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diff --git a/src/lib/libcrypto/rsa/rsa_chk.c b/src/lib/libcrypto/rsa/rsa_chk.c
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1/* crypto/rsa/rsa_chk.c -*- Mode: C; c-file-style: "eay" -*- */
2/* ====================================================================
3 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 *
17 * 3. All advertising materials mentioning features or use of this
18 * software must display the following acknowledgment:
19 * "This product includes software developed by the OpenSSL Project
20 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
21 *
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 * endorse or promote products derived from this software without
24 * prior written permission. For written permission, please contact
25 * openssl-core@OpenSSL.org.
26 *
27 * 5. Products derived from this software may not be called "OpenSSL"
28 * nor may "OpenSSL" appear in their names without prior written
29 * permission of the OpenSSL Project.
30 *
31 * 6. Redistributions of any form whatsoever must retain the following
32 * acknowledgment:
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 */
50
51#include <openssl/bn.h>
52#include <openssl/err.h>
53#include <openssl/rsa.h>
54
55
56int RSA_check_key(const RSA *key)
57 {
58 BIGNUM *i, *j, *k, *l, *m;
59 BN_CTX *ctx;
60 int r;
61 int ret=1;
62
63 i = BN_new();
64 j = BN_new();
65 k = BN_new();
66 l = BN_new();
67 m = BN_new();
68 ctx = BN_CTX_new();
69 if (i == NULL || j == NULL || k == NULL || l == NULL ||
70 m == NULL || ctx == NULL)
71 {
72 ret = -1;
73 RSAerr(RSA_F_RSA_CHECK_KEY, ERR_R_MALLOC_FAILURE);
74 goto err;
75 }
76
77 /* p prime? */
78 r = BN_is_prime_ex(key->p, BN_prime_checks, NULL, NULL);
79 if (r != 1)
80 {
81 ret = r;
82 if (r != 0)
83 goto err;
84 RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_P_NOT_PRIME);
85 }
86
87 /* q prime? */
88 r = BN_is_prime_ex(key->q, BN_prime_checks, NULL, NULL);
89 if (r != 1)
90 {
91 ret = r;
92 if (r != 0)
93 goto err;
94 RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_Q_NOT_PRIME);
95 }
96
97 /* n = p*q? */
98 r = BN_mul(i, key->p, key->q, ctx);
99 if (!r) { ret = -1; goto err; }
100
101 if (BN_cmp(i, key->n) != 0)
102 {
103 ret = 0;
104 RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_N_DOES_NOT_EQUAL_P_Q);
105 }
106
107 /* d*e = 1 mod lcm(p-1,q-1)? */
108
109 r = BN_sub(i, key->p, BN_value_one());
110 if (!r) { ret = -1; goto err; }
111 r = BN_sub(j, key->q, BN_value_one());
112 if (!r) { ret = -1; goto err; }
113
114 /* now compute k = lcm(i,j) */
115 r = BN_mul(l, i, j, ctx);
116 if (!r) { ret = -1; goto err; }
117 r = BN_gcd(m, i, j, ctx);
118 if (!r) { ret = -1; goto err; }
119 r = BN_div(k, NULL, l, m, ctx); /* remainder is 0 */
120 if (!r) { ret = -1; goto err; }
121
122 r = BN_mod_mul(i, key->d, key->e, k, ctx);
123 if (!r) { ret = -1; goto err; }
124
125 if (!BN_is_one(i))
126 {
127 ret = 0;
128 RSAerr(RSA_F_RSA_CHECK_KEY, RSA_R_D_E_NOT_CONGRUENT_TO_1);
129 }
130
131 if (key->dmp1 != NULL && key->dmq1 != NULL && key->iqmp != NULL)
132 {
133 /* dmp1 = d mod (p-1)? */
134 r = BN_sub(i, key->p, BN_value_one());
135 if (!r) { ret = -1; goto err; }
136
137 r = BN_mod(j, key->d, i, ctx);
138 if (!r) { ret = -1; goto err; }
139
140 if (BN_cmp(j, key->dmp1) != 0)
141 {
142 ret = 0;
143 RSAerr(RSA_F_RSA_CHECK_KEY,
144 RSA_R_DMP1_NOT_CONGRUENT_TO_D);
145 }
146
147 /* dmq1 = d mod (q-1)? */
148 r = BN_sub(i, key->q, BN_value_one());
149 if (!r) { ret = -1; goto err; }
150
151 r = BN_mod(j, key->d, i, ctx);
152 if (!r) { ret = -1; goto err; }
153
154 if (BN_cmp(j, key->dmq1) != 0)
155 {
156 ret = 0;
157 RSAerr(RSA_F_RSA_CHECK_KEY,
158 RSA_R_DMQ1_NOT_CONGRUENT_TO_D);
159 }
160
161 /* iqmp = q^-1 mod p? */
162 if(!BN_mod_inverse(i, key->q, key->p, ctx))
163 {
164 ret = -1;
165 goto err;
166 }
167
168 if (BN_cmp(i, key->iqmp) != 0)
169 {
170 ret = 0;
171 RSAerr(RSA_F_RSA_CHECK_KEY,
172 RSA_R_IQMP_NOT_INVERSE_OF_Q);
173 }
174 }
175
176 err:
177 if (i != NULL) BN_free(i);
178 if (j != NULL) BN_free(j);
179 if (k != NULL) BN_free(k);
180 if (l != NULL) BN_free(l);
181 if (m != NULL) BN_free(m);
182 if (ctx != NULL) BN_CTX_free(ctx);
183 return (ret);
184 }
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