cipher.h

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#ifndef CSILK_CIPHER_H
#define CSILK_CIPHER_H
 
#include <stddef.h>
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define CSILK_AES256_KEY_SIZE 32
#define CSILK_GCM_IV_SIZE 12
#define CSILK_GCM_TAG_SIZE 16
#define CSILK_RSA_KEY_BITS 2048
#define CSILK_RSA_KEY_SIZE 256
#define CSILK_RSA_SIGNATURE_SIZE 256
 
typedef struct {
    int (*symmetric_encrypt)(const uint8_t* key,
                 size_t key_len,
                 const uint8_t* plaintext,
                 size_t plaintext_len,
                 const uint8_t* iv,
                 size_t iv_len,
                 uint8_t* ciphertext,
                 size_t* ciphertext_len,
                 uint8_t* tag,
                 size_t tag_len);
 
    int (*symmetric_decrypt)(const uint8_t* key,
                 size_t key_len,
                 const uint8_t* ciphertext,
                 size_t ciphertext_len,
                 const uint8_t* iv,
                 size_t iv_len,
                 const uint8_t* tag,
                 size_t tag_len,
                 uint8_t* plaintext,
                 size_t* plaintext_len);
 
    int (*generate_keypair)(char* public_key,
                size_t* pub_len,
                char* private_key,
                size_t* priv_len);
 
    int (*asymmetric_encrypt)(const char* public_key,
                  size_t pub_len,
                  const uint8_t* plaintext,
                  size_t plaintext_len,
                  uint8_t* ciphertext,
                  size_t* ciphertext_len);
 
    int (*asymmetric_decrypt)(const char* private_key,
                  size_t priv_len,
                  const uint8_t* ciphertext,
                  size_t ciphertext_len,
                  uint8_t* plaintext,
                  size_t* plaintext_len);
 
    int (*sign)(const char* private_key,
            size_t priv_len,
            const uint8_t* data,
            size_t data_len,
            uint8_t* signature,
            size_t* sig_len);
 
    int (*verify)(const char* public_key,
              size_t pub_len,
              const uint8_t* data,
              size_t data_len,
              const uint8_t* signature,
              size_t sig_len);
} csilk_cipher_driver_t;
 
#ifdef __cplusplus
}
#endif
 
#endif