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mbed TLS v2.16.3
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Blowfish block cipher. More...

Go to the source code of this file.
Data Structures | |
| struct | mbedtls_blowfish_context |
| Blowfish context structure. More... | |
Macros | |
| #define | MBEDTLS_BLOWFISH_ENCRYPT 1 |
| #define | MBEDTLS_BLOWFISH_DECRYPT 0 |
| #define | MBEDTLS_BLOWFISH_MAX_KEY_BITS 448 |
| #define | MBEDTLS_BLOWFISH_MIN_KEY_BITS 32 |
| #define | MBEDTLS_BLOWFISH_ROUNDS 16 |
| #define | MBEDTLS_BLOWFISH_BLOCKSIZE 8 /* Blowfish uses 64 bit blocks */ |
| #define | MBEDTLS_ERR_BLOWFISH_INVALID_KEY_LENGTH MBEDTLS_DEPRECATED_NUMERIC_CONSTANT( -0x0016 ) |
| #define | MBEDTLS_ERR_BLOWFISH_BAD_INPUT_DATA -0x0016 |
| #define | MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH -0x0018 |
| #define | MBEDTLS_ERR_BLOWFISH_HW_ACCEL_FAILED -0x0017 |
Typedefs | |
| typedef struct mbedtls_blowfish_context | mbedtls_blowfish_context |
| Blowfish context structure. More... | |
Functions | |
| void | mbedtls_blowfish_init (mbedtls_blowfish_context *ctx) |
| Initialize a Blowfish context. More... | |
| void | mbedtls_blowfish_free (mbedtls_blowfish_context *ctx) |
| Clear a Blowfish context. More... | |
| int | mbedtls_blowfish_setkey (mbedtls_blowfish_context *ctx, const unsigned char *key, unsigned int keybits) |
| Perform a Blowfish key schedule operation. More... | |
| int | mbedtls_blowfish_crypt_ecb (mbedtls_blowfish_context *ctx, int mode, const unsigned char input[MBEDTLS_BLOWFISH_BLOCKSIZE], unsigned char output[MBEDTLS_BLOWFISH_BLOCKSIZE]) |
| Perform a Blowfish-ECB block encryption/decryption operation. More... | |
| int | mbedtls_blowfish_crypt_cbc (mbedtls_blowfish_context *ctx, int mode, size_t length, unsigned char iv[MBEDTLS_BLOWFISH_BLOCKSIZE], const unsigned char *input, unsigned char *output) |
| Perform a Blowfish-CBC buffer encryption/decryption operation. More... | |
| int | mbedtls_blowfish_crypt_cfb64 (mbedtls_blowfish_context *ctx, int mode, size_t length, size_t *iv_off, unsigned char iv[MBEDTLS_BLOWFISH_BLOCKSIZE], const unsigned char *input, unsigned char *output) |
| Perform a Blowfish CFB buffer encryption/decryption operation. More... | |
| int | mbedtls_blowfish_crypt_ctr (mbedtls_blowfish_context *ctx, size_t length, size_t *nc_off, unsigned char nonce_counter[MBEDTLS_BLOWFISH_BLOCKSIZE], unsigned char stream_block[MBEDTLS_BLOWFISH_BLOCKSIZE], const unsigned char *input, unsigned char *output) |
| Perform a Blowfish-CTR buffer encryption/decryption operation. More... | |
Blowfish block cipher.
Definition in file blowfish.h.
| #define MBEDTLS_BLOWFISH_BLOCKSIZE 8 /* Blowfish uses 64 bit blocks */ |
Definition at line 43 of file blowfish.h.
| #define MBEDTLS_BLOWFISH_DECRYPT 0 |
Definition at line 39 of file blowfish.h.
| #define MBEDTLS_BLOWFISH_ENCRYPT 1 |
Definition at line 38 of file blowfish.h.
| #define MBEDTLS_BLOWFISH_MAX_KEY_BITS 448 |
Definition at line 40 of file blowfish.h.
| #define MBEDTLS_BLOWFISH_MIN_KEY_BITS 32 |
Definition at line 41 of file blowfish.h.
| #define MBEDTLS_BLOWFISH_ROUNDS 16 |
Rounds to use. When increasing this value, make sure to extend the initialisation vectors
Definition at line 42 of file blowfish.h.
| #define MBEDTLS_ERR_BLOWFISH_BAD_INPUT_DATA -0x0016 |
Bad input data.
Definition at line 48 of file blowfish.h.
| #define MBEDTLS_ERR_BLOWFISH_HW_ACCEL_FAILED -0x0017 |
Blowfish hardware accelerator failed.
Definition at line 54 of file blowfish.h.
| #define MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH -0x0018 |
Invalid data input length.
Definition at line 50 of file blowfish.h.
| #define MBEDTLS_ERR_BLOWFISH_INVALID_KEY_LENGTH MBEDTLS_DEPRECATED_NUMERIC_CONSTANT( -0x0016 ) |
Definition at line 46 of file blowfish.h.
| typedef struct mbedtls_blowfish_context mbedtls_blowfish_context |
Blowfish context structure.
| int mbedtls_blowfish_crypt_cbc | ( | mbedtls_blowfish_context * | ctx, |
| int | mode, | ||
| size_t | length, | ||
| unsigned char | iv[MBEDTLS_BLOWFISH_BLOCKSIZE], | ||
| const unsigned char * | input, | ||
| unsigned char * | output | ||
| ) |
Perform a Blowfish-CBC buffer encryption/decryption operation.
| ctx | The Blowfish context to use. This must be initialized and bound to a key. |
| mode | The mode of operation. Possible values are MBEDTLS_BLOWFISH_ENCRYPT for encryption, or MBEDTLS_BLOWFISH_DECRYPT for decryption. |
| length | The length of the input data in Bytes. This must be multiple of 8. |
| iv | The initialization vector. This must be a read/write buffer of length 8 Bytes. It is updated by this function. |
| input | The input data. This must be a readable buffer of length length Bytes. |
| output | The output data. This must be a writable buffer of length length Bytes. |
0 if successful. | int mbedtls_blowfish_crypt_cfb64 | ( | mbedtls_blowfish_context * | ctx, |
| int | mode, | ||
| size_t | length, | ||
| size_t * | iv_off, | ||
| unsigned char | iv[MBEDTLS_BLOWFISH_BLOCKSIZE], | ||
| const unsigned char * | input, | ||
| unsigned char * | output | ||
| ) |
Perform a Blowfish CFB buffer encryption/decryption operation.
| ctx | The Blowfish context to use. This must be initialized and bound to a key. |
| mode | The mode of operation. Possible values are MBEDTLS_BLOWFISH_ENCRYPT for encryption, or MBEDTLS_BLOWFISH_DECRYPT for decryption. |
| length | The length of the input data in Bytes. |
| iv_off | The offset in the initialiation vector. The value pointed to must be smaller than 8 Bytes. It is updated by this function to support the aforementioned streaming usage. |
| iv | The initialization vector. This must be a read/write buffer of size 8 Bytes. It is updated after use. |
| input | The input data. This must be a readable buffer of length length Bytes. |
| output | The output data. This must be a writable buffer of length length Bytes. |
0 if successful. | int mbedtls_blowfish_crypt_ctr | ( | mbedtls_blowfish_context * | ctx, |
| size_t | length, | ||
| size_t * | nc_off, | ||
| unsigned char | nonce_counter[MBEDTLS_BLOWFISH_BLOCKSIZE], | ||
| unsigned char | stream_block[MBEDTLS_BLOWFISH_BLOCKSIZE], | ||
| const unsigned char * | input, | ||
| unsigned char * | output | ||
| ) |
Perform a Blowfish-CTR buffer encryption/decryption operation.
There are two common strategies for managing nonces with CTR:
nonce_counter and nc_off to 0 for the first call, and then preserve the values of nonce_counter, nc_off and stream_block across calls to this function as they will be updated by this function.With this strategy, you must not encrypt more than 2**64 blocks of data with the same key.
nonce_counter buffer in two areas: the first one used for a per-message nonce, handled by yourself, and the second one updated by this function internally.For example, you might reserve the first 4 bytes for the per-message nonce, and the last 4 bytes for internal use. In that case, before calling this function on a new message you need to set the first 4 bytes of nonce_counter to your chosen nonce value, the last 4 to 0, and nc_off to 0 (which will cause stream_block to be ignored). That way, you can encrypt at most 2**32 messages of up to 2**32 blocks each with the same key.
The per-message nonce (or information sufficient to reconstruct it) needs to be communicated with the ciphertext and must be unique. The recommended way to ensure uniqueness is to use a message counter.
Note that for both stategies, sizes are measured in blocks and that a Blowfish block is 8 bytes.
stream_block contains sensitive data. Its content must not be written to insecure storage and should be securely discarded as soon as it's no longer needed.| ctx | The Blowfish context to use. This must be initialized and bound to a key. |
| length | The length of the input data in Bytes. |
| nc_off | The offset in the current stream_block (for resuming within current cipher stream). The offset pointer should be 0 at the start of a stream and must be smaller than 8. It is updated by this function. |
| nonce_counter | The 64-bit nonce and counter. This must point to a read/write buffer of length 8 Bytes. |
| stream_block | The saved stream-block for resuming. This must point to a read/write buffer of length 8 Bytes. |
| input | The input data. This must be a readable buffer of length length Bytes. |
| output | The output data. This must be a writable buffer of length length Bytes. |
0 if successful. | int mbedtls_blowfish_crypt_ecb | ( | mbedtls_blowfish_context * | ctx, |
| int | mode, | ||
| const unsigned char | input[MBEDTLS_BLOWFISH_BLOCKSIZE], | ||
| unsigned char | output[MBEDTLS_BLOWFISH_BLOCKSIZE] | ||
| ) |
Perform a Blowfish-ECB block encryption/decryption operation.
| ctx | The Blowfish context to use. This must be initialized and bound to a key. |
| mode | The mode of operation. Possible values are MBEDTLS_BLOWFISH_ENCRYPT for encryption, or MBEDTLS_BLOWFISH_DECRYPT for decryption. |
| input | The input block. This must be a readable buffer of size 8 Bytes. |
| output | The output block. This must be a writable buffer of size 8 Bytes. |
0 if successful. | void mbedtls_blowfish_free | ( | mbedtls_blowfish_context * | ctx | ) |
Clear a Blowfish context.
| ctx | The Blowfish context to be cleared. This may be NULL, in which case this function returns immediately. If it is not NULL, it must point to an initialized Blowfish context. |
| void mbedtls_blowfish_init | ( | mbedtls_blowfish_context * | ctx | ) |
Initialize a Blowfish context.
| ctx | The Blowfish context to be initialized. This must not be NULL. |
| int mbedtls_blowfish_setkey | ( | mbedtls_blowfish_context * | ctx, |
| const unsigned char * | key, | ||
| unsigned int | keybits | ||
| ) |
Perform a Blowfish key schedule operation.
| ctx | The Blowfish context to perform the key schedule on. |
| key | The encryption key. This must be a readable buffer of length keybits Bits. |
| keybits | The length of key in Bits. This must be between 32 and 448 and a multiple of 8. |
0 if successful.
1.8.16