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Added NULL check to BN_clear() & BN_CTX_end()

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Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8518)
This commit is contained in:
Shane Lontis 2019-03-19 09:58:09 +10:00 committed by Richard Levitte
parent 226f2bf191
commit ce1415ed2c
16 changed files with 31 additions and 54 deletions
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2
crypto/bn/bn_ctx.c
View File

@ -184,6 +184,8 @@ void BN_CTX_start(BN_CTX *ctx)
void BN_CTX_end(BN_CTX *ctx)
{
if (ctx == NULL)
return;
CTXDBG("ENTER BN_CTX_end()", ctx);
if (ctx->err_stack)
ctx->err_stack--;

2
crypto/bn/bn_lib.c
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@ -338,6 +338,8 @@ void BN_swap(BIGNUM *a, BIGNUM *b)
void BN_clear(BIGNUM *a)
{
if (a == NULL)
return;
bn_check_top(a);
if (a->d != NULL)
OPENSSL_cleanse(a->d, sizeof(*a->d) * a->dmax);

3
crypto/bn/bn_prime.c
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@ -170,8 +170,7 @@ int BN_generate_prime_ex(BIGNUM *ret, int bits, int safe,
found = 1;
err:
OPENSSL_free(mods);
if (ctx != NULL)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(ctx);
bn_check_top(ret);
return found;

18
crypto/dh/dh_check.c
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@ -58,10 +58,8 @@ int DH_check_params(const DH *dh, int *ret)
ok = 1;
err:
if (ctx != NULL) {
BN_CTX_end(ctx);
BN_CTX_free(ctx);
}
BN_CTX_end(ctx);
BN_CTX_free(ctx);
return ok;
}
@ -171,10 +169,8 @@ int DH_check(const DH *dh, int *ret)
}
ok = 1;
err:
if (ctx != NULL) {
BN_CTX_end(ctx);
BN_CTX_free(ctx);
}
BN_CTX_end(ctx);
BN_CTX_free(ctx);
return ok;
}
@ -225,9 +221,7 @@ int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *ret)
ok = 1;
err:
if (ctx != NULL) {
BN_CTX_end(ctx);
BN_CTX_free(ctx);
}
BN_CTX_end(ctx);
BN_CTX_free(ctx);
return ok;
}

6
crypto/dh/dh_gen.c
View File

@ -122,9 +122,7 @@ static int dh_builtin_genparams(DH *ret, int prime_len, int generator,
ok = 0;
}
if (ctx != NULL) {
BN_CTX_end(ctx);
BN_CTX_free(ctx);
}
BN_CTX_end(ctx);
BN_CTX_free(ctx);
return ok;
}

6
crypto/dh/dh_key.c
View File

@ -205,10 +205,8 @@ static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
ret = BN_bn2bin(tmp, key);
err:
if (ctx != NULL) {
BN_CTX_end(ctx);
BN_CTX_free(ctx);
}
BN_CTX_end(ctx);
BN_CTX_free(ctx);
return ret;
}

6
crypto/dsa/dsa_gen.c
View File

@ -292,8 +292,7 @@ int dsa_builtin_paramgen(DSA *ret, size_t bits, size_t qbits,
if (seed_out)
memcpy(seed_out, seed, qsize);
}
if (ctx)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(ctx);
BN_MONT_CTX_free(mont);
return ok;
@ -607,8 +606,7 @@ int dsa_builtin_paramgen2(DSA *ret, size_t L, size_t N,
OPENSSL_free(seed);
if (seed_out != seed_tmp)
OPENSSL_free(seed_tmp);
if (ctx)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(ctx);
BN_MONT_CTX_free(mont);
EVP_MD_CTX_free(mctx);

3
crypto/ec/ec2_smpl.c
View File

@ -204,8 +204,7 @@ int ec_GF2m_simple_group_check_discriminant(const EC_GROUP *group,
ret = 1;
err:
if (ctx != NULL)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(new_ctx);
return ret;
}

3
crypto/ec/ec_lib.c
View File

@ -1079,8 +1079,7 @@ static int ec_field_inverse_mod_ord(const EC_GROUP *group, BIGNUM *r,
ret = 1;
err:
if (ctx != NULL)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(new_ctx);
return ret;
}

3
crypto/ec/ec_mult.c
View File

@ -948,8 +948,7 @@ int ec_wNAF_precompute_mult(EC_GROUP *group, BN_CTX *ctx)
ret = 1;
err:
if (ctx != NULL)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(new_ctx);
EC_ec_pre_comp_free(pre_comp);
if (points) {

3
crypto/ec/ecdh_ossl.c
View File

@ -113,8 +113,7 @@ int ecdh_simple_compute_key(unsigned char **pout, size_t *poutlen,
err:
EC_POINT_clear_free(tmp);
if (ctx)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(ctx);
OPENSSL_free(buf);
return ret;

3
crypto/ec/ecp_nistz256.c
View File

@ -888,8 +888,7 @@ __owur static int ecp_nistz256_mult_precompute(EC_GROUP *group, BN_CTX *ctx)
ret = 1;
err:
if (ctx != NULL)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(new_ctx);
EC_nistz256_pre_comp_free(pre_comp);

6
crypto/ec/ecp_smpl.c
View File

@ -307,8 +307,7 @@ int ec_GFp_simple_group_check_discriminant(const EC_GROUP *group, BN_CTX *ctx)
ret = 1;
err:
if (ctx != NULL)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(new_ctx);
return ret;
}
@ -787,8 +786,7 @@ int ec_GFp_simple_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
ret = 1;
end:
if (ctx) /* otherwise we already called BN_CTX_end */
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(new_ctx);
return ret;
}

3
crypto/rsa/rsa_gen.c
View File

@ -393,8 +393,7 @@ static int rsa_builtin_keygen(RSA *rsa, int bits, int primes, BIGNUM *e_value,
RSAerr(RSA_F_RSA_BUILTIN_KEYGEN, ERR_LIB_BN);
ok = 0;
}
if (ctx != NULL)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(ctx);
return ok;
#endif /* FIPS_MODE */

12
crypto/rsa/rsa_ossl.c
View File

@ -148,8 +148,7 @@ static int rsa_ossl_public_encrypt(int flen, const unsigned char *from,
*/
r = BN_bn2binpad(ret, to, num);
err:
if (ctx != NULL)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(ctx);
OPENSSL_clear_free(buf, num);
return r;
@ -354,8 +353,7 @@ static int rsa_ossl_private_encrypt(int flen, const unsigned char *from,
*/
r = BN_bn2binpad(res, to, num);
err:
if (ctx != NULL)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(ctx);
OPENSSL_clear_free(buf, num);
return r;
@ -484,8 +482,7 @@ static int rsa_ossl_private_decrypt(int flen, const unsigned char *from,
err_clear_last_constant_time(r >= 0);
err:
if (ctx != NULL)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(ctx);
OPENSSL_clear_free(buf, num);
return r;
@ -581,8 +578,7 @@ static int rsa_ossl_public_decrypt(int flen, const unsigned char *from,
RSAerr(RSA_F_RSA_OSSL_PUBLIC_DECRYPT, RSA_R_PADDING_CHECK_FAILED);
err:
if (ctx != NULL)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(ctx);
OPENSSL_clear_free(buf, num);
return r;

6
crypto/rsa/rsa_x931g.c
View File

@ -133,8 +133,7 @@ int RSA_X931_derive_ex(RSA *rsa, BIGNUM *p1, BIGNUM *p2, BIGNUM *q1,
ret = 1;
err:
if (ctx)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(ctx);
BN_CTX_free(ctx2);
@ -188,8 +187,7 @@ int RSA_X931_generate_key_ex(RSA *rsa, int bits, const BIGNUM *e,
ok = 1;
error:
if (ctx)
BN_CTX_end(ctx);
BN_CTX_end(ctx);
BN_CTX_free(ctx);
if (ok)