1 /* ====================================================================
2 * Copyright (c) 2007 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)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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
53 * This is a FIPS approved AES PRNG based on ANSI X9.31 A.2.4.
55 #include <openssl/crypto.h>
58 /* If we don't define _XOPEN_SOURCE_EXTENDED, struct timeval won't
59 be defined and gettimeofday() won't be declared with strict compilers
60 like DEC C in ANSI C mode. */
61 #ifndef _XOPEN_SOURCE_EXTENDED
62 #define _XOPEN_SOURCE_EXTENDED 1
65 #include <openssl/rand.h>
66 #include <openssl/aes.h>
67 #include <openssl/err.h>
68 #include <openssl/fips_rand.h>
69 #if !(defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VXWORKS))
70 # include <sys/time.h>
72 #if defined(OPENSSL_SYS_VXWORKS)
76 #ifndef OPENSSL_SYS_WIN32
77 # ifdef OPENSSL_UNISTD
78 # include OPENSSL_UNISTD
84 #include <openssl/fips.h>
85 #include "fips_locl.h"
89 void *OPENSSL_stderr(void);
91 #define AES_BLOCK_LENGTH 16
94 /* AES FIPS PRNG implementation */
103 unsigned long counter;
106 /* Temporary storage for key if it equals seed length */
107 unsigned char tmp_key[AES_BLOCK_LENGTH];
108 unsigned char V[AES_BLOCK_LENGTH];
109 unsigned char DT[AES_BLOCK_LENGTH];
110 unsigned char last[AES_BLOCK_LENGTH];
113 static FIPS_PRNG_CTX sctx;
115 static int fips_prng_fail = 0;
117 void FIPS_x931_stick(int onoff)
119 fips_prng_fail = onoff;
122 static void fips_rand_prng_reset(FIPS_PRNG_CTX *ctx)
131 OPENSSL_cleanse(ctx->V, AES_BLOCK_LENGTH);
132 OPENSSL_cleanse(&ctx->ks, sizeof(AES_KEY));
136 static int fips_set_prng_key(FIPS_PRNG_CTX *ctx,
137 const unsigned char *key, unsigned int keylen)
139 if (FIPS_selftest_failed())
141 FIPSerr(FIPS_F_FIPS_SET_PRNG_KEY, FIPS_R_SELFTEST_FAILED);
144 if (keylen != 16 && keylen != 24 && keylen != 32)
146 /* error: invalid key size */
149 AES_set_encrypt_key(key, keylen << 3, &ctx->ks);
152 memcpy(ctx->tmp_key, key, 16);
162 static int fips_set_prng_seed(FIPS_PRNG_CTX *ctx,
163 const unsigned char *seed, unsigned int seedlen)
168 /* In test mode seed is just supplied data */
171 if (seedlen != AES_BLOCK_LENGTH)
173 memcpy(ctx->V, seed, AES_BLOCK_LENGTH);
177 /* Outside test mode XOR supplied data with existing seed */
178 for (i = 0; i < seedlen; i++)
180 ctx->V[ctx->vpos++] ^= seed[i];
181 if (ctx->vpos == AES_BLOCK_LENGTH)
184 /* Special case if first seed and key length equals
185 * block size check key and seed do not match.
189 if (!memcmp(ctx->tmp_key, ctx->V, 16))
191 RANDerr(RAND_F_FIPS_SET_PRNG_SEED,
192 RAND_R_PRNG_SEED_MUST_NOT_MATCH_KEY);
195 OPENSSL_cleanse(ctx->tmp_key, 16);
204 static int fips_set_test_mode(FIPS_PRNG_CTX *ctx)
208 RANDerr(RAND_F_FIPS_SET_TEST_MODE,RAND_R_PRNG_KEYED);
215 int FIPS_x931_test_mode(void)
217 return fips_set_test_mode(&sctx);
220 int FIPS_x931_set_dt(unsigned char *dt)
224 RANDerr(RAND_F_FIPS_X931_SET_DT,RAND_R_NOT_IN_TEST_MODE);
227 memcpy(sctx.DT, dt, AES_BLOCK_LENGTH);
231 void FIPS_get_timevec(unsigned char *buf, unsigned long *pctr)
233 #ifdef OPENSSL_SYS_WIN32
235 #elif defined(OPENSSL_SYS_VXWORKS)
241 #ifndef GETPID_IS_MEANINGLESS
245 #ifdef OPENSSL_SYS_WIN32
246 GetSystemTimeAsFileTime(&ft);
247 buf[0] = (unsigned char) (ft.dwHighDateTime & 0xff);
248 buf[1] = (unsigned char) ((ft.dwHighDateTime >> 8) & 0xff);
249 buf[2] = (unsigned char) ((ft.dwHighDateTime >> 16) & 0xff);
250 buf[3] = (unsigned char) ((ft.dwHighDateTime >> 24) & 0xff);
251 buf[4] = (unsigned char) (ft.dwLowDateTime & 0xff);
252 buf[5] = (unsigned char) ((ft.dwLowDateTime >> 8) & 0xff);
253 buf[6] = (unsigned char) ((ft.dwLowDateTime >> 16) & 0xff);
254 buf[7] = (unsigned char) ((ft.dwLowDateTime >> 24) & 0xff);
255 #elif defined(OPENSSL_SYS_VXWORKS)
256 clock_gettime(CLOCK_REALTIME, &ts);
257 buf[0] = (unsigned char) (ts.tv_sec & 0xff);
258 buf[1] = (unsigned char) ((ts.tv_sec >> 8) & 0xff);
259 buf[2] = (unsigned char) ((ts.tv_sec >> 16) & 0xff);
260 buf[3] = (unsigned char) ((ts.tv_sec >> 24) & 0xff);
261 buf[4] = (unsigned char) (ts.tv_nsec & 0xff);
262 buf[5] = (unsigned char) ((ts.tv_nsec >> 8) & 0xff);
263 buf[6] = (unsigned char) ((ts.tv_nsec >> 16) & 0xff);
264 buf[7] = (unsigned char) ((ts.tv_nsec >> 24) & 0xff);
266 gettimeofday(&tv,NULL);
267 buf[0] = (unsigned char) (tv.tv_sec & 0xff);
268 buf[1] = (unsigned char) ((tv.tv_sec >> 8) & 0xff);
269 buf[2] = (unsigned char) ((tv.tv_sec >> 16) & 0xff);
270 buf[3] = (unsigned char) ((tv.tv_sec >> 24) & 0xff);
271 buf[4] = (unsigned char) (tv.tv_usec & 0xff);
272 buf[5] = (unsigned char) ((tv.tv_usec >> 8) & 0xff);
273 buf[6] = (unsigned char) ((tv.tv_usec >> 16) & 0xff);
274 buf[7] = (unsigned char) ((tv.tv_usec >> 24) & 0xff);
276 buf[8] = (unsigned char) (*pctr & 0xff);
277 buf[9] = (unsigned char) ((*pctr >> 8) & 0xff);
278 buf[10] = (unsigned char) ((*pctr >> 16) & 0xff);
279 buf[11] = (unsigned char) ((*pctr >> 24) & 0xff);
284 #ifndef GETPID_IS_MEANINGLESS
285 pid=(unsigned long)getpid();
286 buf[12] = (unsigned char) (pid & 0xff);
287 buf[13] = (unsigned char) ((pid >> 8) & 0xff);
288 buf[14] = (unsigned char) ((pid >> 16) & 0xff);
289 buf[15] = (unsigned char) ((pid >> 24) & 0xff);
293 static int fips_rand(FIPS_PRNG_CTX *ctx,
294 unsigned char *out, unsigned int outlen)
296 unsigned char R[AES_BLOCK_LENGTH], I[AES_BLOCK_LENGTH];
297 unsigned char tmp[AES_BLOCK_LENGTH];
301 RANDerr(RAND_F_FIPS_RAND,RAND_R_PRNG_ERROR);
306 RANDerr(RAND_F_FIPS_RAND,RAND_R_NO_KEY_SET);
311 RANDerr(RAND_F_FIPS_RAND,RAND_R_PRNG_NOT_SEEDED);
317 FIPS_get_timevec(ctx->DT, &ctx->counter);
318 AES_encrypt(ctx->DT, I, &ctx->ks);
319 for (i = 0; i < AES_BLOCK_LENGTH; i++)
320 tmp[i] = I[i] ^ ctx->V[i];
321 AES_encrypt(tmp, R, &ctx->ks);
322 for (i = 0; i < AES_BLOCK_LENGTH; i++)
323 tmp[i] = R[i] ^ I[i];
324 AES_encrypt(tmp, ctx->V, &ctx->ks);
325 /* Continuous PRNG test */
329 memcpy(ctx->last, R, AES_BLOCK_LENGTH);
330 if (!memcmp(R, ctx->last, AES_BLOCK_LENGTH))
332 RANDerr(RAND_F_FIPS_RAND,RAND_R_PRNG_STUCK);
334 fips_set_selftest_fail();
338 memcpy(ctx->last, R, AES_BLOCK_LENGTH);
346 if (outlen <= AES_BLOCK_LENGTH)
348 memcpy(out, R, outlen);
352 memcpy(out, R, AES_BLOCK_LENGTH);
353 out += AES_BLOCK_LENGTH;
354 outlen -= AES_BLOCK_LENGTH;
360 int FIPS_x931_set_key(const unsigned char *key, int keylen)
363 CRYPTO_w_lock(CRYPTO_LOCK_RAND);
364 ret = fips_set_prng_key(&sctx, key, keylen);
365 CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
369 int FIPS_x931_seed(const void *seed, int seedlen)
372 CRYPTO_w_lock(CRYPTO_LOCK_RAND);
373 ret = fips_set_prng_seed(&sctx, seed, seedlen);
374 CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
379 int FIPS_x931_bytes(unsigned char *out, int count)
382 CRYPTO_w_lock(CRYPTO_LOCK_RAND);
383 ret = fips_rand(&sctx, out, count);
384 CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
388 int FIPS_x931_status(void)
391 CRYPTO_r_lock(CRYPTO_LOCK_RAND);
393 CRYPTO_r_unlock(CRYPTO_LOCK_RAND);
397 void FIPS_x931_reset(void)
399 CRYPTO_w_lock(CRYPTO_LOCK_RAND);
400 fips_rand_prng_reset(&sctx);
401 CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
404 static int fips_do_rand_seed(const void *seed, int seedlen)
406 FIPS_x931_seed(seed, seedlen);
410 static int fips_do_rand_add(const void *seed, int seedlen,
413 FIPS_x931_seed(seed, seedlen);
417 static const RAND_METHOD rand_x931_meth=
427 const RAND_METHOD *FIPS_x931_method(void)
429 return &rand_x931_meth;