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/*
* Basic crypto functions.
* Independent of the rest of fitz.
* For further encapsulation in filters, or not.
*/
/* crc-32 checksum */
unsigned long fz_crc32(unsigned long crc, unsigned char *buf, int len);
/* md5 digests */
typedef struct fz_md5_s fz_md5;
struct fz_md5_s
{
unsigned long state[4];
unsigned long count[2];
unsigned char buffer[64];
};
void fz_md5init(fz_md5 *state);
void fz_md5update(fz_md5 *state, const unsigned char *input, const unsigned inlen);
void fz_md5final(fz_md5 *state, unsigned char digest[16]);
/* arc4 crypto */
typedef struct fz_arc4_s fz_arc4;
struct fz_arc4_s
{
unsigned x;
unsigned y;
unsigned char state[256];
};
void fz_arc4init(fz_arc4 *state, const unsigned char *key, const unsigned len);
unsigned char fz_arc4next(fz_arc4 *state);
void fz_arc4encrypt(fz_arc4 *state, unsigned char *dest, const unsigned char *src, const unsigned len);
/* TODO: sha1 */
/* TODO: aes */
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