+++ /dev/null
-/**
- * \file cipher.h
- *
- * \brief Generic cipher wrapper.
- *
- * \author Adriaan de Jong <dejong@fox-it.com>
- *
- * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
- * SPDX-License-Identifier: GPL-2.0
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * This file is part of mbed TLS (https://tls.mbed.org)
- */
-
-#ifndef MBEDTLS_CIPHER_H
-#define MBEDTLS_CIPHER_H
-
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-#include <stddef.h>
-
-#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CCM_C)
-#define MBEDTLS_CIPHER_MODE_AEAD
-#endif
-
-#if defined(MBEDTLS_CIPHER_MODE_CBC)
-#define MBEDTLS_CIPHER_MODE_WITH_PADDING
-#endif
-
-#if defined(MBEDTLS_ARC4_C)
-#define MBEDTLS_CIPHER_MODE_STREAM
-#endif
-
-#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
- !defined(inline) && !defined(__cplusplus)
-#define inline __inline
-#endif
-
-#define MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE -0x6080 /**< The selected feature is not available. */
-#define MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA -0x6100 /**< Bad input parameters to function. */
-#define MBEDTLS_ERR_CIPHER_ALLOC_FAILED -0x6180 /**< Failed to allocate memory. */
-#define MBEDTLS_ERR_CIPHER_INVALID_PADDING -0x6200 /**< Input data contains invalid padding and is rejected. */
-#define MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED -0x6280 /**< Decryption of block requires a full block. */
-#define MBEDTLS_ERR_CIPHER_AUTH_FAILED -0x6300 /**< Authentication failed (for AEAD modes). */
-#define MBEDTLS_ERR_CIPHER_INVALID_CONTEXT -0x6380 /**< The context is invalid, eg because it was free()ed. */
-
-#define MBEDTLS_CIPHER_VARIABLE_IV_LEN 0x01 /**< Cipher accepts IVs of variable length */
-#define MBEDTLS_CIPHER_VARIABLE_KEY_LEN 0x02 /**< Cipher accepts keys of variable length */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef enum {
- MBEDTLS_CIPHER_ID_NONE = 0,
- MBEDTLS_CIPHER_ID_NULL,
- MBEDTLS_CIPHER_ID_AES,
- MBEDTLS_CIPHER_ID_DES,
- MBEDTLS_CIPHER_ID_3DES,
- MBEDTLS_CIPHER_ID_CAMELLIA,
- MBEDTLS_CIPHER_ID_BLOWFISH,
- MBEDTLS_CIPHER_ID_ARC4,
-} mbedtls_cipher_id_t;
-
-typedef enum {
- MBEDTLS_CIPHER_NONE = 0,
- MBEDTLS_CIPHER_NULL,
- MBEDTLS_CIPHER_AES_128_ECB,
- MBEDTLS_CIPHER_AES_192_ECB,
- MBEDTLS_CIPHER_AES_256_ECB,
- MBEDTLS_CIPHER_AES_128_CBC,
- MBEDTLS_CIPHER_AES_192_CBC,
- MBEDTLS_CIPHER_AES_256_CBC,
- MBEDTLS_CIPHER_AES_128_CFB128,
- MBEDTLS_CIPHER_AES_192_CFB128,
- MBEDTLS_CIPHER_AES_256_CFB128,
- MBEDTLS_CIPHER_AES_128_CTR,
- MBEDTLS_CIPHER_AES_192_CTR,
- MBEDTLS_CIPHER_AES_256_CTR,
- MBEDTLS_CIPHER_AES_128_GCM,
- MBEDTLS_CIPHER_AES_192_GCM,
- MBEDTLS_CIPHER_AES_256_GCM,
- MBEDTLS_CIPHER_CAMELLIA_128_ECB,
- MBEDTLS_CIPHER_CAMELLIA_192_ECB,
- MBEDTLS_CIPHER_CAMELLIA_256_ECB,
- MBEDTLS_CIPHER_CAMELLIA_128_CBC,
- MBEDTLS_CIPHER_CAMELLIA_192_CBC,
- MBEDTLS_CIPHER_CAMELLIA_256_CBC,
- MBEDTLS_CIPHER_CAMELLIA_128_CFB128,
- MBEDTLS_CIPHER_CAMELLIA_192_CFB128,
- MBEDTLS_CIPHER_CAMELLIA_256_CFB128,
- MBEDTLS_CIPHER_CAMELLIA_128_CTR,
- MBEDTLS_CIPHER_CAMELLIA_192_CTR,
- MBEDTLS_CIPHER_CAMELLIA_256_CTR,
- MBEDTLS_CIPHER_CAMELLIA_128_GCM,
- MBEDTLS_CIPHER_CAMELLIA_192_GCM,
- MBEDTLS_CIPHER_CAMELLIA_256_GCM,
- MBEDTLS_CIPHER_DES_ECB,
- MBEDTLS_CIPHER_DES_CBC,
- MBEDTLS_CIPHER_DES_EDE_ECB,
- MBEDTLS_CIPHER_DES_EDE_CBC,
- MBEDTLS_CIPHER_DES_EDE3_ECB,
- MBEDTLS_CIPHER_DES_EDE3_CBC,
- MBEDTLS_CIPHER_BLOWFISH_ECB,
- MBEDTLS_CIPHER_BLOWFISH_CBC,
- MBEDTLS_CIPHER_BLOWFISH_CFB64,
- MBEDTLS_CIPHER_BLOWFISH_CTR,
- MBEDTLS_CIPHER_ARC4_128,
- MBEDTLS_CIPHER_AES_128_CCM,
- MBEDTLS_CIPHER_AES_192_CCM,
- MBEDTLS_CIPHER_AES_256_CCM,
- MBEDTLS_CIPHER_CAMELLIA_128_CCM,
- MBEDTLS_CIPHER_CAMELLIA_192_CCM,
- MBEDTLS_CIPHER_CAMELLIA_256_CCM,
-} mbedtls_cipher_type_t;
-
-typedef enum {
- MBEDTLS_MODE_NONE = 0,
- MBEDTLS_MODE_ECB,
- MBEDTLS_MODE_CBC,
- MBEDTLS_MODE_CFB,
- MBEDTLS_MODE_OFB, /* Unused! */
- MBEDTLS_MODE_CTR,
- MBEDTLS_MODE_GCM,
- MBEDTLS_MODE_STREAM,
- MBEDTLS_MODE_CCM,
-} mbedtls_cipher_mode_t;
-
-typedef enum {
- MBEDTLS_PADDING_PKCS7 = 0, /**< PKCS7 padding (default) */
- MBEDTLS_PADDING_ONE_AND_ZEROS, /**< ISO/IEC 7816-4 padding */
- MBEDTLS_PADDING_ZEROS_AND_LEN, /**< ANSI X.923 padding */
- MBEDTLS_PADDING_ZEROS, /**< zero padding (not reversible!) */
- MBEDTLS_PADDING_NONE, /**< never pad (full blocks only) */
-} mbedtls_cipher_padding_t;
-
-typedef enum {
- MBEDTLS_OPERATION_NONE = -1,
- MBEDTLS_DECRYPT = 0,
- MBEDTLS_ENCRYPT,
-} mbedtls_operation_t;
-
-enum {
- /** Undefined key length */
- MBEDTLS_KEY_LENGTH_NONE = 0,
- /** Key length, in bits (including parity), for DES keys */
- MBEDTLS_KEY_LENGTH_DES = 64,
- /** Key length, in bits (including parity), for DES in two key EDE */
- MBEDTLS_KEY_LENGTH_DES_EDE = 128,
- /** Key length, in bits (including parity), for DES in three-key EDE */
- MBEDTLS_KEY_LENGTH_DES_EDE3 = 192,
-};
-
-/** Maximum length of any IV, in bytes */
-#define MBEDTLS_MAX_IV_LENGTH 16
-/** Maximum block size of any cipher, in bytes */
-#define MBEDTLS_MAX_BLOCK_LENGTH 16
-
-/**
- * Base cipher information (opaque struct).
- */
-typedef struct mbedtls_cipher_base_t mbedtls_cipher_base_t;
-
-/**
- * CMAC context (opaque struct).
- */
-typedef struct mbedtls_cmac_context_t mbedtls_cmac_context_t;
-
-/**
- * Cipher information. Allows cipher functions to be called in a generic way.
- */
-typedef struct {
- /** Full cipher identifier (e.g. MBEDTLS_CIPHER_AES_256_CBC) */
- mbedtls_cipher_type_t type;
-
- /** Cipher mode (e.g. MBEDTLS_MODE_CBC) */
- mbedtls_cipher_mode_t mode;
-
- /** Cipher key length, in bits (default length for variable sized ciphers)
- * (Includes parity bits for ciphers like DES) */
- unsigned int key_bitlen;
-
- /** Name of the cipher */
- const char * name;
-
- /** IV/NONCE size, in bytes.
- * For cipher that accept many sizes: recommended size */
- unsigned int iv_size;
-
- /** Flags for variable IV size, variable key size, etc. */
- int flags;
-
- /** block size, in bytes */
- unsigned int block_size;
-
- /** Base cipher information and functions */
- const mbedtls_cipher_base_t *base;
-
-} mbedtls_cipher_info_t;
-
-/**
- * Generic cipher context.
- */
-typedef struct {
- /** Information about the associated cipher */
- const mbedtls_cipher_info_t *cipher_info;
-
- /** Key length to use */
- int key_bitlen;
-
- /** Operation that the context's key has been initialised for */
- mbedtls_operation_t operation;
-
-#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
- /** Padding functions to use, if relevant for cipher mode */
- void (*add_padding)( unsigned char *output, size_t olen, size_t data_len );
- int (*get_padding)( unsigned char *input, size_t ilen, size_t *data_len );
-#endif
-
- /** Buffer for data that hasn't been encrypted yet */
- unsigned char unprocessed_data[MBEDTLS_MAX_BLOCK_LENGTH];
-
- /** Number of bytes that still need processing */
- size_t unprocessed_len;
-
- /** Current IV or NONCE_COUNTER for CTR-mode */
- unsigned char iv[MBEDTLS_MAX_IV_LENGTH];
-
- /** IV size in bytes (for ciphers with variable-length IVs) */
- size_t iv_size;
-
- /** Cipher-specific context */
- void *cipher_ctx;
-
-#if defined(MBEDTLS_CMAC_C)
- /** CMAC Specific context */
- mbedtls_cmac_context_t *cmac_ctx;
-#endif
-} mbedtls_cipher_context_t;
-
-/**
- * \brief Returns the list of ciphers supported by the generic cipher module.
- *
- * \return a statically allocated array of ciphers, the last entry
- * is 0.
- */
-const int *mbedtls_cipher_list( void );
-
-/**
- * \brief Returns the cipher information structure associated
- * with the given cipher name.
- *
- * \param cipher_name Name of the cipher to search for.
- *
- * \return the cipher information structure associated with the
- * given cipher_name, or NULL if not found.
- */
-const mbedtls_cipher_info_t *mbedtls_cipher_info_from_string( const char *cipher_name );
-
-/**
- * \brief Returns the cipher information structure associated
- * with the given cipher type.
- *
- * \param cipher_type Type of the cipher to search for.
- *
- * \return the cipher information structure associated with the
- * given cipher_type, or NULL if not found.
- */
-const mbedtls_cipher_info_t *mbedtls_cipher_info_from_type( const mbedtls_cipher_type_t cipher_type );
-
-/**
- * \brief Returns the cipher information structure associated
- * with the given cipher id, key size and mode.
- *
- * \param cipher_id Id of the cipher to search for
- * (e.g. MBEDTLS_CIPHER_ID_AES)
- * \param key_bitlen Length of the key in bits
- * \param mode Cipher mode (e.g. MBEDTLS_MODE_CBC)
- *
- * \return the cipher information structure associated with the
- * given cipher_type, or NULL if not found.
- */
-const mbedtls_cipher_info_t *mbedtls_cipher_info_from_values( const mbedtls_cipher_id_t cipher_id,
- int key_bitlen,
- const mbedtls_cipher_mode_t mode );
-
-/**
- * \brief Initialize a cipher_context (as NONE)
- */
-void mbedtls_cipher_init( mbedtls_cipher_context_t *ctx );
-
-/**
- * \brief Free and clear the cipher-specific context of ctx.
- * Freeing ctx itself remains the responsibility of the
- * caller.
- */
-void mbedtls_cipher_free( mbedtls_cipher_context_t *ctx );
-
-/**
- * \brief Initialises and fills the cipher context structure with
- * the appropriate values.
- *
- * \note Currently also clears structure. In future versions you
- * will be required to call mbedtls_cipher_init() on the structure
- * first.
- *
- * \param ctx context to initialise. May not be NULL.
- * \param cipher_info cipher to use.
- *
- * \return 0 on success,
- * MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on parameter failure,
- * MBEDTLS_ERR_CIPHER_ALLOC_FAILED if allocation of the
- * cipher-specific context failed.
- */
-int mbedtls_cipher_setup( mbedtls_cipher_context_t *ctx, const mbedtls_cipher_info_t *cipher_info );
-
-/**
- * \brief Returns the block size of the given cipher.
- *
- * \param ctx cipher's context. Must have been initialised.
- *
- * \return size of the cipher's blocks, or 0 if ctx has not been
- * initialised.
- */
-static inline unsigned int mbedtls_cipher_get_block_size( const mbedtls_cipher_context_t *ctx )
-{
- if( NULL == ctx || NULL == ctx->cipher_info )
- return 0;
-
- return ctx->cipher_info->block_size;
-}
-
-/**
- * \brief Returns the mode of operation for the cipher.
- * (e.g. MBEDTLS_MODE_CBC)
- *
- * \param ctx cipher's context. Must have been initialised.
- *
- * \return mode of operation, or MBEDTLS_MODE_NONE if ctx
- * has not been initialised.
- */
-static inline mbedtls_cipher_mode_t mbedtls_cipher_get_cipher_mode( const mbedtls_cipher_context_t *ctx )
-{
- if( NULL == ctx || NULL == ctx->cipher_info )
- return MBEDTLS_MODE_NONE;
-
- return ctx->cipher_info->mode;
-}
-
-/**
- * \brief Returns the size of the cipher's IV/NONCE in bytes.
- *
- * \param ctx cipher's context. Must have been initialised.
- *
- * \return If IV has not been set yet: (recommended) IV size
- * (0 for ciphers not using IV/NONCE).
- * If IV has already been set: actual size.
- */
-static inline int mbedtls_cipher_get_iv_size( const mbedtls_cipher_context_t *ctx )
-{
- if( NULL == ctx || NULL == ctx->cipher_info )
- return 0;
-
- if( ctx->iv_size != 0 )
- return (int) ctx->iv_size;
-
- return (int) ctx->cipher_info->iv_size;
-}
-
-/**
- * \brief Returns the type of the given cipher.
- *
- * \param ctx cipher's context. Must have been initialised.
- *
- * \return type of the cipher, or MBEDTLS_CIPHER_NONE if ctx has
- * not been initialised.
- */
-static inline mbedtls_cipher_type_t mbedtls_cipher_get_type( const mbedtls_cipher_context_t *ctx )
-{
- if( NULL == ctx || NULL == ctx->cipher_info )
- return MBEDTLS_CIPHER_NONE;
-
- return ctx->cipher_info->type;
-}
-
-/**
- * \brief Returns the name of the given cipher, as a string.
- *
- * \param ctx cipher's context. Must have been initialised.
- *
- * \return name of the cipher, or NULL if ctx was not initialised.
- */
-static inline const char *mbedtls_cipher_get_name( const mbedtls_cipher_context_t *ctx )
-{
- if( NULL == ctx || NULL == ctx->cipher_info )
- return 0;
-
- return ctx->cipher_info->name;
-}
-
-/**
- * \brief Returns the key length of the cipher.
- *
- * \param ctx cipher's context. Must have been initialised.
- *
- * \return cipher's key length, in bits, or
- * MBEDTLS_KEY_LENGTH_NONE if ctx has not been
- * initialised.
- */
-static inline int mbedtls_cipher_get_key_bitlen( const mbedtls_cipher_context_t *ctx )
-{
- if( NULL == ctx || NULL == ctx->cipher_info )
- return MBEDTLS_KEY_LENGTH_NONE;
-
- return (int) ctx->cipher_info->key_bitlen;
-}
-
-/**
- * \brief Returns the operation of the given cipher.
- *
- * \param ctx cipher's context. Must have been initialised.
- *
- * \return operation (MBEDTLS_ENCRYPT or MBEDTLS_DECRYPT),
- * or MBEDTLS_OPERATION_NONE if ctx has not been
- * initialised.
- */
-static inline mbedtls_operation_t mbedtls_cipher_get_operation( const mbedtls_cipher_context_t *ctx )
-{
- if( NULL == ctx || NULL == ctx->cipher_info )
- return MBEDTLS_OPERATION_NONE;
-
- return ctx->operation;
-}
-
-/**
- * \brief Set the key to use with the given context.
- *
- * \param ctx generic cipher context. May not be NULL. Must have been
- * initialised using cipher_context_from_type or
- * cipher_context_from_string.
- * \param key The key to use.
- * \param key_bitlen key length to use, in bits.
- * \param operation Operation that the key will be used for, either
- * MBEDTLS_ENCRYPT or MBEDTLS_DECRYPT.
- *
- * \returns 0 on success, MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA if
- * parameter verification fails or a cipher specific
- * error code.
- */
-int mbedtls_cipher_setkey( mbedtls_cipher_context_t *ctx, const unsigned char *key,
- int key_bitlen, const mbedtls_operation_t operation );
-
-#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
-/**
- * \brief Set padding mode, for cipher modes that use padding.
- * (Default: PKCS7 padding.)
- *
- * \param ctx generic cipher context
- * \param mode padding mode
- *
- * \returns 0 on success, MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE
- * if selected padding mode is not supported, or
- * MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA if the cipher mode
- * does not support padding.
- */
-int mbedtls_cipher_set_padding_mode( mbedtls_cipher_context_t *ctx, mbedtls_cipher_padding_t mode );
-#endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
-
-/**
- * \brief Set the initialization vector (IV) or nonce
- *
- * \param ctx generic cipher context
- * \param iv IV to use (or NONCE_COUNTER for CTR-mode ciphers)
- * \param iv_len IV length for ciphers with variable-size IV;
- * discarded by ciphers with fixed-size IV.
- *
- * \returns 0 on success, or MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA
- *
- * \note Some ciphers don't use IVs nor NONCE. For these
- * ciphers, this function has no effect.
- */
-int mbedtls_cipher_set_iv( mbedtls_cipher_context_t *ctx,
- const unsigned char *iv, size_t iv_len );
-
-/**
- * \brief Finish preparation of the given context
- *
- * \param ctx generic cipher context
- *
- * \returns 0 on success, MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA
- * if parameter verification fails.
- */
-int mbedtls_cipher_reset( mbedtls_cipher_context_t *ctx );
-
-#if defined(MBEDTLS_GCM_C)
-/**
- * \brief Add additional data (for AEAD ciphers).
- * Currently only supported with GCM.
- * Must be called exactly once, after mbedtls_cipher_reset().
- *
- * \param ctx generic cipher context
- * \param ad Additional data to use.
- * \param ad_len Length of ad.
- *
- * \return 0 on success, or a specific error code.
- */
-int mbedtls_cipher_update_ad( mbedtls_cipher_context_t *ctx,
- const unsigned char *ad, size_t ad_len );
-#endif /* MBEDTLS_GCM_C */
-
-/**
- * \brief Generic cipher update function. Encrypts/decrypts
- * using the given cipher context. Writes as many block
- * size'd blocks of data as possible to output. Any data
- * that cannot be written immediately will either be added
- * to the next block, or flushed when cipher_final is
- * called.
- * Exception: for MBEDTLS_MODE_ECB, expects single block
- * in size (e.g. 16 bytes for AES)
- *
- * \param ctx generic cipher context
- * \param input buffer holding the input data
- * \param ilen length of the input data
- * \param output buffer for the output data. Should be able to hold at
- * least ilen + block_size. Cannot be the same buffer as
- * input!
- * \param olen length of the output data, will be filled with the
- * actual number of bytes written.
- *
- * \returns 0 on success, MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA if
- * parameter verification fails,
- * MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE on an
- * unsupported mode for a cipher or a cipher specific
- * error code.
- *
- * \note If the underlying cipher is GCM, all calls to this
- * function, except the last one before mbedtls_cipher_finish(),
- * must have ilen a multiple of the block size.
- */
-int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *input,
- size_t ilen, unsigned char *output, size_t *olen );
-
-/**
- * \brief Generic cipher finalisation function. If data still
- * needs to be flushed from an incomplete block, data
- * contained within it will be padded with the size of
- * the last block, and written to the output buffer.
- *
- * \param ctx Generic cipher context
- * \param output buffer to write data to. Needs block_size available.
- * \param olen length of the data written to the output buffer.
- *
- * \returns 0 on success, MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA if
- * parameter verification fails,
- * MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED if decryption
- * expected a full block but was not provided one,
- * MBEDTLS_ERR_CIPHER_INVALID_PADDING on invalid padding
- * while decrypting or a cipher specific error code.
- */
-int mbedtls_cipher_finish( mbedtls_cipher_context_t *ctx,
- unsigned char *output, size_t *olen );
-
-#if defined(MBEDTLS_GCM_C)
-/**
- * \brief Write tag for AEAD ciphers.
- * Currently only supported with GCM.
- * Must be called after mbedtls_cipher_finish().
- *
- * \param ctx Generic cipher context
- * \param tag buffer to write the tag
- * \param tag_len Length of the tag to write
- *
- * \return 0 on success, or a specific error code.
- */
-int mbedtls_cipher_write_tag( mbedtls_cipher_context_t *ctx,
- unsigned char *tag, size_t tag_len );
-
-/**
- * \brief Check tag for AEAD ciphers.
- * Currently only supported with GCM.
- * Must be called after mbedtls_cipher_finish().
- *
- * \param ctx Generic cipher context
- * \param tag Buffer holding the tag
- * \param tag_len Length of the tag to check
- *
- * \return 0 on success, or a specific error code.
- */
-int mbedtls_cipher_check_tag( mbedtls_cipher_context_t *ctx,
- const unsigned char *tag, size_t tag_len );
-#endif /* MBEDTLS_GCM_C */
-
-/**
- * \brief Generic all-in-one encryption/decryption
- * (for all ciphers except AEAD constructs).
- *
- * \param ctx generic cipher context
- * \param iv IV to use (or NONCE_COUNTER for CTR-mode ciphers)
- * \param iv_len IV length for ciphers with variable-size IV;
- * discarded by ciphers with fixed-size IV.
- * \param input buffer holding the input data
- * \param ilen length of the input data
- * \param output buffer for the output data. Should be able to hold at
- * least ilen + block_size. Cannot be the same buffer as
- * input!
- * \param olen length of the output data, will be filled with the
- * actual number of bytes written.
- *
- * \note Some ciphers don't use IVs nor NONCE. For these
- * ciphers, use iv = NULL and iv_len = 0.
- *
- * \returns 0 on success, or
- * MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA, or
- * MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED if decryption
- * expected a full block but was not provided one, or
- * MBEDTLS_ERR_CIPHER_INVALID_PADDING on invalid padding
- * while decrypting, or
- * a cipher specific error code.
- */
-int mbedtls_cipher_crypt( mbedtls_cipher_context_t *ctx,
- const unsigned char *iv, size_t iv_len,
- const unsigned char *input, size_t ilen,
- unsigned char *output, size_t *olen );
-
-#if defined(MBEDTLS_CIPHER_MODE_AEAD)
-/**
- * \brief Generic autenticated encryption (AEAD ciphers).
- *
- * \param ctx generic cipher context
- * \param iv IV to use (or NONCE_COUNTER for CTR-mode ciphers)
- * \param iv_len IV length for ciphers with variable-size IV;
- * discarded by ciphers with fixed-size IV.
- * \param ad Additional data to authenticate.
- * \param ad_len Length of ad.
- * \param input buffer holding the input data
- * \param ilen length of the input data
- * \param output buffer for the output data.
- * Should be able to hold at least ilen.
- * \param olen length of the output data, will be filled with the
- * actual number of bytes written.
- * \param tag buffer for the authentication tag
- * \param tag_len desired tag length
- *
- * \returns 0 on success, or
- * MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA, or
- * a cipher specific error code.
- */
-int mbedtls_cipher_auth_encrypt( mbedtls_cipher_context_t *ctx,
- const unsigned char *iv, size_t iv_len,
- const unsigned char *ad, size_t ad_len,
- const unsigned char *input, size_t ilen,
- unsigned char *output, size_t *olen,
- unsigned char *tag, size_t tag_len );
-
-/**
- * \brief Generic autenticated decryption (AEAD ciphers).
- *
- * \param ctx generic cipher context
- * \param iv IV to use (or NONCE_COUNTER for CTR-mode ciphers)
- * \param iv_len IV length for ciphers with variable-size IV;
- * discarded by ciphers with fixed-size IV.
- * \param ad Additional data to be authenticated.
- * \param ad_len Length of ad.
- * \param input buffer holding the input data
- * \param ilen length of the input data
- * \param output buffer for the output data.
- * Should be able to hold at least ilen.
- * \param olen length of the output data, will be filled with the
- * actual number of bytes written.
- * \param tag buffer holding the authentication tag
- * \param tag_len length of the authentication tag
- *
- * \returns 0 on success, or
- * MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA, or
- * MBEDTLS_ERR_CIPHER_AUTH_FAILED if data isn't authentic,
- * or a cipher specific error code.
- *
- * \note If the data is not authentic, then the output buffer
- * is zeroed out to prevent the unauthentic plaintext to
- * be used by mistake, making this interface safer.
- */
-int mbedtls_cipher_auth_decrypt( mbedtls_cipher_context_t *ctx,
- const unsigned char *iv, size_t iv_len,
- const unsigned char *ad, size_t ad_len,
- const unsigned char *input, size_t ilen,
- unsigned char *output, size_t *olen,
- const unsigned char *tag, size_t tag_len );
-#endif /* MBEDTLS_CIPHER_MODE_AEAD */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* MBEDTLS_CIPHER_H */
projects / reactos.git / blobdiff