From fa5c13ff4cd10d32131fe02dad77e03e603a83e7 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Fri, 31 Oct 2014 08:23:34 -0700
Subject: [PATCH] Add bench_sign tool

---
 Makefile.am      |  5 ++++-
 src/bench_sign.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 1 deletion(-)
 create mode 100644 src/bench_sign.c

diff --git a/Makefile.am b/Makefile.am
index aeb5de0..accf0b9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -48,10 +48,13 @@ libsecp256k1_la_LIBADD = libsecp256k1_common.la $(SECP_LIBS)
 
 noinst_PROGRAMS =
 if USE_BENCHMARK
-noinst_PROGRAMS += bench_verify bench_inv
+noinst_PROGRAMS += bench_verify bench_sign bench_inv
 bench_verify_SOURCES = src/bench_verify.c
 bench_verify_LDADD = libsecp256k1.la $(SECP_LIBS)
 bench_verify_LDFLAGS = -static
+bench_sign_SOURCES = src/bench_sign.c
+bench_sign_LDADD = libsecp256k1.la $(SECP_LIBS)
+bench_sign_LDFLAGS = -static
 bench_inv_SOURCES = src/bench_inv.c
 bench_inv_LDADD = libsecp256k1_common.la $(SECP_LIBS)
 bench_inv_LDFLAGS = -static
diff --git a/src/bench_sign.c b/src/bench_sign.c
new file mode 100644
index 0000000..3d8bfa1
--- /dev/null
+++ b/src/bench_sign.c
@@ -0,0 +1,48 @@
+// Copyright (c) 2014 Pieter Wuille
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <stdio.h>
+#include <string.h>
+
+#include "include/secp256k1.h"
+#include "util.h"
+
+int main() {
+    secp256k1_start(SECP256K1_START_SIGN);
+
+    unsigned char msg[32];
+    unsigned char nonce[32];
+    unsigned char key[32];
+
+    for (int i = 0; i < 32; i++) msg[i] = i + 1;
+    for (int i = 0; i < 32; i++) nonce[i] = i + 33;
+    for (int i = 0; i < 32; i++) key[i] = i + 65;
+
+    unsigned char sig[64];
+
+    for (int i=0; i<1000000; i++) {
+        int recid = 0;
+        CHECK(secp256k1_ecdsa_sign_compact(msg, 32, sig, key, nonce, &recid));
+        for (int j = 0; j < 32; j++) {
+            nonce[j] = key[j];     // Move former key to nonce
+            msg[j] = sig[j];       // Move former R to message.
+            key[j] = sig[j + 32];  // Move former S to key.
+        }
+    }
+
+    static const unsigned char fini[64] = {
+        0x92, 0x03, 0xef, 0xf1, 0x58, 0x0b, 0x49, 0x8d,
+        0x22, 0x3d, 0x49, 0x0e, 0xbf, 0x26, 0x50, 0x0e,
+        0x2d, 0x62, 0x90, 0xd7, 0x82, 0xbd, 0x3d, 0x5c,
+        0xa9, 0x10, 0xa5, 0x49, 0xb1, 0xd8, 0x8c, 0xc0,
+        0x5b, 0x5e, 0x9e, 0x68, 0x51, 0x3d, 0xe8, 0xec,
+        0x82, 0x30, 0x82, 0x88, 0x8c, 0xfd, 0xe7, 0x71,
+        0x15, 0x92, 0xfc, 0x14, 0x59, 0x78, 0x31, 0xb3,
+        0xf6, 0x07, 0x91, 0x18, 0x00, 0x8d, 0x4c, 0xb2
+    };
+    CHECK(memcmp(sig, fini, 64) == 0);
+
+    secp256k1_stop();
+    return 0;
+}