-/* crypto/rsa/rsa_chck.c -*- Mode: C; c-file-style: "eay" -*- */
+/* crypto/rsa/rsa_chk.c -*- Mode: C; c-file-style: "eay" -*- */
/* ====================================================================
* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
*
#include <openssl/rsa.h>
-int RSA_check_key(RSA *key)
+int RSA_check_key(const RSA *key)
{
BIGNUM *i, *j, *k, *l, *m;
BN_CTX *ctx;
+ int r;
int ret=1;
i = BN_new();
if (i == NULL || j == NULL || k == NULL || l == NULL ||
m == NULL || ctx == NULL)
{
+ ret = -1;
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)
+ r = BN_is_prime_ex(key->p, BN_prime_checks, NULL, NULL);
+ if (r != 1)
{
- ret = 0;
- if (ERR_GET_REASON(ERR_peek_error()) == ERR_R_MALLOC_FAILURE)
+ ret = r;
+ if (r != 0)
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)
+ r = BN_is_prime_ex(key->q, BN_prime_checks, NULL, NULL);
+ if (r != 1)
{
- ret = 0;
- if (ERR_GET_REASON(ERR_peek_error()) == ERR_R_MALLOC_FAILURE)
+ ret = r;
+ if (r != 0)
goto err;
RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_Q_NOT_PRIME);
}
/* n = p*q? */
- BN_mul(i, key->p, key->q, ctx);
+ r = BN_mul(i, key->p, key->q, ctx);
+ if (!r) { ret = -1; goto err; }
+
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);
+ RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_N_DOES_NOT_EQUAL_P_Q);
}
- /* 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)
+ /* d*e = 1 mod lcm(p-1,q-1)? */
+
+ r = BN_sub(i, key->p, BN_value_one());
+ if (!r) { ret = -1; goto err; }
+ r = BN_sub(j, key->q, BN_value_one());
+ if (!r) { ret = -1; goto err; }
+
+ /* now compute k = lcm(i,j) */
+ r = BN_mul(l, i, j, ctx);
+ if (!r) { ret = -1; goto err; }
+ r = BN_gcd(m, i, j, ctx);
+ if (!r) { ret = -1; goto err; }
+ r = BN_div(k, NULL, l, m, ctx); /* remainder is 0 */
+ if (!r) { ret = -1; goto err; }
+
+ r = BN_mod_mul(i, key->d, key->e, k, ctx);
+ if (!r) { ret = -1; goto err; }
+
+ 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_DMP1_NOT_CONGRUENT_TO_D);
+ RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_D_E_NOT_CONGRUENT_TO_1);
}
- /* 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)
+ if (key->dmp1 != NULL && key->dmq1 != NULL && key->iqmp != NULL)
{
- 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);
- }
+ /* dmp1 = d mod (p-1)? */
+ r = BN_sub(i, key->p, BN_value_one());
+ if (!r) { ret = -1; goto err; }
+
+ r = BN_mod(j, key->d, i, ctx);
+ if (!r) { ret = -1; goto err; }
+
+ if (BN_cmp(j, key->dmp1) != 0)
+ {
+ ret = 0;
+ RSAerr(RSA_F_RSA_CHECK_KEY,
+ RSA_R_DMP1_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);
- }
+ /* dmq1 = d mod (q-1)? */
+ r = BN_sub(i, key->q, BN_value_one());
+ if (!r) { ret = -1; goto err; }
- /* 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)
+ r = BN_mod(j, key->d, i, ctx);
+ if (!r) { ret = -1; goto err; }
+
+ if (BN_cmp(j, key->dmq1) != 0)
+ {
+ ret = 0;
+ RSAerr(RSA_F_RSA_CHECK_KEY,
+ 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;
- RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_DE_NOT_CONGRUENT_TO_1);
+ }
+
+ if (BN_cmp(i, key->iqmp) != 0)
+ {
+ ret = 0;
+ RSAerr(RSA_F_RSA_CHECK_KEY,
+ RSA_R_IQMP_NOT_INVERSE_OF_Q);
+ }
}
-
+
err:
if (i != NULL) BN_free(i);
if (j != NULL) BN_free(j);