summaryrefslogtreecommitdiff
path: root/src/lib/libcrypto/rsa/rsa_gen.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/lib/libcrypto/rsa/rsa_gen.c')
-rw-r--r--src/lib/libcrypto/rsa/rsa_gen.c219
1 files changed, 0 insertions, 219 deletions
diff --git a/src/lib/libcrypto/rsa/rsa_gen.c b/src/lib/libcrypto/rsa/rsa_gen.c
deleted file mode 100644
index 767f7ab682..0000000000
--- a/src/lib/libcrypto/rsa/rsa_gen.c
+++ /dev/null
@@ -1,219 +0,0 @@
1/* crypto/rsa/rsa_gen.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59
60/* NB: these functions have been "upgraded", the deprecated versions (which are
61 * compatibility wrappers using these functions) are in rsa_depr.c.
62 * - Geoff
63 */
64
65#include <stdio.h>
66#include <time.h>
67#include "cryptlib.h"
68#include <openssl/bn.h>
69#include <openssl/rsa.h>
70
71static int rsa_builtin_keygen(RSA *rsa, int bits, BIGNUM *e_value, BN_GENCB *cb);
72
73/* NB: this wrapper would normally be placed in rsa_lib.c and the static
74 * implementation would probably be in rsa_eay.c. Nonetheless, is kept here so
75 * that we don't introduce a new linker dependency. Eg. any application that
76 * wasn't previously linking object code related to key-generation won't have to
77 * now just because key-generation is part of RSA_METHOD. */
78int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e_value, BN_GENCB *cb)
79 {
80 if(rsa->meth->rsa_keygen)
81 return rsa->meth->rsa_keygen(rsa, bits, e_value, cb);
82 return rsa_builtin_keygen(rsa, bits, e_value, cb);
83 }
84
85static int rsa_builtin_keygen(RSA *rsa, int bits, BIGNUM *e_value, BN_GENCB *cb)
86 {
87 BIGNUM *r0=NULL,*r1=NULL,*r2=NULL,*r3=NULL,*tmp;
88 BIGNUM local_r0,local_d,local_p;
89 BIGNUM *pr0,*d,*p;
90 int bitsp,bitsq,ok= -1,n=0;
91 BN_CTX *ctx=NULL;
92
93 ctx=BN_CTX_new();
94 if (ctx == NULL) goto err;
95 BN_CTX_start(ctx);
96 r0 = BN_CTX_get(ctx);
97 r1 = BN_CTX_get(ctx);
98 r2 = BN_CTX_get(ctx);
99 r3 = BN_CTX_get(ctx);
100 if (r3 == NULL) goto err;
101
102 bitsp=(bits+1)/2;
103 bitsq=bits-bitsp;
104
105 /* We need the RSA components non-NULL */
106 if(!rsa->n && ((rsa->n=BN_new()) == NULL)) goto err;
107 if(!rsa->d && ((rsa->d=BN_new()) == NULL)) goto err;
108 if(!rsa->e && ((rsa->e=BN_new()) == NULL)) goto err;
109 if(!rsa->p && ((rsa->p=BN_new()) == NULL)) goto err;
110 if(!rsa->q && ((rsa->q=BN_new()) == NULL)) goto err;
111 if(!rsa->dmp1 && ((rsa->dmp1=BN_new()) == NULL)) goto err;
112 if(!rsa->dmq1 && ((rsa->dmq1=BN_new()) == NULL)) goto err;
113 if(!rsa->iqmp && ((rsa->iqmp=BN_new()) == NULL)) goto err;
114
115 BN_copy(rsa->e, e_value);
116
117 /* generate p and q */
118 for (;;)
119 {
120 if(!BN_generate_prime_ex(rsa->p, bitsp, 0, NULL, NULL, cb))
121 goto err;
122 if (!BN_sub(r2,rsa->p,BN_value_one())) goto err;
123 if (!BN_gcd(r1,r2,rsa->e,ctx)) goto err;
124 if (BN_is_one(r1)) break;
125 if(!BN_GENCB_call(cb, 2, n++))
126 goto err;
127 }
128 if(!BN_GENCB_call(cb, 3, 0))
129 goto err;
130 for (;;)
131 {
132 /* When generating ridiculously small keys, we can get stuck
133 * continually regenerating the same prime values. Check for
134 * this and bail if it happens 3 times. */
135 unsigned int degenerate = 0;
136 do
137 {
138 if(!BN_generate_prime_ex(rsa->q, bitsq, 0, NULL, NULL, cb))
139 goto err;
140 } while((BN_cmp(rsa->p, rsa->q) == 0) && (++degenerate < 3));
141 if(degenerate == 3)
142 {
143 ok = 0; /* we set our own err */
144 RSAerr(RSA_F_RSA_BUILTIN_KEYGEN,RSA_R_KEY_SIZE_TOO_SMALL);
145 goto err;
146 }
147 if (!BN_sub(r2,rsa->q,BN_value_one())) goto err;
148 if (!BN_gcd(r1,r2,rsa->e,ctx)) goto err;
149 if (BN_is_one(r1))
150 break;
151 if(!BN_GENCB_call(cb, 2, n++))
152 goto err;
153 }
154 if(!BN_GENCB_call(cb, 3, 1))
155 goto err;
156 if (BN_cmp(rsa->p,rsa->q) < 0)
157 {
158 tmp=rsa->p;
159 rsa->p=rsa->q;
160 rsa->q=tmp;
161 }
162
163 /* calculate n */
164 if (!BN_mul(rsa->n,rsa->p,rsa->q,ctx)) goto err;
165
166 /* calculate d */
167 if (!BN_sub(r1,rsa->p,BN_value_one())) goto err; /* p-1 */
168 if (!BN_sub(r2,rsa->q,BN_value_one())) goto err; /* q-1 */
169 if (!BN_mul(r0,r1,r2,ctx)) goto err; /* (p-1)(q-1) */
170 if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME))
171 {
172 pr0 = &local_r0;
173 BN_with_flags(pr0, r0, BN_FLG_CONSTTIME);
174 }
175 else
176 pr0 = r0;
177 if (!BN_mod_inverse(rsa->d,rsa->e,pr0,ctx)) goto err; /* d */
178
179 /* set up d for correct BN_FLG_CONSTTIME flag */
180 if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME))
181 {
182 d = &local_d;
183 BN_with_flags(d, rsa->d, BN_FLG_CONSTTIME);
184 }
185 else
186 d = rsa->d;
187
188 /* calculate d mod (p-1) */
189 if (!BN_mod(rsa->dmp1,d,r1,ctx)) goto err;
190
191 /* calculate d mod (q-1) */
192 if (!BN_mod(rsa->dmq1,d,r2,ctx)) goto err;
193
194 /* calculate inverse of q mod p */
195 if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME))
196 {
197 p = &local_p;
198 BN_with_flags(p, rsa->p, BN_FLG_CONSTTIME);
199 }
200 else
201 p = rsa->p;
202 if (!BN_mod_inverse(rsa->iqmp,rsa->q,p,ctx)) goto err;
203
204 ok=1;
205err:
206 if (ok == -1)
207 {
208 RSAerr(RSA_F_RSA_BUILTIN_KEYGEN,ERR_LIB_BN);
209 ok=0;
210 }
211 if (ctx != NULL)
212 {
213 BN_CTX_end(ctx);
214 BN_CTX_free(ctx);
215 }
216
217 return ok;
218 }
219
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-03-21 17:41:28 +0000