1/* Written by Ben Laurie, 2001 */
2/*
3 * Copyright (c) 2001 The OpenSSL Project.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in
14 *    the documentation and/or other materials provided with the
15 *    distribution.
16 *
17 * 3. All advertising materials mentioning features or use of this
18 *    software must display the following acknowledgment:
19 *    "This product includes software developed by the OpenSSL Project
20 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21 *
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 *    endorse or promote products derived from this software without
24 *    prior written permission. For written permission, please contact
25 *    openssl-core@openssl.org.
26 *
27 * 5. Products derived from this software may not be called "OpenSSL"
28 *    nor may "OpenSSL" appear in their names without prior written
29 *    permission of the OpenSSL Project.
30 *
31 * 6. Redistributions of any form whatsoever must retain the following
32 *    acknowledgment:
33 *    "This product includes software developed by the OpenSSL Project
34 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 */
49
50#include <openssl/evp.h>
51#include <openssl/objects.h>
52#include <openssl/rsa.h>
53#include "evp_locl.h"
54
55/* This stuff should now all be supported through
56 * crypto/engine/hw_openbsd_dev_crypto.c unless I botched it up */
57static void *dummy=&dummy;
58
59#if 0
60
61/* check flag after OpenSSL headers to ensure make depend works */
62#ifdef OPENSSL_OPENBSD_DEV_CRYPTO
63
64#include <fcntl.h>
65#include <stdio.h>
66#include <errno.h>
67#include <sys/ioctl.h>
68#include <crypto/cryptodev.h>
69#include <unistd.h>
70#include <assert.h>
71
72/* longest key supported in hardware */
73#define MAX_HW_KEY	24
74#define MAX_HW_IV	8
75
76#define MD5_DIGEST_LENGTH	16
77#define MD5_CBLOCK		64
78
79static int fd;
80static int dev_failed;
81
82typedef struct session_op session_op;
83
84#define CDATA(ctx) EVP_C_DATA(session_op,ctx)
85
86static void err(const char *str)
87    {
88    fprintf(stderr,"%s: errno %d\n",str,errno);
89    }
90
91static int dev_crypto_init(session_op *ses)
92    {
93    if(dev_failed)
94	return 0;
95    if(!fd)
96	{
97	int cryptodev_fd;
98
99        if ((cryptodev_fd=open("/dev/crypto",O_RDWR,0)) < 0)
100	    {
101	    err("/dev/crypto");
102	    dev_failed=1;
103	    return 0;
104	    }
105        if (ioctl(cryptodev_fd,CRIOGET,&fd) == -1)
106	    {
107	    err("CRIOGET failed");
108	    close(cryptodev_fd);
109	    dev_failed=1;
110	    return 0;
111	    }
112	close(cryptodev_fd);
113	}
114    assert(ses);
115    memset(ses,'\0',sizeof *ses);
116
117    return 1;
118    }
119
120static int dev_crypto_cleanup(EVP_CIPHER_CTX *ctx)
121    {
122    if(ioctl(fd,CIOCFSESSION,&CDATA(ctx)->ses) == -1)
123	err("CIOCFSESSION failed");
124
125    OPENSSL_free(CDATA(ctx)->key);
126
127    return 1;
128    }
129
130static int dev_crypto_init_key(EVP_CIPHER_CTX *ctx,int cipher,
131			       const unsigned char *key,int klen)
132    {
133    if(!dev_crypto_init(CDATA(ctx)))
134	return 0;
135
136    CDATA(ctx)->key=OPENSSL_malloc(MAX_HW_KEY);
137
138    assert(ctx->cipher->iv_len <= MAX_HW_IV);
139
140    memcpy(CDATA(ctx)->key,key,klen);
141
142    CDATA(ctx)->cipher=cipher;
143    CDATA(ctx)->keylen=klen;
144
145    if (ioctl(fd,CIOCGSESSION,CDATA(ctx)) == -1)
146	{
147	err("CIOCGSESSION failed");
148	return 0;
149	}
150    return 1;
151    }
152
153static int dev_crypto_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
154			     const unsigned char *in,unsigned int inl)
155    {
156    struct crypt_op cryp;
157    unsigned char lb[MAX_HW_IV];
158
159    if(!inl)
160	return 1;
161
162    assert(CDATA(ctx));
163    assert(!dev_failed);
164
165    memset(&cryp,'\0',sizeof cryp);
166    cryp.ses=CDATA(ctx)->ses;
167    cryp.op=ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT;
168    cryp.flags=0;
169    cryp.len=inl;
170    assert((inl&(ctx->cipher->block_size-1)) == 0);
171    cryp.src=(caddr_t)in;
172    cryp.dst=(caddr_t)out;
173    cryp.mac=0;
174    if(ctx->cipher->iv_len)
175	cryp.iv=(caddr_t)ctx->iv;
176
177    if(!ctx->encrypt)
178	memcpy(lb,&in[cryp.len-ctx->cipher->iv_len],ctx->cipher->iv_len);
179
180    if(ioctl(fd, CIOCCRYPT, &cryp) == -1)
181	{
182	if(errno == EINVAL) /* buffers are misaligned */
183	    {
184	    unsigned int cinl=0;
185	    char *cin=NULL;
186	    char *cout=NULL;
187
188	    /* NB: this can only make cinl != inl with stream ciphers */
189	    cinl=(inl+3)/4*4;
190
191	    if(((unsigned long)in&3) || cinl != inl)
192		{
193		cin=OPENSSL_malloc(cinl);
194		memcpy(cin,in,inl);
195		cryp.src=cin;
196		}
197
198	    if(((unsigned long)out&3) || cinl != inl)
199		{
200		cout=OPENSSL_malloc(cinl);
201		cryp.dst=cout;
202		}
203
204	    cryp.len=cinl;
205
206	    if(ioctl(fd, CIOCCRYPT, &cryp) == -1)
207		{
208		err("CIOCCRYPT(2) failed");
209		printf("src=%p dst=%p\n",cryp.src,cryp.dst);
210		abort();
211		return 0;
212		}
213
214	    if(cout)
215		{
216		memcpy(out,cout,inl);
217		OPENSSL_free(cout);
218		}
219	    if(cin)
220		OPENSSL_free(cin);
221	    }
222	else
223	    {
224	    err("CIOCCRYPT failed");
225	    abort();
226	    return 0;
227	    }
228	}
229
230    if(ctx->encrypt)
231	memcpy(ctx->iv,&out[cryp.len-ctx->cipher->iv_len],ctx->cipher->iv_len);
232    else
233	memcpy(ctx->iv,lb,ctx->cipher->iv_len);
234
235    return 1;
236    }
237
238static int dev_crypto_des_ede3_init_key(EVP_CIPHER_CTX *ctx,
239					const unsigned char *key,
240					const unsigned char *iv, int enc)
241    { return dev_crypto_init_key(ctx,CRYPTO_3DES_CBC,key,24); }
242
243#define dev_crypto_des_ede3_cbc_cipher dev_crypto_cipher
244
245BLOCK_CIPHER_def_cbc(dev_crypto_des_ede3, session_op, NID_des_ede3, 8, 24, 8,
246		     0, dev_crypto_des_ede3_init_key,
247		     dev_crypto_cleanup,
248		     EVP_CIPHER_set_asn1_iv,
249		     EVP_CIPHER_get_asn1_iv,
250		     NULL)
251
252static int dev_crypto_rc4_init_key(EVP_CIPHER_CTX *ctx,
253					const unsigned char *key,
254					const unsigned char *iv, int enc)
255    { return dev_crypto_init_key(ctx,CRYPTO_ARC4,key,16); }
256
257static const EVP_CIPHER r4_cipher=
258    {
259    NID_rc4,
260    1,16,0,	/* FIXME: key should be up to 256 bytes */
261    EVP_CIPH_VARIABLE_LENGTH,
262    dev_crypto_rc4_init_key,
263    dev_crypto_cipher,
264    dev_crypto_cleanup,
265    sizeof(session_op),
266    NULL,
267    NULL,
268    NULL
269    };
270
271const EVP_CIPHER *EVP_dev_crypto_rc4(void)
272    { return &r4_cipher; }
273
274typedef struct
275    {
276    session_op sess;
277    char *data;
278    int len;
279    unsigned char md[EVP_MAX_MD_SIZE];
280    } MD_DATA;
281
282static int dev_crypto_init_digest(MD_DATA *md_data,int mac)
283    {
284    if(!dev_crypto_init(&md_data->sess))
285	return 0;
286
287    md_data->len=0;
288    md_data->data=NULL;
289
290    md_data->sess.mac=mac;
291
292    if (ioctl(fd,CIOCGSESSION,&md_data->sess) == -1)
293	{
294	err("CIOCGSESSION failed");
295	return 0;
296	}
297    return 1;
298    }
299
300static int dev_crypto_cleanup_digest(MD_DATA *md_data)
301    {
302    if (ioctl(fd,CIOCFSESSION,&md_data->sess.ses) == -1)
303	{
304	err("CIOCFSESSION failed");
305	return 0;
306	}
307
308    return 1;
309    }
310
311/* FIXME: if device can do chained MACs, then don't accumulate */
312/* FIXME: move accumulation to the framework */
313static int dev_crypto_md5_init(EVP_MD_CTX *ctx)
314    { return dev_crypto_init_digest(ctx->md_data,CRYPTO_MD5); }
315
316static int do_digest(int ses,unsigned char *md,const void *data,int len)
317    {
318    struct crypt_op cryp;
319    static unsigned char md5zero[16]=
320	{
321	0xd4,0x1d,0x8c,0xd9,0x8f,0x00,0xb2,0x04,
322	0xe9,0x80,0x09,0x98,0xec,0xf8,0x42,0x7e
323	};
324
325    /* some cards can't do zero length */
326    if(!len)
327	{
328	memcpy(md,md5zero,16);
329	return 1;
330	}
331
332    memset(&cryp,'\0',sizeof cryp);
333    cryp.ses=ses;
334    cryp.op=COP_ENCRYPT;/* required to do the MAC rather than check it */
335    cryp.len=len;
336    cryp.src=(caddr_t)data;
337    cryp.dst=(caddr_t)data; // FIXME!!!
338    cryp.mac=(caddr_t)md;
339
340    if(ioctl(fd, CIOCCRYPT, &cryp) == -1)
341	{
342	if(errno == EINVAL) /* buffer is misaligned */
343	    {
344	    char *dcopy;
345
346	    dcopy=OPENSSL_malloc(len);
347	    memcpy(dcopy,data,len);
348	    cryp.src=dcopy;
349	    cryp.dst=cryp.src; // FIXME!!!
350
351	    if(ioctl(fd, CIOCCRYPT, &cryp) == -1)
352		{
353		err("CIOCCRYPT(MAC2) failed");
354		abort();
355		return 0;
356		}
357	    OPENSSL_free(dcopy);
358	    }
359	else
360	    {
361	    err("CIOCCRYPT(MAC) failed");
362	    abort();
363	    return 0;
364	    }
365	}
366    //    printf("done\n");
367
368    return 1;
369    }
370
371static int dev_crypto_md5_update(EVP_MD_CTX *ctx,const void *data,
372				 unsigned long len)
373    {
374    MD_DATA *md_data=ctx->md_data;
375
376    if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT)
377	return do_digest(md_data->sess.ses,md_data->md,data,len);
378
379    md_data->data=OPENSSL_realloc(md_data->data,md_data->len+len);
380    memcpy(md_data->data+md_data->len,data,len);
381    md_data->len+=len;
382
383    return 1;
384    }
385
386static int dev_crypto_md5_final(EVP_MD_CTX *ctx,unsigned char *md)
387    {
388    int ret;
389    MD_DATA *md_data=ctx->md_data;
390
391    if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT)
392	{
393	memcpy(md,md_data->md,MD5_DIGEST_LENGTH);
394	ret=1;
395	}
396    else
397	{
398	ret=do_digest(md_data->sess.ses,md,md_data->data,md_data->len);
399	OPENSSL_free(md_data->data);
400	md_data->data=NULL;
401	md_data->len=0;
402	}
403
404    return ret;
405    }
406
407static int dev_crypto_md5_copy(EVP_MD_CTX *to,const EVP_MD_CTX *from)
408    {
409    const MD_DATA *from_md=from->md_data;
410    MD_DATA *to_md=to->md_data;
411
412    // How do we copy sessions?
413    assert(from->digest->flags&EVP_MD_FLAG_ONESHOT);
414
415    to_md->data=OPENSSL_malloc(from_md->len);
416    memcpy(to_md->data,from_md->data,from_md->len);
417
418    return 1;
419    }
420
421static int dev_crypto_md5_cleanup(EVP_MD_CTX *ctx)
422    {
423    return dev_crypto_cleanup_digest(ctx->md_data);
424    }
425
426static const EVP_MD md5_md=
427    {
428    NID_md5,
429    NID_md5WithRSAEncryption,
430    MD5_DIGEST_LENGTH,
431    EVP_MD_FLAG_ONESHOT,	// XXX: set according to device info...
432    dev_crypto_md5_init,
433    dev_crypto_md5_update,
434    dev_crypto_md5_final,
435    dev_crypto_md5_copy,
436    dev_crypto_md5_cleanup,
437    EVP_PKEY_RSA_method,
438    MD5_CBLOCK,
439    sizeof(MD_DATA),
440    };
441
442const EVP_MD *EVP_dev_crypto_md5(void)
443    { return &md5_md; }
444
445#endif
446#endif
447