemd160.cpp
+  hmac_sha1.cpp
   hmac_sha256.cpp
   hmac_sha512.cpp
   muhash.cpp
+  pbkdf2_hmac.cpp
   poly1305.cpp
   ripemd160.cpp
   sha1.cpp

src/crypto/hmac_ripemd160.cpp

@@ -0,0 +1,34 @@
+// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <crypto/hmac_ripemd160.h>
+
+#include <string.h>
+
+CHMAC_RIPEMD160::CHMAC_RIPEMD160(const unsigned char* key, size_t keylen)
+{
+    unsigned char rkey[64];
+    if (keylen <= 64) {
+        memcpy(rkey, key, keylen);
+        memset(rkey + keylen, 0, 64 - keylen);
+    } else {
+        CRIPEMD160().Write(key, keylen).Finalize(rkey);
+        memset(rkey + 20, 0, 20);
+    }
+
+    for (int n = 0; n < 64; n++)
+        rkey[n] ^= 0x5c;
+    outer.Write(rkey, 64);
+
+    for (int n = 0; n < 64; n++)
+        rkey[n] ^= 0x5c ^ 0x36;
+    inner.Write(rkey, 64);
+}
+
+void CHMAC_RIPEMD160::Finalize(unsigned char hash[OUTPUT_SIZE])
+{
+    unsigned char temp[20];
+    inner.Finalize(temp);
+    outer.Write(temp, 20).Finalize(hash);
+}

src/crypto/hmac_ripemd160.h

@@ -0,0 +1,32 @@
+// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_CRYPTO_HMAC_RIPEMD160_H
+#define BITCOIN_CRYPTO_HMAC_RIPEMD160_H
+
+#include <crypto/ripemd160.h>
+
+#include <stdint.h>
+#include <stdlib.h>
+
+/** A hasher class for HMAC-RIPEMD-160. */
+class CHMAC_RIPEMD160
+{
+private:
+    CRIPEMD160 outer;
+    CRIPEMD160 inner;
+
+public:
+    static const size_t OUTPUT_SIZE = 20;
+
+    CHMAC_RIPEMD160(const unsigned char* key, size_t keylen);
+    CHMAC_RIPEMD160& Write(const unsigned char* data, size_t len)
+    {
+        inner.Write(data, len);
+        return *this;
+    }
+    void Finalize(unsigned char hash[OUTPUT_SIZE]);
+};
+
+#endif // BITCOIN_CRYPTO_HMAC_RIPEMD160_H

src/crypto/hmac_sha1.cpp

@@ -0,0 +1,34 @@
+// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <crypto/hmac_sha1.h>
+
+#include <string.h>
+
+CHMAC_SHA1::CHMAC_SHA1(const unsigned char* key, size_t keylen)
+{
+    unsigned char rkey[64];
+    if (keylen <= 64) {
+        memcpy(rkey, key, keylen);
+        memset(rkey + keylen, 0, 64 - keylen);
+    } else {
+        CSHA1().Write(key, keylen).Finalize(rkey);
+        memset(rkey + 20, 0, 20);
+    }
+
+    for (int n = 0; n < 64; n++)
+        rkey[n] ^= 0x5c;
+    outer.Write(rkey, 64);
+
+    for (int n = 0; n < 64; n++)
+        rkey[n] ^= 0x5c ^ 0x36;
+    inner.Write(rkey, 64);
+}
+
+void CHMAC_SHA1::Finalize(unsigned char hash[OUTPUT_SIZE])
+{
+    unsigned char temp[20];
+    inner.Finalize(temp);
+    outer.Write(temp, 20).Finalize(hash);
+}

src/crypto/hmac_sha1.h

@@ -0,0 +1,32 @@
+// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_CRYPTO_HMAC_SHA1_H
+#define BITCOIN_CRYPTO_HMAC_SHA1_H
+
+#include <crypto/sha1.h>
+
+#include <stdint.h>
+#include <stdlib.h>
+
+/** A hasher class for HMAC-SHA-1. */
+class CHMAC_SHA1
+{
+private:
+    CSHA1 outer;
+    CSHA1 inner;
+
+public:
+    static const size_t OUTPUT_SIZE = 20;
+
+    CHMAC_SHA1(const unsigned char* key, size_t keylen);
+    CHMAC_SHA1& Write(const unsigned char* data, size_t len)
+    {
+        inner.Write(data, len);
+        return *this;
+    }
+    void Finalize(unsigned char hash[OUTPUT_SIZE]);
+};
+
+#endif // BITCOIN_CRYPTO_HMAC_SHA1_H