43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
// Copyright (c) 2014 Pieter Wuille
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <stdio.h>
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#include <string.h>
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#include "include/secp256k1.h"
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#include "util.h"
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int main() {
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secp256k1_start(SECP256K1_START_VERIFY);
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unsigned char msg[32];
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unsigned char sig[64];
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for (int i = 0; i < 32; i++) msg[i] = 1 + i;
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for (int i = 0; i < 64; i++) sig[i] = 65 + i;
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unsigned char pubkey[33];
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for (int i=0; i<1000000; i++) {
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int pubkeylen = 33;
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CHECK(secp256k1_ecdsa_recover_compact(msg, 32, sig, pubkey, &pubkeylen, 1, i % 2));
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for (int j = 0; j < 32; j++) {
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sig[j + 32] = msg[j]; // Move former message to S.
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msg[j] = sig[j]; // Move former R to message.
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sig[j] = pubkey[j + 1]; // Move recovered pubkey X coordinate to R (which must be a valid X coordinate).
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}
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}
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static const unsigned char fini[33] = {
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0x02,
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0x52, 0x63, 0xae, 0x9a, 0x9d, 0x47, 0x1f, 0x1a,
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0xb2, 0x36, 0x65, 0x89, 0x11, 0xe7, 0xcc, 0x86,
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0xa3, 0xab, 0x97, 0xb6, 0xf1, 0xaf, 0xfd, 0x8f,
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0x9b, 0x38, 0xb6, 0x18, 0x55, 0xe5, 0xc2, 0x43
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};
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CHECK(memcmp(fini, pubkey, 33) == 0);
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secp256k1_stop();
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return 0;
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}
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