ccm.h

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#ifndef MBEDTLS_CCM_H
#define MBEDTLS_CCM_H

#include "cipher.h"

#define MBEDTLS_ERR_CCM_BAD_INPUT      -0x000D 
#define MBEDTLS_ERR_CCM_AUTH_FAILED    -0x000F 
#if defined( MBEDTLS_CCM_ALT )

#include "ccm_alt.h"

#else  /* #if defined( MBEDTLS_CCM_ALT ) */

// Regular implementation

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    mbedtls_cipher_context_t cipher_ctx;    
}
mbedtls_ccm_context;

void mbedtls_ccm_init( mbedtls_ccm_context *ctx );

int mbedtls_ccm_setkey( mbedtls_ccm_context *ctx,
                        mbedtls_cipher_id_t cipher,
                        const unsigned char *key,
                        unsigned int keybits );

void mbedtls_ccm_free( mbedtls_ccm_context *ctx );

int mbedtls_ccm_encrypt_and_tag( mbedtls_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 mbedtls_ccm_auth_decrypt( mbedtls_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(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)

int mbedtls_ccm_self_test( int verbose );
#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */

#ifdef __cplusplus
}
#endif

#endif /* #else of #if defined( MBEDTLS_CCM_ALT ) */

#endif /* MBEDTLS_CCM_H */