src/ies.h

   1 /**
   2  * reference: ecies.h
   3  */
   4
   5 #ifndef _IES_H_
   6 #define _IES_H_
   7
   8 #include <openssl/ssl.h>
   9 #include <openssl/crypto.h>
  10 #include <openssl/err.h>
  11
  12 typedef struct {
  13     const EVP_CIPHER *cipher;
  14     const EVP_MD *md;                 /* for mac tag */
  15     const EVP_MD *kdf_md;         /* for KDF */
  16     size_t stored_key_length;
  17     const EC_KEY *user_key;
  18 } ies_ctx_t;
  19
  20 typedef struct {
  21     struct {
  22         size_t key;
  23         size_t mac;
  24         size_t body;
  25     } length;
  26 } cryptogram_head_t;
  27
  28 typedef unsigned char * cryptogram_t;
  29
  30 void cryptogram_free(cryptogram_t *cryptogram);
  31 unsigned char * cryptogram_key_data(const cryptogram_t *cryptogram);
  32 unsigned char * cryptogram_mac_data(const cryptogram_t *cryptogram);
  33 unsigned char * cryptogram_body_data(const cryptogram_t *cryptogram);
  34 size_t cryptogram_key_length(const cryptogram_t *cryptogram);
  35 size_t cryptogram_mac_length(const cryptogram_t *cryptogram);
  36 size_t cryptogram_body_length(const cryptogram_t *cryptogram);
  37 size_t cryptogram_data_sum_length(const cryptogram_t *cryptogram);
  38 size_t cryptogram_total_length(const cryptogram_t *cryptogram);
  39 cryptogram_t * cryptogram_alloc(size_t key, size_t mac, size_t body);
  40 cryptogram_t * ecies_encrypt(const ies_ctx_t *ctx, const unsigned char *data, size_t length, char *error);
  41 unsigned char * ecies_decrypt(const ies_ctx_t *ctx, const cryptogram_t *cryptogram, size_t *length, char *error);
  42 ies_ctx_t *create_context(EC_KEY *user_key);
  43
  44 #endif /* _IES_H_ */