mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-11-27 05:34:16 +01:00
309 lines
14 KiB
C
309 lines
14 KiB
C
/**
|
|
* \file ccm.h
|
|
*
|
|
* \brief This file provides an API for the CCM authenticated encryption
|
|
* mode for block ciphers.
|
|
*
|
|
* CCM combines Counter mode encryption with CBC-MAC authentication
|
|
* for 128-bit block ciphers.
|
|
*
|
|
* Input to CCM includes the following elements:
|
|
* <ul><li>Payload - data that is both authenticated and encrypted.</li>
|
|
* <li>Associated data (Adata) - data that is authenticated but not
|
|
* encrypted, For example, a header.</li>
|
|
* <li>Nonce - A unique value that is assigned to the payload and the
|
|
* associated data.</li></ul>
|
|
*
|
|
* Definition of CCM:
|
|
* http://csrc.nist.gov/publications/nistpubs/800-38C/SP800-38C_updated-July20_2007.pdf
|
|
* RFC 3610 "Counter with CBC-MAC (CCM)"
|
|
*
|
|
* Related:
|
|
* RFC 5116 "An Interface and Algorithms for Authenticated Encryption"
|
|
*
|
|
* Definition of CCM*:
|
|
* IEEE 802.15.4 - IEEE Standard for Local and metropolitan area networks
|
|
* Integer representation is fixed most-significant-octet-first order and
|
|
* the representation of octets is most-significant-bit-first order. This is
|
|
* consistent with RFC 3610.
|
|
*/
|
|
/*
|
|
* Copyright The Mbed TLS Contributors
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
* not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef MBEDTLS_CCM_H
|
|
#define MBEDTLS_CCM_H
|
|
|
|
#if !defined(MBEDTLS_CONFIG_FILE)
|
|
#include "mbedtls/config.h"
|
|
#else
|
|
#include MBEDTLS_CONFIG_FILE
|
|
#endif
|
|
|
|
#include "mbedtls/cipher.h"
|
|
|
|
#define MBEDTLS_ERR_CCM_BAD_INPUT -0x000D /**< Bad input parameters to the function. */
|
|
#define MBEDTLS_ERR_CCM_AUTH_FAILED -0x000F /**< Authenticated decryption failed. */
|
|
|
|
/* MBEDTLS_ERR_CCM_HW_ACCEL_FAILED is deprecated and should not be used. */
|
|
#define MBEDTLS_ERR_CCM_HW_ACCEL_FAILED -0x0011 /**< CCM hardware accelerator failed. */
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#if !defined(MBEDTLS_CCM_ALT)
|
|
// Regular implementation
|
|
//
|
|
|
|
/**
|
|
* \brief The CCM context-type definition. The CCM context is passed
|
|
* to the APIs called.
|
|
*/
|
|
typedef struct mbedtls_ccm_context
|
|
{
|
|
mbedtls_cipher_context_t cipher_ctx; /*!< The cipher context used. */
|
|
}
|
|
mbedtls_ccm_context;
|
|
|
|
#else /* MBEDTLS_CCM_ALT */
|
|
#include "ccm_alt.h"
|
|
#endif /* MBEDTLS_CCM_ALT */
|
|
|
|
/**
|
|
* \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.
|
|
*/
|
|
void mbedtls_ccm_init( mbedtls_ccm_context *ctx );
|
|
|
|
/**
|
|
* \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.
|
|
*/
|
|
int mbedtls_ccm_setkey( mbedtls_ccm_context *ctx,
|
|
mbedtls_cipher_id_t cipher,
|
|
const unsigned char *key,
|
|
unsigned int keybits );
|
|
|
|
/**
|
|
* \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.
|
|
*/
|
|
void mbedtls_ccm_free( mbedtls_ccm_context *ctx );
|
|
|
|
/**
|
|
* \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 <em>RFC-3610:
|
|
* Counter with CBC-MAC (CCM)</em>, 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
|
|
* writable 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_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 <em>RFC-3610:
|
|
* Counter with CBC-MAC (CCM)</em>, 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
|
|
* writable 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_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 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_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_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 );
|
|
|
|
#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
|
|
/**
|
|
* \brief The CCM checkup routine.
|
|
*
|
|
* \return \c 0 on success.
|
|
* \return \c 1 on failure.
|
|
*/
|
|
int mbedtls_ccm_self_test( int verbose );
|
|
#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* MBEDTLS_CCM_H */
|