highperfocused/bitcoin
1
0
Fork 0
mirror of https://github.com/bitcoin/bitcoin.git synced 2026-04-27 15:28:49 +02:00
Code Issues Packages Projects Releases Wiki Activity

Add contrib/lax_der_parsing.h

Browse Source 
This shows a snippet of code to do lax DER parsing, without obeying to any
particular standard.
This commit is contained in:
Pieter Wuille
2015-10-14 17:43:20 +02:00
parent 3bb9c44719
commit fea19e7bb7
4 changed files with 222 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/ecdsa_impl.h
View File

@@ -1,5 +1,5 @@
/**********************************************************************
* Copyright (c) 2013, 2014 Pieter Wuille *
* Copyright (c) 2013-2015 Pieter Wuille *
* Distributed under the MIT software license, see the accompanying *
* file COPYING or http://www.opensource.org/licenses/mit-license.php.*
**********************************************************************/

28
src/tests.c
View File

@@ -24,6 +24,8 @@
#include "openssl/obj_mac.h"
#endif
#include "contrib/lax_der_parsing.h"
#if !defined(VG_CHECK)
# if defined(VALGRIND)
# include <valgrind/memcheck.h>
@@ -2512,6 +2514,12 @@ int test_ecdsa_der_parse(const unsigned char *sig, size_t siglen, int certainly_
size_t len_der = 2048;
int parsed_der = 0, valid_der = 0, roundtrips_der = 0;
secp256k1_ecdsa_signature sig_der_lax;
unsigned char roundtrip_der_lax[2048];
unsigned char compact_der_lax[64];
size_t len_der_lax = 2048;
int parsed_der_lax = 0, valid_der_lax = 0, roundtrips_der_lax = 0;
#ifdef ENABLE_OPENSSL_TESTS
ECDSA_SIG *sig_openssl;
const unsigned char *sigptr;
@@ -2530,6 +2538,16 @@ int test_ecdsa_der_parse(const unsigned char *sig, size_t siglen, int certainly_
roundtrips_der = (len_der == siglen) && memcmp(roundtrip_der, sig, siglen) == 0;
}
parsed_der_lax = secp256k1_ecdsa_signature_parse_der_lax(ctx, &sig_der_lax, sig, siglen);
if (parsed_der_lax) {
ret |= (!secp256k1_ecdsa_signature_serialize_compact(ctx, compact_der_lax, &sig_der_lax)) << 10;
valid_der_lax = (memcmp(compact_der_lax, zeroes, 32) != 0) && (memcmp(compact_der_lax + 32, zeroes, 32) != 0);
}
if (valid_der_lax) {
ret |= (!secp256k1_ecdsa_signature_serialize_der(ctx, roundtrip_der_lax, &len_der_lax, &sig_der_lax)) << 11;
roundtrips_der_lax = (len_der_lax == siglen) && memcmp(roundtrip_der_lax, sig, siglen) == 0;
}
if (certainly_der) {
ret |= (!parsed_der) << 2;
}
@@ -2540,6 +2558,16 @@ int test_ecdsa_der_parse(const unsigned char *sig, size_t siglen, int certainly_
ret |= (!roundtrips_der) << 3;
}
if (valid_der) {
ret |= (!roundtrips_der_lax) << 12;
ret |= (len_der != len_der_lax) << 13;
ret |= (memcmp(roundtrip_der_lax, roundtrip_der, len_der) != 0) << 14;
}
ret |= (roundtrips_der != roundtrips_der_lax) << 15;
if (parsed_der) {
ret |= (!parsed_der_lax) << 16;
}
#ifdef ENABLE_OPENSSL_TESTS
sig_openssl = ECDSA_SIG_new();
sigptr = sig;