1*9d12795fSRobert Mustacchi /* 2*9d12795fSRobert Mustacchi * This file and its contents are supplied under the terms of the 3*9d12795fSRobert Mustacchi * Common Development and Distribution License ("CDDL"), version 1.0. 4*9d12795fSRobert Mustacchi * You may only use this file in accordance with the terms of version 5*9d12795fSRobert Mustacchi * 1.0 of the CDDL. 6*9d12795fSRobert Mustacchi * 7*9d12795fSRobert Mustacchi * A full copy of the text of the CDDL should have accompanied this 8*9d12795fSRobert Mustacchi * source. A copy of the CDDL is also available via the Internet at 9*9d12795fSRobert Mustacchi * http://www.illumos.org/license/CDDL. 10*9d12795fSRobert Mustacchi */ 11*9d12795fSRobert Mustacchi 12*9d12795fSRobert Mustacchi /* 13*9d12795fSRobert Mustacchi * Copyright (c) 2015, Joyent, Inc. 14*9d12795fSRobert Mustacchi */ 15*9d12795fSRobert Mustacchi 16*9d12795fSRobert Mustacchi #ifndef _CHACHA_H 17*9d12795fSRobert Mustacchi #define _CHACHA_H 18*9d12795fSRobert Mustacchi 19*9d12795fSRobert Mustacchi /* 20*9d12795fSRobert Mustacchi * ChaCha cipher implementation header 21*9d12795fSRobert Mustacchi * 22*9d12795fSRobert Mustacchi * Note, the chacha C files that we have, have a compile time option for 23*9d12795fSRobert Mustacchi * generating a keystream only. eg. in other words -DKEYSTREAM_ONLY. If using 24*9d12795fSRobert Mustacchi * chacha, for something like arc4random, where you aren't doing encryption, 25*9d12795fSRobert Mustacchi * then you should pass -DKEYSTREAM_ONLY. If encryption is being done, then it 26*9d12795fSRobert Mustacchi * should not be defined. The main difference is basically doing another pass 27*9d12795fSRobert Mustacchi * over the data and xoring it with the generated cipher. 28*9d12795fSRobert Mustacchi */ 29*9d12795fSRobert Mustacchi 30*9d12795fSRobert Mustacchi #include <inttypes.h> 31*9d12795fSRobert Mustacchi 32*9d12795fSRobert Mustacchi #ifdef __cplusplus 33*9d12795fSRobert Mustacchi extern "C" { 34*9d12795fSRobert Mustacchi #endif 35*9d12795fSRobert Mustacchi 36*9d12795fSRobert Mustacchi typedef struct chacha_ctx { 37*9d12795fSRobert Mustacchi uint32_t chacha_input[16]; 38*9d12795fSRobert Mustacchi } chacha_ctx_t; 39*9d12795fSRobert Mustacchi 40*9d12795fSRobert Mustacchi extern void chacha_keysetup(chacha_ctx_t *, const uint8_t *, uint32_t, 41*9d12795fSRobert Mustacchi uint32_t); 42*9d12795fSRobert Mustacchi extern void chacha_ivsetup(chacha_ctx_t *, const uint8_t *); 43*9d12795fSRobert Mustacchi extern void chacha_encrypt_bytes(chacha_ctx_t *, const uint8_t *, uint8_t *, 44*9d12795fSRobert Mustacchi uint32_t); 45*9d12795fSRobert Mustacchi 46*9d12795fSRobert Mustacchi #ifdef __cplusplus 47*9d12795fSRobert Mustacchi } 48*9d12795fSRobert Mustacchi #endif 49*9d12795fSRobert Mustacchi 50*9d12795fSRobert Mustacchi #endif /* _CHACHA_H */ 51