src/crypto/hcrypto/kernel/rand.c

   1 /* A trivial implementation of hcrypto's RAND interface for
   2  * kernel use */
   3
   4 #include <config.h>
   5 #include <evp.h>
   6 #include <evp-hcrypto.h>
   7 #include <aes.h>
   8 #include <sha.h>
   9 #include <heim_threads.h>
  10
  11 /*
  12  * This mutex is used to synchronize hcrypto operations in the kernel.
  13  * We cheat and assume that all access into hcrypto comes through routines
  14  * in this file, so that we can ensure it is initialized before it is used.
  15  */
  16 afs_kmutex_t hckernel_mutex;
  17
  18 /* Called from osi_Init(); will only run once. */
  19 void
  20 init_hckernel_mutex(void)
  21 {
  22     MUTEX_INIT(&hckernel_mutex, "hckernel", MUTEX_DEFAULT, 0);
  23 }
  24
  25 void
  26 RAND_seed(const void *indata, size_t size)
  27 {
  28     const RAND_METHOD *m = RAND_fortuna_method();
  29     m->seed(indata, size);
  30 }
  31
  32 int
  33 RAND_bytes(void *outdata, size_t size)
  34 {
  35     if (size == 0)
  36         return 0;
  37 #if defined(AFS_AIX_ENV) || defined(AFS_DFBSD_ENV) || defined(AFS_HPUX_ENV) || defined(AFS_SGI_ENV)
  38     const RAND_METHOD *m = RAND_fortuna_method();
  39     return m->bytes(outdata, size);
  40 #else
  41     if (osi_readRandom(outdata, size))
  42         return 0;
  43 #endif
  44     return 1;
  45 }