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free WOLFSSL_BIGNUM when wolfSSL_BN_mod_inverse() fails if dynamic

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This commit is contained in:
Chris Conlon
2017-12-20 17:04:59 -07:00
parent 51c3427a27
commit 6bb60581ea
1 changed files with 13 additions and 1 deletions
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14
src/ssl.c
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@ -19227,11 +19227,13 @@ WOLFSSL_BIGNUM *wolfSSL_BN_mod_inverse(WOLFSSL_BIGNUM *r,
const WOLFSSL_BIGNUM *n, const WOLFSSL_BIGNUM *n,
WOLFSSL_BN_CTX *ctx) WOLFSSL_BN_CTX *ctx)
{ {
WOLFSSL_ENTER("wolfSSL_BN_mod_inverse"); int dynamic = 0;
/* ctx is not used */ /* ctx is not used */
(void)ctx; (void)ctx;
WOLFSSL_ENTER("wolfSSL_BN_mod_inverse");
/* check parameter */ /* check parameter */
if (r == NULL) { if (r == NULL) {
r = wolfSSL_BN_new(); r = wolfSSL_BN_new();
@ -19239,15 +19241,22 @@ WOLFSSL_BIGNUM *wolfSSL_BN_mod_inverse(WOLFSSL_BIGNUM *r,
WOLFSSL_MSG("WolfSSL_BN_new() failed"); WOLFSSL_MSG("WolfSSL_BN_new() failed");
return NULL; return NULL;
} }
dynamic = 1;
} }
if (a == NULL) { if (a == NULL) {
WOLFSSL_MSG("a NULL error"); WOLFSSL_MSG("a NULL error");
if (dynamic == 1) {
wolfSSL_BN_free(r);
}
return NULL; return NULL;
} }
if (n == NULL) { if (n == NULL) {
WOLFSSL_MSG("n NULL error"); WOLFSSL_MSG("n NULL error");
if (dynamic == 1) {
wolfSSL_BN_free(r);
}
return NULL; return NULL;
} }
@ -19255,6 +19264,9 @@ WOLFSSL_BIGNUM *wolfSSL_BN_mod_inverse(WOLFSSL_BIGNUM *r,
if (mp_invmod((mp_int *)a->internal,(mp_int *)n->internal, if (mp_invmod((mp_int *)a->internal,(mp_int *)n->internal,
(mp_int*)r->internal) == MP_VAL){ (mp_int*)r->internal) == MP_VAL){
WOLFSSL_MSG("mp_invmod() error"); WOLFSSL_MSG("mp_invmod() error");
if (dynamic == 1) {
wolfSSL_BN_free(r);
}
return NULL; return NULL;
} }