/**
* Shallow wrapper around uuid, that comes up with some random pseudo
* uuid if uuid is not available
*/
char *
generateUUID(void)
{
#ifdef HAVE_UUID
# ifdef UUID_PRINTABLE_STRING_LENGTH
/* Solaris */
char out[UUID_PRINTABLE_STRING_LENGTH];
# else
char out[37];
# endif
uuid_t uuid;
uuid_generate(uuid);
uuid_unparse(uuid, out);
#else
/* try to do some pseudo interesting stuff, and stash it in the
* format of a UUID to at least return some uniform answer */
char out[37];
#ifdef HAVE_OPENSSL
unsigned char randbuf[16];
if (RAND_bytes(randbuf, 16) >= 0)
snprintf(out, sizeof(out),
"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x%02x%02x%02x%02x",
randbuf[0], randbuf[1], randbuf[2], randbuf[3],
randbuf[4], randbuf[5], randbuf[6], randbuf[7],
randbuf[8], randbuf[9], randbuf[10], randbuf[11],
randbuf[12], randbuf[13], randbuf[14], randbuf[15]);
else
#else
#ifdef HAVE_COMMONCRYPTO
unsigned char randbuf[16];
if (CCRandomGenerateBytes(randbuf, 16) == kCCSuccess)
snprintf(out, sizeof(out),
"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x%02x%02x%02x%02x",
randbuf[0], randbuf[1], randbuf[2], randbuf[3],
randbuf[4], randbuf[5], randbuf[6], randbuf[7],
randbuf[8], randbuf[9], randbuf[10], randbuf[11],
randbuf[12], randbuf[13], randbuf[14], randbuf[15]);
else
#endif
#endif
/* generate something like this:
* cefa7a9c-1dd2-11b2-8350-880020adbeef
* ("%08x-%04x-%04x-%04x-%012x") */
snprintf(out, sizeof(out),
"%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
rand() % 65536, rand() % 65536,
rand() % 65536, rand() % 65536,
rand() % 65536, rand() % 65536,
rand() % 65536, rand() % 65536);
#endif
return strdup(out);
}
C4Err RNG_GetBytes( void * out,
size_t outLen
)
{
C4Err err = kC4Err_NoErr;
#if _USES_COMMON_CRYPTO_
if( CCRandomGenerateBytes(out, outLen) != kCCSuccess)
err = kC4Err_ResourceUnavailable;
#else
unsigned long count = sprng_read(out,outLen,NULL);
if(count != outLen)
err = kC4Err_ResourceUnavailable;
#endif
return (err);
}
int32_t mz_crypt_rand(uint8_t *buf, int32_t size)
{
if (CCRandomGenerateBytes(buf, size) != kCCSuccess)
return 0;
return size;
}