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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/rsa/rsa_x931g.c
1 /* crypto/rsa/rsa_gen.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
64 #include <openssl/err.h>
65 #include <openssl/bn.h>
66 #include <openssl/rsa.h>
68 /* X9.31 RSA key derivation and generation */
70 int RSA_X931_derive_ex(RSA
*rsa
, BIGNUM
*p1
, BIGNUM
*p2
, BIGNUM
*q1
, BIGNUM
*q2
,
71 const BIGNUM
*Xp1
, const BIGNUM
*Xp2
, const BIGNUM
*Xp
,
72 const BIGNUM
*Xq1
, const BIGNUM
*Xq2
, const BIGNUM
*Xq
,
73 const BIGNUM
*e
, BN_GENCB
*cb
)
75 BIGNUM
*r0
=NULL
,*r1
=NULL
,*r2
=NULL
,*r3
=NULL
;
76 BN_CTX
*ctx
=NULL
,*ctx2
=NULL
;
102 /* If not all parameters present only calculate what we can.
103 * This allows test programs to output selective parameters.
112 if (!BN_X931_derive_prime_ex(rsa
->p
, p1
, p2
,
113 Xp
, Xp1
, Xp2
, e
, ctx
, cb
))
122 if (!BN_X931_derive_prime_ex(rsa
->q
, q1
, q2
,
123 Xq
, Xq1
, Xq2
, e
, ctx
, cb
))
127 if (!rsa
->p
|| !rsa
->q
)
134 /* Since both primes are set we can now calculate all remaining
142 if (!BN_mul(rsa
->n
,rsa
->p
,rsa
->q
,ctx
))
146 if (!BN_sub(r1
,rsa
->p
,BN_value_one()))
148 if (!BN_sub(r2
,rsa
->q
,BN_value_one()))
150 if (!BN_mul(r0
,r1
,r2
,ctx
))
151 goto err
; /* (p-1)(q-1) */
153 if (!BN_gcd(r3
, r1
, r2
, ctx
))
156 if (!BN_div(r0
, NULL
, r0
, r3
, ctx
))
157 goto err
; /* LCM((p-1)(q-1)) */
163 rsa
->d
=BN_mod_inverse(NULL
,rsa
->e
,r0
,ctx2
); /* d */
167 /* calculate d mod (p-1) */
169 if (rsa
->dmp1
== NULL
)
171 if (!BN_mod(rsa
->dmp1
,rsa
->d
,r1
,ctx
))
174 /* calculate d mod (q-1) */
176 if (rsa
->dmq1
== NULL
)
178 if (!BN_mod(rsa
->dmq1
,rsa
->d
,r2
,ctx
))
181 /* calculate inverse of q mod p */
182 rsa
->iqmp
=BN_mod_inverse(NULL
,rsa
->q
,rsa
->p
,ctx2
);
192 /* If this is set all calls successful */
193 if (rsa
->iqmp
!= NULL
)
200 int RSA_X931_generate_key_ex(RSA
*rsa
, int bits
, const BIGNUM
*e
, BN_GENCB
*cb
)
203 BIGNUM
*Xp
= NULL
, *Xq
= NULL
;
211 Xp
= BN_CTX_get(ctx
);
212 Xq
= BN_CTX_get(ctx
);
213 if (!BN_X931_generate_Xpq(Xp
, Xq
, bits
, ctx
))
218 if (!rsa
->p
|| !rsa
->q
)
221 /* Generate two primes from Xp, Xq */
223 if (!BN_X931_generate_prime_ex(rsa
->p
, NULL
, NULL
, NULL
, NULL
, Xp
,
227 if (!BN_X931_generate_prime_ex(rsa
->q
, NULL
, NULL
, NULL
, NULL
, Xq
,
231 /* Since rsa->p and rsa->q are valid this call will just derive
232 * remaining RSA components.
235 if (!RSA_X931_derive_ex(rsa
, NULL
, NULL
, NULL
, NULL
,
236 NULL
, NULL
, NULL
, NULL
, NULL
, NULL
, e
, cb
))