Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#ifdef WIN32
+#include <windows.h>
+#include <wincrypt.h>
+#endif
+
#include "d0_bignum.h"
#include <gmp.h>
#include <time.h>
#include <stdio.h>
-void d0_bignum_INITIALIZE(void)
+
+WARN_UNUSED_RESULT BOOL d0_bignum_INITIALIZE(void)
{
FILE *f;
+ BOOL ret = 1;
+ unsigned char buf[256];
d0_bignum_init(&temp);
gmp_randinit_mt(RANDSTATE);
gmp_randseed_ui(RANDSTATE, time(NULL));
+ * (time_t *) (&buf[0]) = time(0); // if everything else fails, we use the current time + uninitialized data
+#ifdef WIN32
+ {
+ HCRYPTPROV hCryptProv;
+ if(CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))
+ {
+ if(!CryptGenRandom(hCryptProv, sizeof(buf), (PBYTE) &buf[0]))
+ {
+ fprintf(stderr, "WARNING: could not initialize random number generator (CryptGenRandom failed)\n");
+ ret = 0;
+ }
+ CryptReleaseContext(hCryptProv, 0);
+ }
+ else if(CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_NEWKEYSET))
+ {
+ if(!CryptGenRandom(hCryptProv, sizeof(buf), (PBYTE) &buf[0]))
+ {
+ fprintf(stderr, "WARNING: could not initialize random number generator (CryptGenRandom failed)\n");
+ ret = 0;
+ }
+ CryptReleaseContext(hCryptProv, 0);
+ }
+ else
+ {
+ fprintf(stderr, "WARNING: could not initialize random number generator (CryptAcquireContext failed)\n");
+ ret = 0;
+ }
+ }
+#else
f = fopen("/dev/urandom", "rb");
if(!f)
f = fopen("/dev/random", "rb");
if(f)
{
- unsigned char buf[256];
setbuf(f, NULL);
- if(fread(buf, sizeof(buf), 1, f) == 1)
+ if(fread(buf, sizeof(buf), 1, f) != 1)
{
- mpz_import(temp.z, sizeof(buf), 1, 1, 0, 0, buf);
- gmp_randseed(RANDSTATE, temp.z);
+ fprintf(stderr, "WARNING: could not initialize random number generator (read from random device failed)\n");
+ ret = 0;
}
fclose(f);
}
+ else
+ {
+ fprintf(stderr, "WARNING: could not initialize random number generator (no random device found)\n");
+ ret = 0;
+ }
+#endif
+
+ mpz_import(temp.z, sizeof(buf), 1, 1, 0, 0, buf);
+ gmp_randseed(RANDSTATE, temp.z);
+
+ return ret;
}
void d0_bignum_SHUTDOWN(void)