/*
- * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
+/*
+ * RSA low level APIs are deprecated for public use, but still ok for
+ * internal use.
+ */
+#include "internal/deprecated.h"
+
#include "internal/cryptlib.h"
-#include "internal/bn_int.h"
-#include "rsa_locl.h"
+#include "crypto/bn.h"
+#include "rsa_local.h"
+#include "internal/constant_time.h"
static int rsa_ossl_public_encrypt(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding);
}
}
- if ((ctx = BN_CTX_new()) == NULL)
+ if ((ctx = BN_CTX_new_ex(rsa->libctx)) == NULL)
goto err;
BN_CTX_start(ctx);
f = BN_CTX_get(ctx);
switch (padding) {
case RSA_PKCS1_PADDING:
- i = RSA_padding_add_PKCS1_type_2(buf, num, from, flen);
+ i = ossl_rsa_padding_add_PKCS1_type_2_ex(rsa->libctx, buf, num,
+ from, flen);
break;
case RSA_PKCS1_OAEP_PADDING:
- i = RSA_padding_add_PKCS1_OAEP(buf, num, from, flen, NULL, 0);
+ i = ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(rsa->libctx, buf, num,
+ from, flen, NULL, 0,
+ NULL, NULL);
break;
+#ifndef FIPS_MODULE
case RSA_SSLV23_PADDING:
- i = RSA_padding_add_SSLv23(buf, num, from, flen);
+ i = ossl_rsa_padding_add_SSLv23_ex(rsa->libctx, buf, num, from, flen);
break;
+#endif
case RSA_NO_PADDING:
i = RSA_padding_add_none(buf, num, from, flen);
break;
*/
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;
BIGNUM *unblind = NULL;
BN_BLINDING *blinding = NULL;
- if ((ctx = BN_CTX_new()) == NULL)
+ if ((ctx = BN_CTX_new_ex(rsa->libctx)) == NULL)
goto err;
BN_CTX_start(ctx);
f = BN_CTX_get(ctx);
goto err;
}
+ if (rsa->flags & RSA_FLAG_CACHE_PUBLIC)
+ if (!BN_MONT_CTX_set_locked(&rsa->_method_mod_n, rsa->lock,
+ rsa->n, ctx))
+ goto err;
+
if (!(rsa->flags & RSA_FLAG_NO_BLINDING)) {
blinding = rsa_get_blinding(rsa, &local_blinding, ctx);
if (blinding == NULL) {
RSAerr(RSA_F_RSA_OSSL_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
goto err;
}
+ if (rsa->d == NULL) {
+ RSAerr(RSA_F_RSA_OSSL_PRIVATE_ENCRYPT, RSA_R_MISSING_PRIVATE_KEY);
+ BN_free(d);
+ goto err;
+ }
BN_with_flags(d, rsa->d, BN_FLG_CONSTTIME);
- if (rsa->flags & RSA_FLAG_CACHE_PUBLIC)
- if (!BN_MONT_CTX_set_locked(&rsa->_method_mod_n, rsa->lock,
- rsa->n, ctx)) {
- BN_free(d);
- goto err;
- }
-
if (!rsa->meth->bn_mod_exp(ret, f, d, rsa->n, ctx,
rsa->_method_mod_n)) {
BN_free(d);
*/
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;
BIGNUM *unblind = NULL;
BN_BLINDING *blinding = NULL;
- if ((ctx = BN_CTX_new()) == NULL)
+ if ((ctx = BN_CTX_new_ex(rsa->libctx)) == NULL)
goto err;
BN_CTX_start(ctx);
f = BN_CTX_get(ctx);
RSAerr(RSA_F_RSA_OSSL_PRIVATE_DECRYPT, ERR_R_MALLOC_FAILURE);
goto err;
}
+ if (rsa->d == NULL) {
+ RSAerr(RSA_F_RSA_OSSL_PRIVATE_DECRYPT, RSA_R_MISSING_PRIVATE_KEY);
+ BN_free(d);
+ goto err;
+ }
BN_with_flags(d, rsa->d, BN_FLG_CONSTTIME);
if (rsa->flags & RSA_FLAG_CACHE_PUBLIC)
goto err;
j = BN_bn2binpad(ret, buf, num);
+ if (j < 0)
+ goto err;
switch (padding) {
case RSA_PKCS1_PADDING:
case RSA_PKCS1_OAEP_PADDING:
r = RSA_padding_check_PKCS1_OAEP(to, num, buf, j, num, NULL, 0);
break;
+#ifndef FIPS_MODULE
case RSA_SSLV23_PADDING:
r = RSA_padding_check_SSLv23(to, num, buf, j, num);
break;
+#endif
case RSA_NO_PADDING:
memcpy(to, buf, (r = j));
break;
RSAerr(RSA_F_RSA_OSSL_PRIVATE_DECRYPT, RSA_R_UNKNOWN_PADDING_TYPE);
goto err;
}
- if (r < 0)
- RSAerr(RSA_F_RSA_OSSL_PRIVATE_DECRYPT, RSA_R_PADDING_CHECK_FAILED);
+#ifndef FIPS_MODULE
+ /*
+ * This trick doesn't work in the FIPS provider because libcrypto manages
+ * the error stack. Instead we opt not to put an error on the stack at all
+ * in case of padding failure in the FIPS provider.
+ */
+ RSAerr(RSA_F_RSA_OSSL_PRIVATE_DECRYPT, RSA_R_PADDING_CHECK_FAILED);
+ err_clear_last_constant_time(1 & ~constant_time_msb(r));
+#endif
err:
- if (ctx != NULL)
- BN_CTX_end(ctx);
+ BN_CTX_end(ctx);
BN_CTX_free(ctx);
OPENSSL_clear_free(buf, num);
return r;
}
}
- if ((ctx = BN_CTX_new()) == NULL)
+ if ((ctx = BN_CTX_new_ex(rsa->libctx)) == NULL)
goto err;
BN_CTX_start(ctx);
f = BN_CTX_get(ctx);
goto err;
i = BN_bn2binpad(ret, buf, num);
+ if (i < 0)
+ goto err;
switch (padding) {
case RSA_PKCS1_PADDING:
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;
static int rsa_ossl_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
{
- BIGNUM *r1, *m1, *vrfy, *r2, *m[RSA_MAX_PRIME_NUM - 2];
- int ret = 0, i, ex_primes = 0, smooth = 0;
+ BIGNUM *r1, *m1, *vrfy;
+ int ret = 0, smooth = 0;
+#ifndef FIPS_MODULE
+ BIGNUM *r2, *m[RSA_MAX_PRIME_NUM - 2];
+ int i, ex_primes = 0;
RSA_PRIME_INFO *pinfo;
+#endif
BN_CTX_start(ctx);
r1 = BN_CTX_get(ctx);
+#ifndef FIPS_MODULE
r2 = BN_CTX_get(ctx);
+#endif
m1 = BN_CTX_get(ctx);
vrfy = BN_CTX_get(ctx);
if (vrfy == NULL)
goto err;
+#ifndef FIPS_MODULE
if (rsa->version == RSA_ASN1_VERSION_MULTI
&& ((ex_primes = sk_RSA_PRIME_INFO_num(rsa->prime_infos)) <= 0
|| ex_primes > RSA_MAX_PRIME_NUM - 2))
goto err;
+#endif
if (rsa->flags & RSA_FLAG_CACHE_PRIVATE) {
BIGNUM *factor = BN_new();
BN_free(factor);
goto err;
}
+#ifndef FIPS_MODULE
for (i = 0; i < ex_primes; i++) {
pinfo = sk_RSA_PRIME_INFO_value(rsa->prime_infos, i);
BN_with_flags(factor, pinfo->r, BN_FLG_CONSTTIME);
goto err;
}
}
+#endif
/*
* We MUST free |factor| before any further use of the prime factors
*/
BN_free(factor);
- smooth = (ex_primes == 0)
- && (rsa->meth->bn_mod_exp == BN_mod_exp_mont)
+ smooth = (rsa->meth->bn_mod_exp == BN_mod_exp_mont)
+#ifndef FIPS_MODULE
+ && (ex_primes == 0)
+#endif
&& (BN_num_bits(rsa->q) == BN_num_bits(rsa->p));
}
*/
|| !bn_mod_sub_fixed_top(r1, r1, m1, rsa->p)
- /* r0 = r0 * iqmp mod p */
+ /* r1 = r1 * iqmp mod p */
|| !bn_to_mont_fixed_top(r1, r1, rsa->_method_mod_p, ctx)
|| !bn_mul_mont_fixed_top(r1, r1, rsa->iqmp, rsa->_method_mod_p,
ctx)
+ /* r0 = r1 * q + m1 */
|| !bn_mul_fixed_top(r0, r1, rsa->q, ctx)
|| !bn_mod_add_fixed_top(r0, r0, m1, rsa->n))
goto err;
BN_free(dmp1);
}
+#ifndef FIPS_MODULE
/*
* calculate m_i in multi-prime case
*
BN_free(cc);
BN_free(di);
}
+#endif
if (!BN_sub(r0, r0, m1))
goto err;
if (!BN_add(r0, r1, m1))
goto err;
+#ifndef FIPS_MODULE
/* add m_i to m in multi-prime case */
if (ex_primes > 0) {
BIGNUM *pr2 = BN_new();
}
BN_free(pr2);
}
+#endif
tail:
if (rsa->e && rsa->n) {
static int rsa_ossl_finish(RSA *rsa)
{
+#ifndef FIPS_MODULE
int i;
RSA_PRIME_INFO *pinfo;
- BN_MONT_CTX_free(rsa->_method_mod_n);
- BN_MONT_CTX_free(rsa->_method_mod_p);
- BN_MONT_CTX_free(rsa->_method_mod_q);
for (i = 0; i < sk_RSA_PRIME_INFO_num(rsa->prime_infos); i++) {
pinfo = sk_RSA_PRIME_INFO_value(rsa->prime_infos, i);
BN_MONT_CTX_free(pinfo->m);
}
+#endif
+
+ BN_MONT_CTX_free(rsa->_method_mod_n);
+ BN_MONT_CTX_free(rsa->_method_mod_p);
+ BN_MONT_CTX_free(rsa->_method_mod_q);
return 1;
}
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