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c7d4d259b7
The CPACF instructions are going be used in KVM as well, move the defines and the inline functions from arch/s390/crypt/crypt_s390.h to arch/s390/include/asm. Rename the header to cpacf.h and replace the crypt_s390_xxx names with cpacf_xxx. While we are at it, cleanup the header as well. The encoding for the CPACF operations is odd, there is an enum for each of the CPACF instructions with the hardware function code in the lower 8 bits of each entry and a software defined number for the CPACF instruction in the upper 8 bits. Remove the superfluous software number and replace the enums with simple defines. The crypt_s390_func_available() function tests for the presence of a specific CPACF operations. The new name of the function is cpacf_query and it works slightly different than before. It gets passed an opcode of an CPACF instruction and a function code for this instruction. The facility_mask parameter is gone, the opcode is used to find the correct MSA facility bit to check if the CPACF instruction itself is available. If it is the query function of the given instruction is used to test if the requested CPACF operation is present. Acked-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
/*
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* Cryptographic API.
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*
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* s390 implementation of the SHA1 Secure Hash Algorithm.
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*
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* Derived from cryptoapi implementation, adapted for in-place
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* scatterlist interface. Originally based on the public domain
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* implementation written by Steve Reid.
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*
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* s390 Version:
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* Copyright IBM Corp. 2003, 2007
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* Author(s): Thomas Spatzier
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* Jan Glauber (jan.glauber@de.ibm.com)
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*
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* Derived from "crypto/sha1_generic.c"
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* Copyright (c) Alan Smithee.
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/cpufeature.h>
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#include <crypto/sha.h>
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#include <asm/cpacf.h>
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#include "sha.h"
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static int sha1_init(struct shash_desc *desc)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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sctx->state[0] = SHA1_H0;
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sctx->state[1] = SHA1_H1;
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sctx->state[2] = SHA1_H2;
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sctx->state[3] = SHA1_H3;
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sctx->state[4] = SHA1_H4;
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sctx->count = 0;
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sctx->func = CPACF_KIMD_SHA_1;
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return 0;
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}
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static int sha1_export(struct shash_desc *desc, void *out)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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struct sha1_state *octx = out;
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octx->count = sctx->count;
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memcpy(octx->state, sctx->state, sizeof(octx->state));
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memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer));
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return 0;
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}
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static int sha1_import(struct shash_desc *desc, const void *in)
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{
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struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
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const struct sha1_state *ictx = in;
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sctx->count = ictx->count;
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memcpy(sctx->state, ictx->state, sizeof(ictx->state));
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memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer));
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sctx->func = CPACF_KIMD_SHA_1;
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return 0;
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}
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static struct shash_alg alg = {
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.digestsize = SHA1_DIGEST_SIZE,
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.init = sha1_init,
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.update = s390_sha_update,
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.final = s390_sha_final,
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.export = sha1_export,
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.import = sha1_import,
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.descsize = sizeof(struct s390_sha_ctx),
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.statesize = sizeof(struct sha1_state),
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.base = {
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.cra_name = "sha1",
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.cra_driver_name= "sha1-s390",
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.cra_priority = 300,
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.cra_flags = CRYPTO_ALG_TYPE_SHASH,
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.cra_blocksize = SHA1_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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};
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static int __init sha1_s390_init(void)
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{
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if (!cpacf_query(CPACF_KIMD, CPACF_KIMD_SHA_1))
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return -EOPNOTSUPP;
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return crypto_register_shash(&alg);
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}
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static void __exit sha1_s390_fini(void)
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{
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crypto_unregister_shash(&alg);
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}
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module_cpu_feature_match(MSA, sha1_s390_init);
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module_exit(sha1_s390_fini);
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MODULE_ALIAS_CRYPTO("sha1");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
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