1 /* ====================================================================
2 * Copyright (c) 2011 The OpenSSL Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
16 * 3. All advertising materials mentioning features or use of this
17 * software must display the following acknowledgment:
18 * "This product includes software developed by the OpenSSL Project
19 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 * endorse or promote products derived from this software without
23 * prior written permission. For written permission, please contact
24 * openssl-core@openssl.org.
26 * 5. Products derived from this software may not be called "OpenSSL"
27 * nor may "OpenSSL" appear in their names without prior written
28 * permission of the OpenSSL Project.
30 * 6. Redistributions of any form whatsoever must retain the following
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 #define OPENSSL_FIPSAPI
52 #include <openssl/crypto.h>
53 #include <openssl/rand.h>
54 #include <openssl/err.h>
55 #include <openssl/fips.h>
56 #include <openssl/fips_rand.h>
59 /* FIPS API for PRNG use. Similar to RAND functionality but without
60 * ENGINE and additional checking for non-FIPS rand methods.
63 static const RAND_METHOD *fips_rand_meth = NULL;
64 static int fips_approved_rand_meth = 0;
66 int FIPS_rand_set_method(const RAND_METHOD *meth)
68 if (meth == FIPS_drbg_method())
69 fips_approved_rand_meth = 1;
70 else if (meth == FIPS_x931_method())
71 fips_approved_rand_meth = 2;
73 fips_approved_rand_meth = 0;
75 if (!fips_approved_rand_meth && FIPS_mode())
77 FIPSerr(FIPS_F_FIPS_RAND_SET_METHOD, FIPS_R_NON_FIPS_METHOD);
80 fips_rand_meth = meth;
84 void FIPS_rand_seed(const void *buf, int num)
86 if (!fips_approved_rand_meth && FIPS_mode())
88 FIPSerr(FIPS_F_FIPS_RAND_SEED, FIPS_R_NON_FIPS_METHOD);
91 if (fips_rand_meth && fips_rand_meth->seed)
92 fips_rand_meth->seed(buf,num);
95 void FIPS_rand_add(const void *buf, int num, double entropy)
97 if (!fips_approved_rand_meth && FIPS_mode())
99 FIPSerr(FIPS_F_FIPS_RAND_ADD, FIPS_R_NON_FIPS_METHOD);
102 if (fips_rand_meth && fips_rand_meth->add)
103 fips_rand_meth->add(buf,num,entropy);
106 int FIPS_rand_bytes(unsigned char *buf, int num)
108 if (!fips_approved_rand_meth && FIPS_mode())
110 FIPSerr(FIPS_F_FIPS_RAND_BYTES, FIPS_R_NON_FIPS_METHOD);
113 if (fips_rand_meth && fips_rand_meth->bytes)
114 return fips_rand_meth->bytes(buf,num);
118 int FIPS_rand_pseudo_bytes(unsigned char *buf, int num)
120 if (!fips_approved_rand_meth && FIPS_mode())
122 FIPSerr(FIPS_F_FIPS_RAND_PSEUDO_BYTES, FIPS_R_NON_FIPS_METHOD);
125 if (fips_rand_meth && fips_rand_meth->pseudorand)
126 return fips_rand_meth->pseudorand(buf,num);
130 int FIPS_rand_status(void)
132 if (!fips_approved_rand_meth && FIPS_mode())
134 FIPSerr(FIPS_F_FIPS_RAND_STATUS, FIPS_R_NON_FIPS_METHOD);
137 if (fips_rand_meth && fips_rand_meth->status)
138 return fips_rand_meth->status();
142 /* Return instantiated strength of PRNG. For DRBG this is an internal
143 * parameter. For X9.31 PRNG it is 80 bits (from SP800-131). Any other
144 * type of PRNG is not approved and returns 0 in FIPS mode and maximum
145 * 256 outside FIPS mode.
148 int FIPS_rand_strength(void)
150 if (fips_approved_rand_meth == 1)
151 return FIPS_drbg_get_strength(FIPS_get_default_drbg());
152 else if (fips_approved_rand_meth == 2)
154 else if (fips_approved_rand_meth == 0)