summaryrefslogtreecommitdiff
path: root/thirdparty/openssl/crypto/rsa/rsa_gen.c
diff options
context:
space:
mode:
Diffstat (limited to 'thirdparty/openssl/crypto/rsa/rsa_gen.c')
-rw-r--r--thirdparty/openssl/crypto/rsa/rsa_gen.c250
1 files changed, 250 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/rsa/rsa_gen.c b/thirdparty/openssl/crypto/rsa/rsa_gen.c
new file mode 100644
index 0000000000..7f7dca39fd
--- /dev/null
+++ b/thirdparty/openssl/crypto/rsa/rsa_gen.c
@@ -0,0 +1,250 @@
+/* crypto/rsa/rsa_gen.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * 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 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 acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+/*
+ * NB: these functions have been "upgraded", the deprecated versions (which
+ * are compatibility wrappers using these functions) are in rsa_depr.c. -
+ * Geoff
+ */
+
+#include <stdio.h>
+#include <time.h>
+#include "cryptlib.h"
+#include <openssl/bn.h>
+#include <openssl/rsa.h>
+#ifdef OPENSSL_FIPS
+# include <openssl/fips.h>
+extern int FIPS_rsa_x931_generate_key_ex(RSA *rsa, int bits, BIGNUM *e,
+ BN_GENCB *cb);
+#endif
+
+static int rsa_builtin_keygen(RSA *rsa, int bits, BIGNUM *e_value,
+ BN_GENCB *cb);
+
+/*
+ * NB: this wrapper would normally be placed in rsa_lib.c and the static
+ * implementation would probably be in rsa_eay.c. Nonetheless, is kept here
+ * so that we don't introduce a new linker dependency. Eg. any application
+ * that wasn't previously linking object code related to key-generation won't
+ * have to now just because key-generation is part of RSA_METHOD.
+ */
+int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e_value, BN_GENCB *cb)
+{
+#ifdef OPENSSL_FIPS
+ if (FIPS_mode() && !(rsa->meth->flags & RSA_FLAG_FIPS_METHOD)
+ && !(rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)) {
+ RSAerr(RSA_F_RSA_GENERATE_KEY_EX, RSA_R_NON_FIPS_RSA_METHOD);
+ return 0;
+ }
+#endif
+ if (rsa->meth->rsa_keygen)
+ return rsa->meth->rsa_keygen(rsa, bits, e_value, cb);
+#ifdef OPENSSL_FIPS
+ if (FIPS_mode())
+ return FIPS_rsa_x931_generate_key_ex(rsa, bits, e_value, cb);
+#endif
+ return rsa_builtin_keygen(rsa, bits, e_value, cb);
+}
+
+static int rsa_builtin_keygen(RSA *rsa, int bits, BIGNUM *e_value,
+ BN_GENCB *cb)
+{
+ BIGNUM *r0 = NULL, *r1 = NULL, *r2 = NULL, *r3 = NULL, *tmp;
+ BIGNUM local_r0, local_d, local_p;
+ BIGNUM *pr0, *d, *p;
+ int bitsp, bitsq, ok = -1, n = 0;
+ BN_CTX *ctx = NULL;
+
+ ctx = BN_CTX_new();
+ if (ctx == NULL)
+ goto err;
+ BN_CTX_start(ctx);
+ r0 = BN_CTX_get(ctx);
+ r1 = BN_CTX_get(ctx);
+ r2 = BN_CTX_get(ctx);
+ r3 = BN_CTX_get(ctx);
+ if (r3 == NULL)
+ goto err;
+
+ bitsp = (bits + 1) / 2;
+ bitsq = bits - bitsp;
+
+ /* We need the RSA components non-NULL */
+ if (!rsa->n && ((rsa->n = BN_new()) == NULL))
+ goto err;
+ if (!rsa->d && ((rsa->d = BN_new()) == NULL))
+ goto err;
+ if (!rsa->e && ((rsa->e = BN_new()) == NULL))
+ goto err;
+ if (!rsa->p && ((rsa->p = BN_new()) == NULL))
+ goto err;
+ if (!rsa->q && ((rsa->q = BN_new()) == NULL))
+ goto err;
+ if (!rsa->dmp1 && ((rsa->dmp1 = BN_new()) == NULL))
+ goto err;
+ if (!rsa->dmq1 && ((rsa->dmq1 = BN_new()) == NULL))
+ goto err;
+ if (!rsa->iqmp && ((rsa->iqmp = BN_new()) == NULL))
+ goto err;
+
+ BN_copy(rsa->e, e_value);
+
+ /* generate p and q */
+ for (;;) {
+ if (!BN_generate_prime_ex(rsa->p, bitsp, 0, NULL, NULL, cb))
+ goto err;
+ if (!BN_sub(r2, rsa->p, BN_value_one()))
+ goto err;
+ if (!BN_gcd(r1, r2, rsa->e, ctx))
+ goto err;
+ if (BN_is_one(r1))
+ break;
+ if (!BN_GENCB_call(cb, 2, n++))
+ goto err;
+ }
+ if (!BN_GENCB_call(cb, 3, 0))
+ goto err;
+ for (;;) {
+ /*
+ * When generating ridiculously small keys, we can get stuck
+ * continually regenerating the same prime values. Check for this and
+ * bail if it happens 3 times.
+ */
+ unsigned int degenerate = 0;
+ do {
+ if (!BN_generate_prime_ex(rsa->q, bitsq, 0, NULL, NULL, cb))
+ goto err;
+ } while ((BN_cmp(rsa->p, rsa->q) == 0) && (++degenerate < 3));
+ if (degenerate == 3) {
+ ok = 0; /* we set our own err */
+ RSAerr(RSA_F_RSA_BUILTIN_KEYGEN, RSA_R_KEY_SIZE_TOO_SMALL);
+ goto err;
+ }
+ if (!BN_sub(r2, rsa->q, BN_value_one()))
+ goto err;
+ if (!BN_gcd(r1, r2, rsa->e, ctx))
+ goto err;
+ if (BN_is_one(r1))
+ break;
+ if (!BN_GENCB_call(cb, 2, n++))
+ goto err;
+ }
+ if (!BN_GENCB_call(cb, 3, 1))
+ goto err;
+ if (BN_cmp(rsa->p, rsa->q) < 0) {
+ tmp = rsa->p;
+ rsa->p = rsa->q;
+ rsa->q = tmp;
+ }
+
+ /* calculate n */
+ if (!BN_mul(rsa->n, rsa->p, rsa->q, ctx))
+ goto err;
+
+ /* calculate d */
+ if (!BN_sub(r1, rsa->p, BN_value_one()))
+ goto err; /* p-1 */
+ if (!BN_sub(r2, rsa->q, BN_value_one()))
+ goto err; /* q-1 */
+ if (!BN_mul(r0, r1, r2, ctx))
+ goto err; /* (p-1)(q-1) */
+ if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {
+ pr0 = &local_r0;
+ BN_with_flags(pr0, r0, BN_FLG_CONSTTIME);
+ } else
+ pr0 = r0;
+ if (!BN_mod_inverse(rsa->d, rsa->e, pr0, ctx))
+ goto err; /* d */
+
+ /* set up d for correct BN_FLG_CONSTTIME flag */
+ if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {
+ d = &local_d;
+ BN_with_flags(d, rsa->d, BN_FLG_CONSTTIME);
+ } else
+ d = rsa->d;
+
+ /* calculate d mod (p-1) */
+ if (!BN_mod(rsa->dmp1, d, r1, ctx))
+ goto err;
+
+ /* calculate d mod (q-1) */
+ if (!BN_mod(rsa->dmq1, d, r2, ctx))
+ goto err;
+
+ /* calculate inverse of q mod p */
+ if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {
+ p = &local_p;
+ BN_with_flags(p, rsa->p, BN_FLG_CONSTTIME);
+ } else
+ p = rsa->p;
+ if (!BN_mod_inverse(rsa->iqmp, rsa->q, p, ctx))
+ goto err;
+
+ ok = 1;
+ err:
+ if (ok == -1) {
+ RSAerr(RSA_F_RSA_BUILTIN_KEYGEN, ERR_LIB_BN);
+ ok = 0;
+ }
+ if (ctx != NULL) {
+ BN_CTX_end(ctx);
+ BN_CTX_free(ctx);
+ }
+
+ return ok;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 04:43:56 +0000