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include/crypto/chacha20poly1305.h 1.66 KB
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ed20078b7   Ard Biesheuvel   crypto: chacha20p... 
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  /* SPDX-License-Identifier: GPL-2.0 OR MIT */
  /*
   * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
   */
  
  #ifndef __CHACHA20POLY1305_H
  #define __CHACHA20POLY1305_H
  
  #include <linux/types.h>
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  #include <linux/scatterlist.h>
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  enum chacha20poly1305_lengths {
  	XCHACHA20POLY1305_NONCE_SIZE = 24,
  	CHACHA20POLY1305_KEY_SIZE = 32,
  	CHACHA20POLY1305_AUTHTAG_SIZE = 16
  };
  
  void chacha20poly1305_encrypt(u8 *dst, const u8 *src, const size_t src_len,
  			      const u8 *ad, const size_t ad_len,
  			      const u64 nonce,
  			      const u8 key[CHACHA20POLY1305_KEY_SIZE]);
  
  bool __must_check
  chacha20poly1305_decrypt(u8 *dst, const u8 *src, const size_t src_len,
  			 const u8 *ad, const size_t ad_len, const u64 nonce,
  			 const u8 key[CHACHA20POLY1305_KEY_SIZE]);
  
  void xchacha20poly1305_encrypt(u8 *dst, const u8 *src, const size_t src_len,
  			       const u8 *ad, const size_t ad_len,
  			       const u8 nonce[XCHACHA20POLY1305_NONCE_SIZE],
  			       const u8 key[CHACHA20POLY1305_KEY_SIZE]);
  
  bool __must_check xchacha20poly1305_decrypt(
  	u8 *dst, const u8 *src, const size_t src_len, const u8 *ad,
  	const size_t ad_len, const u8 nonce[XCHACHA20POLY1305_NONCE_SIZE],
  	const u8 key[CHACHA20POLY1305_KEY_SIZE]);
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  bool chacha20poly1305_encrypt_sg_inplace(struct scatterlist *src, size_t src_len,
  					 const u8 *ad, const size_t ad_len,
  					 const u64 nonce,
  					 const u8 key[CHACHA20POLY1305_KEY_SIZE]);
  
  bool chacha20poly1305_decrypt_sg_inplace(struct scatterlist *src, size_t src_len,
  					 const u8 *ad, const size_t ad_len,
  					 const u64 nonce,
  					 const u8 key[CHACHA20POLY1305_KEY_SIZE]);
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  bool chacha20poly1305_selftest(void);
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  #endif /* __CHACHA20POLY1305_H */