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/* SPDX-License-Identifier: BSD-3-Clause */

#ifndef PTLRPC_GSS_CRYPTO_H
#define PTLRPC_GSS_CRYPTO_H

#include <linux/scatterlist.h>

#include "gss_internal.h"

#include <crypto/skcipher.h>

struct gss_keyblock {
	rawobj_t kb_key;
	struct crypto_sync_skcipher *kb_tfm;
};

int gss_keyblock_init(struct gss_keyblock *kb, const char *alg_name,
		      const int alg_mode);
void gss_keyblock_free(struct gss_keyblock *kb);
int gss_keyblock_dup(struct gss_keyblock *new, struct gss_keyblock *kb);
int gss_get_bytes(char **ptr, const char *end, void *res, size_t len);
int gss_get_rawobj(char **ptr, const char *end, rawobj_t *res);
int gss_get_keyblock(char **ptr, const char *end, struct gss_keyblock *kb,
		     __u32 keysize);
int gss_setup_sgtable(struct sg_table *sgt, struct scatterlist *prealloc_sg,
		      const void *buf, unsigned int buf_len);
void gss_teardown_sgtable(struct sg_table *sgt);
int gss_crypt_generic(struct crypto_sync_skcipher *tfm, int decrypt,
		      const void *iv, const void *in, void *out, size_t length);
int gss_digest_hash(struct ahash_request *req, rawobj_t *hdr,
		    int msgcnt, rawobj_t *msgs, int iovcnt,
		    struct bio_vec *iovs);
int gss_digest_hash_compat(struct ahash_request *req,
			   rawobj_t *hdr, int msgcnt, rawobj_t *msgs,
			   int iovcnt, struct bio_vec *iovs);
int gss_add_padding(rawobj_t *msg, int msg_buflen, int blocksize);
int gss_crypt_rawobjs(struct crypto_sync_skcipher *tfm, __u8 *iv,
		      int inobj_cnt, rawobj_t *inobjs, rawobj_t *outobj,
		      int enc);

#endif /* PTLRPC_GSS_CRYPTO_H */