2 * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/malloc.h>
35 #include <sys/libkern.h>
36 #include <sys/endian.h>
38 #if defined(__amd64__) || (defined(__i386__) && !defined(PC98))
39 #include <machine/cpufunc.h>
40 #include <machine/cputypes.h>
41 #include <machine/md_var.h>
42 #include <machine/specialreg.h>
44 #include <machine/pcb.h>
46 #include <opencrypto/cryptodev.h>
47 #include <opencrypto/cryptosoft.h> /* for hmac_ipad_buffer and hmac_opad_buffer */
48 #include <opencrypto/xform.h>
50 #include <crypto/via/padlock.h>
53 * Implementation notes.
55 * Some VIA CPUs provides SHA1 and SHA256 acceleration.
56 * We implement all HMAC algorithms provided by crypto(9) framework, but we do
57 * the crypto work in software unless this is HMAC/SHA1 or HMAC/SHA256 and
58 * our CPU can accelerate it.
60 * Additional CPU instructions, which preform SHA1 and SHA256 are one-shot
61 * functions - we have only one chance to give the data, CPU itself will add
62 * the padding and calculate hash automatically.
63 * This means, it is not possible to implement common init(), update(), final()
65 * The way I've choosen is to keep adding data to the buffer on update()
66 * (reallocating the buffer if necessary) and call XSHA{1,256} instruction on
70 struct padlock_sha_ctx {
75 CTASSERT(sizeof(struct padlock_sha_ctx) <= sizeof(union authctx));
77 static void padlock_sha_init(struct padlock_sha_ctx *ctx);
78 static int padlock_sha_update(struct padlock_sha_ctx *ctx, uint8_t *buf,
80 static void padlock_sha1_final(uint8_t *hash, struct padlock_sha_ctx *ctx);
81 static void padlock_sha256_final(uint8_t *hash, struct padlock_sha_ctx *ctx);
83 static struct auth_hash padlock_hmac_sha1 = {
84 CRYPTO_SHA1_HMAC, "HMAC-SHA1",
85 20, SHA1_HASH_LEN, SHA1_HMAC_BLOCK_LEN, sizeof(struct padlock_sha_ctx),
86 (void (*)(void *))padlock_sha_init,
87 (int (*)(void *, uint8_t *, uint16_t))padlock_sha_update,
88 (void (*)(uint8_t *, void *))padlock_sha1_final
91 static struct auth_hash padlock_hmac_sha256 = {
92 CRYPTO_SHA2_256_HMAC, "HMAC-SHA2-256",
93 32, SHA2_256_HASH_LEN, SHA2_256_HMAC_BLOCK_LEN, sizeof(struct padlock_sha_ctx),
94 (void (*)(void *))padlock_sha_init,
95 (int (*)(void *, uint8_t *, uint16_t))padlock_sha_update,
96 (void (*)(uint8_t *, void *))padlock_sha256_final
99 MALLOC_DECLARE(M_PADLOCK);
102 padlock_output_block(uint32_t *src, uint32_t *dst, size_t count)
106 *dst++ = bswap32(*src++);
110 padlock_do_sha1(const u_char *in, u_char *out, int count)
112 u_char buf[128+16]; /* PadLock needs at least 128 bytes buffer. */
113 u_char *result = PADLOCK_ALIGN(buf);
115 ((uint32_t *)result)[0] = 0x67452301;
116 ((uint32_t *)result)[1] = 0xEFCDAB89;
117 ((uint32_t *)result)[2] = 0x98BADCFE;
118 ((uint32_t *)result)[3] = 0x10325476;
119 ((uint32_t *)result)[4] = 0xC3D2E1F0;
121 #ifdef __GNUCLIKE_ASM
123 ".byte 0xf3, 0x0f, 0xa6, 0xc8" /* rep xsha1 */
124 : "+S"(in), "+D"(result)
129 padlock_output_block((uint32_t *)result, (uint32_t *)out,
130 SHA1_HASH_LEN / sizeof(uint32_t));
134 padlock_do_sha256(const char *in, char *out, int count)
136 char buf[128+16]; /* PadLock needs at least 128 bytes buffer. */
137 char *result = PADLOCK_ALIGN(buf);
139 ((uint32_t *)result)[0] = 0x6A09E667;
140 ((uint32_t *)result)[1] = 0xBB67AE85;
141 ((uint32_t *)result)[2] = 0x3C6EF372;
142 ((uint32_t *)result)[3] = 0xA54FF53A;
143 ((uint32_t *)result)[4] = 0x510E527F;
144 ((uint32_t *)result)[5] = 0x9B05688C;
145 ((uint32_t *)result)[6] = 0x1F83D9AB;
146 ((uint32_t *)result)[7] = 0x5BE0CD19;
148 #ifdef __GNUCLIKE_ASM
150 ".byte 0xf3, 0x0f, 0xa6, 0xd0" /* rep xsha256 */
151 : "+S"(in), "+D"(result)
156 padlock_output_block((uint32_t *)result, (uint32_t *)out,
157 SHA2_256_HASH_LEN / sizeof(uint32_t));
161 padlock_sha_init(struct padlock_sha_ctx *ctx)
170 padlock_sha_update(struct padlock_sha_ctx *ctx, uint8_t *buf, uint16_t bufsize)
173 if (ctx->psc_size - ctx->psc_offset < bufsize) {
174 ctx->psc_size = MAX(ctx->psc_size * 2, ctx->psc_size + bufsize);
175 ctx->psc_buf = realloc(ctx->psc_buf, ctx->psc_size, M_PADLOCK,
177 if(ctx->psc_buf == NULL)
180 bcopy(buf, ctx->psc_buf + ctx->psc_offset, bufsize);
181 ctx->psc_offset += bufsize;
186 padlock_sha_free(struct padlock_sha_ctx *ctx)
189 if (ctx->psc_buf != NULL) {
190 //bzero(ctx->psc_buf, ctx->psc_size);
191 free(ctx->psc_buf, M_PADLOCK);
199 padlock_sha1_final(uint8_t *hash, struct padlock_sha_ctx *ctx)
202 padlock_do_sha1(ctx->psc_buf, hash, ctx->psc_offset);
203 padlock_sha_free(ctx);
207 padlock_sha256_final(uint8_t *hash, struct padlock_sha_ctx *ctx)
210 padlock_do_sha256(ctx->psc_buf, hash, ctx->psc_offset);
211 padlock_sha_free(ctx);
215 padlock_copy_ctx(struct auth_hash *axf, void *sctx, void *dctx)
218 if ((via_feature_xcrypt & VIA_HAS_SHA) != 0 &&
219 (axf->type == CRYPTO_SHA1_HMAC ||
220 axf->type == CRYPTO_SHA2_256_HMAC)) {
221 struct padlock_sha_ctx *spctx = sctx, *dpctx = dctx;
223 dpctx->psc_offset = spctx->psc_offset;
224 dpctx->psc_size = spctx->psc_size;
225 dpctx->psc_buf = malloc(dpctx->psc_size, M_PADLOCK, M_WAITOK);
226 bcopy(spctx->psc_buf, dpctx->psc_buf, dpctx->psc_size);
228 bcopy(sctx, dctx, axf->ctxsize);
233 padlock_free_ctx(struct auth_hash *axf, void *ctx)
236 if ((via_feature_xcrypt & VIA_HAS_SHA) != 0 &&
237 (axf->type == CRYPTO_SHA1_HMAC ||
238 axf->type == CRYPTO_SHA2_256_HMAC)) {
239 padlock_sha_free(ctx);
244 padlock_hash_key_setup(struct padlock_session *ses, caddr_t key, int klen)
246 struct auth_hash *axf;
253 * Try to free contexts before using them, because
254 * padlock_hash_key_setup() can be called twice - once from
255 * padlock_newsession() and again from padlock_process().
257 padlock_free_ctx(axf, ses->ses_ictx);
258 padlock_free_ctx(axf, ses->ses_octx);
260 for (i = 0; i < klen; i++)
261 key[i] ^= HMAC_IPAD_VAL;
263 axf->Init(ses->ses_ictx);
264 axf->Update(ses->ses_ictx, key, klen);
265 axf->Update(ses->ses_ictx, hmac_ipad_buffer, axf->blocksize - klen);
267 for (i = 0; i < klen; i++)
268 key[i] ^= (HMAC_IPAD_VAL ^ HMAC_OPAD_VAL);
270 axf->Init(ses->ses_octx);
271 axf->Update(ses->ses_octx, key, klen);
272 axf->Update(ses->ses_octx, hmac_opad_buffer, axf->blocksize - klen);
274 for (i = 0; i < klen; i++)
275 key[i] ^= HMAC_OPAD_VAL;
279 * Compute keyed-hash authenticator.
282 padlock_authcompute(struct padlock_session *ses, struct cryptodesc *crd,
283 caddr_t buf, int flags)
285 u_char hash[HASH_MAX_LEN];
286 struct auth_hash *axf;
292 padlock_copy_ctx(axf, ses->ses_ictx, &ctx);
293 error = crypto_apply(flags, buf, crd->crd_skip, crd->crd_len,
294 (int (*)(void *, void *, unsigned int))axf->Update, (caddr_t)&ctx);
296 padlock_free_ctx(axf, &ctx);
299 axf->Final(hash, &ctx);
301 padlock_copy_ctx(axf, ses->ses_octx, &ctx);
302 axf->Update(&ctx, hash, axf->hashsize);
303 axf->Final(hash, &ctx);
305 /* Inject the authentication data */
306 crypto_copyback(flags, buf, crd->crd_inject,
307 ses->ses_mlen == 0 ? axf->hashsize : ses->ses_mlen, hash);
312 padlock_hash_setup(struct padlock_session *ses, struct cryptoini *macini)
315 ses->ses_mlen = macini->cri_mlen;
317 /* Find software structure which describes HMAC algorithm. */
318 switch (macini->cri_alg) {
319 case CRYPTO_NULL_HMAC:
320 ses->ses_axf = &auth_hash_null;
322 case CRYPTO_MD5_HMAC:
323 ses->ses_axf = &auth_hash_hmac_md5;
325 case CRYPTO_SHA1_HMAC:
326 if ((via_feature_xcrypt & VIA_HAS_SHA) != 0)
327 ses->ses_axf = &padlock_hmac_sha1;
329 ses->ses_axf = &auth_hash_hmac_sha1;
331 case CRYPTO_RIPEMD160_HMAC:
332 ses->ses_axf = &auth_hash_hmac_ripemd_160;
334 case CRYPTO_SHA2_256_HMAC:
335 if ((via_feature_xcrypt & VIA_HAS_SHA) != 0)
336 ses->ses_axf = &padlock_hmac_sha256;
338 ses->ses_axf = &auth_hash_hmac_sha2_256;
340 case CRYPTO_SHA2_384_HMAC:
341 ses->ses_axf = &auth_hash_hmac_sha2_384;
343 case CRYPTO_SHA2_512_HMAC:
344 ses->ses_axf = &auth_hash_hmac_sha2_512;
348 /* Allocate memory for HMAC inner and outer contexts. */
349 ses->ses_ictx = malloc(ses->ses_axf->ctxsize, M_PADLOCK,
351 ses->ses_octx = malloc(ses->ses_axf->ctxsize, M_PADLOCK,
353 if (ses->ses_ictx == NULL || ses->ses_octx == NULL)
356 /* Setup key if given. */
357 if (macini->cri_key != NULL) {
358 padlock_hash_key_setup(ses, macini->cri_key,
365 padlock_hash_process(struct padlock_session *ses, struct cryptodesc *maccrd,
372 error = fpu_kern_enter(td, ses->ses_fpu_ctx, FPU_KERN_NORMAL |
376 if ((maccrd->crd_flags & CRD_F_KEY_EXPLICIT) != 0)
377 padlock_hash_key_setup(ses, maccrd->crd_key, maccrd->crd_klen);
379 error = padlock_authcompute(ses, maccrd, crp->crp_buf, crp->crp_flags);
380 fpu_kern_leave(td, ses->ses_fpu_ctx);
385 padlock_hash_free(struct padlock_session *ses)
388 if (ses->ses_ictx != NULL) {
389 padlock_free_ctx(ses->ses_axf, ses->ses_ictx);
390 bzero(ses->ses_ictx, ses->ses_axf->ctxsize);
391 free(ses->ses_ictx, M_PADLOCK);
392 ses->ses_ictx = NULL;
394 if (ses->ses_octx != NULL) {
395 padlock_free_ctx(ses->ses_axf, ses->ses_octx);
396 bzero(ses->ses_octx, ses->ses_axf->ctxsize);
397 free(ses->ses_octx, M_PADLOCK);
398 ses->ses_octx = NULL;