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tests_exhaustive: check the result of secp256k1_ecdsa_sign #960

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Jul 3, 2021
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tests_exhaustive: check the result of secp256k1_ecdsa_sign #960

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4 changes: 3 additions & 1 deletion src/tests_exhaustive.c
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Original file line number Diff line number Diff line change
Expand Up @@ -302,6 +302,7 @@ void test_exhaustive_sign(const secp256k1_context *ctx, const secp256k1_ge *grou
if (skip_section(&iter)) continue;
for (k = 1; k < EXHAUSTIVE_TEST_ORDER; k++) { /* nonce */
const int starting_k = k;
int ret;
secp256k1_ecdsa_signature sig;
secp256k1_scalar sk, msg, r, s, expected_r;
unsigned char sk32[32], msg32[32];
Expand All @@ -310,7 +311,8 @@ void test_exhaustive_sign(const secp256k1_context *ctx, const secp256k1_ge *grou
secp256k1_scalar_get_b32(sk32, &sk);
secp256k1_scalar_get_b32(msg32, &msg);

secp256k1_ecdsa_sign(ctx, &sig, msg32, sk32, secp256k1_nonce_function_smallint, &k);
ret = secp256k1_ecdsa_sign(ctx, &sig, msg32, sk32, secp256k1_nonce_function_smallint, &k);
CHECK(ret == 1);

secp256k1_ecdsa_signature_load(ctx, &r, &s, &sig);
/* Note that we compute expected_r *after* signing -- this is important
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