Filters for Compression and Encryption
[Input/Output]

Functions
int	codec_cipher_create (int op, const EVP_CIPHER *cipher, unsigned char *key, unsigned char *iv, codec_t **pcc)
	Create a cipher codec_t object.
int	codec_free (codec_t *codec)
	Dispose all the resources allocated to the supplied codec.
int	codec_gzip_create (int op, codec_t **piz)
	Create a cipher codec_t object.
int	codec_null_create (codec_t **pcn)
	Create a cipher codec_t object.

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Function Documentation

int codec_cipher_create	(	int	op,
		const EVP_CIPHER *	cipher,
		unsigned char *	key,
		unsigned char *	iv,
		codec_t **	pcc
	)

Create a cipher codec_t object at *pcc suitable for encryption or decryption (depending on op). The cipher, key and iv parameters hold the algorithm, key and initialisation vector respectively, used for the data transforms.

Parameters:

	op	one of CIPHER_ENCRYPT or CIPHER_DECRYPT
	cipher	an OpenSSL EVP_CIPHER object
	key	the encryption/decryption key
	iv	the initialisation vector
	pcc	the created codec as a value-result arguement

Returns:

0 on success, ~0 otherwise

Definition at line 166 of file cipher_cyassl.c.

int codec_free

(

codec_t *

codec

)

Dispose all the resources allocated to the supplied codec

Parameters:

codec

the codec_t object to be disposed

Returns:

always successful, i.e. 0

Definition at line 24 of file codec.c.

Referenced by io_codecs_remove().

int codec_gzip_create	(	int	op,
		codec_t **	piz
	)

Create a gzip codec_t object at *piz suitable for compression or decompression (depending on op).

Parameters:

	op	one of GZIP_COMPRESS or GZIP_UNCOMPRESS
	piz	the created codec as a value-result arguement

Returns:

0 on success, ~0 otherwise

Definition at line 142 of file gzip.c.

int codec_null_create

(

codec_t **

pcn

)

Create a null codec_t object at *pcn.

Parameters:

pcn

the created codec as a value-result arguement

Returns:

0 on success, ~0 otherwise

Definition at line 75 of file null.c.