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Diffstat (limited to 'crypto/rsa/rsa_chk.c')
-rw-r--r--crypto/rsa/rsa_chk.c292
1 files changed, 158 insertions, 134 deletions
diff --git a/crypto/rsa/rsa_chk.c b/crypto/rsa/rsa_chk.c
index cc30e77132fa..f4383860b58b 100644
--- a/crypto/rsa/rsa_chk.c
+++ b/crypto/rsa/rsa_chk.c
@@ -7,7 +7,7 @@
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
@@ -52,139 +52,163 @@
#include <openssl/err.h>
#include <openssl/rsa.h>
-
int RSA_check_key(const RSA *key)
- {
- BIGNUM *i, *j, *k, *l, *m;
- BN_CTX *ctx;
- int r;
- int ret=1;
-
- if (!key->p || !key->q || !key->n || !key->e || !key->d)
- {
- RSAerr(RSA_F_RSA_CHECK_KEY, 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, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- /* p prime? */
- r = BN_is_prime_ex(key->p, BN_prime_checks, NULL, NULL);
- if (r != 1)
- {
- ret = r;
- if (r != 0)
- goto err;
- RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_P_NOT_PRIME);
- }
-
- /* q prime? */
- r = BN_is_prime_ex(key->q, BN_prime_checks, NULL, NULL);
- if (r != 1)
- {
- ret = r;
- if (r != 0)
- goto err;
- RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_Q_NOT_PRIME);
- }
-
- /* n = p*q? */
- r = BN_mul(i, key->p, key->q, ctx);
- if (!r) { ret = -1; goto err; }
-
- if (BN_cmp(i, key->n) != 0)
- {
- ret = 0;
- RSAerr(RSA_F_RSA_CHECK_KEY, 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) { 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;
- RSAerr(RSA_F_RSA_CHECK_KEY, 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) { 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);
- }
-
- /* dmq1 = d mod (q-1)? */
- r = BN_sub(i, key->q, 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->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;
- }
-
- if (BN_cmp(i, key->iqmp) != 0)
- {
- ret = 0;
- RSAerr(RSA_F_RSA_CHECK_KEY,
- RSA_R_IQMP_NOT_INVERSE_OF_Q);
- }
- }
+{
+ BIGNUM *i, *j, *k, *l, *m;
+ BN_CTX *ctx;
+ int r;
+ int ret = 1;
+
+ if (!key->p || !key->q || !key->n || !key->e || !key->d) {
+ RSAerr(RSA_F_RSA_CHECK_KEY, 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, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /* p prime? */
+ r = BN_is_prime_ex(key->p, BN_prime_checks, NULL, NULL);
+ if (r != 1) {
+ ret = r;
+ if (r != 0)
+ goto err;
+ RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_P_NOT_PRIME);
+ }
+
+ /* q prime? */
+ r = BN_is_prime_ex(key->q, BN_prime_checks, NULL, NULL);
+ if (r != 1) {
+ ret = r;
+ if (r != 0)
+ goto err;
+ RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_Q_NOT_PRIME);
+ }
+
+ /* n = p*q? */
+ r = BN_mul(i, key->p, key->q, ctx);
+ if (!r) {
+ ret = -1;
+ goto err;
+ }
+
+ if (BN_cmp(i, key->n) != 0) {
+ ret = 0;
+ RSAerr(RSA_F_RSA_CHECK_KEY, 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) {
+ 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;
+ RSAerr(RSA_F_RSA_CHECK_KEY, 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) {
+ 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);
+ }
+
+ /* dmq1 = d mod (q-1)? */
+ r = BN_sub(i, key->q, 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->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;
+ }
+
+ 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);
- if (k != NULL) BN_free(k);
- if (l != NULL) BN_free(l);
- if (m != NULL) BN_free(m);
- if (ctx != NULL) BN_CTX_free(ctx);
- return (ret);
- }
+ if (i != NULL)
+ BN_free(i);
+ if (j != NULL)
+ BN_free(j);
+ if (k != NULL)
+ BN_free(k);
+ if (l != NULL)
+ BN_free(l);
+ if (m != NULL)
+ BN_free(m);
+ if (ctx != NULL)
+ BN_CTX_free(ctx);
+ return (ret);
+}