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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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 * Cryptographic API.
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 *
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 * s390 generic implementation of the SHA Secure Hash Algorithms.
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 *
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 * Copyright IBM Corp. 2007
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 * Author(s): Jan Glauber ([email protected])
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 */
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#ifndef _CRYPTO_ARCH_S390_SHA_H
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#define _CRYPTO_ARCH_S390_SHA_H
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#include <crypto/hash.h>
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#include <crypto/sha2.h>
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#include <crypto/sha3.h>
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#include <linux/build_bug.h>
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#include <linux/types.h>
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/* must be big enough for the largest SHA variant */
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#define CPACF_MAX_PARMBLOCK_SIZE	SHA3_STATE_SIZE
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#define SHA_MAX_BLOCK_SIZE		SHA3_224_BLOCK_SIZE
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struct s390_sha_ctx {
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	u64 count;		/* message length in bytes */
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	union {
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		u32 state[CPACF_MAX_PARMBLOCK_SIZE / sizeof(u32)];
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		struct {
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			u64 state[SHA512_DIGEST_SIZE / sizeof(u64)];
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			u64 count_hi;
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		} sha512;
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		struct {
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			__le64 state[SHA3_STATE_SIZE / sizeof(u64)];
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		} sha3;
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	};
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	int func;		/* KIMD function to use */
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	bool first_message_part;
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};
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struct shash_desc;
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int s390_sha_update_blocks(struct shash_desc *desc, const u8 *data,
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			   unsigned int len);
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int s390_sha_finup(struct shash_desc *desc, const u8 *src, unsigned int len,
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		   u8 *out);
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static inline void __check_s390_sha_ctx_size(void)
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{
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	BUILD_BUG_ON(S390_SHA_CTX_SIZE != sizeof(struct s390_sha_ctx));
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}
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#endif
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