#include "config.h"
#include "config.h"
#include MBEDTLS_CONFIG_FILE
#include MBEDTLS_CONFIG_FILE
#include "cipher.h"
#include "cipher.h"
#include "ccm_alt.h"
#include "ccm_alt.h"
#define MBEDTLS_CCM_H
#define MBEDTLS_ERR_CCM_BAD_INPUT 0D /**< Bad input parameters to the function. */
#define MBEDTLS_ERR_CCM_AUTH_FAILED -15 /**< Authenticated decryption failed. */
#define MBEDTLS_ERR_CCM_HW_ACCEL_FAILED -17 /**< CCM hardware accelerator failed. */
/* MBEDTLS_ERR_CCM_HW_ACCEL_FAILED is deprecated and should not be used. */
void mbedtls_ccm_init( mbedtls_ccm_context *ctx );
/** * \brief This function initializes the specified CCM context, * to make references valid, and prepare the context * for mbedtls_ccm_setkey() or mbedtls_ccm_free(). * * \param ctx The CCM context to initialize. This must not be \c NULL. */
int mbedtls_ccm_setkey( mbedtls_ccm_context *ctx,
mbedtls_cipher_id_t cipher,
const unsigned char *key,
unsigned int keybits );
/** * \brief This function initializes the CCM context set in the * \p ctx parameter and sets the encryption key. * * \param ctx The CCM context to initialize. This must be an initialized * context. * \param cipher The 128-bit block cipher to use. * \param key The encryption key. This must not be \c NULL. * \param keybits The key size in bits. This must be acceptable by the cipher. * * \return \c 0 on success. * \return A CCM or cipher-specific error code on failure. */
void mbedtls_ccm_free( mbedtls_ccm_context *ctx );
/** * \brief This function releases and clears the specified CCM context * and underlying cipher sub-context. * * \param ctx The CCM context to clear. If this is \c NULL, the function * has no effect. Otherwise, this must be initialized. */
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 );
/** * \brief This function encrypts a buffer using CCM. * * \note The tag is written to a separate buffer. To concatenate * the \p tag with the \p output, as done in RFC-3610: * Counter with CBC-MAC (CCM), use * \p tag = \p output + \p length, and make sure that the * output buffer is at least \p length + \p tag_len wide. * * \param ctx The CCM context to use for encryption. This must be * initialized and bound to a key. * \param length The length of the input data in Bytes. * \param iv The initialization vector (nonce). This must be a readable * buffer of at least \p iv_len Bytes. * \param iv_len The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12, * or 13. The length L of the message length field is * 15 - \p iv_len. * \param add The additional data field. If \p add_len is greater than * zero, \p add must be a readable buffer of at least that * length. * \param add_len The length of additional data in Bytes. * This must be less than `2^16 - 2^8`. * \param input The buffer holding the input data. If \p length is greater * than zero, \p input must be a readable buffer of at least * that length. * \param output The buffer holding the output data. If \p length is greater * than zero, \p output must be a writable buffer of at least * that length. * \param tag The buffer holding the authentication field. This must be a * readable buffer of at least \p tag_len Bytes. * \param tag_len The length of the authentication field to generate in Bytes: * 4, 6, 8, 10, 12, 14 or 16. * * \return \c 0 on success. * \return A CCM or cipher-specific error code on failure. */
int mbedtls_ccm_star_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 );
/** * \brief This function encrypts a buffer using CCM*. * * \note The tag is written to a separate buffer. To concatenate * the \p tag with the \p output, as done in RFC-3610: * Counter with CBC-MAC (CCM), use * \p tag = \p output + \p length, and make sure that the * output buffer is at least \p length + \p tag_len wide. * * \note When using this function in a variable tag length context, * the tag length has to be encoded into the \p iv passed to * this function. * * \param ctx The CCM context to use for encryption. This must be * initialized and bound to a key. * \param length The length of the input data in Bytes. * \param iv The initialization vector (nonce). This must be a readable * buffer of at least \p iv_len Bytes. * \param iv_len The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12, * or 13. The length L of the message length field is * 15 - \p iv_len. * \param add The additional data field. This must be a readable buffer of * at least \p add_len Bytes. * \param add_len The length of additional data in Bytes. * This must be less than 2^16 - 2^8. * \param input The buffer holding the input data. If \p length is greater * than zero, \p input must be a readable buffer of at least * that length. * \param output The buffer holding the output data. If \p length is greater * than zero, \p output must be a writable buffer of at least * that length. * \param tag The buffer holding the authentication field. This must be a * readable buffer of at least \p tag_len Bytes. * \param tag_len The length of the authentication field to generate in Bytes: * 0, 4, 6, 8, 10, 12, 14 or 16. * * \warning Passing \c 0 as \p tag_len means that the message is no * longer authenticated. * * \return \c 0 on success. * \return A CCM or cipher-specific error code on failure. */
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 );
/** * \brief This function performs a CCM authenticated decryption of a * buffer. * * \param ctx The CCM context to use for decryption. This must be * initialized and bound to a key. * \param length The length of the input data in Bytes. * \param iv The initialization vector (nonce). This must be a readable * buffer of at least \p iv_len Bytes. * \param iv_len The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12, * or 13. The length L of the message length field is * 15 - \p iv_len. * \param add The additional data field. This must be a readable buffer * of at least that \p add_len Bytes.. * \param add_len The length of additional data in Bytes. * This must be less than 2^16 - 2^8. * \param input The buffer holding the input data. If \p length is greater * than zero, \p input must be a readable buffer of at least * that length. * \param output The buffer holding the output data. If \p length is greater * than zero, \p output must be a writable buffer of at least * that length. * \param tag The buffer holding the authentication field. This must be a * readable buffer of at least \p tag_len Bytes. * \param tag_len The length of the authentication field to generate in Bytes: * 4, 6, 8, 10, 12, 14 or 16. * * \return \c 0 on success. This indicates that the message is authentic. * \return #MBEDTLS_ERR_CCM_AUTH_FAILED if the tag does not match. * \return A cipher-specific error code on calculation failure. */
int mbedtls_ccm_star_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 );
/** * \brief This function performs a CCM* authenticated decryption of a * buffer. * * \note When using this function in a variable tag length context, * the tag length has to be decoded from \p iv and passed to * this function as \p tag_len. (\p tag needs to be adjusted * accordingly.) * * \param ctx The CCM context to use for decryption. This must be * initialized and bound to a key. * \param length The length of the input data in Bytes. * \param iv The initialization vector (nonce). This must be a readable * buffer of at least \p iv_len Bytes. * \param iv_len The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12, * or 13. The length L of the message length field is * 15 - \p iv_len. * \param add The additional data field. This must be a readable buffer of * at least that \p add_len Bytes. * \param add_len The length of additional data in Bytes. * This must be less than 2^16 - 2^8. * \param input The buffer holding the input data. If \p length is greater * than zero, \p input must be a readable buffer of at least * that length. * \param output The buffer holding the output data. If \p length is greater * than zero, \p output must be a writable buffer of at least * that length. * \param tag The buffer holding the authentication field. This must be a * readable buffer of at least \p tag_len Bytes. * \param tag_len The length of the authentication field in Bytes. * 0, 4, 6, 8, 10, 12, 14 or 16. * * \warning Passing \c 0 as \p tag_len means that the message is nos * longer authenticated. * * \return \c 0 on success. * \return #MBEDTLS_ERR_CCM_AUTH_FAILED if the tag does not match. * \return A cipher-specific error code on calculation failure. */
int mbedtls_ccm_self_test( int verbose );
/** * \brief The CCM checkup routine. * * \return \c 0 on success. * \return \c 1 on failure. */
typedef struct mbedtls_ccm_context
{
mbedtls_cipher_context_t cipher_ctx; /*!< The cipher context used. */
}
mbedtls_ccm_context;
/** * \brief The CCM context-type definition. The CCM context is passed * to the APIs called. */