--- /dev/null
+/* crypto/rand/rand_lib.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include <time.h>
+#include "cryptlib.h"
+#include <openssl/rand.h>
+
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
+
+#ifdef OPENSSL_FIPS
+#include <openssl/fips.h>
+#include <openssl/fips_rand.h>
+#include "rand_lcl.h"
+#endif
+
+#ifndef OPENSSL_NO_ENGINE
+/* non-NULL if default_RAND_meth is ENGINE-provided */
+static ENGINE *funct_ref =NULL;
+#endif
+static const RAND_METHOD *default_RAND_meth = NULL;
+
+int RAND_set_rand_method(const RAND_METHOD *meth)
+ {
+#ifndef OPENSSL_NO_ENGINE
+ if(funct_ref)
+ {
+ ENGINE_finish(funct_ref);
+ funct_ref = NULL;
+ }
+#endif
+ default_RAND_meth = meth;
+ return 1;
+ }
+
+const RAND_METHOD *RAND_get_rand_method(void)
+ {
+ if (!default_RAND_meth)
+ {
+#ifndef OPENSSL_NO_ENGINE
+ ENGINE *e = ENGINE_get_default_RAND();
+ if(e)
+ {
+ default_RAND_meth = ENGINE_get_RAND(e);
+ if(!default_RAND_meth)
+ {
+ ENGINE_finish(e);
+ e = NULL;
+ }
+ }
+ if(e)
+ funct_ref = e;
+ else
+#endif
+ default_RAND_meth = RAND_SSLeay();
+ }
+ return default_RAND_meth;
+ }
+
+#ifndef OPENSSL_NO_ENGINE
+int RAND_set_rand_engine(ENGINE *engine)
+ {
+ const RAND_METHOD *tmp_meth = NULL;
+ if(engine)
+ {
+ if(!ENGINE_init(engine))
+ return 0;
+ tmp_meth = ENGINE_get_RAND(engine);
+ if(!tmp_meth)
+ {
+ ENGINE_finish(engine);
+ return 0;
+ }
+ }
+ /* This function releases any prior ENGINE so call it first */
+ RAND_set_rand_method(tmp_meth);
+ funct_ref = engine;
+ return 1;
+ }
+#endif
+
+void RAND_cleanup(void)
+ {
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->cleanup)
+ meth->cleanup();
+ RAND_set_rand_method(NULL);
+ }
+
+void RAND_seed(const void *buf, int num)
+ {
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->seed)
+ meth->seed(buf,num);
+ }
+
+void RAND_add(const void *buf, int num, double entropy)
+ {
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->add)
+ meth->add(buf,num,entropy);
+ }
+
+int RAND_bytes(unsigned char *buf, int num)
+ {
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->bytes)
+ return meth->bytes(buf,num);
+ return(-1);
+ }
+
+int RAND_pseudo_bytes(unsigned char *buf, int num)
+ {
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->pseudorand)
+ return meth->pseudorand(buf,num);
+ return(-1);
+ }
+
+int RAND_status(void)
+ {
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->status)
+ return meth->status();
+ return 0;
+ }
+
+#ifdef OPENSSL_FIPS
+
+/* FIPS DRBG initialisation code. This sets up the DRBG for use by the
+ * rest of OpenSSL.
+ */
+
+/* Entropy gatherer: use standard OpenSSL PRNG to seed (this will gather
+ * entropy internally through RAND_poll().
+ */
+
+static size_t drbg_get_entropy(DRBG_CTX *ctx, unsigned char **pout,
+ int entropy, size_t min_len, size_t max_len)
+ {
+ /* Round up request to multiple of block size */
+ min_len = ((min_len + 19) / 20) * 20;
+ *pout = OPENSSL_malloc(min_len);
+ if (!*pout)
+ return 0;
+ if (ssleay_rand_bytes(*pout, min_len, 0, 0) <= 0)
+ {
+ OPENSSL_free(*pout);
+ *pout = NULL;
+ return 0;
+ }
+ return min_len;
+ }
+
+static void drbg_free_entropy(DRBG_CTX *ctx, unsigned char *out, size_t olen)
+ {
+ if (out)
+ {
+ OPENSSL_cleanse(out, olen);
+ OPENSSL_free(out);
+ }
+ }
+
+/* Set "additional input" when generating random data. This uses the
+ * current PID, a time value and a counter.
+ */
+
+static size_t drbg_get_adin(DRBG_CTX *ctx, unsigned char **pout)
+ {
+ /* Use of static variables is OK as this happens under a lock */
+ static unsigned char buf[16];
+ static unsigned long counter;
+ FIPS_get_timevec(buf, &counter);
+ *pout = buf;
+ return sizeof(buf);
+ }
+
+/* RAND_add() and RAND_seed() pass through to OpenSSL PRNG so it is
+ * correctly seeded by RAND_poll().
+ */
+
+static int drbg_rand_add(DRBG_CTX *ctx, const void *in, int inlen,
+ double entropy)
+ {
+ RAND_SSLeay()->add(in, inlen, entropy);
+ return 1;
+ }
+
+static int drbg_rand_seed(DRBG_CTX *ctx, const void *in, int inlen)
+ {
+ RAND_SSLeay()->seed(in, inlen);
+ return 1;
+ }
+
+#ifndef OPENSSL_DRBG_DEFAULT_TYPE
+#define OPENSSL_DRBG_DEFAULT_TYPE NID_aes_256_ctr
+#endif
+#ifndef OPENSSL_DRBG_DEFAULT_FLAGS
+#define OPENSSL_DRBG_DEFAULT_FLAGS DRBG_FLAG_CTR_USE_DF
+#endif
+
+static int fips_drbg_type = OPENSSL_DRBG_DEFAULT_TYPE;
+static int fips_drbg_flags = OPENSSL_DRBG_DEFAULT_FLAGS;
+
+void RAND_set_fips_drbg_type(int type, int flags)
+ {
+ fips_drbg_type = type;
+ fips_drbg_flags = flags;
+ }
+
+int RAND_init_fips(void)
+ {
+ DRBG_CTX *dctx;
+ size_t plen;
+ unsigned char pers[32], *p;
+#ifndef OPENSSL_ALLOW_DUAL_EC_DRBG
+ if (fips_drbg_type >> 16)
+ {
+ RANDerr(RAND_F_RAND_INIT_FIPS, RAND_R_DUAL_EC_DRBG_DISABLED);
+ return 0;
+ }
+#endif
+
+ dctx = FIPS_get_default_drbg();
+ if (FIPS_drbg_init(dctx, fips_drbg_type, fips_drbg_flags) <= 0)
+ {
+ RANDerr(RAND_F_RAND_INIT_FIPS, RAND_R_ERROR_INITIALISING_DRBG);
+ return 0;
+ }
+
+ FIPS_drbg_set_callbacks(dctx,
+ drbg_get_entropy, drbg_free_entropy, 20,
+ drbg_get_entropy, drbg_free_entropy);
+ FIPS_drbg_set_rand_callbacks(dctx, drbg_get_adin, 0,
+ drbg_rand_seed, drbg_rand_add);
+ /* Personalisation string: a string followed by date time vector */
+ strcpy((char *)pers, "OpenSSL DRBG2.0");
+ plen = drbg_get_adin(dctx, &p);
+ memcpy(pers + 16, p, plen);
+
+ if (FIPS_drbg_instantiate(dctx, pers, sizeof(pers)) <= 0)
+ {
+ RANDerr(RAND_F_RAND_INIT_FIPS, RAND_R_ERROR_INSTANTIATING_DRBG);
+ return 0;
+ }
+ FIPS_rand_set_method(FIPS_drbg_method());
+ return 1;
+ }
+
+#endif
projects / cassiopeia.git / blobdiff