Use libsecp256k1's RFC6979 implementation

1 files changed, 0 insertions, 47 deletions

diff --git a/src/crypto/rfc6979_hmac_sha256.cpp b/src/crypto/rfc6979_hmac_sha256.cpp
deleted file mode 100644
index a8c971c3ba..0000000000
--- a/src/crypto/rfc6979_hmac_sha256.cpp
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright (c) 2014 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/rfc6979_hmac_sha256.h"
-
-#include <string.h>
-
-#include <algorithm>
-
-static const unsigned char zero[1] = {0x00};
-static const unsigned char one[1] = {0x01};
-
-RFC6979_HMAC_SHA256::RFC6979_HMAC_SHA256(const unsigned char* key, size_t keylen, const unsigned char* msg, size_t msglen) : retry(false)
-{
-    memset(V, 0x01, sizeof(V));
-    memset(K, 0x00, sizeof(K));
-
-    CHMAC_SHA256(K, sizeof(K)).Write(V, sizeof(V)).Write(zero, sizeof(zero)).Write(key, keylen).Write(msg, msglen).Finalize(K);
-    CHMAC_SHA256(K, sizeof(K)).Write(V, sizeof(V)).Finalize(V);
-    CHMAC_SHA256(K, sizeof(K)).Write(V, sizeof(V)).Write(one, sizeof(one)).Write(key, keylen).Write(msg, msglen).Finalize(K);
-    CHMAC_SHA256(K, sizeof(K)).Write(V, sizeof(V)).Finalize(V);
-}
-
-RFC6979_HMAC_SHA256::~RFC6979_HMAC_SHA256()
-{
-    memset(V, 0x01, sizeof(V));
-    memset(K, 0x00, sizeof(K));
-}
-
-void RFC6979_HMAC_SHA256::Generate(unsigned char* output, size_t outputlen)
-{
-    if (retry) {
-        CHMAC_SHA256(K, sizeof(K)).Write(V, sizeof(V)).Write(zero, sizeof(zero)).Finalize(K);
-        CHMAC_SHA256(K, sizeof(K)).Write(V, sizeof(V)).Finalize(V);
-    }
-
-    while (outputlen > 0) {
-        CHMAC_SHA256(K, sizeof(K)).Write(V, sizeof(V)).Finalize(V);
-        size_t len = std::min(outputlen, sizeof(V));
-        memcpy(output, V, len);
-        output += len;
-        outputlen -= len;
-    }
-
-    retry = true;
-}