1/* evp_locl.h */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2000.
4 */
5/* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in
17 *    the documentation and/or other materials provided with the
18 *    distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 *    software must display the following acknowledgment:
22 *    "This product includes software developed by the OpenSSL Project
23 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 *    endorse or promote products derived from this software without
27 *    prior written permission. For written permission, please contact
28 *    licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 *    nor may "OpenSSL" appear in their names without prior written
32 *    permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 *    acknowledgment:
36 *    "This product includes software developed by the OpenSSL Project
37 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com).  This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59/* Macros to code block cipher wrappers */
60
61/* Wrapper functions for each cipher mode */
62
63#define BLOCK_CIPHER_ecb_loop() \
64	size_t i, bl; \
65	bl = ctx->cipher->block_size;\
66	if(inl < bl) return 1;\
67	inl -= bl; \
68	for(i=0; i <= inl; i+=bl)
69
70#define BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
71static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
72{\
73	BLOCK_CIPHER_ecb_loop() \
74		cprefix##_ecb_encrypt(in + i, out + i, &((kstruct *)ctx->cipher_data)->ksched, ctx->encrypt);\
75	return 1;\
76}
77
78#define EVP_MAXCHUNK ((size_t)1<<(sizeof(long)*8-2))
79
80#define BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched) \
81static int cname##_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
82{\
83	while(inl>=EVP_MAXCHUNK)\
84	    {\
85	    cprefix##_ofb##cbits##_encrypt(in, out, (long)EVP_MAXCHUNK, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, &ctx->num);\
86	    inl-=EVP_MAXCHUNK;\
87	    in +=EVP_MAXCHUNK;\
88	    out+=EVP_MAXCHUNK;\
89	    }\
90	if (inl)\
91	    cprefix##_ofb##cbits##_encrypt(in, out, (long)inl, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, &ctx->num);\
92	return 1;\
93}
94
95#define BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
96static int cname##_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
97{\
98	while(inl>=EVP_MAXCHUNK) \
99	    {\
100	    cprefix##_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, ctx->encrypt);\
101	    inl-=EVP_MAXCHUNK;\
102	    in +=EVP_MAXCHUNK;\
103	    out+=EVP_MAXCHUNK;\
104	    }\
105	if (inl)\
106	    cprefix##_cbc_encrypt(in, out, (long)inl, &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, ctx->encrypt);\
107	return 1;\
108}
109
110#define BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
111static int cname##_cfb##cbits##_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) \
112{\
113	size_t chunk=EVP_MAXCHUNK;\
114	if (cbits==1)  chunk>>=3;\
115	if (inl<chunk) chunk=inl;\
116	while(inl && inl>=chunk)\
117	    {\
118            cprefix##_cfb##cbits##_encrypt(in, out, (long)((cbits==1) && !(ctx->flags & EVP_CIPH_FLAG_LENGTH_BITS) ?inl*8:inl), &((kstruct *)ctx->cipher_data)->ksched, ctx->iv, &ctx->num, ctx->encrypt);\
119	    inl-=chunk;\
120	    in +=chunk;\
121	    out+=chunk;\
122	    if(inl<chunk) chunk=inl;\
123	    }\
124	return 1;\
125}
126
127#define BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
128	BLOCK_CIPHER_func_cbc(cname, cprefix, kstruct, ksched) \
129	BLOCK_CIPHER_func_cfb(cname, cprefix, cbits, kstruct, ksched) \
130	BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
131	BLOCK_CIPHER_func_ofb(cname, cprefix, cbits, kstruct, ksched)
132
133#define BLOCK_CIPHER_def1(cname, nmode, mode, MODE, kstruct, nid, block_size, \
134			  key_len, iv_len, flags, init_key, cleanup, \
135			  set_asn1, get_asn1, ctrl) \
136static const EVP_CIPHER cname##_##mode = { \
137	nid##_##nmode, block_size, key_len, iv_len, \
138	flags | EVP_CIPH_##MODE##_MODE, \
139	init_key, \
140	cname##_##mode##_cipher, \
141	cleanup, \
142	sizeof(kstruct), \
143	set_asn1, get_asn1,\
144	ctrl, \
145	NULL \
146}; \
147const EVP_CIPHER *EVP_##cname##_##mode(void) { return &cname##_##mode; }
148
149#define BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, \
150			     iv_len, flags, init_key, cleanup, set_asn1, \
151			     get_asn1, ctrl) \
152BLOCK_CIPHER_def1(cname, cbc, cbc, CBC, kstruct, nid, block_size, key_len, \
153		  iv_len, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
154
155#define BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, \
156			     iv_len, cbits, flags, init_key, cleanup, \
157			     set_asn1, get_asn1, ctrl) \
158BLOCK_CIPHER_def1(cname, cfb##cbits, cfb##cbits, CFB, kstruct, nid, 1, \
159		  key_len, iv_len, flags, init_key, cleanup, set_asn1, \
160		  get_asn1, ctrl)
161
162#define BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, \
163			     iv_len, cbits, flags, init_key, cleanup, \
164			     set_asn1, get_asn1, ctrl) \
165BLOCK_CIPHER_def1(cname, ofb##cbits, ofb, OFB, kstruct, nid, 1, \
166		  key_len, iv_len, flags, init_key, cleanup, set_asn1, \
167		  get_asn1, ctrl)
168
169#define BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, \
170			     flags, init_key, cleanup, set_asn1, \
171			     get_asn1, ctrl) \
172BLOCK_CIPHER_def1(cname, ecb, ecb, ECB, kstruct, nid, block_size, key_len, \
173		  0, flags, init_key, cleanup, set_asn1, get_asn1, ctrl)
174
175#define BLOCK_CIPHER_defs(cname, kstruct, \
176			  nid, block_size, key_len, iv_len, cbits, flags, \
177			  init_key, cleanup, set_asn1, get_asn1, ctrl) \
178BLOCK_CIPHER_def_cbc(cname, kstruct, nid, block_size, key_len, iv_len, flags, \
179		     init_key, cleanup, set_asn1, get_asn1, ctrl) \
180BLOCK_CIPHER_def_cfb(cname, kstruct, nid, key_len, iv_len, cbits, \
181		     flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
182BLOCK_CIPHER_def_ofb(cname, kstruct, nid, key_len, iv_len, cbits, \
183		     flags, init_key, cleanup, set_asn1, get_asn1, ctrl) \
184BLOCK_CIPHER_def_ecb(cname, kstruct, nid, block_size, key_len, flags, \
185		     init_key, cleanup, set_asn1, get_asn1, ctrl)
186
187
188/*
189#define BLOCK_CIPHER_defs(cname, kstruct, \
190				nid, block_size, key_len, iv_len, flags,\
191				 init_key, cleanup, set_asn1, get_asn1, ctrl)\
192static const EVP_CIPHER cname##_cbc = {\
193	nid##_cbc, block_size, key_len, iv_len, \
194	flags | EVP_CIPH_CBC_MODE,\
195	init_key,\
196	cname##_cbc_cipher,\
197	cleanup,\
198	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
199		sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
200	set_asn1, get_asn1,\
201	ctrl, \
202	NULL \
203};\
204const EVP_CIPHER *EVP_##cname##_cbc(void) { return &cname##_cbc; }\
205static const EVP_CIPHER cname##_cfb = {\
206	nid##_cfb64, 1, key_len, iv_len, \
207	flags | EVP_CIPH_CFB_MODE,\
208	init_key,\
209	cname##_cfb_cipher,\
210	cleanup,\
211	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
212		sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
213	set_asn1, get_asn1,\
214	ctrl,\
215	NULL \
216};\
217const EVP_CIPHER *EVP_##cname##_cfb(void) { return &cname##_cfb; }\
218static const EVP_CIPHER cname##_ofb = {\
219	nid##_ofb64, 1, key_len, iv_len, \
220	flags | EVP_CIPH_OFB_MODE,\
221	init_key,\
222	cname##_ofb_cipher,\
223	cleanup,\
224	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
225		sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
226	set_asn1, get_asn1,\
227	ctrl,\
228	NULL \
229};\
230const EVP_CIPHER *EVP_##cname##_ofb(void) { return &cname##_ofb; }\
231static const EVP_CIPHER cname##_ecb = {\
232	nid##_ecb, block_size, key_len, iv_len, \
233	flags | EVP_CIPH_ECB_MODE,\
234	init_key,\
235	cname##_ecb_cipher,\
236	cleanup,\
237	sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+\
238		sizeof((((EVP_CIPHER_CTX *)NULL)->c.kstruct)),\
239	set_asn1, get_asn1,\
240	ctrl,\
241	NULL \
242};\
243const EVP_CIPHER *EVP_##cname##_ecb(void) { return &cname##_ecb; }
244*/
245
246#define IMPLEMENT_BLOCK_CIPHER(cname, ksched, cprefix, kstruct, nid, \
247			       block_size, key_len, iv_len, cbits, \
248			       flags, init_key, \
249			       cleanup, set_asn1, get_asn1, ctrl) \
250	BLOCK_CIPHER_all_funcs(cname, cprefix, cbits, kstruct, ksched) \
251	BLOCK_CIPHER_defs(cname, kstruct, nid, block_size, key_len, iv_len, \
252			  cbits, flags, init_key, cleanup, set_asn1, \
253			  get_asn1, ctrl)
254
255#define EVP_C_DATA(kstruct, ctx)	((kstruct *)(ctx)->cipher_data)
256
257#define IMPLEMENT_CFBR(cipher,cprefix,kstruct,ksched,keysize,cbits,iv_len) \
258	BLOCK_CIPHER_func_cfb(cipher##_##keysize,cprefix,cbits,kstruct,ksched) \
259	BLOCK_CIPHER_def_cfb(cipher##_##keysize,kstruct, \
260			     NID_##cipher##_##keysize, keysize/8, iv_len, cbits, \
261			     0, cipher##_init_key, NULL, \
262			     EVP_CIPHER_set_asn1_iv, \
263			     EVP_CIPHER_get_asn1_iv, \
264			     NULL)
265
266struct evp_pkey_ctx_st
267	{
268	/* Method associated with this operation */
269	const EVP_PKEY_METHOD *pmeth;
270	/* Engine that implements this method or NULL if builtin */
271	ENGINE *engine;
272	/* Key: may be NULL */
273	EVP_PKEY *pkey;
274	/* Peer key for key agreement, may be NULL */
275	EVP_PKEY *peerkey;
276	/* Actual operation */
277	int operation;
278	/* Algorithm specific data */
279	void *data;
280	/* Application specific data */
281	void *app_data;
282	/* Keygen callback */
283	EVP_PKEY_gen_cb *pkey_gencb;
284	/* implementation specific keygen data */
285	int *keygen_info;
286	int keygen_info_count;
287	} /* EVP_PKEY_CTX */;
288
289#define EVP_PKEY_FLAG_DYNAMIC	1
290
291struct evp_pkey_method_st
292	{
293	int pkey_id;
294	int flags;
295
296	int (*init)(EVP_PKEY_CTX *ctx);
297	int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src);
298	void (*cleanup)(EVP_PKEY_CTX *ctx);
299
300	int (*paramgen_init)(EVP_PKEY_CTX *ctx);
301	int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
302
303	int (*keygen_init)(EVP_PKEY_CTX *ctx);
304	int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
305
306	int (*sign_init)(EVP_PKEY_CTX *ctx);
307	int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
308				const unsigned char *tbs, size_t tbslen);
309
310	int (*verify_init)(EVP_PKEY_CTX *ctx);
311	int (*verify)(EVP_PKEY_CTX *ctx,
312				const unsigned char *sig, size_t siglen,
313				const unsigned char *tbs, size_t tbslen);
314
315	int (*verify_recover_init)(EVP_PKEY_CTX *ctx);
316	int (*verify_recover)(EVP_PKEY_CTX *ctx,
317				unsigned char *rout, size_t *routlen,
318				const unsigned char *sig, size_t siglen);
319
320	int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
321	int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
322					EVP_MD_CTX *mctx);
323
324	int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
325	int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,int siglen,
326					EVP_MD_CTX *mctx);
327
328	int (*encrypt_init)(EVP_PKEY_CTX *ctx);
329	int (*encrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
330					const unsigned char *in, size_t inlen);
331
332	int (*decrypt_init)(EVP_PKEY_CTX *ctx);
333	int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
334					const unsigned char *in, size_t inlen);
335
336	int (*derive_init)(EVP_PKEY_CTX *ctx);
337	int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
338
339	int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
340	int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value);
341
342
343	} /* EVP_PKEY_METHOD */;
344
345void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx);
346