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20#include <linux/kernel.h>
21#include <linux/interrupt.h>
22#include <linux/spinlock_types.h>
23#include <linux/scatterlist.h>
24#include <linux/crypto.h>
25#include <linux/hash.h>
26#include <crypto/internal/hash.h>
27#include <linux/dma-mapping.h>
28#include <crypto/algapi.h>
29#include <crypto/aes.h>
30#include <crypto/sha.h>
31#include "crypto4xx_reg_def.h"
32#include "crypto4xx_sa.h"
33#include "crypto4xx_core.h"
34
35static void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h,
36 u32 save_iv, u32 ld_h, u32 ld_iv,
37 u32 hdr_proc, u32 h, u32 c, u32 pad_type,
38 u32 op_grp, u32 op, u32 dir)
39{
40 sa->sa_command_0.w = 0;
41 sa->sa_command_0.bf.save_hash_state = save_h;
42 sa->sa_command_0.bf.save_iv = save_iv;
43 sa->sa_command_0.bf.load_hash_state = ld_h;
44 sa->sa_command_0.bf.load_iv = ld_iv;
45 sa->sa_command_0.bf.hdr_proc = hdr_proc;
46 sa->sa_command_0.bf.hash_alg = h;
47 sa->sa_command_0.bf.cipher_alg = c;
48 sa->sa_command_0.bf.pad_type = pad_type & 3;
49 sa->sa_command_0.bf.extend_pad = pad_type >> 2;
50 sa->sa_command_0.bf.op_group = op_grp;
51 sa->sa_command_0.bf.opcode = op;
52 sa->sa_command_0.bf.dir = dir;
53}
54
55static void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm,
56 u32 hmac_mc, u32 cfb, u32 esn,
57 u32 sn_mask, u32 mute, u32 cp_pad,
58 u32 cp_pay, u32 cp_hdr)
59{
60 sa->sa_command_1.w = 0;
61 sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2;
62 sa->sa_command_1.bf.crypto_mode9_8 = cm & 3;
63 sa->sa_command_1.bf.feedback_mode = cfb,
64 sa->sa_command_1.bf.sa_rev = 1;
65 sa->sa_command_1.bf.extended_seq_num = esn;
66 sa->sa_command_1.bf.seq_num_mask = sn_mask;
67 sa->sa_command_1.bf.mutable_bit_proc = mute;
68 sa->sa_command_1.bf.copy_pad = cp_pad;
69 sa->sa_command_1.bf.copy_payload = cp_pay;
70 sa->sa_command_1.bf.copy_hdr = cp_hdr;
71}
72
73int crypto4xx_encrypt(struct ablkcipher_request *req)
74{
75 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
76
77 ctx->direction = DIR_OUTBOUND;
78 ctx->hash_final = 0;
79 ctx->is_hash = 0;
80 ctx->pd_ctl = 0x1;
81
82 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
83 req->nbytes, req->info,
84 get_dynamic_sa_iv_size(ctx));
85}
86
87int crypto4xx_decrypt(struct ablkcipher_request *req)
88{
89 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
90
91 ctx->direction = DIR_INBOUND;
92 ctx->hash_final = 0;
93 ctx->is_hash = 0;
94 ctx->pd_ctl = 1;
95
96 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
97 req->nbytes, req->info,
98 get_dynamic_sa_iv_size(ctx));
99}
100
101
102
103
104static int crypto4xx_setkey_aes(struct crypto_ablkcipher *cipher,
105 const u8 *key,
106 unsigned int keylen,
107 unsigned char cm,
108 u8 fb)
109{
110 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
111 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
112 struct dynamic_sa_ctl *sa;
113 int rc;
114
115 if (keylen != AES_KEYSIZE_256 &&
116 keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) {
117 crypto_ablkcipher_set_flags(cipher,
118 CRYPTO_TFM_RES_BAD_KEY_LEN);
119 return -EINVAL;
120 }
121
122
123 if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr)
124 crypto4xx_free_sa(ctx);
125
126 rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4);
127 if (rc)
128 return rc;
129
130 if (ctx->state_record_dma_addr == 0) {
131 rc = crypto4xx_alloc_state_record(ctx);
132 if (rc) {
133 crypto4xx_free_sa(ctx);
134 return rc;
135 }
136 }
137
138 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
139 ctx->hash_final = 0;
140
141 set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, SA_NOT_SAVE_IV,
142 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
143 SA_NO_HEADER_PROC, SA_HASH_ALG_NULL,
144 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
145 SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT,
146 DIR_INBOUND);
147
148 set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH,
149 fb, SA_EXTENDED_SN_OFF,
150 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
151 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
152 SA_NOT_COPY_HDR);
153 crypto4xx_memcpy_le(ctx->sa_in + get_dynamic_sa_offset_key_field(ctx),
154 key, keylen);
155 sa->sa_contents = SA_AES_CONTENTS | (keylen << 2);
156 sa->sa_command_1.bf.key_len = keylen >> 3;
157 ctx->is_hash = 0;
158 ctx->direction = DIR_INBOUND;
159 memcpy(ctx->sa_in + get_dynamic_sa_offset_state_ptr_field(ctx),
160 (void *)&ctx->state_record_dma_addr, 4);
161 ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx);
162
163 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
164 sa = (struct dynamic_sa_ctl *) ctx->sa_out;
165 sa->sa_command_0.bf.dir = DIR_OUTBOUND;
166
167 return 0;
168}
169
170int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher,
171 const u8 *key, unsigned int keylen)
172{
173 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC,
174 CRYPTO_FEEDBACK_MODE_NO_FB);
175}
176
177
178
179
180static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm,
181 unsigned int sa_len,
182 unsigned char ha,
183 unsigned char hm)
184{
185 struct crypto_alg *alg = tfm->__crt_alg;
186 struct crypto4xx_alg *my_alg = crypto_alg_to_crypto4xx_alg(alg);
187 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
188 struct dynamic_sa_ctl *sa;
189 struct dynamic_sa_hash160 *sa_in;
190 int rc;
191
192 ctx->dev = my_alg->dev;
193 ctx->is_hash = 1;
194 ctx->hash_final = 0;
195
196
197 if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr)
198 crypto4xx_free_sa(ctx);
199
200 rc = crypto4xx_alloc_sa(ctx, sa_len);
201 if (rc)
202 return rc;
203
204 if (ctx->state_record_dma_addr == 0) {
205 crypto4xx_alloc_state_record(ctx);
206 if (!ctx->state_record_dma_addr) {
207 crypto4xx_free_sa(ctx);
208 return -ENOMEM;
209 }
210 }
211
212 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
213 sizeof(struct crypto4xx_ctx));
214 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
215 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
216 SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
217 SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL,
218 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
219 SA_OPCODE_HASH, DIR_INBOUND);
220 set_dynamic_sa_command_1(sa, 0, SA_HASH_MODE_HASH,
221 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
222 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
223 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
224 SA_NOT_COPY_HDR);
225 ctx->direction = DIR_INBOUND;
226 sa->sa_contents = SA_HASH160_CONTENTS;
227 sa_in = (struct dynamic_sa_hash160 *) ctx->sa_in;
228
229 memset(sa_in->inner_digest, 0, sizeof(sa_in->inner_digest));
230 memset(sa_in->outer_digest, 0, sizeof(sa_in->outer_digest));
231 sa_in->state_ptr = ctx->state_record_dma_addr;
232 ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx);
233
234 return 0;
235}
236
237int crypto4xx_hash_init(struct ahash_request *req)
238{
239 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
240 int ds;
241 struct dynamic_sa_ctl *sa;
242
243 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
244 ds = crypto_ahash_digestsize(
245 __crypto_ahash_cast(req->base.tfm));
246 sa->sa_command_0.bf.digest_len = ds >> 2;
247 sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA;
248 ctx->is_hash = 1;
249 ctx->direction = DIR_INBOUND;
250
251 return 0;
252}
253
254int crypto4xx_hash_update(struct ahash_request *req)
255{
256 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
257
258 ctx->is_hash = 1;
259 ctx->hash_final = 0;
260 ctx->pd_ctl = 0x11;
261 ctx->direction = DIR_INBOUND;
262
263 return crypto4xx_build_pd(&req->base, ctx, req->src,
264 (struct scatterlist *) req->result,
265 req->nbytes, NULL, 0);
266}
267
268int crypto4xx_hash_final(struct ahash_request *req)
269{
270 return 0;
271}
272
273int crypto4xx_hash_digest(struct ahash_request *req)
274{
275 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
276
277 ctx->hash_final = 1;
278 ctx->pd_ctl = 0x11;
279 ctx->direction = DIR_INBOUND;
280
281 return crypto4xx_build_pd(&req->base, ctx, req->src,
282 (struct scatterlist *) req->result,
283 req->nbytes, NULL, 0);
284}
285
286
287
288
289int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm)
290{
291 return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1,
292 SA_HASH_MODE_HASH);
293}
294
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296
