1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Common values for ARC4 Cipher Algorithm 4 */ 5 6 #ifndef _CRYPTO_ARC4_H 7 #define _CRYPTO_ARC4_H 8 9 #include <linux/types.h> 10 11 #define ARC4_MIN_KEY_SIZE 1 12 #define ARC4_MAX_KEY_SIZE 256 13 #define ARC4_BLOCK_SIZE 1 14 15 struct arc4_ctx { 16 u32 S[256]; 17 u32 x, y; 18 }; 19 20 int arc4_setkey(struct arc4_ctx *ctx, const u8 *in_key, unsigned int key_len); 21 void arc4_crypt(struct arc4_ctx *ctx, u8 *out, const u8 *in, unsigned int len); 22 23 #endif /* _CRYPTO_ARC4_H */ 24