--- /dev/null
+/* crypto/rsa/rsa_chk.c -*- Mode: C; c-file-style: "eay" -*- */
+/* ====================================================================
+ * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * 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
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ */
+
+#include <openssl/bn.h>
+#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);
+ }
+ }
+
+ 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);
+ }
projects / cassiopeia.git / blobdiff