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s390: add missing module.h/export.h includes
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1/*
2 * Cryptographic API.
3 *
4 * s390 generic implementation of the SHA Secure Hash Algorithms.
5 *
6 * Copyright IBM Corp. 2007
7 * Author(s): Jan Glauber (jang@de.ibm.com)
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
12 * any later version.
13 *
14 */
15
563f346d 16#include <crypto/internal/hash.h>
3a4c5d59 17#include <linux/module.h>
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18#include "sha.h"
19#include "crypt_s390.h"
20
563f346d 21int s390_sha_update(struct shash_desc *desc, const u8 *data, unsigned int len)
604973f1 22{
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23 struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
24 unsigned int bsize = crypto_shash_blocksize(desc->tfm);
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25 unsigned int index;
26 int ret;
27
28 /* how much is already in the buffer? */
29 index = ctx->count & (bsize - 1);
30 ctx->count += len;
31
32 if ((index + len) < bsize)
33 goto store;
34
35 /* process one stored block */
36 if (index) {
37 memcpy(ctx->buf + index, data, bsize - index);
38 ret = crypt_s390_kimd(ctx->func, ctx->state, ctx->buf, bsize);
39 BUG_ON(ret != bsize);
40 data += bsize - index;
41 len -= bsize - index;
9d20b571 42 index = 0;
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43 }
44
45 /* process as many blocks as possible */
46 if (len >= bsize) {
47 ret = crypt_s390_kimd(ctx->func, ctx->state, data,
48 len & ~(bsize - 1));
49 BUG_ON(ret != (len & ~(bsize - 1)));
50 data += ret;
51 len -= ret;
52 }
53store:
54 if (len)
55 memcpy(ctx->buf + index , data, len);
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56
57 return 0;
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58}
59EXPORT_SYMBOL_GPL(s390_sha_update);
60
563f346d 61int s390_sha_final(struct shash_desc *desc, u8 *out)
604973f1 62{
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63 struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
64 unsigned int bsize = crypto_shash_blocksize(desc->tfm);
604973f1 65 u64 bits;
291dc7c0 66 unsigned int index, end, plen;
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67 int ret;
68
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69 /* SHA-512 uses 128 bit padding length */
70 plen = (bsize > SHA256_BLOCK_SIZE) ? 16 : 8;
71
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72 /* must perform manual padding */
73 index = ctx->count & (bsize - 1);
291dc7c0 74 end = (index < bsize - plen) ? bsize : (2 * bsize);
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75
76 /* start pad with 1 */
77 ctx->buf[index] = 0x80;
78 index++;
79
80 /* pad with zeros */
81 memset(ctx->buf + index, 0x00, end - index - 8);
82
291dc7c0 83 /*
1537a363 84 * Append message length. Well, SHA-512 wants a 128 bit length value,
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85 * nevertheless we use u64, should be enough for now...
86 */
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87 bits = ctx->count * 8;
88 memcpy(ctx->buf + end - 8, &bits, sizeof(bits));
89
90 ret = crypt_s390_kimd(ctx->func, ctx->state, ctx->buf, end);
91 BUG_ON(ret != end);
92
93 /* copy digest to out */
563f346d 94 memcpy(out, ctx->state, crypto_shash_digestsize(desc->tfm));
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95 /* wipe context */
96 memset(ctx, 0, sizeof *ctx);
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97
98 return 0;
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99}
100EXPORT_SYMBOL_GPL(s390_sha_final);
101
102MODULE_LICENSE("GPL");
103MODULE_DESCRIPTION("s390 SHA cipher common functions");