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authorBenjamin Gilbert <bgilbert@cs.cmu.edu>2009-10-18 23:53:37 -0400
committerHerbert Xu <herbert@gondor.apana.org.au>2009-10-18 23:53:37 -0400
commit2141b6309b1fce535329c195cb5e5274a4c84ebc (patch)
tree5dc296c523fdb6e7c3be187fe4675746e8909943 /crypto
parent667b6294bf088445996c8395b723ae9c9467e72b (diff)
crypto: hash - Remove legacy hash/digest code
6941c3a0 disabled compilation of the legacy digest code but didn't actually remove it. Rectify this. Also, remove the crypto_hash_type extern declaration from algapi.h now that the struct is gone. Signed-off-by: Benjamin Gilbert <bgilbert@cs.cmu.edu> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/digest.c240
-rw-r--r--crypto/hash.c183
2 files changed, 0 insertions, 423 deletions
diff --git a/crypto/digest.c b/crypto/digest.c
deleted file mode 100644
index 5d3f1303da98..000000000000
--- a/crypto/digest.c
+++ /dev/null
@@ -1,240 +0,0 @@
1/*
2 * Cryptographic API.
3 *
4 * Digest operations.
5 *
6 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
11 * any later version.
12 *
13 */
14
15#include <crypto/internal/hash.h>
16#include <crypto/scatterwalk.h>
17#include <linux/mm.h>
18#include <linux/errno.h>
19#include <linux/hardirq.h>
20#include <linux/highmem.h>
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/scatterlist.h>
24
25#include "internal.h"
26
27static int init(struct hash_desc *desc)
28{
29 struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm);
30
31 tfm->__crt_alg->cra_digest.dia_init(tfm);
32 return 0;
33}
34
35static int update2(struct hash_desc *desc,
36 struct scatterlist *sg, unsigned int nbytes)
37{
38 struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm);
39 unsigned int alignmask = crypto_tfm_alg_alignmask(tfm);
40
41 if (!nbytes)
42 return 0;
43
44 for (;;) {
45 struct page *pg = sg_page(sg);
46 unsigned int offset = sg->offset;
47 unsigned int l = sg->length;
48
49 if (unlikely(l > nbytes))
50 l = nbytes;
51 nbytes -= l;
52
53 do {
54 unsigned int bytes_from_page = min(l, ((unsigned int)
55 (PAGE_SIZE)) -
56 offset);
57 char *src = crypto_kmap(pg, 0);
58 char *p = src + offset;
59
60 if (unlikely(offset & alignmask)) {
61 unsigned int bytes =
62 alignmask + 1 - (offset & alignmask);
63 bytes = min(bytes, bytes_from_page);
64 tfm->__crt_alg->cra_digest.dia_update(tfm, p,
65 bytes);
66 p += bytes;
67 bytes_from_page -= bytes;
68 l -= bytes;
69 }
70 tfm->__crt_alg->cra_digest.dia_update(tfm, p,
71 bytes_from_page);
72 crypto_kunmap(src, 0);
73 crypto_yield(desc->flags);
74 offset = 0;
75 pg++;
76 l -= bytes_from_page;
77 } while (l > 0);
78
79 if (!nbytes)
80 break;
81 sg = scatterwalk_sg_next(sg);
82 }
83
84 return 0;
85}
86
87static int update(struct hash_desc *desc,
88 struct scatterlist *sg, unsigned int nbytes)
89{
90 if (WARN_ON_ONCE(in_irq()))
91 return -EDEADLK;
92 return update2(desc, sg, nbytes);
93}
94
95static int final(struct hash_desc *desc, u8 *out)
96{
97 struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm);
98 unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
99 struct digest_alg *digest = &tfm->__crt_alg->cra_digest;
100
101 if (unlikely((unsigned long)out & alignmask)) {
102 unsigned long align = alignmask + 1;
103 unsigned long addr = (unsigned long)crypto_tfm_ctx(tfm);
104 u8 *dst = (u8 *)ALIGN(addr, align) +
105 ALIGN(tfm->__crt_alg->cra_ctxsize, align);
106
107 digest->dia_final(tfm, dst);
108 memcpy(out, dst, digest->dia_digestsize);
109 } else
110 digest->dia_final(tfm, out);
111
112 return 0;
113}
114
115static int nosetkey(struct crypto_hash *tfm, const u8 *key, unsigned int keylen)
116{
117 crypto_hash_clear_flags(tfm, CRYPTO_TFM_RES_MASK);
118 return -ENOSYS;
119}
120
121static int setkey(struct crypto_hash *hash, const u8 *key, unsigned int keylen)
122{
123 struct crypto_tfm *tfm = crypto_hash_tfm(hash);
124
125 crypto_hash_clear_flags(hash, CRYPTO_TFM_RES_MASK);
126 return tfm->__crt_alg->cra_digest.dia_setkey(tfm, key, keylen);
127}
128
129static int digest(struct hash_desc *desc,
130 struct scatterlist *sg, unsigned int nbytes, u8 *out)
131{
132 if (WARN_ON_ONCE(in_irq()))
133 return -EDEADLK;
134
135 init(desc);
136 update2(desc, sg, nbytes);
137 return final(desc, out);
138}
139
140int crypto_init_digest_ops(struct crypto_tfm *tfm)
141{
142 struct hash_tfm *ops = &tfm->crt_hash;
143 struct digest_alg *dalg = &tfm->__crt_alg->cra_digest;
144
145 if (dalg->dia_digestsize > PAGE_SIZE / 8)
146 return -EINVAL;
147
148 ops->init = init;
149 ops->update = update;
150 ops->final = final;
151 ops->digest = digest;
152 ops->setkey = dalg->dia_setkey ? setkey : nosetkey;
153 ops->digestsize = dalg->dia_digestsize;
154
155 return 0;
156}
157
158void crypto_exit_digest_ops(struct crypto_tfm *tfm)
159{
160}
161
162static int digest_async_nosetkey(struct crypto_ahash *tfm_async, const u8 *key,
163 unsigned int keylen)
164{
165 crypto_ahash_clear_flags(tfm_async, CRYPTO_TFM_RES_MASK);
166 return -ENOSYS;
167}
168
169static int digest_async_setkey(struct crypto_ahash *tfm_async, const u8 *key,
170 unsigned int keylen)
171{
172 struct crypto_tfm *tfm = crypto_ahash_tfm(tfm_async);
173 struct digest_alg *dalg = &tfm->__crt_alg->cra_digest;
174
175 crypto_ahash_clear_flags(tfm_async, CRYPTO_TFM_RES_MASK);
176 return dalg->dia_setkey(tfm, key, keylen);
177}
178
179static int digest_async_init(struct ahash_request *req)
180{
181 struct crypto_tfm *tfm = req->base.tfm;
182 struct digest_alg *dalg = &tfm->__crt_alg->cra_digest;
183
184 dalg->dia_init(tfm);
185 return 0;
186}
187
188static int digest_async_update(struct ahash_request *req)
189{
190 struct crypto_tfm *tfm = req->base.tfm;
191 struct hash_desc desc = {
192 .tfm = __crypto_hash_cast(tfm),
193 .flags = req->base.flags,
194 };
195
196 update(&desc, req->src, req->nbytes);
197 return 0;
198}
199
200static int digest_async_final(struct ahash_request *req)
201{
202 struct crypto_tfm *tfm = req->base.tfm;
203 struct hash_desc desc = {
204 .tfm = __crypto_hash_cast(tfm),
205 .flags = req->base.flags,
206 };
207
208 final(&desc, req->result);
209 return 0;
210}
211
212static int digest_async_digest(struct ahash_request *req)
213{
214 struct crypto_tfm *tfm = req->base.tfm;
215 struct hash_desc desc = {
216 .tfm = __crypto_hash_cast(tfm),
217 .flags = req->base.flags,
218 };
219
220 return digest(&desc, req->src, req->nbytes, req->result);
221}
222
223int crypto_init_digest_ops_async(struct crypto_tfm *tfm)
224{
225 struct ahash_tfm *crt = &tfm->crt_ahash;
226 struct digest_alg *dalg = &tfm->__crt_alg->cra_digest;
227
228 if (dalg->dia_digestsize > PAGE_SIZE / 8)
229 return -EINVAL;
230
231 crt->init = digest_async_init;
232 crt->update = digest_async_update;
233 crt->final = digest_async_final;
234 crt->digest = digest_async_digest;
235 crt->setkey = dalg->dia_setkey ? digest_async_setkey :
236 digest_async_nosetkey;
237 crt->digestsize = dalg->dia_digestsize;
238
239 return 0;
240}
diff --git a/crypto/hash.c b/crypto/hash.c
deleted file mode 100644
index cb86b19fd105..000000000000
--- a/crypto/hash.c
+++ /dev/null
@@ -1,183 +0,0 @@
1/*
2 * Cryptographic Hash operations.
3 *
4 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation; either version 2 of the License, or (at your option)
9 * any later version.
10 */
11
12#include <crypto/internal/hash.h>
13#include <linux/errno.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/seq_file.h>
18
19#include "internal.h"
20
21static unsigned int crypto_hash_ctxsize(struct crypto_alg *alg, u32 type,
22 u32 mask)
23{
24 return alg->cra_ctxsize;
25}
26
27static int hash_setkey_unaligned(struct crypto_hash *crt, const u8 *key,
28 unsigned int keylen)
29{
30 struct crypto_tfm *tfm = crypto_hash_tfm(crt);
31 struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
32 unsigned long alignmask = crypto_hash_alignmask(crt);
33 int ret;
34 u8 *buffer, *alignbuffer;
35 unsigned long absize;
36
37 absize = keylen + alignmask;
38 buffer = kmalloc(absize, GFP_ATOMIC);
39 if (!buffer)
40 return -ENOMEM;
41
42 alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
43 memcpy(alignbuffer, key, keylen);
44 ret = alg->setkey(crt, alignbuffer, keylen);
45 memset(alignbuffer, 0, keylen);
46 kfree(buffer);
47 return ret;
48}
49
50static int hash_setkey(struct crypto_hash *crt, const u8 *key,
51 unsigned int keylen)
52{
53 struct crypto_tfm *tfm = crypto_hash_tfm(crt);
54 struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
55 unsigned long alignmask = crypto_hash_alignmask(crt);
56
57 if ((unsigned long)key & alignmask)
58 return hash_setkey_unaligned(crt, key, keylen);
59
60 return alg->setkey(crt, key, keylen);
61}
62
63static int hash_async_setkey(struct crypto_ahash *tfm_async, const u8 *key,
64 unsigned int keylen)
65{
66 struct crypto_tfm *tfm = crypto_ahash_tfm(tfm_async);
67 struct crypto_hash *tfm_hash = __crypto_hash_cast(tfm);
68 struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
69
70 return alg->setkey(tfm_hash, key, keylen);
71}
72
73static int hash_async_init(struct ahash_request *req)
74{
75 struct crypto_tfm *tfm = req->base.tfm;
76 struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
77 struct hash_desc desc = {
78 .tfm = __crypto_hash_cast(tfm),
79 .flags = req->base.flags,
80 };
81
82 return alg->init(&desc);
83}
84
85static int hash_async_update(struct ahash_request *req)
86{
87 struct crypto_tfm *tfm = req->base.tfm;
88 struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
89 struct hash_desc desc = {
90 .tfm = __crypto_hash_cast(tfm),
91 .flags = req->base.flags,
92 };
93
94 return alg->update(&desc, req->src, req->nbytes);
95}
96
97static int hash_async_final(struct ahash_request *req)
98{
99 struct crypto_tfm *tfm = req->base.tfm;
100 struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
101 struct hash_desc desc = {
102 .tfm = __crypto_hash_cast(tfm),
103 .flags = req->base.flags,
104 };
105
106 return alg->final(&desc, req->result);
107}
108
109static int hash_async_digest(struct ahash_request *req)
110{
111 struct crypto_tfm *tfm = req->base.tfm;
112 struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
113 struct hash_desc desc = {
114 .tfm = __crypto_hash_cast(tfm),
115 .flags = req->base.flags,
116 };
117
118 return alg->digest(&desc, req->src, req->nbytes, req->result);
119}
120
121static int crypto_init_hash_ops_async(struct crypto_tfm *tfm)
122{
123 struct ahash_tfm *crt = &tfm->crt_ahash;
124 struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
125
126 crt->init = hash_async_init;
127 crt->update = hash_async_update;
128 crt->final = hash_async_final;
129 crt->digest = hash_async_digest;
130 crt->setkey = hash_async_setkey;
131 crt->digestsize = alg->digestsize;
132
133 return 0;
134}
135
136static int crypto_init_hash_ops_sync(struct crypto_tfm *tfm)
137{
138 struct hash_tfm *crt = &tfm->crt_hash;
139 struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
140
141 crt->init = alg->init;
142 crt->update = alg->update;
143 crt->final = alg->final;
144 crt->digest = alg->digest;
145 crt->setkey = hash_setkey;
146 crt->digestsize = alg->digestsize;
147
148 return 0;
149}
150
151static int crypto_init_hash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
152{
153 struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
154
155 if (alg->digestsize > PAGE_SIZE / 8)
156 return -EINVAL;
157
158 if ((mask & CRYPTO_ALG_TYPE_HASH_MASK) != CRYPTO_ALG_TYPE_HASH_MASK)
159 return crypto_init_hash_ops_async(tfm);
160 else
161 return crypto_init_hash_ops_sync(tfm);
162}
163
164static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg)
165 __attribute__ ((unused));
166static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg)
167{
168 seq_printf(m, "type : hash\n");
169 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
170 seq_printf(m, "digestsize : %u\n", alg->cra_hash.digestsize);
171}
172
173const struct crypto_type crypto_hash_type = {
174 .ctxsize = crypto_hash_ctxsize,
175 .init = crypto_init_hash_ops,
176#ifdef CONFIG_PROC_FS
177 .show = crypto_hash_show,
178#endif
179};
180EXPORT_SYMBOL_GPL(crypto_hash_type);
181
182MODULE_LICENSE("GPL");
183MODULE_DESCRIPTION("Generic cryptographic hash type");
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