#include "config.h"
#include "config.h"
#include MBEDTLS_CONFIG_FILE
#include MBEDTLS_CONFIG_FILE
#include <stddef.h>
#include
#include "platform_util.h"
#include "platform_util.h"
#define MBEDTLS_CIPHER_H
#define MBEDTLS_CIPHER_MODE_AEAD
#define MBEDTLS_CIPHER_MODE_WITH_PADDING
#define MBEDTLS_CIPHER_MODE_STREAM
#define inline __inline
#define MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE -24704 /**< The selected feature is not available. */
#define MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA -24832 /**< Bad input parameters. */
#define MBEDTLS_ERR_CIPHER_ALLOC_FAILED -24960 /**< Failed to allocate memory. */
#define MBEDTLS_ERR_CIPHER_INVALID_PADDING -25088 /**< Input data contains invalid padding and is rejected. */
#define MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED -25216 /**< Decryption of block requires a full block. */
#define MBEDTLS_ERR_CIPHER_AUTH_FAILED -25344 /**< Authentication failed (for AEAD modes). */
#define MBEDTLS_ERR_CIPHER_INVALID_CONTEXT -25472 /**< The context is invalid. For example, because it was freed. */
#define MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED -25600 /**< Cipher hardware accelerator failed. */
/* MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED is deprecated and should not be used. */
#define MBEDTLS_CIPHER_VARIABLE_IV_LEN 1 /**< Cipher accepts IVs of variable length. */
#define MBEDTLS_CIPHER_VARIABLE_KEY_LEN 2 /**< Cipher accepts keys of variable length. */
#define MBEDTLS_MAX_IV_LENGTH 16
/** Maximum length of any IV, in Bytes. */
#define MBEDTLS_MAX_BLOCK_LENGTH 16
/** Maximum block size of any cipher, in Bytes. */
void mbedtls_cipher_init( mbedtls_cipher_context_t *ctx );
/** * \brief This function initializes a \p cipher_context as NONE. * * \param ctx The context to be initialized. This must not be \c NULL. */
void mbedtls_cipher_free( mbedtls_cipher_context_t *ctx );
/** * \brief This function frees and clears the cipher-specific * context of \p ctx. Freeing \p ctx itself remains the * responsibility of the caller. * * \param ctx The context to be freed. If this is \c NULL, the * function has no effect, otherwise this must point to an * initialized context. */
int mbedtls_cipher_setup( mbedtls_cipher_context_t *ctx,
const mbedtls_cipher_info_t *cipher_info );
/** * \brief This function initializes and fills the cipher-context * structure with the appropriate values. It also clears * the structure. * * \param ctx The context to initialize. This must be initialized. * \param cipher_info The cipher to use. * * \return \c 0 on success. * \return #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on * parameter-verification failure. * \return #MBEDTLS_ERR_CIPHER_ALLOC_FAILED if allocation of the * cipher-specific context fails. * * \internal Currently, the function also clears the structure. * In future versions, the caller will be required to call * mbedtls_cipher_init() on the structure first. */
int mbedtls_cipher_setkey( mbedtls_cipher_context_t *ctx,
const unsigned char *key,
int key_bitlen,
const mbedtls_operation_t operation );
/** * \brief This function sets the key to use with the given context. * * \param ctx The generic cipher context. This must be initialized and * bound to a cipher information structure. * \param key The key to use. This must be a readable buffer of at * least \p key_bitlen Bits. * \param key_bitlen The key length to use, in Bits. * \param operation The operation that the key will be used for: * #MBEDTLS_ENCRYPT or #MBEDTLS_DECRYPT. * * \return \c 0 on success. * \return #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on * parameter-verification failure. * \return A cipher-specific error code on failure. */
int mbedtls_cipher_set_padding_mode( mbedtls_cipher_context_t *ctx,
mbedtls_cipher_padding_t mode );
/** * \brief This function sets the padding mode, for cipher modes * that use padding. * * The default passing mode is PKCS7 padding. * * \param ctx The generic cipher context. This must be initialized and * bound to a cipher information structure. * \param mode The padding mode. * * \return \c 0 on success. * \return #MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE * if the selected padding mode is not supported. * \return #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA if the cipher mode * does not support padding. */
int mbedtls_cipher_set_iv( mbedtls_cipher_context_t *ctx,
const unsigned char *iv,
size_t iv_len );
/** * \brief This function sets the initialization vector (IV) * or nonce. * * \note Some ciphers do not use IVs nor nonce. For these * ciphers, this function has no effect. * * \param ctx The generic cipher context. This must be initialized and * bound to a cipher information structure. * \param iv The IV to use, or NONCE_COUNTER for CTR-mode ciphers. This * must be a readable buffer of at least \p iv_len Bytes. * \param iv_len The IV length for ciphers with variable-size IV. * This parameter is discarded by ciphers with fixed-size IV. * * \return \c 0 on success. * \return #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on * parameter-verification failure. */
int mbedtls_cipher_reset( mbedtls_cipher_context_t *ctx );
/** * \brief This function resets the cipher state. * * \param ctx The generic cipher context. This must be initialized. * * \return \c 0 on success. * \return #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on * parameter-verification failure. */
int mbedtls_cipher_update_ad( mbedtls_cipher_context_t *ctx,
const unsigned char *ad, size_t ad_len );
/** * \brief This function adds additional data for AEAD ciphers. * Currently supported with GCM and ChaCha20+Poly1305. * This must be called exactly once, after * mbedtls_cipher_reset(). * * \param ctx The generic cipher context. This must be initialized. * \param ad The additional data to use. This must be a readable * buffer of at least \p ad_len Bytes. * \param ad_len the Length of \p ad Bytes. * * \return \c 0 on success. * \return A specific error code on failure. */
int mbedtls_cipher_update( mbedtls_cipher_context_t *ctx, const unsigned char *input,
size_t ilen, unsigned char *output, size_t *olen );
/** * \brief The generic cipher update function. It encrypts or * decrypts using the given cipher context. Writes as * many block-sized blocks of data as possible to output. * Any data that cannot be written immediately is either * added to the next block, or flushed when * mbedtls_cipher_finish() is called. * Exception: For MBEDTLS_MODE_ECB, expects a single block * in size. For example, 16 Bytes for AES. * * \note If the underlying cipher is used in GCM mode, all calls * to this function, except for the last one before * mbedtls_cipher_finish(), must have \p ilen as a * multiple of the block size of the cipher. * * \param ctx The generic cipher context. This must be initialized and * bound to a key. * \param input The buffer holding the input data. This must be a * readable buffer of at least \p ilen Bytes. * \param ilen The length of the input data. * \param output The buffer for the output data. This must be able to * hold at least `ilen + block_size`. This must not be the * same buffer as \p input. * \param olen The length of the output data, to be updated with the * actual number of Bytes written. This must not be * \c NULL. * * \return \c 0 on success. * \return #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on * parameter-verification failure. * \return #MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE on an * unsupported mode for a cipher. * \return A cipher-specific error code on failure. */
int mbedtls_cipher_finish( mbedtls_cipher_context_t *ctx,
unsigned char *output, size_t *olen );
/** * \brief The generic cipher finalization function. If data still * needs to be flushed from an incomplete block, the data * contained in it is padded to the size of * the last block, and written to the \p output buffer. * * \param ctx The generic cipher context. This must be initialized and * bound to a key. * \param output The buffer to write data to. This needs to be a writable * buffer of at least \p block_size Bytes. * \param olen The length of the data written to the \p output buffer. * This may not be \c NULL. * * \return \c 0 on success. * \return #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on * parameter-verification failure. * \return #MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED on decryption * expecting a full block but not receiving one. * \return #MBEDTLS_ERR_CIPHER_INVALID_PADDING on invalid padding * while decrypting. * \return A cipher-specific error code on failure. */
int mbedtls_cipher_write_tag( mbedtls_cipher_context_t *ctx,
unsigned char *tag, size_t tag_len );
/** * \brief This function writes a tag for AEAD ciphers. * Currently supported with GCM and ChaCha20+Poly1305. * This must be called after mbedtls_cipher_finish(). * * \param ctx The generic cipher context. This must be initialized, * bound to a key, and have just completed a cipher * operation through mbedtls_cipher_finish() the tag for * which should be written. * \param tag The buffer to write the tag to. This must be a writable * buffer of at least \p tag_len Bytes. * \param tag_len The length of the tag to write. * * \return \c 0 on success. * \return A specific error code on failure. */
int mbedtls_cipher_check_tag( mbedtls_cipher_context_t *ctx,
const unsigned char *tag, size_t tag_len );
/** * \brief This function checks the tag for AEAD ciphers. * Currently supported with GCM and ChaCha20+Poly1305. * This must be called after mbedtls_cipher_finish(). * * \param ctx The generic cipher context. This must be initialized. * \param tag The buffer holding the tag. This must be a readable * buffer of at least \p tag_len Bytes. * \param tag_len The length of the tag to check. * * \return \c 0 on success. * \return A specific error code on failure. */
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 );
/** * \brief The generic all-in-one encryption/decryption function, * for all ciphers except AEAD constructs. * * \param ctx The generic cipher context. This must be initialized. * \param iv The IV to use, or NONCE_COUNTER for CTR-mode ciphers. * This must be a readable buffer of at least \p iv_len * Bytes. * \param iv_len The IV length for ciphers with variable-size IV. * This parameter is discarded by ciphers with fixed-size * IV. * \param input The buffer holding the input data. This must be a * readable buffer of at least \p ilen Bytes. * \param ilen The length of the input data in Bytes. * \param output The buffer for the output data. This must be able to * hold at least `ilen + block_size`. This must not be the * same buffer as \p input. * \param olen The length of the output data, to be updated with the * actual number of Bytes written. This must not be * \c NULL. * * \note Some ciphers do not use IVs nor nonce. For these * ciphers, use \p iv = NULL and \p iv_len = 0. * * \return \c 0 on success. * \return #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on * parameter-verification failure. * \return #MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED on decryption * expecting a full block but not receiving one. * \return #MBEDTLS_ERR_CIPHER_INVALID_PADDING on invalid padding * while decrypting. * \return A cipher-specific error code on failure. */
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 The generic autenticated encryption (AEAD) function. * * \param ctx The generic cipher context. This must be initialized and * bound to a key. * \param iv The IV to use, or NONCE_COUNTER for CTR-mode ciphers. * This must be a readable buffer of at least \p iv_len * Bytes. * \param iv_len The IV length for ciphers with variable-size IV. * This parameter is discarded by ciphers with fixed-size IV. * \param ad The additional data to authenticate. This must be a * readable buffer of at least \p ad_len Bytes. * \param ad_len The length of \p ad. * \param input The buffer holding the input data. This must be a * readable buffer of at least \p ilen Bytes. * \param ilen The length of the input data. * \param output The buffer for the output data. This must be able to * hold at least \p ilen Bytes. * \param olen The length of the output data, to be updated with the * actual number of Bytes written. This must not be * \c NULL. * \param tag The buffer for the authentication tag. This must be a * writable buffer of at least \p tag_len Bytes. * \param tag_len The desired length of the authentication tag. * * \return \c 0 on success. * \return #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on * parameter-verification failure. * \return A cipher-specific error code on failure. */
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 );
/** * \brief The generic autenticated decryption (AEAD) function. * * \note If the data is not authentic, then the output buffer * is zeroed out to prevent the unauthentic plaintext being * used, making this interface safer. * * \param ctx The generic cipher context. This must be initialized and * and bound to a key. * \param iv The IV to use, or NONCE_COUNTER for CTR-mode ciphers. * This must be a readable buffer of at least \p iv_len * Bytes. * \param iv_len The IV length for ciphers with variable-size IV. * This parameter is discarded by ciphers with fixed-size IV. * \param ad The additional data to be authenticated. This must be a * readable buffer of at least \p ad_len Bytes. * \param ad_len The length of \p ad. * \param input The buffer holding the input data. This must be a * readable buffer of at least \p ilen Bytes. * \param ilen The length of the input data. * \param output The buffer for the output data. * This must be able to hold at least \p ilen Bytes. * \param olen The length of the output data, to be updated with the * actual number of Bytes written. This must not be * \c NULL. * \param tag The buffer holding the authentication tag. This must be * a readable buffer of at least \p tag_len Bytes. * \param tag_len The length of the authentication tag. * * \return \c 0 on success. * \return #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on * parameter-verification failure. * \return #MBEDTLS_ERR_CIPHER_AUTH_FAILED if data is not authentic. * \return A cipher-specific error code on failure. */
const int *mbedtls_cipher_list( void );
/** * \brief This function retrieves the list of ciphers supported by the generic * cipher module. * * \return A statically-allocated array of ciphers. The last entry * is zero. */
const mbedtls_cipher_info_t *mbedtls_cipher_info_from_string( const char *cipher_name );
/** * \brief This function retrieves the cipher-information * structure associated with the given cipher name. * * \param cipher_name Name of the cipher to search for. This must not be * \c NULL. * * \return The cipher information structure associated with the * given \p cipher_name. * \return \c NULL if the associated cipher information is not found. */
const mbedtls_cipher_info_t *mbedtls_cipher_info_from_type( const mbedtls_cipher_type_t cipher_type );
/** * \brief This function retrieves 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 \p cipher_type. * \return \c NULL if the associated cipher information is 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 This function retrieves the cipher-information * structure associated with the given cipher ID, * key size and mode. * * \param cipher_id The ID of the cipher to search for. For example, * #MBEDTLS_CIPHER_ID_AES. * \param key_bitlen The length of the key in bits. * \param mode The cipher mode. For example, #MBEDTLS_MODE_CBC. * * \return The cipher information structure associated with the * given \p cipher_id. * \return \c NULL if the associated cipher information is not found. */
typedef enum {
MBEDTLS_CIPHER_ID_NONE = 0, /**< Placeholder to mark the end of cipher ID lists. */
MBEDTLS_CIPHER_ID_NULL, /**< The identity cipher, treated as a stream cipher. */
MBEDTLS_CIPHER_ID_AES, /**< The AES cipher. */
MBEDTLS_CIPHER_ID_DES, /**< The DES cipher. */
MBEDTLS_CIPHER_ID_3DES, /**< The Triple DES cipher. */
MBEDTLS_CIPHER_ID_CAMELLIA, /**< The Camellia cipher. */
MBEDTLS_CIPHER_ID_BLOWFISH, /**< The Blowfish cipher. */
MBEDTLS_CIPHER_ID_ARC4, /**< The RC4 cipher. */
MBEDTLS_CIPHER_ID_ARIA, /**< The Aria cipher. */
MBEDTLS_CIPHER_ID_CHACHA20, /**< The ChaCha20 cipher. */
} mbedtls_cipher_id_t;
/** * \brief Supported cipher types. * * \warning RC4 and DES are considered weak ciphers and their use * constitutes a security risk. Arm recommends considering stronger * ciphers instead. */
typedef enum {
MBEDTLS_CIPHER_NONE = 0, /**< Placeholder to mark the end of cipher-pair lists. */
MBEDTLS_CIPHER_NULL, /**< The identity stream cipher. */
MBEDTLS_CIPHER_AES_128_ECB, /**< AES cipher with 128-bit ECB mode. */
MBEDTLS_CIPHER_AES_192_ECB, /**< AES cipher with 192-bit ECB mode. */
MBEDTLS_CIPHER_AES_256_ECB, /**< AES cipher with 256-bit ECB mode. */
MBEDTLS_CIPHER_AES_128_CBC, /**< AES cipher with 128-bit CBC mode. */
MBEDTLS_CIPHER_AES_192_CBC, /**< AES cipher with 192-bit CBC mode. */
MBEDTLS_CIPHER_AES_256_CBC, /**< AES cipher with 256-bit CBC mode. */
MBEDTLS_CIPHER_AES_128_CFB128, /**< AES cipher with 128-bit CFB128 mode. */
MBEDTLS_CIPHER_AES_192_CFB128, /**< AES cipher with 192-bit CFB128 mode. */
MBEDTLS_CIPHER_AES_256_CFB128, /**< AES cipher with 256-bit CFB128 mode. */
MBEDTLS_CIPHER_AES_128_CTR, /**< AES cipher with 128-bit CTR mode. */
MBEDTLS_CIPHER_AES_192_CTR, /**< AES cipher with 192-bit CTR mode. */
MBEDTLS_CIPHER_AES_256_CTR, /**< AES cipher with 256-bit CTR mode. */
MBEDTLS_CIPHER_AES_128_GCM, /**< AES cipher with 128-bit GCM mode. */
MBEDTLS_CIPHER_AES_192_GCM, /**< AES cipher with 192-bit GCM mode. */
MBEDTLS_CIPHER_AES_256_GCM, /**< AES cipher with 256-bit GCM mode. */
MBEDTLS_CIPHER_CAMELLIA_128_ECB, /**< Camellia cipher with 128-bit ECB mode. */
MBEDTLS_CIPHER_CAMELLIA_192_ECB, /**< Camellia cipher with 192-bit ECB mode. */
MBEDTLS_CIPHER_CAMELLIA_256_ECB, /**< Camellia cipher with 256-bit ECB mode. */
MBEDTLS_CIPHER_CAMELLIA_128_CBC, /**< Camellia cipher with 128-bit CBC mode. */
MBEDTLS_CIPHER_CAMELLIA_192_CBC, /**< Camellia cipher with 192-bit CBC mode. */
MBEDTLS_CIPHER_CAMELLIA_256_CBC, /**< Camellia cipher with 256-bit CBC mode. */
MBEDTLS_CIPHER_CAMELLIA_128_CFB128, /**< Camellia cipher with 128-bit CFB128 mode. */
MBEDTLS_CIPHER_CAMELLIA_192_CFB128, /**< Camellia cipher with 192-bit CFB128 mode. */
MBEDTLS_CIPHER_CAMELLIA_256_CFB128, /**< Camellia cipher with 256-bit CFB128 mode. */
MBEDTLS_CIPHER_CAMELLIA_128_CTR, /**< Camellia cipher with 128-bit CTR mode. */
MBEDTLS_CIPHER_CAMELLIA_192_CTR, /**< Camellia cipher with 192-bit CTR mode. */
MBEDTLS_CIPHER_CAMELLIA_256_CTR, /**< Camellia cipher with 256-bit CTR mode. */
MBEDTLS_CIPHER_CAMELLIA_128_GCM, /**< Camellia cipher with 128-bit GCM mode. */
MBEDTLS_CIPHER_CAMELLIA_192_GCM, /**< Camellia cipher with 192-bit GCM mode. */
MBEDTLS_CIPHER_CAMELLIA_256_GCM, /**< Camellia cipher with 256-bit GCM mode. */
MBEDTLS_CIPHER_DES_ECB, /**< DES cipher with ECB mode. */
MBEDTLS_CIPHER_DES_CBC, /**< DES cipher with CBC mode. */
MBEDTLS_CIPHER_DES_EDE_ECB, /**< DES cipher with EDE ECB mode. */
MBEDTLS_CIPHER_DES_EDE_CBC, /**< DES cipher with EDE CBC mode. */
MBEDTLS_CIPHER_DES_EDE3_ECB, /**< DES cipher with EDE3 ECB mode. */
MBEDTLS_CIPHER_DES_EDE3_CBC, /**< DES cipher with EDE3 CBC mode. */
MBEDTLS_CIPHER_BLOWFISH_ECB, /**< Blowfish cipher with ECB mode. */
MBEDTLS_CIPHER_BLOWFISH_CBC, /**< Blowfish cipher with CBC mode. */
MBEDTLS_CIPHER_BLOWFISH_CFB64, /**< Blowfish cipher with CFB64 mode. */
MBEDTLS_CIPHER_BLOWFISH_CTR, /**< Blowfish cipher with CTR mode. */
MBEDTLS_CIPHER_ARC4_128, /**< RC4 cipher with 128-bit mode. */
MBEDTLS_CIPHER_AES_128_CCM, /**< AES cipher with 128-bit CCM mode. */
MBEDTLS_CIPHER_AES_192_CCM, /**< AES cipher with 192-bit CCM mode. */
MBEDTLS_CIPHER_AES_256_CCM, /**< AES cipher with 256-bit CCM mode. */
MBEDTLS_CIPHER_CAMELLIA_128_CCM, /**< Camellia cipher with 128-bit CCM mode. */
MBEDTLS_CIPHER_CAMELLIA_192_CCM, /**< Camellia cipher with 192-bit CCM mode. */
MBEDTLS_CIPHER_CAMELLIA_256_CCM, /**< Camellia cipher with 256-bit CCM mode. */
MBEDTLS_CIPHER_ARIA_128_ECB, /**< Aria cipher with 128-bit key and ECB mode. */
MBEDTLS_CIPHER_ARIA_192_ECB, /**< Aria cipher with 192-bit key and ECB mode. */
MBEDTLS_CIPHER_ARIA_256_ECB, /**< Aria cipher with 256-bit key and ECB mode. */
MBEDTLS_CIPHER_ARIA_128_CBC, /**< Aria cipher with 128-bit key and CBC mode. */
MBEDTLS_CIPHER_ARIA_192_CBC, /**< Aria cipher with 192-bit key and CBC mode. */
MBEDTLS_CIPHER_ARIA_256_CBC, /**< Aria cipher with 256-bit key and CBC mode. */
MBEDTLS_CIPHER_ARIA_128_CFB128, /**< Aria cipher with 128-bit key and CFB-128 mode. */
MBEDTLS_CIPHER_ARIA_192_CFB128, /**< Aria cipher with 192-bit key and CFB-128 mode. */
MBEDTLS_CIPHER_ARIA_256_CFB128, /**< Aria cipher with 256-bit key and CFB-128 mode. */
MBEDTLS_CIPHER_ARIA_128_CTR, /**< Aria cipher with 128-bit key and CTR mode. */
MBEDTLS_CIPHER_ARIA_192_CTR, /**< Aria cipher with 192-bit key and CTR mode. */
MBEDTLS_CIPHER_ARIA_256_CTR, /**< Aria cipher with 256-bit key and CTR mode. */
MBEDTLS_CIPHER_ARIA_128_GCM, /**< Aria cipher with 128-bit key and GCM mode. */
MBEDTLS_CIPHER_ARIA_192_GCM, /**< Aria cipher with 192-bit key and GCM mode. */
MBEDTLS_CIPHER_ARIA_256_GCM, /**< Aria cipher with 256-bit key and GCM mode. */
MBEDTLS_CIPHER_ARIA_128_CCM, /**< Aria cipher with 128-bit key and CCM mode. */
MBEDTLS_CIPHER_ARIA_192_CCM, /**< Aria cipher with 192-bit key and CCM mode. */
MBEDTLS_CIPHER_ARIA_256_CCM, /**< Aria cipher with 256-bit key and CCM mode. */
MBEDTLS_CIPHER_AES_128_OFB, /**< AES 128-bit cipher in OFB mode. */
MBEDTLS_CIPHER_AES_192_OFB, /**< AES 192-bit cipher in OFB mode. */
MBEDTLS_CIPHER_AES_256_OFB, /**< AES 256-bit cipher in OFB mode. */
MBEDTLS_CIPHER_AES_128_XTS, /**< AES 128-bit cipher in XTS block mode. */
MBEDTLS_CIPHER_AES_256_XTS, /**< AES 256-bit cipher in XTS block mode. */
MBEDTLS_CIPHER_CHACHA20, /**< ChaCha20 stream cipher. */
MBEDTLS_CIPHER_CHACHA20_POLY1305, /**< ChaCha20-Poly1305 AEAD cipher. */
} mbedtls_cipher_type_t;
/** * \brief Supported {cipher type, cipher mode} pairs. * * \warning RC4 and DES are considered weak ciphers and their use * constitutes a security risk. Arm recommends considering stronger * ciphers instead. */
typedef enum {
MBEDTLS_MODE_NONE = 0, /**< None. */
MBEDTLS_MODE_ECB, /**< The ECB cipher mode. */
MBEDTLS_MODE_CBC, /**< The CBC cipher mode. */
MBEDTLS_MODE_CFB, /**< The CFB cipher mode. */
MBEDTLS_MODE_OFB, /**< The OFB cipher mode. */
MBEDTLS_MODE_CTR, /**< The CTR cipher mode. */
MBEDTLS_MODE_GCM, /**< The GCM cipher mode. */
MBEDTLS_MODE_STREAM, /**< The stream cipher mode. */
MBEDTLS_MODE_CCM, /**< The CCM cipher mode. */
MBEDTLS_MODE_XTS, /**< The XTS cipher mode. */
MBEDTLS_MODE_CHACHAPOLY, /**< The ChaCha-Poly cipher mode. */
} mbedtls_cipher_mode_t;
/** Supported cipher modes. */
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;
/** Supported cipher padding types. */
typedef enum {
MBEDTLS_OPERATION_NONE = -1,
MBEDTLS_DECRYPT = 0,
MBEDTLS_ENCRYPT,
} mbedtls_operation_t;
/** Type of operation. */
typedef struct mbedtls_cipher_base_t mbedtls_cipher_base_t;
/** * Base cipher information (opaque struct). */
typedef struct mbedtls_cmac_context_t mbedtls_cmac_context_t;
/** * CMAC context (opaque struct). */
typedef struct mbedtls_cipher_info_t
{
/** Full cipher identifier. For example,
* MBEDTLS_CIPHER_AES_256_CBC.
*/
mbedtls_cipher_type_t type;
/** The cipher mode. For example, MBEDTLS_MODE_CBC. */
mbedtls_cipher_mode_t mode;
/** The cipher key length, in bits. This is the
* 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 or nonce size, in Bytes.
* For ciphers that accept variable IV sizes,
* this is the recommended size.
*/
unsigned int iv_size;
/** Bitflag comprised of MBEDTLS_CIPHER_VARIABLE_IV_LEN and
* MBEDTLS_CIPHER_VARIABLE_KEY_LEN indicating whether the
* cipher supports variable IV or variable key sizes, respectively.
*/
int flags;
/** The block size, in Bytes. */
unsigned int block_size;
/** Struct for base cipher information and functions. */
const mbedtls_cipher_base_t *base;
} mbedtls_cipher_info_t;
/** * Cipher information. Allows calling cipher functions * in a generic way. */
typedef struct mbedtls_cipher_context_t
{
/** Information about the associated cipher. */
const mbedtls_cipher_info_t *cipher_info;
/** Key length to use. */
int key_bitlen;
/** Operation that the key of the context has been
* initialized for.
*/
mbedtls_operation_t operation;
#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
/** Padding functions to use, if relevant for
* the specific 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 input that has not been processed yet. */
unsigned char unprocessed_data[MBEDTLS_MAX_BLOCK_LENGTH];
/** Number of Bytes that have not been processed yet. */
size_t unprocessed_len;
/** Current IV or NONCE_COUNTER for CTR-mode, data unit (or sector) number
* for XTS-mode. */
unsigned char iv[MBEDTLS_MAX_IV_LENGTH];
/** IV size in Bytes, for ciphers with variable-length IVs. */
size_t iv_size;
/** The 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;
/** * Generic cipher context. */