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test: add script compression coverage for not-on-curve P2PK outputs

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This commit is contained in:
Sebastian Falbesoner 2023-07-30 22:03:11 +02:00
parent 651fb034d8
commit 28287cfbe1
1 changed files with 33 additions and 0 deletions
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33
src/test/compress_tests.cpp
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@ -4,6 +4,7 @@
#include <compressor.h>
#include <script/script.h>
#include <test/util/random.h>
#include <test/util/setup_common.h>
#include <stdint.h>
@ -131,4 +132,36 @@ BOOST_AUTO_TEST_CASE(compress_script_to_uncompressed_pubkey_id)
BOOST_CHECK_EQUAL(out[0], 0x04 | (script[65] & 0x01)); // least significant bit (lsb) of last char of pubkey is mapped into out[0]
}
BOOST_AUTO_TEST_CASE(compress_p2pk_scripts_not_on_curve)
{
XOnlyPubKey x_not_on_curve;
do {
x_not_on_curve = XOnlyPubKey(g_insecure_rand_ctx.randbytes(32));
} while (x_not_on_curve.IsFullyValid());
// Check that P2PK script with uncompressed pubkey [=> OP_PUSH65 <0x04 .....> OP_CHECKSIG]
// which is not fully valid (i.e. point is not on curve) can't be compressed
std::vector<unsigned char> pubkey_raw(65, 0);
pubkey_raw[0] = 4;
std::copy(x_not_on_curve.begin(), x_not_on_curve.end(), &pubkey_raw[1]);
CPubKey pubkey_not_on_curve(pubkey_raw);
assert(pubkey_not_on_curve.IsValid());
assert(!pubkey_not_on_curve.IsFullyValid());
CScript script = CScript() << ToByteVector(pubkey_not_on_curve) << OP_CHECKSIG;
BOOST_CHECK_EQUAL(script.size(), 67U);
CompressedScript out;
bool done = CompressScript(script, out);
BOOST_CHECK_EQUAL(done, false);
// Check that compressed P2PK script with uncompressed pubkey that is not fully
// valid (i.e. x coordinate of the pubkey is not on curve) can't be decompressed
CompressedScript compressed_script(x_not_on_curve.begin(), x_not_on_curve.end());
for (unsigned int compression_id : {4, 5}) {
CScript uncompressed_script;
bool success = DecompressScript(uncompressed_script, compression_id, compressed_script);
BOOST_CHECK_EQUAL(success, false);
}
}
BOOST_AUTO_TEST_SUITE_END()