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-rw-r--r--drivers/crypto/nx/nx-sha512.c265
1 files changed, 265 insertions, 0 deletions
diff --git a/drivers/crypto/nx/nx-sha512.c b/drivers/crypto/nx/nx-sha512.c
new file mode 100644
index 000000000000..3177b8c3d5f1
--- /dev/null
+++ b/drivers/crypto/nx/nx-sha512.c
@@ -0,0 +1,265 @@
1/**
2 * SHA-512 routines supporting the Power 7+ Nest Accelerators driver
3 *
4 * Copyright (C) 2011-2012 International Business Machines Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 only.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 *
19 * Author: Kent Yoder <yoder1@us.ibm.com>
20 */
21
22#include <crypto/internal/hash.h>
23#include <crypto/sha.h>
24#include <linux/module.h>
25#include <asm/vio.h>
26
27#include "nx_csbcpb.h"
28#include "nx.h"
29
30
31static int nx_sha512_init(struct shash_desc *desc)
32{
33 struct sha512_state *sctx = shash_desc_ctx(desc);
34 struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
35 struct nx_sg *out_sg;
36
37 nx_ctx_init(nx_ctx, HCOP_FC_SHA);
38
39 memset(sctx, 0, sizeof *sctx);
40
41 nx_ctx->ap = &nx_ctx->props[NX_PROPS_SHA512];
42
43 NX_CPB_SET_DIGEST_SIZE(nx_ctx->csbcpb, NX_DS_SHA512);
44 out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *)sctx->state,
45 SHA512_DIGEST_SIZE, nx_ctx->ap->sglen);
46 nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
47
48 return 0;
49}
50
51static int nx_sha512_update(struct shash_desc *desc, const u8 *data,
52 unsigned int len)
53{
54 struct sha512_state *sctx = shash_desc_ctx(desc);
55 struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
56 struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
57 struct nx_sg *in_sg;
58 u64 to_process, leftover, spbc_bits;
59 int rc = 0;
60
61 if (NX_CPB_FDM(csbcpb) & NX_FDM_CONTINUATION) {
62 /* we've hit the nx chip previously and we're updating again,
63 * so copy over the partial digest */
64 memcpy(csbcpb->cpb.sha512.input_partial_digest,
65 csbcpb->cpb.sha512.message_digest, SHA512_DIGEST_SIZE);
66 }
67
68 /* 2 cases for total data len:
69 * 1: <= SHA512_BLOCK_SIZE: copy into state, return 0
70 * 2: > SHA512_BLOCK_SIZE: process X blocks, copy in leftover
71 */
72 if ((u64)len + sctx->count[0] <= SHA512_BLOCK_SIZE) {
73 memcpy(sctx->buf + sctx->count[0], data, len);
74 sctx->count[0] += len;
75 goto out;
76 }
77
78 /* to_process: the SHA512_BLOCK_SIZE data chunk to process in this
79 * update */
80 to_process = (sctx->count[0] + len) & ~(SHA512_BLOCK_SIZE - 1);
81 leftover = (sctx->count[0] + len) & (SHA512_BLOCK_SIZE - 1);
82
83 if (sctx->count[0]) {
84 in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *)sctx->buf,
85 sctx->count[0], nx_ctx->ap->sglen);
86 in_sg = nx_build_sg_list(in_sg, (u8 *)data,
87 to_process - sctx->count[0],
88 nx_ctx->ap->sglen);
89 nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) *
90 sizeof(struct nx_sg);
91 } else {
92 in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *)data,
93 to_process, nx_ctx->ap->sglen);
94 nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) *
95 sizeof(struct nx_sg);
96 }
97
98 NX_CPB_FDM(csbcpb) |= NX_FDM_INTERMEDIATE;
99
100 if (!nx_ctx->op.inlen || !nx_ctx->op.outlen) {
101 rc = -EINVAL;
102 goto out;
103 }
104
105 rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
106 desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP);
107 if (rc)
108 goto out;
109
110 atomic_inc(&(nx_ctx->stats->sha512_ops));
111
112 /* copy the leftover back into the state struct */
113 memcpy(sctx->buf, data + len - leftover, leftover);
114 sctx->count[0] = leftover;
115
116 spbc_bits = csbcpb->cpb.sha512.spbc * 8;
117 csbcpb->cpb.sha512.message_bit_length_lo += spbc_bits;
118 if (csbcpb->cpb.sha512.message_bit_length_lo < spbc_bits)
119 csbcpb->cpb.sha512.message_bit_length_hi++;
120
121 /* everything after the first update is continuation */
122 NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
123out:
124 return rc;
125}
126
127static int nx_sha512_final(struct shash_desc *desc, u8 *out)
128{
129 struct sha512_state *sctx = shash_desc_ctx(desc);
130 struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
131 struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
132 struct nx_sg *in_sg, *out_sg;
133 u64 count0;
134 int rc;
135
136 if (NX_CPB_FDM(csbcpb) & NX_FDM_CONTINUATION) {
137 /* we've hit the nx chip previously, now we're finalizing,
138 * so copy over the partial digest */
139 memcpy(csbcpb->cpb.sha512.input_partial_digest,
140 csbcpb->cpb.sha512.message_digest, SHA512_DIGEST_SIZE);
141 }
142
143 /* final is represented by continuing the operation and indicating that
144 * this is not an intermediate operation */
145 NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE;
146
147 count0 = sctx->count[0] * 8;
148
149 csbcpb->cpb.sha512.message_bit_length_lo += count0;
150 if (csbcpb->cpb.sha512.message_bit_length_lo < count0)
151 csbcpb->cpb.sha512.message_bit_length_hi++;
152
153 in_sg = nx_build_sg_list(nx_ctx->in_sg, sctx->buf, sctx->count[0],
154 nx_ctx->ap->sglen);
155 out_sg = nx_build_sg_list(nx_ctx->out_sg, out, SHA512_DIGEST_SIZE,
156 nx_ctx->ap->sglen);
157 nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg);
158 nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
159
160 if (!nx_ctx->op.outlen) {
161 rc = -EINVAL;
162 goto out;
163 }
164
165 rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
166 desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP);
167 if (rc)
168 goto out;
169
170 atomic_inc(&(nx_ctx->stats->sha512_ops));
171 atomic64_add(csbcpb->cpb.sha512.message_bit_length_lo,
172 &(nx_ctx->stats->sha512_bytes));
173
174 memcpy(out, csbcpb->cpb.sha512.message_digest, SHA512_DIGEST_SIZE);
175out:
176 return rc;
177}
178
179static int nx_sha512_export(struct shash_desc *desc, void *out)
180{
181 struct sha512_state *sctx = shash_desc_ctx(desc);
182 struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
183 struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
184 struct sha512_state *octx = out;
185
186 /* move message_bit_length (128 bits) into count and convert its value
187 * to bytes */
188 octx->count[0] = csbcpb->cpb.sha512.message_bit_length_lo >> 3 |
189 ((csbcpb->cpb.sha512.message_bit_length_hi & 7) << 61);
190 octx->count[1] = csbcpb->cpb.sha512.message_bit_length_hi >> 3;
191
192 octx->count[0] += sctx->count[0];
193 if (octx->count[0] < sctx->count[0])
194 octx->count[1]++;
195
196 memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
197
198 /* if no data has been processed yet, we need to export SHA512's
199 * initial data, in case this context gets imported into a software
200 * context */
201 if (csbcpb->cpb.sha512.message_bit_length_hi ||
202 csbcpb->cpb.sha512.message_bit_length_lo)
203 memcpy(octx->state, csbcpb->cpb.sha512.message_digest,
204 SHA512_DIGEST_SIZE);
205 else {
206 octx->state[0] = SHA512_H0;
207 octx->state[1] = SHA512_H1;
208 octx->state[2] = SHA512_H2;
209 octx->state[3] = SHA512_H3;
210 octx->state[4] = SHA512_H4;
211 octx->state[5] = SHA512_H5;
212 octx->state[6] = SHA512_H6;
213 octx->state[7] = SHA512_H7;
214 }
215
216 return 0;
217}
218
219static int nx_sha512_import(struct shash_desc *desc, const void *in)
220{
221 struct sha512_state *sctx = shash_desc_ctx(desc);
222 struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
223 struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
224 const struct sha512_state *ictx = in;
225
226 memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
227 sctx->count[0] = ictx->count[0] & 0x3f;
228 csbcpb->cpb.sha512.message_bit_length_lo = (ictx->count[0] & ~0x3f)
229 << 3;
230 csbcpb->cpb.sha512.message_bit_length_hi = ictx->count[1] << 3 |
231 ictx->count[0] >> 61;
232
233 if (csbcpb->cpb.sha512.message_bit_length_hi ||
234 csbcpb->cpb.sha512.message_bit_length_lo) {
235 memcpy(csbcpb->cpb.sha512.message_digest, ictx->state,
236 SHA512_DIGEST_SIZE);
237
238 NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
239 NX_CPB_FDM(csbcpb) |= NX_FDM_INTERMEDIATE;
240 }
241
242 return 0;
243}
244
245struct shash_alg nx_shash_sha512_alg = {
246 .digestsize = SHA512_DIGEST_SIZE,
247 .init = nx_sha512_init,
248 .update = nx_sha512_update,
249 .final = nx_sha512_final,
250 .export = nx_sha512_export,
251 .import = nx_sha512_import,
252 .descsize = sizeof(struct sha512_state),
253 .statesize = sizeof(struct sha512_state),
254 .base = {
255 .cra_name = "sha512",
256 .cra_driver_name = "sha512-nx",
257 .cra_priority = 300,
258 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
259 .cra_blocksize = SHA512_BLOCK_SIZE,
260 .cra_module = THIS_MODULE,
261 .cra_ctxsize = sizeof(struct nx_crypto_ctx),
262 .cra_init = nx_crypto_ctx_sha_init,
263 .cra_exit = nx_crypto_ctx_exit,
264 }
265};
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-10 14:54:37 -0500