#ifndef RC4_H # define RC4_H struct rc4_ctx { uint8_t state[256]; uint32_t i; uint32_t j; }; void rc4_init(uint8_t * key, uint32_t keylen, struct rc4_ctx *ctx); void rc4_combine(struct rc4_ctx *ctx, uint8_t *input, uint32_t len, uint8_t *output); #endif