-#include <openssl/rsa.h>
-
-
-int RSA_check_key(RSA *key)
- {
- BIGNUM *i, *j, *k, *l, *m;
- BN_CTX *ctx;
- int ret=1;
-
- 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)
- {
- ret = 0;
- RSAerr(RSA_F_RSA_CHECK_KEY, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- /* p prime? */
- if (BN_is_prime(key->p, BN_prime_checks, NULL, NULL, NULL) != 1)
- {
- ret = 0;
- if (ERR_GET_REASON(ERR_peek_error()) == ERR_R_MALLOC_FAILURE)
- goto err;
- RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_P_NOT_PRIME);
- }
-
- /* q prime? */
- if (BN_is_prime(key->q, BN_prime_checks, NULL, NULL, NULL) != 1)
- {
- ret = 0;
- if (ERR_GET_REASON(ERR_peek_error()) == ERR_R_MALLOC_FAILURE)
- goto err;
- RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_Q_NOT_PRIME);
- }
-
- /* n = p*q? */
- BN_mul(i, key->p, key->q, ctx);
- if (BN_cmp(i, key->n) != 0)
- {
- ret = 0;
- if (ERR_GET_REASON(ERR_peek_error()) == ERR_R_MALLOC_FAILURE)
- goto err;
- RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_N_DOES_NOT_EQUAL_PQ);
- }
-
- /* dmp1 = d mod (p-1)? */
- BN_sub(i, key->p, BN_value_one());
- BN_mod(j, key->d, i, ctx);
- if (BN_cmp(j, key->dmp1) != 0)
- {
- ret = 0;
- if (ERR_GET_REASON(ERR_peek_error()) == ERR_R_MALLOC_FAILURE)
- goto err;
- RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_DMP1_NOT_CONGRUENT_TO_D);
- }
-
- /* dmq1 = d mod (q-1)? */
- BN_sub(i, key->q, BN_value_one());
- BN_mod(j, key->d, i, ctx);
- if (BN_cmp(j, key->dmq1) != 0)
- {
- ret = 0;
- if (ERR_GET_REASON(ERR_peek_error()) == ERR_R_MALLOC_FAILURE)
- goto err;
- RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_DMQ1_NOT_CONGRUENT_TO_D);
- }
-
- /* iqmp = q^-1 mod p? */
- BN_mod_inverse(i, key->q, key->p, ctx);
- if (BN_cmp(i, key->iqmp) != 0)
- {
- ret = 0;
- if (ERR_GET_REASON(ERR_peek_error()) == ERR_R_MALLOC_FAILURE)
- goto err;
- RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_IQMP_NOT_INVERSE_OF_Q);
- }
-
- /* d*e = 1 mod lcm(p-1,q-1)? */
- BN_sub(i, key->p, BN_value_one());
- BN_sub(j, key->q, BN_value_one());
- /* now compute k = lcm(i,j) */
- BN_mul(l, i, j, ctx);
- BN_gcd(m, i, j, ctx);
- BN_div(k, NULL, l, m, ctx); /* remainder is 0 */
- BN_mod_mul(i, key->d, key->e, k, ctx);
- if (!BN_is_one(i))
- {
- ret = 0;
- if (ERR_GET_REASON(ERR_peek_error()) == ERR_R_MALLOC_FAILURE)
- goto err;
- RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_DE_NOT_CONGRUENT_TO_1);
- }
-
+#include "rsa_locl.h"
+
+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)
+{
+ BIGNUM *i, *j, *k, *l, *m;
+ BN_CTX *ctx;
+ int ret = 1;
+
+ if (key->p == NULL || key->q == NULL || key->n == NULL
+ || key->e == NULL || key->d == NULL) {
+ RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_VALUE_MISSING);
+ 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) {
+ ret = -1;
+ RSAerr(RSA_F_RSA_CHECK_KEY_EX, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (BN_is_one(key->e)) {
+ ret = 0;
+ RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_BAD_E_VALUE);
+ }
+ if (!BN_is_odd(key->e)) {
+ ret = 0;
+ RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_BAD_E_VALUE);
+ }
+
+ /* p prime? */
+ if (BN_is_prime_ex(key->p, BN_prime_checks, NULL, cb) != 1) {
+ ret = 0;
+ RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_P_NOT_PRIME);
+ }
+
+ /* q prime? */
+ if (BN_is_prime_ex(key->q, BN_prime_checks, NULL, cb) != 1) {
+ ret = 0;
+ RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_Q_NOT_PRIME);
+ }
+
+ /* n = p*q? */
+ if (!BN_mul(i, key->p, key->q, 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);
+ }
+
+ /* d*e = 1 mod lcm(p-1,q-1)? */
+ if (!BN_sub(i, key->p, BN_value_one())) {
+ ret = -1;
+ goto err;
+ }
+ if (!BN_sub(j, key->q, BN_value_one())) {
+ ret = -1;
+ goto err;
+ }
+
+ /* now compute k = lcm(i,j) */
+ if (!BN_mul(l, i, j, ctx)) {
+ ret = -1;
+ goto err;
+ }
+ if (!BN_gcd(m, i, j, ctx)) {
+ ret = -1;
+ goto err;
+ }
+ if (!BN_div(k, NULL, l, m, ctx)) { /* remainder is 0 */
+ ret = -1;
+ goto err;
+ }
+ 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);
+ }
+
+ if (key->dmp1 != NULL && key->dmq1 != NULL && key->iqmp != NULL) {
+ /* dmp1 = d mod (p-1)? */
+ if (!BN_sub(i, key->p, BN_value_one())) {
+ ret = -1;
+ goto err;
+ }
+ 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);
+ }
+
+ /* dmq1 = d mod (q-1)? */
+ if (!BN_sub(i, key->q, BN_value_one())) {
+ ret = -1;
+ goto err;
+ }
+ 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);
+ }
+
+ /* iqmp = q^-1 mod p? */
+ if (!BN_mod_inverse(i, key->q, key->p, ctx)) {
+ 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);
+ }
+ }
+