hash.c 1.6 KB

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  1. /*
  2. * Cryptographic Hash operations.
  3. *
  4. * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
  5. *
  6. * This program is free software; you can redistribute it and/or modify it
  7. * under the terms of the GNU General Public License as published by the Free
  8. * Software Foundation; either version 2 of the License, or (at your option)
  9. * any later version.
  10. */
  11. #include <linux/errno.h>
  12. #include <linux/kernel.h>
  13. #include <linux/module.h>
  14. #include <linux/seq_file.h>
  15. #include "internal.h"
  16. static unsigned int crypto_hash_ctxsize(struct crypto_alg *alg, u32 type,
  17. u32 mask)
  18. {
  19. return alg->cra_ctxsize;
  20. }
  21. static int crypto_init_hash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
  22. {
  23. struct hash_tfm *crt = &tfm->crt_hash;
  24. struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
  25. if (alg->digestsize > crypto_tfm_alg_blocksize(tfm))
  26. return -EINVAL;
  27. crt->init = alg->init;
  28. crt->update = alg->update;
  29. crt->final = alg->final;
  30. crt->digest = alg->digest;
  31. crt->setkey = alg->setkey;
  32. crt->digestsize = alg->digestsize;
  33. return 0;
  34. }
  35. static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg)
  36. __attribute_used__;
  37. static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg)
  38. {
  39. seq_printf(m, "type : hash\n");
  40. seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
  41. seq_printf(m, "digestsize : %u\n", alg->cra_hash.digestsize);
  42. }
  43. const struct crypto_type crypto_hash_type = {
  44. .ctxsize = crypto_hash_ctxsize,
  45. .init = crypto_init_hash_ops,
  46. #ifdef CONFIG_PROC_FS
  47. .show = crypto_hash_show,
  48. #endif
  49. };
  50. EXPORT_SYMBOL_GPL(crypto_hash_type);
  51. MODULE_LICENSE("GPL");
  52. MODULE_DESCRIPTION("Generic cryptographic hash type");