src/crypto.h

   1 #ifndef __ISDS_CRYPTO_H__
   2 #define __ISDS_CRYPTO_H__
   3
   4 #include "isds.h"
   5
   6 /* Inicialize libgrcypt if not yet done by application or other library.
   7  * @current_version is static string describing cerrent gcrypt version
   8  * @return IE_SUCCESS if everything is O.k. */
   9 isds_error init_gcrypt(const char **current_version);
  10
  11 /* Computes hash from @input with @length and store it into @hash.
  12  * The hash algoritm is defined inside @hash.
  13  * @input is input block to hash
  14  * @length is @input block length in bytes
  15  * @hash input algoritm, output hash value and hash length; hash value will be
  16  * reallocated, it's always valid pointer or NULL (before and after call) */
  17 isds_error compute_hash(const void *input, const size_t length,
  18         struct isds_hash *hash);
  19
  20 /* Inicialize GPGME.
  21  * @current_version is pointer to static string decribing currnet gpgme
  22  * @return IE_SUCCESS if everything is O.k. */
  23 isds_error init_gpgme(const char **current_version);
  24
  25 /* Free CMS data buffer allocated inside extract_cms_data().
  26  * This is necesary because GPGME.
  27  * @buffer is pointer to memory to free */
  28 void cms_data_free(void *buffer);
  29
  30 /* Extract data from CMS (successor of PKCS#7)
  31  * @context is session context
  32  * @cms is input block with CMS structure
  33  * @cms_length is @cms block length in bytes
  34  * @data are automatically reallocated bit stream with data found in @cms
  35  * You must free them with cms_data_free().
  36  * @data_length is length of @data in bytes */
  37 isds_error extract_cms_data(struct isds_ctx *context,
  38         const void *cms, const size_t cms_length,
  39         void **data, size_t *data_length);
  40
  41 #endif