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 <asm/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",
261 .cra_flags = CRYPTO_ALG_TYPE_DIGEST,
262 .cra_blocksize = SHA1_HMAC_BLOCK_SIZE,
263 .cra_module = THIS_MODULE,
268 /*! \fn int __init ifxdeu_init_sha1 (void)
269 * \ingroup IFX_SHA1_FUNCTIONS
270 * \brief initialize sha1 driver
272 int __init ifxdeu_init_sha1 (void)
277 if ((ret = crypto_register_shash(&ifxdeu_sha1_alg)))
282 printk (KERN_NOTICE "IFX DEU SHA1 initialized%s.\n", disable_deudma ? "" : " (DMA)");
286 printk(KERN_ERR "IFX DEU SHA1 initialization failed!\n");
290 /*! \fn void __exit ifxdeu_fini_sha1 (void)
291 * \ingroup IFX_SHA1_FUNCTIONS
292 * \brief unregister sha1 driver
294 void __exit ifxdeu_fini_sha1 (void)
296 crypto_unregister_shash(&ifxdeu_sha1_alg);