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authorAdrian-Ken Rueegsegger <ken@codelabs.ch>2008-12-07 06:35:38 -0500
committerHerbert Xu <herbert@gondor.apana.org.au>2008-12-24 19:02:24 -0500
commit19e2bf146759aea38fd6c2daea08cb7a6367149b (patch)
treeb8b49a02dc72ddf29f36bbfdc3d80056a64aea09
parent4946510baac6aaa8658528e3deefc7e9ba2951a9 (diff)
crypto: michael_mic - Switch to shash
This patch changes michael_mic to the new shash interface. Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--crypto/Kconfig2
-rw-r--r--crypto/michael_mic.c72
2 files changed, 42 insertions, 32 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index bc29216aaada..3f88a526d2da 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -288,7 +288,7 @@ config CRYPTO_MD5
288 288
289config CRYPTO_MICHAEL_MIC 289config CRYPTO_MICHAEL_MIC
290 tristate "Michael MIC keyed digest algorithm" 290 tristate "Michael MIC keyed digest algorithm"
291 select CRYPTO_ALGAPI 291 select CRYPTO_HASH
292 help 292 help
293 Michael MIC is used for message integrity protection in TKIP 293 Michael MIC is used for message integrity protection in TKIP
294 (IEEE 802.11i). This algorithm is required for TKIP, but it 294 (IEEE 802.11i). This algorithm is required for TKIP, but it
diff --git a/crypto/michael_mic.c b/crypto/michael_mic.c
index 9e917b8011b1..079b761bc70d 100644
--- a/crypto/michael_mic.c
+++ b/crypto/michael_mic.c
@@ -9,23 +9,25 @@
9 * it under the terms of the GNU General Public License version 2 as 9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation. 10 * published by the Free Software Foundation.
11 */ 11 */
12 12#include <crypto/internal/hash.h>
13#include <asm/byteorder.h> 13#include <asm/byteorder.h>
14#include <linux/init.h> 14#include <linux/init.h>
15#include <linux/module.h> 15#include <linux/module.h>
16#include <linux/string.h> 16#include <linux/string.h>
17#include <linux/crypto.h>
18#include <linux/types.h> 17#include <linux/types.h>
19 18
20 19
21struct michael_mic_ctx { 20struct michael_mic_ctx {
21 u32 l, r;
22};
23
24struct michael_mic_desc_ctx {
22 u8 pending[4]; 25 u8 pending[4];
23 size_t pending_len; 26 size_t pending_len;
24 27
25 u32 l, r; 28 u32 l, r;
26}; 29};
27 30
28
29static inline u32 xswap(u32 val) 31static inline u32 xswap(u32 val)
30{ 32{
31 return ((val & 0x00ff00ff) << 8) | ((val & 0xff00ff00) >> 8); 33 return ((val & 0x00ff00ff) << 8) | ((val & 0xff00ff00) >> 8);
@@ -45,17 +47,22 @@ do { \
45} while (0) 47} while (0)
46 48
47 49
48static void michael_init(struct crypto_tfm *tfm) 50static int michael_init(struct shash_desc *desc)
49{ 51{
50 struct michael_mic_ctx *mctx = crypto_tfm_ctx(tfm); 52 struct michael_mic_desc_ctx *mctx = shash_desc_ctx(desc);
53 struct michael_mic_ctx *ctx = crypto_shash_ctx(desc->tfm);
51 mctx->pending_len = 0; 54 mctx->pending_len = 0;
55 mctx->l = ctx->l;
56 mctx->r = ctx->r;
57
58 return 0;
52} 59}
53 60
54 61
55static void michael_update(struct crypto_tfm *tfm, const u8 *data, 62static int michael_update(struct shash_desc *desc, const u8 *data,
56 unsigned int len) 63 unsigned int len)
57{ 64{
58 struct michael_mic_ctx *mctx = crypto_tfm_ctx(tfm); 65 struct michael_mic_desc_ctx *mctx = shash_desc_ctx(desc);
59 const __le32 *src; 66 const __le32 *src;
60 67
61 if (mctx->pending_len) { 68 if (mctx->pending_len) {
@@ -68,7 +75,7 @@ static void michael_update(struct crypto_tfm *tfm, const u8 *data,
68 len -= flen; 75 len -= flen;
69 76
70 if (mctx->pending_len < 4) 77 if (mctx->pending_len < 4)
71 return; 78 return 0;
72 79
73 src = (const __le32 *)mctx->pending; 80 src = (const __le32 *)mctx->pending;
74 mctx->l ^= le32_to_cpup(src); 81 mctx->l ^= le32_to_cpup(src);
@@ -88,12 +95,14 @@ static void michael_update(struct crypto_tfm *tfm, const u8 *data,
88 mctx->pending_len = len; 95 mctx->pending_len = len;
89 memcpy(mctx->pending, src, len); 96 memcpy(mctx->pending, src, len);
90 } 97 }
98
99 return 0;
91} 100}
92 101
93 102
94static void michael_final(struct crypto_tfm *tfm, u8 *out) 103static int michael_final(struct shash_desc *desc, u8 *out)
95{ 104{
96 struct michael_mic_ctx *mctx = crypto_tfm_ctx(tfm); 105 struct michael_mic_desc_ctx *mctx = shash_desc_ctx(desc);
97 u8 *data = mctx->pending; 106 u8 *data = mctx->pending;
98 __le32 *dst = (__le32 *)out; 107 __le32 *dst = (__le32 *)out;
99 108
@@ -119,17 +128,20 @@ static void michael_final(struct crypto_tfm *tfm, u8 *out)
119 128
120 dst[0] = cpu_to_le32(mctx->l); 129 dst[0] = cpu_to_le32(mctx->l);
121 dst[1] = cpu_to_le32(mctx->r); 130 dst[1] = cpu_to_le32(mctx->r);
131
132 return 0;
122} 133}
123 134
124 135
125static int michael_setkey(struct crypto_tfm *tfm, const u8 *key, 136static int michael_setkey(struct crypto_shash *tfm, const u8 *key,
126 unsigned int keylen) 137 unsigned int keylen)
127{ 138{
128 struct michael_mic_ctx *mctx = crypto_tfm_ctx(tfm); 139 struct michael_mic_ctx *mctx = crypto_shash_ctx(tfm);
140
129 const __le32 *data = (const __le32 *)key; 141 const __le32 *data = (const __le32 *)key;
130 142
131 if (keylen != 8) { 143 if (keylen != 8) {
132 tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; 144 crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
133 return -EINVAL; 145 return -EINVAL;
134 } 146 }
135 147
@@ -138,33 +150,31 @@ static int michael_setkey(struct crypto_tfm *tfm, const u8 *key,
138 return 0; 150 return 0;
139} 151}
140 152
141 153static struct shash_alg alg = {
142static struct crypto_alg michael_mic_alg = { 154 .digestsize = 8,
143 .cra_name = "michael_mic", 155 .setkey = michael_setkey,
144 .cra_flags = CRYPTO_ALG_TYPE_DIGEST, 156 .init = michael_init,
145 .cra_blocksize = 8, 157 .update = michael_update,
146 .cra_ctxsize = sizeof(struct michael_mic_ctx), 158 .final = michael_final,
147 .cra_module = THIS_MODULE, 159 .descsize = sizeof(struct michael_mic_desc_ctx),
148 .cra_alignmask = 3, 160 .base = {
149 .cra_list = LIST_HEAD_INIT(michael_mic_alg.cra_list), 161 .cra_name = "michael_mic",
150 .cra_u = { .digest = { 162 .cra_blocksize = 8,
151 .dia_digestsize = 8, 163 .cra_alignmask = 3,
152 .dia_init = michael_init, 164 .cra_ctxsize = sizeof(struct michael_mic_ctx),
153 .dia_update = michael_update, 165 .cra_module = THIS_MODULE,
154 .dia_final = michael_final, 166 }
155 .dia_setkey = michael_setkey } }
156}; 167};
157 168
158
159static int __init michael_mic_init(void) 169static int __init michael_mic_init(void)
160{ 170{
161 return crypto_register_alg(&michael_mic_alg); 171 return crypto_register_shash(&alg);
162} 172}
163 173
164 174
165static void __exit michael_mic_exit(void) 175static void __exit michael_mic_exit(void)
166{ 176{
167 crypto_unregister_alg(&michael_mic_alg); 177 crypto_unregister_shash(&alg);
168} 178}
169 179
170 180