fs/reiser4/plugin/crypto/digest.c

   1 /* Copyright 2001, 2002, 2003 by Hans Reiser, licensing governed by reiser4/README */
   2
   3 /* reiser4 digest transform plugin (is used by cryptcompress object plugin) */
   4 /* EDWARD-FIXME-HANS: and it does what? a digest is a what? */
   5 #include "../../debug.h"
   6 #include "../plugin_header.h"
   7 #include "../plugin.h"
   8 #include "../file/cryptcompress.h"
   9
  10 #include <linux/types.h>
  11
  12 extern digest_plugin digest_plugins[LAST_DIGEST_ID];
  13
  14 static struct crypto_hash * alloc_sha256 (void)
  15 {
  16 #if REISER4_SHA256
  17         return crypto_alloc_hash ("sha256", 0, CRYPTO_ALG_ASYNC);
  18 #else
  19         warning("edward-1418", "sha256 unsupported");
  20         return ERR_PTR(-EINVAL);
  21 #endif
  22 }
  23
  24 static void free_sha256 (struct crypto_hash * tfm)
  25 {
  26 #if REISER4_SHA256
  27         crypto_free_hash(tfm);
  28 #endif
  29         return;
  30 }
  31
  32 /* digest plugins */
  33 digest_plugin digest_plugins[LAST_DIGEST_ID] = {
  34         [SHA256_32_DIGEST_ID] = {
  35                 .h = {
  36                         .type_id = REISER4_DIGEST_PLUGIN_TYPE,
  37                         .id = SHA256_32_DIGEST_ID,
  38                         .pops = NULL,
  39                         .label = "sha256_32",
  40                         .desc = "sha256_32 digest transform",
  41                         .linkage = {NULL, NULL}
  42                 },
  43                 .fipsize = sizeof(__u32),
  44                 .alloc = alloc_sha256,
  45                 .free = free_sha256
  46         }
  47 };
  48
  49 /*
  50   Local variables:
  51   c-indentation-style: "K&R"
  52   mode-name: "LC"
  53   c-basic-offset: 8
  54   tab-width: 8
  55   fill-column: 120
  56   scroll-step: 1
  57   End:
  58 */