/* SPDX-License-Identifier: GPL-2.0 */
  #ifndef _FS_CEPH_CRYPTO_H
  #define _FS_CEPH_CRYPTO_H
  
  #include <linux/ceph/types.h>
  #include <linux/ceph/buffer.h>
  
  /*
   * cryptographic secret
   */
  struct ceph_crypto_key {
  	int type;
  	struct ceph_timespec created;
  	int len;
  	void *key;
  	struct crypto_skcipher *tfm;
  };
  
  int ceph_crypto_key_clone(struct ceph_crypto_key *dst,
  			  const struct ceph_crypto_key *src);
  int ceph_crypto_key_encode(struct ceph_crypto_key *key, void **p, void *end);
  int ceph_crypto_key_decode(struct ceph_crypto_key *key, void **p, void *end);
  int ceph_crypto_key_unarmor(struct ceph_crypto_key *key, const char *in);
  void ceph_crypto_key_destroy(struct ceph_crypto_key *key);
  
  /* crypto.c */
  int ceph_crypt(const struct ceph_crypto_key *key, bool encrypt,
  	       void *buf, int buf_len, int in_len, int *pout_len);
  int ceph_crypto_init(void);
  void ceph_crypto_shutdown(void);
  
  /* armor.c */
  int ceph_armor(char *dst, const char *src, const char *end);
  int ceph_unarmor(char *dst, const char *src, const char *end);
  
  #endif