NCBI C++ ToolKit
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cipher.h File Reference

This file contains an abstraction interface for use with the cipher primitives provided by the library. More...

#include "mbedtls/private_access.h"
#include "mbedtls/build_info.h"
#include <stddef.h>
#include "mbedtls/platform_util.h"
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Classes

struct  mbedtls_cipher_info_t
 Cipher information. More...
 
struct  mbedtls_cipher_context_t
 Generic cipher context. More...
 

Macros

#define MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE   -0x6080
 The selected feature is not available. More...
 
#define MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA   -0x6100
 Bad input parameters. More...
 
#define MBEDTLS_ERR_CIPHER_ALLOC_FAILED   -0x6180
 Failed to allocate memory. More...
 
#define MBEDTLS_ERR_CIPHER_INVALID_PADDING   -0x6200
 Input data contains invalid padding and is rejected. More...
 
#define MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED   -0x6280
 Decryption of block requires a full block. More...
 
#define MBEDTLS_ERR_CIPHER_AUTH_FAILED   -0x6300
 Authentication failed (for AEAD modes). More...
 
#define MBEDTLS_ERR_CIPHER_INVALID_CONTEXT   -0x6380
 The context is invalid. More...
 
#define MBEDTLS_CIPHER_VARIABLE_IV_LEN   0x01
 Cipher accepts IVs of variable length. More...
 
#define MBEDTLS_CIPHER_VARIABLE_KEY_LEN   0x02
 Cipher accepts keys of variable length. More...
 
#define MBEDTLS_MAX_IV_LENGTH   16
 Maximum length of any IV, in Bytes. More...
 
#define MBEDTLS_MAX_BLOCK_LENGTH   16
 Maximum block size of any cipher, in Bytes. More...
 
#define MBEDTLS_MAX_KEY_LENGTH   32
 Maximum key length, in Bytes. More...
 
#define MBEDTLS_KEY_BITLEN_SHIFT   6
 
#define MBEDTLS_IV_SIZE_SHIFT   2
 

Typedefs

typedef struct mbedtls_cipher_base_t mbedtls_cipher_base_t
 Base cipher information (opaque struct). More...
 
typedef struct mbedtls_cmac_context_t mbedtls_cmac_context_t
 CMAC context (opaque struct). More...
 
typedef struct mbedtls_cipher_info_t mbedtls_cipher_info_t
 Cipher information. More...
 
typedef struct mbedtls_cipher_context_t mbedtls_cipher_context_t
 Generic cipher context. More...
 

Enumerations

enum  mbedtls_cipher_id_t {
  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_ARIA , MBEDTLS_CIPHER_ID_CHACHA20
}
 Supported cipher types. More...
 
enum  mbedtls_cipher_type_t {
  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_AES_128_CCM , MBEDTLS_CIPHER_AES_192_CCM ,
  MBEDTLS_CIPHER_AES_256_CCM , MBEDTLS_CIPHER_AES_128_CCM_STAR_NO_TAG , MBEDTLS_CIPHER_AES_192_CCM_STAR_NO_TAG , MBEDTLS_CIPHER_AES_256_CCM_STAR_NO_TAG ,
  MBEDTLS_CIPHER_CAMELLIA_128_CCM , MBEDTLS_CIPHER_CAMELLIA_192_CCM , MBEDTLS_CIPHER_CAMELLIA_256_CCM , MBEDTLS_CIPHER_CAMELLIA_128_CCM_STAR_NO_TAG ,
  MBEDTLS_CIPHER_CAMELLIA_192_CCM_STAR_NO_TAG , MBEDTLS_CIPHER_CAMELLIA_256_CCM_STAR_NO_TAG , MBEDTLS_CIPHER_ARIA_128_ECB , MBEDTLS_CIPHER_ARIA_192_ECB ,
  MBEDTLS_CIPHER_ARIA_256_ECB , MBEDTLS_CIPHER_ARIA_128_CBC , MBEDTLS_CIPHER_ARIA_192_CBC , MBEDTLS_CIPHER_ARIA_256_CBC ,
  MBEDTLS_CIPHER_ARIA_128_CFB128 , MBEDTLS_CIPHER_ARIA_192_CFB128 , MBEDTLS_CIPHER_ARIA_256_CFB128 , MBEDTLS_CIPHER_ARIA_128_CTR ,
  MBEDTLS_CIPHER_ARIA_192_CTR , MBEDTLS_CIPHER_ARIA_256_CTR , MBEDTLS_CIPHER_ARIA_128_GCM , MBEDTLS_CIPHER_ARIA_192_GCM ,
  MBEDTLS_CIPHER_ARIA_256_GCM , MBEDTLS_CIPHER_ARIA_128_CCM , MBEDTLS_CIPHER_ARIA_192_CCM , MBEDTLS_CIPHER_ARIA_256_CCM ,
  MBEDTLS_CIPHER_ARIA_128_CCM_STAR_NO_TAG , MBEDTLS_CIPHER_ARIA_192_CCM_STAR_NO_TAG , MBEDTLS_CIPHER_ARIA_256_CCM_STAR_NO_TAG , MBEDTLS_CIPHER_AES_128_OFB ,
  MBEDTLS_CIPHER_AES_192_OFB , MBEDTLS_CIPHER_AES_256_OFB , MBEDTLS_CIPHER_AES_128_XTS , MBEDTLS_CIPHER_AES_256_XTS ,
  MBEDTLS_CIPHER_CHACHA20 , MBEDTLS_CIPHER_CHACHA20_POLY1305 , MBEDTLS_CIPHER_AES_128_KW , MBEDTLS_CIPHER_AES_192_KW ,
  MBEDTLS_CIPHER_AES_256_KW , MBEDTLS_CIPHER_AES_128_KWP , MBEDTLS_CIPHER_AES_192_KWP , MBEDTLS_CIPHER_AES_256_KWP
}
 Supported {cipher type, cipher mode} pairs. More...
 
enum  mbedtls_cipher_mode_t {
  MBEDTLS_MODE_NONE = 0 , MBEDTLS_MODE_ECB , MBEDTLS_MODE_CBC , MBEDTLS_MODE_CFB ,
  MBEDTLS_MODE_OFB , MBEDTLS_MODE_CTR , MBEDTLS_MODE_GCM , MBEDTLS_MODE_STREAM ,
  MBEDTLS_MODE_CCM , MBEDTLS_MODE_CCM_STAR_NO_TAG , MBEDTLS_MODE_XTS , MBEDTLS_MODE_CHACHAPOLY ,
  MBEDTLS_MODE_KW , MBEDTLS_MODE_KWP
}
 Supported cipher modes. More...
 
enum  mbedtls_cipher_padding_t {
  MBEDTLS_PADDING_PKCS7 = 0 , MBEDTLS_PADDING_ONE_AND_ZEROS , MBEDTLS_PADDING_ZEROS_AND_LEN , MBEDTLS_PADDING_ZEROS ,
  MBEDTLS_PADDING_NONE
}
 Supported cipher padding types. More...
 
enum  mbedtls_operation_t { MBEDTLS_OPERATION_NONE = -1 , MBEDTLS_DECRYPT = 0 , MBEDTLS_ENCRYPT }
 Type of operation. More...
 
enum  { MBEDTLS_KEY_LENGTH_NONE = 0 , MBEDTLS_KEY_LENGTH_DES = 64 , MBEDTLS_KEY_LENGTH_DES_EDE = 128 , MBEDTLS_KEY_LENGTH_DES_EDE3 = 192 }
 

Functions

const intmbedtls_cipher_list (void)
 This function retrieves the list of ciphers supported by the generic cipher module. More...
 
const mbedtls_cipher_info_tmbedtls_cipher_info_from_string (const char *cipher_name)
 This function retrieves the cipher-information structure associated with the given cipher name. More...
 
const mbedtls_cipher_info_tmbedtls_cipher_info_from_type (const mbedtls_cipher_type_t cipher_type)
 This function retrieves the cipher-information structure associated with the given cipher type. More...
 
const mbedtls_cipher_info_tmbedtls_cipher_info_from_values (const mbedtls_cipher_id_t cipher_id, int key_bitlen, const mbedtls_cipher_mode_t mode)
 This function retrieves the cipher-information structure associated with the given cipher ID, key size and mode. More...
 
static mbedtls_cipher_type_t mbedtls_cipher_info_get_type (const mbedtls_cipher_info_t *info)
 Retrieve the identifier for a cipher info structure. More...
 
static mbedtls_cipher_mode_t mbedtls_cipher_info_get_mode (const mbedtls_cipher_info_t *info)
 Retrieve the operation mode for a cipher info structure. More...
 
static size_t mbedtls_cipher_info_get_key_bitlen (const mbedtls_cipher_info_t *info)
 Retrieve the key size for a cipher info structure. More...
 
static const char * mbedtls_cipher_info_get_name (const mbedtls_cipher_info_t *info)
 Retrieve the human-readable name for a cipher info structure. More...
 
static size_t mbedtls_cipher_info_get_iv_size (const mbedtls_cipher_info_t *info)
 This function returns the size of the IV or nonce for the cipher info structure, in bytes. More...
 
static size_t mbedtls_cipher_info_get_block_size (const mbedtls_cipher_info_t *info)
 This function returns the block size of the given cipher info structure in bytes. More...
 
static int mbedtls_cipher_info_has_variable_key_bitlen (const mbedtls_cipher_info_t *info)
 This function returns a non-zero value if the key length for the given cipher is variable. More...
 
static int mbedtls_cipher_info_has_variable_iv_size (const mbedtls_cipher_info_t *info)
 This function returns a non-zero value if the IV size for the given cipher is variable. More...
 
void mbedtls_cipher_init (mbedtls_cipher_context_t *ctx)
 This function initializes a ctx as NONE. More...
 
void mbedtls_cipher_free (mbedtls_cipher_context_t *ctx)
 This function frees and clears the cipher-specific context of ctx. More...
 
int mbedtls_cipher_setup (mbedtls_cipher_context_t *ctx, const mbedtls_cipher_info_t *cipher_info)
 This function prepares a cipher context for use with the given cipher primitive. More...
 
static unsigned int mbedtls_cipher_get_block_size (const mbedtls_cipher_context_t *ctx)
 This function returns the block size of the given cipher in bytes. More...
 
static mbedtls_cipher_mode_t mbedtls_cipher_get_cipher_mode (const mbedtls_cipher_context_t *ctx)
 This function returns the mode of operation for the cipher. More...
 
static int mbedtls_cipher_get_iv_size (const mbedtls_cipher_context_t *ctx)
 This function returns the size of the IV or nonce of the cipher, in Bytes. More...
 
static mbedtls_cipher_type_t mbedtls_cipher_get_type (const mbedtls_cipher_context_t *ctx)
 This function returns the type of the given cipher. More...
 
static const char * mbedtls_cipher_get_name (const mbedtls_cipher_context_t *ctx)
 This function returns the name of the given cipher as a string. More...
 
static int mbedtls_cipher_get_key_bitlen (const mbedtls_cipher_context_t *ctx)
 This function returns the key length of the cipher. More...
 
static mbedtls_operation_t mbedtls_cipher_get_operation (const mbedtls_cipher_context_t *ctx)
 This function returns the operation of the given cipher. More...
 
int mbedtls_cipher_setkey (mbedtls_cipher_context_t *ctx, const unsigned char *key, int key_bitlen, const mbedtls_operation_t operation)
 This function sets the key to use with the given context. More...
 
int mbedtls_cipher_set_iv (mbedtls_cipher_context_t *ctx, const unsigned char *iv, size_t iv_len)
 This function sets the initialization vector (IV) or nonce. More...
 
int mbedtls_cipher_reset (mbedtls_cipher_context_t *ctx)
 This function resets the cipher state. More...
 
int mbedtls_cipher_update (mbedtls_cipher_context_t *ctx, const unsigned char *input, size_t ilen, unsigned char *output, size_t *olen)
 The generic cipher update function. More...
 
int mbedtls_cipher_finish (mbedtls_cipher_context_t *ctx, unsigned char *output, size_t *olen)
 The generic cipher finalization function. More...
 
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)
 The generic all-in-one encryption/decryption function, for all ciphers except AEAD constructs. More...
 

Detailed Description

This file contains an abstraction interface for use with the cipher primitives provided by the library.

It provides a common interface to all of the available cipher operations.

Author
Adriaan de Jong dejon.nosp@m.g@fo.nosp@m.x-it..nosp@m.com

Definition in file cipher.h.

Macro Definition Documentation

◆ MBEDTLS_CIPHER_VARIABLE_IV_LEN

#define MBEDTLS_CIPHER_VARIABLE_IV_LEN   0x01

Cipher accepts IVs of variable length.

Definition at line 52 of file cipher.h.

◆ MBEDTLS_CIPHER_VARIABLE_KEY_LEN

#define MBEDTLS_CIPHER_VARIABLE_KEY_LEN   0x02

Cipher accepts keys of variable length.

Definition at line 53 of file cipher.h.

◆ MBEDTLS_ERR_CIPHER_ALLOC_FAILED

#define MBEDTLS_ERR_CIPHER_ALLOC_FAILED   -0x6180

Failed to allocate memory.

Definition at line 42 of file cipher.h.

◆ MBEDTLS_ERR_CIPHER_AUTH_FAILED

#define MBEDTLS_ERR_CIPHER_AUTH_FAILED   -0x6300

Authentication failed (for AEAD modes).

Definition at line 48 of file cipher.h.

◆ MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA

#define MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA   -0x6100

Bad input parameters.

Definition at line 40 of file cipher.h.

◆ MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE

#define MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE   -0x6080

The selected feature is not available.

Definition at line 38 of file cipher.h.

◆ MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED

#define MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED   -0x6280

Decryption of block requires a full block.

Definition at line 46 of file cipher.h.

◆ MBEDTLS_ERR_CIPHER_INVALID_CONTEXT

#define MBEDTLS_ERR_CIPHER_INVALID_CONTEXT   -0x6380

The context is invalid.

For example, because it was freed.

Definition at line 50 of file cipher.h.

◆ MBEDTLS_ERR_CIPHER_INVALID_PADDING

#define MBEDTLS_ERR_CIPHER_INVALID_PADDING   -0x6200

Input data contains invalid padding and is rejected.

Definition at line 44 of file cipher.h.

◆ MBEDTLS_IV_SIZE_SHIFT

#define MBEDTLS_IV_SIZE_SHIFT   2

Definition at line 312 of file cipher.h.

◆ MBEDTLS_KEY_BITLEN_SHIFT

#define MBEDTLS_KEY_BITLEN_SHIFT   6

Definition at line 311 of file cipher.h.

◆ MBEDTLS_MAX_BLOCK_LENGTH

#define MBEDTLS_MAX_BLOCK_LENGTH   16

Maximum block size of any cipher, in Bytes.

Definition at line 226 of file cipher.h.

◆ MBEDTLS_MAX_IV_LENGTH

#define MBEDTLS_MAX_IV_LENGTH   16

Maximum length of any IV, in Bytes.

Definition at line 220 of file cipher.h.

◆ MBEDTLS_MAX_KEY_LENGTH

#define MBEDTLS_MAX_KEY_LENGTH   32

Maximum key length, in Bytes.

Definition at line 238 of file cipher.h.

Typedef Documentation

◆ mbedtls_cipher_base_t

Base cipher information (opaque struct).

Definition at line 1 of file cipher.h.

◆ mbedtls_cipher_context_t

Generic cipher context.

◆ mbedtls_cipher_info_t

Cipher information.

Allows calling cipher functions in a generic way.

Note
The library does not support custom cipher info structures, only built-in structures returned by the functions mbedtls_cipher_info_from_string(), mbedtls_cipher_info_from_type(), mbedtls_cipher_info_from_values(), mbedtls_cipher_info_from_psa().
Some fields store a value that has been right-shifted to save code-size, so should not be used directly. The accessor functions adjust for this and return the "natural" value.

◆ mbedtls_cmac_context_t

CMAC context (opaque struct).

Definition at line 1 of file cipher.h.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum
Enumerator
MBEDTLS_KEY_LENGTH_NONE 

Undefined key length.

MBEDTLS_KEY_LENGTH_DES 

Key length, in bits (including parity), for DES keys.

Warning
DES is considered weak.
MBEDTLS_KEY_LENGTH_DES_EDE 

Key length in bits, including parity, for DES in two-key EDE.

Warning
3DES is considered weak.
MBEDTLS_KEY_LENGTH_DES_EDE3 

Key length in bits, including parity, for DES in three-key EDE.

Warning
3DES is considered weak.

Definition at line 205 of file cipher.h.

◆ mbedtls_cipher_id_t

Supported cipher types.

Warning
DES/3DES are considered weak ciphers and their use constitutes a security risk. We recommend considering stronger ciphers instead.
Enumerator
MBEDTLS_CIPHER_ID_NONE 

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.

Warning
DES is considered weak.
MBEDTLS_CIPHER_ID_3DES 

The Triple DES cipher.

Warning
3DES is considered weak.
MBEDTLS_CIPHER_ID_CAMELLIA 

The Camellia cipher.

MBEDTLS_CIPHER_ID_ARIA 

The Aria cipher.

MBEDTLS_CIPHER_ID_CHACHA20 

The ChaCha20 cipher.

Definition at line 66 of file cipher.h.

◆ mbedtls_cipher_mode_t

Supported cipher modes.

Enumerator
MBEDTLS_MODE_NONE 

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_CCM_STAR_NO_TAG 

The CCM*-no-tag cipher mode.

MBEDTLS_MODE_XTS 

The XTS cipher mode.

MBEDTLS_MODE_CHACHAPOLY 

The ChaCha-Poly cipher mode.

MBEDTLS_MODE_KW 

The SP800-38F KW mode.

MBEDTLS_MODE_KWP 

The SP800-38F KWP mode.

Definition at line 172 of file cipher.h.

◆ mbedtls_cipher_padding_t

Supported cipher padding types.

Enumerator
MBEDTLS_PADDING_PKCS7 

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).

Definition at line 190 of file cipher.h.

◆ mbedtls_cipher_type_t

Supported {cipher type, cipher mode} pairs.

Warning
DES/3DES are considered weak ciphers and their use constitutes a security risk. We recommend considering stronger ciphers instead.
Enumerator
MBEDTLS_CIPHER_NONE 

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.

Warning
DES is considered weak.
MBEDTLS_CIPHER_DES_CBC 

DES cipher with CBC mode.

Warning
DES is considered weak.
MBEDTLS_CIPHER_DES_EDE_ECB 

DES cipher with EDE ECB mode.

Warning
3DES is considered weak.
MBEDTLS_CIPHER_DES_EDE_CBC 

DES cipher with EDE CBC mode.

Warning
3DES is considered weak.
MBEDTLS_CIPHER_DES_EDE3_ECB 

DES cipher with EDE3 ECB mode.

Warning
3DES is considered weak.
MBEDTLS_CIPHER_DES_EDE3_CBC 

DES cipher with EDE3 CBC mode.

Warning
3DES is considered weak.
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_AES_128_CCM_STAR_NO_TAG 

AES cipher with 128-bit CCM_STAR_NO_TAG mode.

MBEDTLS_CIPHER_AES_192_CCM_STAR_NO_TAG 

AES cipher with 192-bit CCM_STAR_NO_TAG mode.

MBEDTLS_CIPHER_AES_256_CCM_STAR_NO_TAG 

AES cipher with 256-bit CCM_STAR_NO_TAG 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_CAMELLIA_128_CCM_STAR_NO_TAG 

Camellia cipher with 128-bit CCM_STAR_NO_TAG mode.

MBEDTLS_CIPHER_CAMELLIA_192_CCM_STAR_NO_TAG 

Camellia cipher with 192-bit CCM_STAR_NO_TAG mode.

MBEDTLS_CIPHER_CAMELLIA_256_CCM_STAR_NO_TAG 

Camellia cipher with 256-bit CCM_STAR_NO_TAG 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_ARIA_128_CCM_STAR_NO_TAG 

Aria cipher with 128-bit key and CCM_STAR_NO_TAG mode.

MBEDTLS_CIPHER_ARIA_192_CCM_STAR_NO_TAG 

Aria cipher with 192-bit key and CCM_STAR_NO_TAG mode.

MBEDTLS_CIPHER_ARIA_256_CCM_STAR_NO_TAG 

Aria cipher with 256-bit key and CCM_STAR_NO_TAG 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_AES_128_KW 

AES cipher with 128-bit NIST KW mode.

MBEDTLS_CIPHER_AES_192_KW 

AES cipher with 192-bit NIST KW mode.

MBEDTLS_CIPHER_AES_256_KW 

AES cipher with 256-bit NIST KW mode.

MBEDTLS_CIPHER_AES_128_KWP 

AES cipher with 128-bit NIST KWP mode.

MBEDTLS_CIPHER_AES_192_KWP 

AES cipher with 192-bit NIST KWP mode.

MBEDTLS_CIPHER_AES_256_KWP 

AES cipher with 256-bit NIST KWP mode.

Definition at line 84 of file cipher.h.

◆ mbedtls_operation_t

Type of operation.

Enumerator
MBEDTLS_OPERATION_NONE 
MBEDTLS_DECRYPT 
MBEDTLS_ENCRYPT 

Definition at line 199 of file cipher.h.

Function Documentation

◆ mbedtls_cipher_crypt()

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 
)

The generic all-in-one encryption/decryption function, for all ciphers except AEAD constructs.

Parameters
ctxThe generic cipher context. This must be initialized.
ivThe IV to use, or NONCE_COUNTER for CTR-mode ciphers. This must be a readable buffer of at least iv_len Bytes.
iv_lenThe IV length for ciphers with variable-size IV. This parameter is discarded by ciphers with fixed-size IV.
inputThe buffer holding the input data. This must be a readable buffer of at least ilen Bytes.
ilenThe length of the input data in Bytes.
outputThe buffer for the output data. This must be able to hold at least `ilen + block_size`. This must not be the same buffer as input.
olenThe length of the output data, to be updated with the actual number of Bytes written. This must not be NULL.
Note
Some ciphers do not use IVs nor nonce. For these ciphers, use iv = NULL and iv_len = 0.
Returns
0 on success.
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on parameter-verification failure.
MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED on decryption expecting a full block but not receiving one.
MBEDTLS_ERR_CIPHER_INVALID_PADDING on invalid padding while decrypting.
A cipher-specific error code on failure.

◆ mbedtls_cipher_finish()

int mbedtls_cipher_finish ( mbedtls_cipher_context_t ctx,
unsigned char *  output,
size_t *  olen 
)

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 output buffer.

Parameters
ctxThe generic cipher context. This must be initialized and bound to a key.
outputThe buffer to write data to. This needs to be a writable buffer of at least block_size Bytes.
olenThe length of the data written to the output buffer. This may not be NULL.
Returns
0 on success.
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on parameter-verification failure.
MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED on decryption expecting a full block but not receiving one.
MBEDTLS_ERR_CIPHER_INVALID_PADDING on invalid padding while decrypting.
A cipher-specific error code on failure.

◆ mbedtls_cipher_free()

void mbedtls_cipher_free ( mbedtls_cipher_context_t ctx)

This function frees and clears the cipher-specific context of ctx.

Freeing ctx itself remains the responsibility of the caller.

Parameters
ctxThe context to be freed. If this is NULL, the function has no effect, otherwise this must point to an initialized context.

◆ mbedtls_cipher_get_block_size()

static unsigned int mbedtls_cipher_get_block_size ( const mbedtls_cipher_context_t ctx)
inlinestatic

This function returns the block size of the given cipher in bytes.

Parameters
ctxThe context of the cipher.
Returns
The block size of the underlying cipher.
1 if the cipher is a stream cipher.
0 if ctx has not been initialized.

Definition at line 678 of file cipher.h.

References ctx, and NULL.

◆ mbedtls_cipher_get_cipher_mode()

static mbedtls_cipher_mode_t mbedtls_cipher_get_cipher_mode ( const mbedtls_cipher_context_t ctx)
inlinestatic

This function returns the mode of operation for the cipher.

For example, MBEDTLS_MODE_CBC.

Parameters
ctxThe context of the cipher. This must be initialized.
Returns
The mode of operation.
MBEDTLS_MODE_NONE if ctx has not been initialized.

Definition at line 697 of file cipher.h.

References ctx, MBEDTLS_MODE_NONE, and NULL.

◆ mbedtls_cipher_get_iv_size()

static int mbedtls_cipher_get_iv_size ( const mbedtls_cipher_context_t ctx)
inlinestatic

This function returns the size of the IV or nonce of the cipher, in Bytes.

Parameters
ctxThe context of the cipher. This must be initialized.
Returns
The recommended IV size if no IV has been set.
0 for ciphers not using an IV or a nonce.
The actual size if an IV has been set.

Definition at line 717 of file cipher.h.

References ctx, int, MBEDTLS_IV_SIZE_SHIFT, and NULL.

◆ mbedtls_cipher_get_key_bitlen()

static int mbedtls_cipher_get_key_bitlen ( const mbedtls_cipher_context_t ctx)
inlinestatic

This function returns the key length of the cipher.

Parameters
ctxThe context of the cipher. This must be initialized.
Returns
The key length of the cipher in bits.
MBEDTLS_KEY_LENGTH_NONE if ctx has not been initialized.

Definition at line 778 of file cipher.h.

References ctx, MBEDTLS_KEY_BITLEN_SHIFT, MBEDTLS_KEY_LENGTH_NONE, and NULL.

◆ mbedtls_cipher_get_name()

static const char* mbedtls_cipher_get_name ( const mbedtls_cipher_context_t ctx)
inlinestatic

This function returns the name of the given cipher as a string.

Parameters
ctxThe context of the cipher. This must be initialized.
Returns
The name of the cipher.
NULL if ctx has not been not initialized.

Definition at line 759 of file cipher.h.

References ctx, and NULL.

◆ mbedtls_cipher_get_operation()

static mbedtls_operation_t mbedtls_cipher_get_operation ( const mbedtls_cipher_context_t ctx)
inlinestatic

This function returns the operation of the given cipher.

Parameters
ctxThe context of the cipher. This must be initialized.
Returns
The type of operation: MBEDTLS_ENCRYPT or MBEDTLS_DECRYPT.
MBEDTLS_OPERATION_NONE if ctx has not been initialized.

Definition at line 797 of file cipher.h.

References ctx, MBEDTLS_OPERATION_NONE, and NULL.

◆ mbedtls_cipher_get_type()

static mbedtls_cipher_type_t mbedtls_cipher_get_type ( const mbedtls_cipher_context_t ctx)
inlinestatic

This function returns the type of the given cipher.

Parameters
ctxThe context of the cipher. This must be initialized.
Returns
The type of the cipher.
MBEDTLS_CIPHER_NONE if ctx has not been initialized.

Definition at line 740 of file cipher.h.

References ctx, MBEDTLS_CIPHER_NONE, and NULL.

◆ mbedtls_cipher_info_from_string()

const mbedtls_cipher_info_t* mbedtls_cipher_info_from_string ( const char *  cipher_name)

This function retrieves the cipher-information structure associated with the given cipher name.

Parameters
cipher_nameName of the cipher to search for. This must not be NULL.
Returns
The cipher information structure associated with the given cipher_name.
NULL if the associated cipher information is not found.

◆ mbedtls_cipher_info_from_type()

const mbedtls_cipher_info_t* mbedtls_cipher_info_from_type ( const mbedtls_cipher_type_t  cipher_type)

This function retrieves the cipher-information structure associated with the given cipher type.

Parameters
cipher_typeType of the cipher to search for.
Returns
The cipher information structure associated with the given cipher_type.
NULL if the associated cipher information is not found.

◆ mbedtls_cipher_info_from_values()

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 
)

This function retrieves the cipher-information structure associated with the given cipher ID, key size and mode.

Parameters
cipher_idThe ID of the cipher to search for. For example, MBEDTLS_CIPHER_ID_AES.
key_bitlenThe length of the key in bits.
modeThe cipher mode. For example, MBEDTLS_MODE_CBC.
Returns
The cipher information structure associated with the given cipher_id.
NULL if the associated cipher information is not found.

◆ mbedtls_cipher_info_get_block_size()

static size_t mbedtls_cipher_info_get_block_size ( const mbedtls_cipher_info_t info)
inlinestatic

This function returns the block size of the given cipher info structure in bytes.

Parameters
infoThe cipher info structure. This may be NULL.
Returns
The block size of the cipher.
1 if the cipher is a stream cipher.
0 if info is NULL.

Definition at line 538 of file cipher.h.

References info, and NULL.

◆ mbedtls_cipher_info_get_iv_size()

static size_t mbedtls_cipher_info_get_iv_size ( const mbedtls_cipher_info_t info)
inlinestatic

This function returns the size of the IV or nonce for the cipher info structure, in bytes.

Parameters
infoThe cipher info structure. This may be NULL.
Returns
The recommended IV size.
0 for ciphers not using an IV or a nonce.
0 if info is NULL.

Definition at line 518 of file cipher.h.

References info, MBEDTLS_IV_SIZE_SHIFT, and NULL.

◆ mbedtls_cipher_info_get_key_bitlen()

static size_t mbedtls_cipher_info_get_key_bitlen ( const mbedtls_cipher_info_t info)
inlinestatic

Retrieve the key size for a cipher info structure.

Parameters
[in]infoThe cipher info structure to query. This may be NULL.
Returns
The key length in bits. For variable-sized ciphers, this is the default length. For DES, this includes the parity bits.
0 if info is NULL.

Definition at line 477 of file cipher.h.

References info, MBEDTLS_KEY_BITLEN_SHIFT, and NULL.

◆ mbedtls_cipher_info_get_mode()

static mbedtls_cipher_mode_t mbedtls_cipher_info_get_mode ( const mbedtls_cipher_info_t info)
inlinestatic

Retrieve the operation mode for a cipher info structure.

Parameters
[in]infoThe cipher info structure to query. This may be NULL.
Returns
The cipher mode (MBEDTLS_MODE_xxx).
MBEDTLS_MODE_NONE if info is NULL.

Definition at line 456 of file cipher.h.

References info, MBEDTLS_MODE_NONE, and NULL.

◆ mbedtls_cipher_info_get_name()

static const char* mbedtls_cipher_info_get_name ( const mbedtls_cipher_info_t info)
inlinestatic

Retrieve the human-readable name for a cipher info structure.

Parameters
[in]infoThe cipher info structure to query. This may be NULL.
Returns
The cipher name, which is a human readable string, with static storage duration.
NULL if info is NULL.

Definition at line 498 of file cipher.h.

References info, and NULL.

◆ mbedtls_cipher_info_get_type()

static mbedtls_cipher_type_t mbedtls_cipher_info_get_type ( const mbedtls_cipher_info_t info)
inlinestatic

Retrieve the identifier for a cipher info structure.

Parameters
[in]infoThe cipher info structure to query. This may be NULL.
Returns
The full cipher identifier (MBEDTLS_CIPHER_xxx).
MBEDTLS_CIPHER_NONE if info is NULL.

Definition at line 437 of file cipher.h.

References info, MBEDTLS_CIPHER_NONE, and NULL.

◆ mbedtls_cipher_info_has_variable_iv_size()

static int mbedtls_cipher_info_has_variable_iv_size ( const mbedtls_cipher_info_t info)
inlinestatic

This function returns a non-zero value if the IV size for the given cipher is variable.

Parameters
infoThe cipher info structure. This may be NULL.
Returns
Non-zero if the IV size is variable, 0 otherwise.
0 if the given pointer is NULL.

Definition at line 576 of file cipher.h.

References flags, info, MBEDTLS_CIPHER_VARIABLE_IV_LEN, and NULL.

◆ mbedtls_cipher_info_has_variable_key_bitlen()

static int mbedtls_cipher_info_has_variable_key_bitlen ( const mbedtls_cipher_info_t info)
inlinestatic

This function returns a non-zero value if the key length for the given cipher is variable.

Parameters
infoThe cipher info structure. This may be NULL.
Returns
Non-zero if the key length is variable, 0 otherwise.
0 if the given pointer is NULL.

Definition at line 557 of file cipher.h.

References flags, info, MBEDTLS_CIPHER_VARIABLE_KEY_LEN, and NULL.

◆ mbedtls_cipher_init()

void mbedtls_cipher_init ( mbedtls_cipher_context_t ctx)

This function initializes a ctx as NONE.

Parameters
ctxThe context to be initialized. This must not be NULL.

◆ mbedtls_cipher_list()

const int* mbedtls_cipher_list ( void  )

This function retrieves the list of ciphers supported by the generic cipher module.

For any cipher identifier in the returned list, you can obtain the corresponding generic cipher information structure via mbedtls_cipher_info_from_type(), which can then be used to prepare a cipher context via mbedtls_cipher_setup().

Returns
A statically-allocated array of cipher identifiers of type cipher_type_t. The last entry is zero.

◆ mbedtls_cipher_reset()

int mbedtls_cipher_reset ( mbedtls_cipher_context_t ctx)

This function resets the cipher state.

Note
With non-AEAD ciphers, the order of calls for each message is as follows: 1. mbedtls_cipher_set_iv() if the mode uses an IV/nonce. 2. mbedtls_cipher_reset() 3. mbedtls_cipher_update() one or more times 4. mbedtls_cipher_finish() This sequence can be repeated to encrypt or decrypt multiple messages with the same key.
With AEAD ciphers, the order of calls for each message is as follows: 1. mbedtls_cipher_set_iv() if the mode uses an IV/nonce. 2. mbedtls_cipher_reset() 3. mbedtls_cipher_update_ad() 4. mbedtls_cipher_update() one or more times 5. mbedtls_cipher_finish() 6. mbedtls_cipher_check_tag() (for decryption) or mbedtls_cipher_write_tag() (for encryption). This sequence can be repeated to encrypt or decrypt multiple messages with the same key.
Parameters
ctxThe generic cipher context. This must be bound to a key.
Returns
0 on success.
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on parameter-verification failure.

◆ mbedtls_cipher_set_iv()

int mbedtls_cipher_set_iv ( mbedtls_cipher_context_t ctx,
const unsigned char *  iv,
size_t  iv_len 
)

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.
For MBEDTLS_CIPHER_CHACHA20, the nonce length must be 12, and the initial counter value is 0.
For MBEDTLS_CIPHER_CHACHA20_POLY1305, the nonce length must be 12.
Parameters
ctxThe generic cipher context. This must be initialized and bound to a cipher information structure.
ivThe IV to use, or NONCE_COUNTER for CTR-mode ciphers. This must be a readable buffer of at least iv_len Bytes.
iv_lenThe IV length for ciphers with variable-size IV. This parameter is discarded by ciphers with fixed-size IV.
Returns
0 on success.
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on parameter-verification failure.

◆ mbedtls_cipher_setkey()

int mbedtls_cipher_setkey ( mbedtls_cipher_context_t ctx,
const unsigned char *  key,
int  key_bitlen,
const mbedtls_operation_t  operation 
)

This function sets the key to use with the given context.

Parameters
ctxThe generic cipher context. This must be initialized and bound to a cipher information structure.
keyThe key to use. This must be a readable buffer of at least key_bitlen Bits.
key_bitlenThe key length to use, in Bits.
operationThe operation that the key will be used for: MBEDTLS_ENCRYPT or MBEDTLS_DECRYPT.
Returns
0 on success.
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on parameter-verification failure.
A cipher-specific error code on failure.

◆ mbedtls_cipher_setup()

int mbedtls_cipher_setup ( mbedtls_cipher_context_t ctx,
const mbedtls_cipher_info_t cipher_info 
)

This function prepares a cipher context for use with the given cipher primitive.

Note
After calling this function, you should call mbedtls_cipher_setkey() and, if the mode uses padding, mbedtls_cipher_set_padding_mode(), then for each message to encrypt or decrypt with this key, either:
Parameters
ctxThe context to prepare. This must be initialized by a call to mbedtls_cipher_init() first.
cipher_infoThe cipher to use.
Returns
0 on success.
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on parameter-verification failure.
MBEDTLS_ERR_CIPHER_ALLOC_FAILED if allocation of the cipher-specific context fails.

◆ mbedtls_cipher_update()

int mbedtls_cipher_update ( mbedtls_cipher_context_t ctx,
const unsigned char *  input,
size_t  ilen,
unsigned char *  output,
size_t *  olen 
)

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.

Parameters
ctxThe generic cipher context. This must be initialized and bound to a key.
inputThe buffer holding the input data. This must be a readable buffer of at least ilen Bytes.
ilenThe length of the input data.
outputThe buffer for the output data. This must be able to hold at least `ilen + block_size`. This must not be the same buffer as input.
olenThe length of the output data, to be updated with the actual number of Bytes written. This must not be NULL.
Returns
0 on success.
MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA on parameter-verification failure.
MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE on an unsupported mode for a cipher.
A cipher-specific error code on failure.
Modified on Mon Jul 15 05:34:22 2024 by modify_doxy.py rev. 669887