1 files changed, 282 insertions, 0 deletions

diff --git a/src/lib/libcrypto/bn/bn_x931p.c b/src/lib/libcrypto/bn/bn_x931p.c
new file mode 100644
index 0000000000..c64410dd3a
--- /dev/null
+++ b/src/lib/libcrypto/bn/bn_x931p.c
@@ -0,0 +1,282 @@
+/* bn_x931p.c */
+/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+ * project 2005.
+ */
+/* ====================================================================
+ * Copyright (c) 2005 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
+ *    licensing@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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include <openssl/bn.h>
+
+#ifdef OPENSSL_FIPS
+
+/* X9.31 routines for prime derivation */
+
+
+/* X9.31 prime derivation. This is used to generate the primes pi
+ * (p1, p2, q1, q2) from a parameter Xpi by checking successive odd
+ * integers.
+ */
+
+static int bn_x931_derive_pi(BIGNUM *pi, const BIGNUM *Xpi, BN_CTX *ctx,
+                        void (*cb)(int, int, void *), void *cb_arg)
+        {
+        int i = 0;
+        if (!BN_copy(pi, Xpi))
+                return 0;
+        if (!BN_is_odd(pi) && !BN_add_word(pi, 1))
+                return 0;
+        for(;;)
+                {
+                i++;
+                if (cb)
+                        cb(0, i, cb_arg);
+                /* NB 27 MR is specificed in X9.31 */
+                if (BN_is_prime_fasttest(pi, 27, cb, ctx, cb_arg, 1))
+                        break;
+                if (!BN_add_word(pi, 2))
+                        return 0;
+                }
+        if (cb)
+                cb(2, i, cb_arg);
+        return 1;
+        }
+
+/* This is the main X9.31 prime derivation function. From parameters
+ * Xp1, Xp2 and Xp derive the prime p. If the parameters p1 or p2 are
+ * not NULL they will be returned too: this is needed for testing.
+ */
+
+int BN_X931_derive_prime(BIGNUM *p, BIGNUM *p1, BIGNUM *p2,
+                        void (*cb)(int, int, void *), void *cb_arg,
+                        const BIGNUM *Xp, const BIGNUM *Xp1, const BIGNUM *Xp2,
+                        const BIGNUM *e, BN_CTX *ctx)
+        {
+        int ret = 0;
+
+        BIGNUM *t, *p1p2, *pm1;
+
+        /* Only even e supported */
+        if (!BN_is_odd(e))
+                return 0;
+
+        BN_CTX_start(ctx);
+        if (!p1)
+                p1 = BN_CTX_get(ctx);
+
+        if (!p2)
+                p2 = BN_CTX_get(ctx);
+
+        t = BN_CTX_get(ctx);
+
+        p1p2 = BN_CTX_get(ctx);
+
+        pm1 = BN_CTX_get(ctx);
+
+        if (!bn_x931_derive_pi(p1, Xp1, ctx, cb, cb_arg))
+                goto err;
+
+        if (!bn_x931_derive_pi(p2, Xp2, ctx, cb, cb_arg))
+                goto err;
+
+        if (!BN_mul(p1p2, p1, p2, ctx))
+                goto err;
+
+        /* First set p to value of Rp */
+
+        if (!BN_mod_inverse(p, p2, p1, ctx))
+                goto err;
+
+        if (!BN_mul(p, p, p2, ctx))
+                goto err;
+
+        if (!BN_mod_inverse(t, p1, p2, ctx))
+                goto err;
+
+        if (!BN_mul(t, t, p1, ctx))
+                goto err;
+
+        if (!BN_sub(p, p, t))
+                goto err;
+
+        if (p->neg && !BN_add(p, p, p1p2))
+                goto err;
+
+        /* p now equals Rp */
+
+        if (!BN_mod_sub(p, p, Xp, p1p2, ctx))
+                goto err;
+
+        if (!BN_add(p, p, Xp))
+                goto err;
+
+        /* p now equals Yp0 */
+
+        for (;;)
+                {
+                int i = 1;
+                if (cb)
+                        cb(0, i++, cb_arg);
+                if (!BN_copy(pm1, p))
+                        goto err;
+                if (!BN_sub_word(pm1, 1))
+                        goto err;
+                if (!BN_gcd(t, pm1, e, ctx))
+                        goto err;
+                if (BN_is_one(t)
+                /* X9.31 specifies 8 MR and 1 Lucas test or any prime test
+                 * offering similar or better guarantees 50 MR is considerably 
+                 * better.
+                 */
+                        && BN_is_prime_fasttest(p, 50, cb, ctx, cb_arg, 1))
+                        break;
+                if (!BN_add(p, p, p1p2))
+                        goto err;
+                }
+
+        if (cb)
+                cb(3, 0, cb_arg);
+
+        ret = 1;
+
+        err:
+
+        BN_CTX_end(ctx);
+
+        return ret;
+        }
+
+/* Generate pair of paramters Xp, Xq for X9.31 prime generation.
+ * Note: nbits paramter is sum of number of bits in both.
+ */
+
+int BN_X931_generate_Xpq(BIGNUM *Xp, BIGNUM *Xq, int nbits, BN_CTX *ctx)
+        {
+        BIGNUM *t;
+        int i;
+        /* Number of bits for each prime is of the form
+         * 512+128s for s = 0, 1, ...
+         */
+        if ((nbits < 1024) || (nbits & 0xff))
+                return 0;
+        nbits >>= 1;
+        /* The random value Xp must be between sqrt(2) * 2^(nbits-1) and
+         * 2^nbits - 1. By setting the top two bits we ensure that the lower
+         * bound is exceeded.
+         */
+        if (!BN_rand(Xp, nbits, 1, 0))
+                return 0;
+
+        BN_CTX_start(ctx);
+        t = BN_CTX_get(ctx);
+
+        for (i = 0; i < 1000; i++)
+                {
+                if (!BN_rand(Xq, nbits, 1, 0))
+                        return 0;
+                /* Check that |Xp - Xq| > 2^(nbits - 100) */
+                BN_sub(t, Xp, Xq);
+                if (BN_num_bits(t) > (nbits - 100))
+                        break;
+                }
+
+        BN_CTX_end(ctx);
+
+        if (i < 1000)
+                return 1;
+
+        return 0;
+
+        }
+
+/* Generate primes using X9.31 algorithm. Of the values p, p1, p2, Xp1
+ * and Xp2 only 'p' needs to be non-NULL. If any of the others are not NULL
+ * the relevant parameter will be stored in it.
+ *
+ * Due to the fact that |Xp - Xq| > 2^(nbits - 100) must be satisfied Xp and Xq
+ * are generated using the previous function and supplied as input.
+ */
+
+int BN_X931_generate_prime(BIGNUM *p, BIGNUM *p1, BIGNUM *p2,
+                        BIGNUM *Xp1, BIGNUM *Xp2,
+                        const BIGNUM *Xp,
+                        const BIGNUM *e, BN_CTX *ctx,
+                        void (*cb)(int, int, void *), void *cb_arg)
+        {
+        int ret = 0;
+
+        BN_CTX_start(ctx);
+        if (!Xp1)
+                Xp1 = BN_CTX_get(ctx);
+        if (!Xp2)
+                Xp2 = BN_CTX_get(ctx);
+
+        if (!BN_rand(Xp1, 101, 0, 0))
+                goto error;
+        if (!BN_rand(Xp2, 101, 0, 0))
+                goto error;
+        if (!BN_X931_derive_prime(p, p1, p2, cb, cb_arg,
+                                                Xp, Xp1, Xp2, e, ctx))
+                goto error;
+
+        ret = 1;
+
+        error:
+        BN_CTX_end(ctx);
+
+        return ret;
+
+        }
+
+#endif