* 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:
* 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
+ * 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
* 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
#include <stdio.h>
#include <time.h>
+#include "cryptlib.h"
#include <openssl/rand.h>
-#ifdef NO_RAND
-static RAND_METHOD *rand_meth=NULL;
-#else
-extern RAND_METHOD rand_ssleay_meth;
-static RAND_METHOD *rand_meth= &rand_ssleay_meth;
+#ifndef OPENSSL_NO_ENGINE
+# include <openssl/engine.h>
+#endif
+
+#ifdef OPENSSL_FIPS
+# include <openssl/fips.h>
+# include <openssl/fips_rand.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;
+}
-void RAND_set_rand_method(RAND_METHOD *meth)
- {
- rand_meth=meth;
- }
+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;
+}
-RAND_METHOD *RAND_get_rand_method(void)
- {
- return(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)
- {
- if (rand_meth != NULL)
- rand_meth->cleanup();
- }
+{
+ 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)
- {
- if (rand_meth != NULL)
- rand_meth->seed(buf,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)
- {
- if (rand_meth != NULL)
- rand_meth->add(buf,num,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)
- {
- if (rand_meth != NULL)
- return rand_meth->bytes(buf,num);
- return(-1);
- }
+{
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->bytes)
+ return meth->bytes(buf, num);
+ return (-1);
+}
+#ifndef OPENSSL_NO_DEPRECATED
int RAND_pseudo_bytes(unsigned char *buf, int num)
- {
- if (rand_meth != NULL)
- return rand_meth->pseudorand(buf,num);
- return(-1);
- }
+{
+ const RAND_METHOD *meth = RAND_get_rand_method();
+ if (meth && meth->pseudorand)
+ return meth->pseudorand(buf, num);
+ return (-1);
+}
+#endif
int RAND_status(void)
- {
- if (rand_meth != NULL)
- return rand_meth->status();
- return 0;
- }
+{
+ 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 (RAND_SSLeay()->bytes(*pout, min_len) <= 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);
+ rand_hw_xor(buf, sizeof(buf));
+ *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)
+{
+ return RAND_SSLeay()->add(in, inlen, entropy);
+}
+
+static int drbg_rand_seed(DRBG_CTX *ctx, const void *in, int inlen)
+{
+ return RAND_SSLeay()->seed(in, inlen);
+}
+
+int RAND_init_fips(void)
+{
+ DRBG_CTX *dctx;
+ size_t plen;
+ unsigned char pers[32], *p;
+ dctx = FIPS_get_default_drbg();
+ FIPS_drbg_init(dctx, NID_aes_256_ctr, DRBG_FLAG_CTR_USE_DF);
+ 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);
+
+ FIPS_drbg_instantiate(dctx, pers, sizeof(pers));
+ FIPS_rand_set_method(FIPS_drbg_method());
+ return 1;
+}
+
+#endif