1 /******************************************************************************
3 ** FILE NAME : ifxmips_sha1.c
5 ** MODULES : DEU Module for Danube
7 ** DATE : September 8, 2009
8 ** AUTHOR : Mohammad Firdaus
9 ** DESCRIPTION : Data Encryption Unit Driver
10 ** COPYRIGHT : Copyright (c) 2009
11 ** Infineon Technologies AG
12 ** Am Campeon 1-12, 85579 Neubiberg, Germany
14 ** This program is free software; you can redistribute it and/or modify
15 ** it under the terms of the GNU General Public License as published by
16 ** the Free Software Foundation; either version 2 of the License, or
17 ** (at your option) any later version.
20 ** $Date $Author $Comment
21 ** 08,Sept 2009 Mohammad Firdaus Initial UEIP release
22 *******************************************************************************/
24 \defgroup IFX_DEU IFX_DEU_DRIVERS
26 \brief ifx deu driver module
32 \brief SHA1 encryption deu driver file
36 \defgroup IFX_SHA1_FUNCTIONS IFX_SHA1_FUNCTIONS
38 \brief ifx deu sha1 functions
43 #include <linux/init.h>
44 #include <linux/module.h>
46 #include <linux/crypto.h>
47 #include <linux/cryptohash.h>
48 #include <crypto/sha.h>
49 #include <crypto/internal/hash.h>
50 #include <linux/types.h>
51 #include <linux/scatterlist.h>
52 #include <asm/byteorder.h>
54 #if defined(CONFIG_DANUBE)
55 #include "ifxmips_deu_danube.h"
56 #elif defined(CONFIG_AR9)
57 #include "ifxmips_deu_ar9.h"
58 #elif defined(CONFIG_VR9) || defined(CONFIG_AR10)
59 #include "ifxmips_deu_vr9.h"
61 #error "Plaform Unknwon!"
64 #define SHA1_DIGEST_SIZE 20
65 #define SHA1_HMAC_BLOCK_SIZE 64
66 #define HASH_START IFX_HASH_CON
68 static spinlock_t lock
;
69 #define CRTCL_SECT_INIT spin_lock_init(&lock)
70 #define CRTCL_SECT_START spin_lock_irqsave(&lock, flag)
71 #define CRTCL_SECT_END spin_unlock_irqrestore(&lock, flag)
73 //#define CRYPTO_DEBUG
75 extern char debug_level
;
76 #define DPRINTF(level, format, args...) if (level < debug_level) printk(KERN_INFO "[%s %s %d]: " format, __FILE__, __func__, __LINE__, ##args);
78 #define DPRINTF(level, format, args...)
82 * \brief SHA1 private structure
92 extern int disable_deudma
;
95 /*! \fn static void sha1_transform (u32 *state, const u32 *in)
96 * \ingroup IFX_SHA1_FUNCTIONS
97 * \brief main interface to sha1 hardware
98 * \param state current state
99 * \param in 64-byte block of input
101 static void sha1_transform (struct sha1_ctx
*sctx
, u32
*state
, const u32
*in
)
104 volatile struct deu_hash_t
*hashs
= (struct deu_hash_t
*) HASH_START
;
109 /* For context switching purposes, the previous hash output
110 * is loaded back into the output register
113 hashs
->D1R
= *((u32
*) sctx
->hash
+ 0);
114 hashs
->D2R
= *((u32
*) sctx
->hash
+ 1);
115 hashs
->D3R
= *((u32
*) sctx
->hash
+ 2);
116 hashs
->D4R
= *((u32
*) sctx
->hash
+ 3);
117 hashs
->D5R
= *((u32
*) sctx
->hash
+ 4);
120 for (i
= 0; i
< 16; i
++) {
124 //wait for processing
125 while (hashs
->controlr
.BSY
) {
126 // this will not take long
129 /* For context switching purposes, the output is saved into a
130 * context struct which can be used later on
132 *((u32
*) sctx
->hash
+ 0) = hashs
->D1R
;
133 *((u32
*) sctx
->hash
+ 1) = hashs
->D2R
;
134 *((u32
*) sctx
->hash
+ 2) = hashs
->D3R
;
135 *((u32
*) sctx
->hash
+ 3) = hashs
->D4R
;
136 *((u32
*) sctx
->hash
+ 4) = hashs
->D5R
;
143 /*! \fn static void sha1_init(struct crypto_tfm *tfm)
144 * \ingroup IFX_SHA1_FUNCTIONS
145 * \brief initialize sha1 hardware
146 * \param tfm linux crypto algo transform
148 static int sha1_init(struct shash_desc
*desc
)
150 struct sha1_ctx
*sctx
= shash_desc_ctx(desc
);
159 /*! \fn static void sha1_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len)
160 * \ingroup IFX_SHA1_FUNCTIONS
161 * \brief on-the-fly sha1 computation
162 * \param tfm linux crypto algo transform
163 * \param data input data
164 * \param len size of input data
166 static int sha1_update(struct shash_desc
* desc
, const u8
*data
,
169 struct sha1_ctx
*sctx
= shash_desc_ctx(desc
);
172 j
= (sctx
->count
>> 3) & 0x3f;
173 sctx
->count
+= len
<< 3;
175 if ((j
+ len
) > 63) {
176 memcpy (&sctx
->buffer
[j
], data
, (i
= 64 - j
));
177 sha1_transform (sctx
, sctx
->state
, (const u32
*)sctx
->buffer
);
178 for (; i
+ 63 < len
; i
+= 64) {
179 sha1_transform (sctx
, sctx
->state
, (const u32
*)&data
[i
]);
187 memcpy (&sctx
->buffer
[j
], &data
[i
], len
- i
);
191 /*! \fn static void sha1_final(struct crypto_tfm *tfm, u8 *out)
192 * \ingroup IFX_SHA1_FUNCTIONS
193 * \brief compute final sha1 value
194 * \param tfm linux crypto algo transform
195 * \param out final md5 output value
197 static int sha1_final(struct shash_desc
*desc
, u8
*out
)
199 struct sha1_ctx
*sctx
= shash_desc_ctx(desc
);
203 static const u8 padding
[64] = { 0x80, };
204 volatile struct deu_hash_t
*hashs
= (struct deu_hash_t
*) HASH_START
;
224 /* Pad out to 56 mod 64 */
225 index
= (sctx
->count
>> 3) & 0x3f;
226 padlen
= (index
< 56) ? (56 - index
) : ((64 + 56) - index
);
227 sha1_update (desc
, padding
, padlen
);
230 sha1_update (desc
, bits
, sizeof bits
);
234 *((u32
*) out
+ 0) = hashs
->D1R
;
235 *((u32
*) out
+ 1) = hashs
->D2R
;
236 *((u32
*) out
+ 2) = hashs
->D3R
;
237 *((u32
*) out
+ 3) = hashs
->D4R
;
238 *((u32
*) out
+ 4) = hashs
->D5R
;
243 memset (sctx
, 0, sizeof *sctx
);
249 * \brief SHA1 function mappings
251 static struct shash_alg ifxdeu_sha1_alg
= {
252 .digestsize
= SHA1_DIGEST_SIZE
,
254 .update
= sha1_update
,
256 .descsize
= sizeof(struct sha1_ctx
),
257 .statesize
= sizeof(struct sha1_state
),
260 .cra_driver_name
= "ifxdeu-sha1",
262 .cra_flags
= CRYPTO_ALG_TYPE_DIGEST
,
263 .cra_blocksize
= SHA1_HMAC_BLOCK_SIZE
,
264 .cra_module
= THIS_MODULE
,
269 /*! \fn int ifxdeu_init_sha1 (void)
270 * \ingroup IFX_SHA1_FUNCTIONS
271 * \brief initialize sha1 driver
273 int ifxdeu_init_sha1 (void)
278 if ((ret
= crypto_register_shash(&ifxdeu_sha1_alg
)))
283 printk (KERN_NOTICE
"IFX DEU SHA1 initialized%s.\n", disable_deudma
? "" : " (DMA)");
287 printk(KERN_ERR
"IFX DEU SHA1 initialization failed!\n");
291 /*! \fn void ifxdeu_fini_sha1 (void)
292 * \ingroup IFX_SHA1_FUNCTIONS
293 * \brief unregister sha1 driver
295 void ifxdeu_fini_sha1 (void)
297 crypto_unregister_shash(&ifxdeu_sha1_alg
);