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test_ecpub: test that we can decode the DER we encoded

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We should be able to round-trip through the encoded DER form of the
EC public key and get back something that compares as equal to the
original key.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14291)
This commit is contained in:
Benjamin Kaduk 2021-02-19 13:20:00 -08:00 committed by Richard Levitte
parent ad7cb0bf5c
commit 3d36472660
1 changed files with 25 additions and 0 deletions

25
test/evp_extra_test.c

@ -2429,6 +2429,11 @@ static int test_ecpub(int idx)
unsigned char *p;
EVP_PKEY *pkey = NULL;
EVP_PKEY_CTX *ctx = NULL;
# ifndef OPENSSL_NO_DEPRECATED_3_0
const unsigned char *q;
EVP_PKEY *pkey2 = NULL;
EC_KEY *ec = NULL;
# endif
nid = ecpub_nids[idx];
@ -2449,11 +2454,31 @@ static int test_ecpub(int idx)
|| !TEST_int_eq(len, savelen))
goto done;
# ifndef OPENSSL_NO_DEPRECATED_3_0
/* Now try to decode the just-created DER. */
q = buf;
if (!TEST_ptr((pkey2 = EVP_PKEY_new()))
|| !TEST_ptr((ec = EC_KEY_new_by_curve_name(nid)))
|| !TEST_true(EVP_PKEY_assign_EC_KEY(pkey2, ec)))
goto done;
/* EC_KEY ownership transferred */
ec = NULL;
if (!TEST_ptr(d2i_PublicKey(EVP_PKEY_EC, &pkey2, &q, savelen)))
goto done;
/* The keys should match. */
if (!TEST_int_eq(EVP_PKEY_cmp(pkey, pkey2), 1))
goto done;
# endif
ret = 1;
done:
EVP_PKEY_CTX_free(ctx);
EVP_PKEY_free(pkey);
# ifndef OPENSSL_NO_DEPRECATED_3_0
EVP_PKEY_free(pkey2);
EC_KEY_free(ec);
# endif
return ret;
}
#endif