/*
- * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1999-2020 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 <openssl/bn.h>
#include <openssl/err.h>
-#include "rsa_locl.h"
-
-int RSA_check_key(const RSA *key)
-{
- return RSA_check_key_ex(key, NULL);
-}
+#include "crypto/rsa.h"
+#include "rsa_local.h"
-int RSA_check_key_ex(const RSA *key, BN_GENCB *cb)
+#ifndef FIPS_MODE
+static int rsa_validate_keypair_multiprime(const RSA *key, BN_GENCB *cb)
{
BIGNUM *i, *j, *k, *l, *m;
BN_CTX *ctx;
- int r;
- int ret = 1;
+ int ret = 1, ex_primes = 0, idx;
+ RSA_PRIME_INFO *pinfo;
- if (!key->p || !key->q || !key->n || !key->e || !key->d) {
- RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_VALUE_MISSING);
+ if (key->p == NULL || key->q == NULL || key->n == NULL
+ || key->e == NULL || key->d == NULL) {
+ RSAerr(0, RSA_R_VALUE_MISSING);
return 0;
}
+ /* multi-prime? */
+ if (key->version == RSA_ASN1_VERSION_MULTI) {
+ ex_primes = sk_RSA_PRIME_INFO_num(key->prime_infos);
+ if (ex_primes <= 0
+ || (ex_primes + 2) > rsa_multip_cap(BN_num_bits(key->n))) {
+ RSAerr(0, RSA_R_INVALID_MULTI_PRIME_KEY);
+ return 0;
+ }
+ }
+
i = BN_new();
j = BN_new();
k = BN_new();
l = BN_new();
m = BN_new();
ctx = BN_CTX_new();
- if (i == NULL || j == NULL || k == NULL || l == NULL ||
- m == NULL || ctx == NULL) {
+ if (i == NULL || j == NULL || k == NULL || l == NULL
+ || m == NULL || ctx == NULL) {
ret = -1;
- RSAerr(RSA_F_RSA_CHECK_KEY_EX, ERR_R_MALLOC_FAILURE);
+ RSAerr(0, ERR_R_MALLOC_FAILURE);
goto err;
}
+ if (BN_is_one(key->e)) {
+ ret = 0;
+ RSAerr(0, RSA_R_BAD_E_VALUE);
+ }
+ if (!BN_is_odd(key->e)) {
+ ret = 0;
+ RSAerr(0, RSA_R_BAD_E_VALUE);
+ }
+
/* p prime? */
- r = BN_is_prime_ex(key->p, BN_prime_checks, NULL, cb);
- if (r != 1) {
- ret = r;
- if (r != 0)
- goto err;
- RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_P_NOT_PRIME);
+ if (BN_check_prime(key->p, NULL, cb) != 1) {
+ ret = 0;
+ RSAerr(0, RSA_R_P_NOT_PRIME);
}
/* q prime? */
- r = BN_is_prime_ex(key->q, BN_prime_checks, NULL, cb);
- if (r != 1) {
- ret = r;
- if (r != 0)
- goto err;
- RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_Q_NOT_PRIME);
+ if (BN_check_prime(key->q, NULL, cb) != 1) {
+ ret = 0;
+ RSAerr(0, RSA_R_Q_NOT_PRIME);
+ }
+
+ /* r_i prime? */
+ for (idx = 0; idx < ex_primes; idx++) {
+ pinfo = sk_RSA_PRIME_INFO_value(key->prime_infos, idx);
+ if (BN_check_prime(pinfo->r, NULL, cb) != 1) {
+ ret = 0;
+ RSAerr(0, RSA_R_MP_R_NOT_PRIME);
+ }
}
- /* n = p*q? */
- r = BN_mul(i, key->p, key->q, ctx);
- if (!r) {
+ /* n = p*q * r_3...r_i? */
+ if (!BN_mul(i, key->p, key->q, ctx)) {
ret = -1;
goto err;
}
-
+ for (idx = 0; idx < ex_primes; idx++) {
+ pinfo = sk_RSA_PRIME_INFO_value(key->prime_infos, idx);
+ if (!BN_mul(i, i, pinfo->r, ctx)) {
+ ret = -1;
+ goto err;
+ }
+ }
if (BN_cmp(i, key->n) != 0) {
ret = 0;
- RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_N_DOES_NOT_EQUAL_P_Q);
+ if (ex_primes)
+ RSAerr(0, RSA_R_N_DOES_NOT_EQUAL_PRODUCT_OF_PRIMES);
+ else
+ RSAerr(0, RSA_R_N_DOES_NOT_EQUAL_P_Q);
}
- /* d*e = 1 mod lcm(p-1,q-1)? */
-
- r = BN_sub(i, key->p, BN_value_one());
- if (!r) {
+ /* d*e = 1 mod \lambda(n)? */
+ if (!BN_sub(i, key->p, BN_value_one())) {
ret = -1;
goto err;
}
- r = BN_sub(j, key->q, BN_value_one());
- if (!r) {
+ if (!BN_sub(j, key->q, BN_value_one())) {
ret = -1;
goto err;
}
- /* now compute k = lcm(i,j) */
- r = BN_mul(l, i, j, ctx);
- if (!r) {
+ /* now compute k = \lambda(n) = LCM(i, j, r_3 - 1...) */
+ if (!BN_mul(l, i, j, ctx)) {
ret = -1;
goto err;
}
- r = BN_gcd(m, i, j, ctx);
- if (!r) {
+ if (!BN_gcd(m, i, j, ctx)) {
ret = -1;
goto err;
}
- r = BN_div(k, NULL, l, m, ctx); /* remainder is 0 */
- if (!r) {
+ for (idx = 0; idx < ex_primes; idx++) {
+ pinfo = sk_RSA_PRIME_INFO_value(key->prime_infos, idx);
+ if (!BN_sub(k, pinfo->r, BN_value_one())) {
+ ret = -1;
+ goto err;
+ }
+ if (!BN_mul(l, l, k, ctx)) {
+ ret = -1;
+ goto err;
+ }
+ if (!BN_gcd(m, m, k, ctx)) {
+ ret = -1;
+ goto err;
+ }
+ }
+ if (!BN_div(k, NULL, l, m, ctx)) { /* remainder is 0 */
ret = -1;
goto err;
}
-
- r = BN_mod_mul(i, key->d, key->e, k, ctx);
- if (!r) {
+ if (!BN_mod_mul(i, key->d, key->e, k, ctx)) {
ret = -1;
goto err;
}
if (!BN_is_one(i)) {
ret = 0;
- RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_D_E_NOT_CONGRUENT_TO_1);
+ RSAerr(0, RSA_R_D_E_NOT_CONGRUENT_TO_1);
}
if (key->dmp1 != NULL && key->dmq1 != NULL && key->iqmp != NULL) {
/* dmp1 = d mod (p-1)? */
- r = BN_sub(i, key->p, BN_value_one());
- if (!r) {
+ if (!BN_sub(i, key->p, BN_value_one())) {
ret = -1;
goto err;
}
-
- r = BN_mod(j, key->d, i, ctx);
- if (!r) {
+ if (!BN_mod(j, key->d, i, ctx)) {
ret = -1;
goto err;
}
-
if (BN_cmp(j, key->dmp1) != 0) {
ret = 0;
- RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_DMP1_NOT_CONGRUENT_TO_D);
+ RSAerr(0, RSA_R_DMP1_NOT_CONGRUENT_TO_D);
}
/* dmq1 = d mod (q-1)? */
- r = BN_sub(i, key->q, BN_value_one());
- if (!r) {
+ if (!BN_sub(i, key->q, BN_value_one())) {
ret = -1;
goto err;
}
-
- r = BN_mod(j, key->d, i, ctx);
- if (!r) {
+ if (!BN_mod(j, key->d, i, ctx)) {
ret = -1;
goto err;
}
-
if (BN_cmp(j, key->dmq1) != 0) {
ret = 0;
- RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_DMQ1_NOT_CONGRUENT_TO_D);
+ RSAerr(0, RSA_R_DMQ1_NOT_CONGRUENT_TO_D);
}
/* iqmp = q^-1 mod p? */
ret = -1;
goto err;
}
-
if (BN_cmp(i, key->iqmp) != 0) {
ret = 0;
- RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_IQMP_NOT_INVERSE_OF_Q);
+ RSAerr(0, RSA_R_IQMP_NOT_INVERSE_OF_Q);
+ }
+ }
+
+ for (idx = 0; idx < ex_primes; idx++) {
+ pinfo = sk_RSA_PRIME_INFO_value(key->prime_infos, idx);
+ /* d_i = d mod (r_i - 1)? */
+ if (!BN_sub(i, pinfo->r, BN_value_one())) {
+ ret = -1;
+ goto err;
+ }
+ if (!BN_mod(j, key->d, i, ctx)) {
+ ret = -1;
+ goto err;
+ }
+ if (BN_cmp(j, pinfo->d) != 0) {
+ ret = 0;
+ RSAerr(0, RSA_R_MP_EXPONENT_NOT_CONGRUENT_TO_D);
+ }
+ /* t_i = R_i ^ -1 mod r_i ? */
+ if (!BN_mod_inverse(i, pinfo->pp, pinfo->r, ctx)) {
+ ret = -1;
+ goto err;
+ }
+ if (BN_cmp(i, pinfo->t) != 0) {
+ ret = 0;
+ RSAerr(0, RSA_R_MP_COEFFICIENT_NOT_INVERSE_OF_R);
}
}
BN_free(l);
BN_free(m);
BN_CTX_free(ctx);
- return (ret);
+ return ret;
+}
+#endif /* FIPS_MODE */
+
+int rsa_validate_public(const RSA *key)
+{
+ return rsa_sp800_56b_check_public(key);
+}
+
+int rsa_validate_private(const RSA *key)
+{
+ return rsa_sp800_56b_check_private(key);
+}
+
+int rsa_validate_pairwise(const RSA *key)
+{
+#ifdef FIPS_MODE
+ return rsa_sp800_56b_check_keypair(key, NULL, -1, RSA_bits(key));
+#else
+ return rsa_validate_keypair_multiprime(key, NULL);
+#endif
+}
+
+int RSA_check_key(const RSA *key)
+{
+ return RSA_check_key_ex(key, NULL);
+}
+
+int RSA_check_key_ex(const RSA *key, BN_GENCB *cb)
+{
+#ifdef FIPS_MODE
+ return rsa_validate_public(key)
+ && rsa_validate_private(key)
+ && rsa_validate_pairwise(key);
+#else
+ return rsa_validate_keypair_multiprime(key, cb);
+#endif /* FIPS_MODE */
}
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