ccm.h

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#ifndef POLARSSL_CCM_H
#define POLARSSL_CCM_H
 
#include "cipher.h"
 
#define POLARSSL_ERR_CCM_BAD_INPUT      -0x000D 
#define POLARSSL_ERR_CCM_AUTH_FAILED    -0x000F 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef struct {
    cipher_context_t cipher_ctx;    
}
ccm_context;
 
int ccm_init( ccm_context *ctx, cipher_id_t cipher,
              const unsigned char *key, unsigned int keysize );
 
void ccm_free( ccm_context *ctx );
 
int ccm_encrypt_and_tag( ccm_context *ctx, size_t length,
                         const unsigned char *iv, size_t iv_len,
                         const unsigned char *add, size_t add_len,
                         const unsigned char *input, unsigned char *output,
                         unsigned char *tag, size_t tag_len );
 
int ccm_auth_decrypt( ccm_context *ctx, size_t length,
                      const unsigned char *iv, size_t iv_len,
                      const unsigned char *add, size_t add_len,
                      const unsigned char *input, unsigned char *output,
                      const unsigned char *tag, size_t tag_len );
 
#if defined(POLARSSL_SELF_TEST) && defined(POLARSSL_AES_C)
int ccm_self_test( int verbose );
#endif /* POLARSSL_SELF_TEST && POLARSSL_AES_C */
 
#ifdef __cplusplus
}
#endif
 
#endif /* POLARSSL_CGM_H */