avoid potential spurious BN_free()
authorBodo Möller <bodo@openssl.org>
Tue, 23 Aug 2005 04:14:40 +0000 (04:14 +0000)
committerBodo Möller <bodo@openssl.org>
Tue, 23 Aug 2005 04:14:40 +0000 (04:14 +0000)
Submitted by: David Heine <dlheine@suif.Stanford.EDU>

crypto/bn/bn_sqrt.c

index c1eb7f6..6beaf9e 100644 (file)
@@ -83,7 +83,8 @@ BIGNUM *BN_mod_sqrt(BIGNUM *in, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx)
                                goto end;
                        if (!BN_set_word(ret, BN_is_bit_set(a, 0)))
                                {
-                               BN_free(ret);
+                               if (ret != in)
+                                       BN_free(ret);
                                return NULL;
                                }
                        bn_check_top(ret);
@@ -102,7 +103,8 @@ BIGNUM *BN_mod_sqrt(BIGNUM *in, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx)
                        goto end;
                if (!BN_set_word(ret, BN_is_one(a)))
                        {
-                       BN_free(ret);
+                       if (ret != in)
+                               BN_free(ret);
                        return NULL;
                        }
                bn_check_top(ret);