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Fix for "wc_ecc_make_key_ex" if call to rng fails. Issue only applies to !USE_FAST_MATH case on failure response from call to "wc_RNG_GenerateBlock".

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This commit is contained in:
David Garske
2016-11-10 11:39:29 -08:00
parent af44b2527a
commit 1aca9a6079
1 changed files with 19 additions and 15 deletions
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34
wolfcrypt/src/ecc.c
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@ -2505,23 +2505,27 @@ int wc_ecc_make_key_ex(WC_RNG* rng, int keysize, ecc_key* key, int curve_id)
/* make up random string */
err = wc_RNG_GenerateBlock(rng, buf, keysize);
if (err != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return err;
}
/* setup the key variables */
if (err == 0) {
err = mp_init_multi(&key->k, &prime, &order, &a, NULL, NULL);
if (err == MP_OKAY) {
#ifndef ALT_ECC_SIZE
err = mp_init_multi(key->pubkey.x, key->pubkey.y, key->pubkey.z,
NULL, NULL, NULL);
#else
key->pubkey.x = (mp_int*)&key->pubkey.xyz[0];
key->pubkey.y = (mp_int*)&key->pubkey.xyz[1];
key->pubkey.z = (mp_int*)&key->pubkey.xyz[2];
alt_fp_init(key->pubkey.x);
alt_fp_init(key->pubkey.y);
alt_fp_init(key->pubkey.z);
#endif
}
err = mp_init_multi(&key->k, &prime, &order, &a, NULL, NULL);
if (err == MP_OKAY) {
#ifndef ALT_ECC_SIZE
err = mp_init_multi(key->pubkey.x, key->pubkey.y, key->pubkey.z,
NULL, NULL, NULL);
#else
key->pubkey.x = (mp_int*)&key->pubkey.xyz[0];
key->pubkey.y = (mp_int*)&key->pubkey.xyz[1];
key->pubkey.z = (mp_int*)&key->pubkey.xyz[2];
alt_fp_init(key->pubkey.x);
alt_fp_init(key->pubkey.y);
alt_fp_init(key->pubkey.z);
#endif
}
if (err == MP_OKAY) {