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fix creating shared secret with ECC private only key

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This commit is contained in:
Jacob Barthelmeh 2017-08-24 17:05:17 -06:00
parent 59358fd91d
commit a308a56044
2 changed files with 45 additions and 2 deletions
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6
wolfcrypt/src/ecc.c
View File

@ -2689,7 +2689,8 @@ int wc_ecc_shared_secret(ecc_key* private_key, ecc_key* public_key, byte* out,
}
/* type valid? */
if (private_key->type != ECC_PRIVATEKEY) {
if (private_key->type != ECC_PRIVATEKEY &&
private_key->type != ECC_PRIVATEKEY_ONLY) {
return ECC_BAD_ARG_E;
}
@ -2879,7 +2880,8 @@ int wc_ecc_shared_secret_ex(ecc_key* private_key, ecc_point* point,
}
/* type valid? */
if (private_key->type != ECC_PRIVATEKEY) {
if (private_key->type != ECC_PRIVATEKEY &&
private_key->type != ECC_PRIVATEKEY_ONLY) {
return ECC_BAD_ARG_E;
}

41
wolfcrypt/test/test.c
View File

@ -10591,6 +10591,47 @@ static int ecc_test_make_pub(WC_RNG* rng)
#endif /* HAVE_ECC_SIGN */
#if defined(HAVE_ECC_DHE) && defined(HAVE_ECC_KEY_EXPORT)
/* now test private only key with creating a shared secret */
{
ecc_key pub;
x = sizeof(exportBuf);
ret = wc_ecc_export_private_only(&key, exportBuf, &x);
if (ret != 0)
goto exit_ecc_make_pub;
/* make private only key */
wc_ecc_free(&key);
wc_ecc_init(&key);
ret = wc_ecc_import_private_key(exportBuf, x, NULL, 0, &key);
if (ret != 0)
goto exit_ecc_make_pub;
/* check that public export fails with private only key */
x = sizeof(exportBuf);
ret = wc_ecc_export_x963_ex(&key, exportBuf, &x, 0);
if (ret == 0) {
ret = -6008;
goto exit_ecc_make_pub;
}
/* make public key for shared secret */
wc_ecc_init(&pub);
ret = wc_ecc_make_key(rng, 32, &pub);
if (ret != 0)
goto exit_ecc_make_pub;
x = sizeof(exportBuf);
ret = wc_ecc_shared_secret(&key, &pub, exportBuf, &x);
if (ret != 0) {
wc_ecc_free(&pub);
goto exit_ecc_make_pub;
}
wc_ecc_free(&pub);
}
#endif /* defined(HAVE_ECC_DHE) && defined(HAVE_ECC_KEY_EXPORT) */
exit_ecc_make_pub:
wc_ecc_del_point_h(pubPoint, HEAP_HINT);