[Pkg-bitcoin-commits] [libsecp256k1] 08/27: ecdh: test NULL-checking of arguments
Jonas Smedegaard
dr at jones.dk
Tue Jan 10 21:47:16 UTC 2017
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js pushed a commit to branch master
in repository libsecp256k1.
commit 6f8ae2f3c06a8c7c2f167aa3000ef96a6867ed2d
Author: Andrew Poelstra <apoelstra at wpsoftware.net>
Date: Wed Nov 23 18:47:38 2016 +0000
ecdh: test NULL-checking of arguments
Boosts the ECDH module to 100% coverage
---
src/modules/ecdh/main_impl.h | 2 +-
src/modules/ecdh/tests_impl.h | 30 ++++++++++++++++++++++++++++++
2 files changed, 31 insertions(+), 1 deletion(-)
diff --git a/src/modules/ecdh/main_impl.h b/src/modules/ecdh/main_impl.h
index c23e4f8..9e30fb7 100644
--- a/src/modules/ecdh/main_impl.h
+++ b/src/modules/ecdh/main_impl.h
@@ -16,10 +16,10 @@ int secp256k1_ecdh(const secp256k1_context* ctx, unsigned char *result, const se
secp256k1_gej res;
secp256k1_ge pt;
secp256k1_scalar s;
+ VERIFY_CHECK(ctx != NULL);
ARG_CHECK(result != NULL);
ARG_CHECK(point != NULL);
ARG_CHECK(scalar != NULL);
- (void)ctx;
secp256k1_pubkey_load(ctx, &pt, point);
secp256k1_scalar_set_b32(&s, scalar, &overflow);
diff --git a/src/modules/ecdh/tests_impl.h b/src/modules/ecdh/tests_impl.h
index 7badc90..85a5d0a 100644
--- a/src/modules/ecdh/tests_impl.h
+++ b/src/modules/ecdh/tests_impl.h
@@ -7,6 +7,35 @@
#ifndef _SECP256K1_MODULE_ECDH_TESTS_
#define _SECP256K1_MODULE_ECDH_TESTS_
+void test_ecdh_api(void) {
+ /* Setup context that just counts errors */
+ secp256k1_context *tctx = secp256k1_context_create(SECP256K1_CONTEXT_SIGN);
+ secp256k1_pubkey point;
+ unsigned char res[32];
+ unsigned char s_one[32] = { 0 };
+ int32_t ecount = 0;
+ s_one[31] = 1;
+
+ secp256k1_context_set_error_callback(tctx, counting_illegal_callback_fn, &ecount);
+ secp256k1_context_set_illegal_callback(tctx, counting_illegal_callback_fn, &ecount);
+ CHECK(secp256k1_ec_pubkey_create(tctx, &point, s_one) == 1);
+
+ /* Check all NULLs are detected */
+ CHECK(secp256k1_ecdh(tctx, res, &point, s_one) == 1);
+ CHECK(ecount == 0);
+ CHECK(secp256k1_ecdh(tctx, NULL, &point, s_one) == 0);
+ CHECK(ecount == 1);
+ CHECK(secp256k1_ecdh(tctx, res, NULL, s_one) == 0);
+ CHECK(ecount == 2);
+ CHECK(secp256k1_ecdh(tctx, res, &point, NULL) == 0);
+ CHECK(ecount == 3);
+ CHECK(secp256k1_ecdh(tctx, res, &point, s_one) == 1);
+ CHECK(ecount == 3);
+
+ /* Cleanup */
+ secp256k1_context_destroy(tctx);
+}
+
void test_ecdh_generator_basepoint(void) {
unsigned char s_one[32] = { 0 };
secp256k1_pubkey point[2];
@@ -68,6 +97,7 @@ void test_bad_scalar(void) {
}
void run_ecdh_tests(void) {
+ test_ecdh_api();
test_ecdh_generator_basepoint();
test_bad_scalar();
}
--
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