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1 /* crypto/rsa/rsa_ameth.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3  * project 2006.
4  */
5 /* ====================================================================
6  * Copyright (c) 2006 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 #include <stdio.h>
60 #include "cryptlib.h"
61 #include <openssl/asn1t.h>
62 #include <openssl/x509.h>
63 #include <openssl/rsa.h>
64 #include <openssl/bn.h>
65 #ifndef OPENSSL_NO_CMS
66 #include <openssl/cms.h>
67 #endif
68 #include "asn1_locl.h"
69 
rsa_pub_encode(X509_PUBKEY * pk,const EVP_PKEY * pkey)70 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
71 	{
72 	unsigned char *penc = NULL;
73 	int penclen;
74 	penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
75 	if (penclen <= 0)
76 		return 0;
77 	if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA),
78 				V_ASN1_NULL, NULL, penc, penclen))
79 		return 1;
80 
81 	OPENSSL_free(penc);
82 	return 0;
83 	}
84 
rsa_pub_decode(EVP_PKEY * pkey,X509_PUBKEY * pubkey)85 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
86 	{
87 	const unsigned char *p;
88 	int pklen;
89 	RSA *rsa = NULL;
90 	if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
91 		return 0;
92 	if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen)))
93 		{
94 		RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
95 		return 0;
96 		}
97 	EVP_PKEY_assign_RSA (pkey, rsa);
98 	return 1;
99 	}
100 
rsa_pub_cmp(const EVP_PKEY * a,const EVP_PKEY * b)101 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
102 	{
103 	if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0
104 		|| BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0)
105 			return 0;
106 	return 1;
107 	}
108 
old_rsa_priv_decode(EVP_PKEY * pkey,const unsigned char ** pder,int derlen)109 static int old_rsa_priv_decode(EVP_PKEY *pkey,
110 					const unsigned char **pder, int derlen)
111 	{
112 	RSA *rsa;
113 	if (!(rsa = d2i_RSAPrivateKey (NULL, pder, derlen)))
114 		{
115 		RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
116 		return 0;
117 		}
118 	EVP_PKEY_assign_RSA(pkey, rsa);
119 	return 1;
120 	}
121 
old_rsa_priv_encode(const EVP_PKEY * pkey,unsigned char ** pder)122 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
123 	{
124 	return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
125 	}
126 
rsa_priv_encode(PKCS8_PRIV_KEY_INFO * p8,const EVP_PKEY * pkey)127 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
128 	{
129 	unsigned char *rk = NULL;
130 	int rklen;
131 	rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
132 
133 	if (rklen <= 0)
134 		{
135 		RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
136 		return 0;
137 		}
138 
139 	if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0,
140 				V_ASN1_NULL, NULL, rk, rklen))
141 		{
142 		RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
143 		return 0;
144 		}
145 
146 	return 1;
147 	}
148 
rsa_priv_decode(EVP_PKEY * pkey,PKCS8_PRIV_KEY_INFO * p8)149 static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
150 	{
151 	const unsigned char *p;
152 	int pklen;
153 	if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
154 		return 0;
155 	return old_rsa_priv_decode(pkey, &p, pklen);
156 	}
157 
int_rsa_size(const EVP_PKEY * pkey)158 static int int_rsa_size(const EVP_PKEY *pkey)
159 	{
160 	return RSA_size(pkey->pkey.rsa);
161 	}
162 
rsa_bits(const EVP_PKEY * pkey)163 static int rsa_bits(const EVP_PKEY *pkey)
164 	{
165 	return BN_num_bits(pkey->pkey.rsa->n);
166 	}
167 
int_rsa_free(EVP_PKEY * pkey)168 static void int_rsa_free(EVP_PKEY *pkey)
169 	{
170 	RSA_free(pkey->pkey.rsa);
171 	}
172 
173 
update_buflen(const BIGNUM * b,size_t * pbuflen)174 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
175 	{
176 	size_t i;
177 	if (!b)
178 		return;
179 	if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
180 			*pbuflen = i;
181 	}
182 
do_rsa_print(BIO * bp,const RSA * x,int off,int priv)183 static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
184 	{
185 	char *str;
186 	const char *s;
187 	unsigned char *m=NULL;
188 	int ret=0, mod_len = 0;
189 	size_t buf_len=0;
190 
191 	update_buflen(x->n, &buf_len);
192 	update_buflen(x->e, &buf_len);
193 
194 	if (priv)
195 		{
196 		update_buflen(x->d, &buf_len);
197 		update_buflen(x->p, &buf_len);
198 		update_buflen(x->q, &buf_len);
199 		update_buflen(x->dmp1, &buf_len);
200 		update_buflen(x->dmq1, &buf_len);
201 		update_buflen(x->iqmp, &buf_len);
202 		}
203 
204 	m=(unsigned char *)OPENSSL_malloc(buf_len+10);
205 	if (m == NULL)
206 		{
207 		RSAerr(RSA_F_DO_RSA_PRINT,ERR_R_MALLOC_FAILURE);
208 		goto err;
209 		}
210 
211 	if (x->n != NULL)
212 		mod_len = BN_num_bits(x->n);
213 
214 	if(!BIO_indent(bp,off,128))
215 		goto err;
216 
217 	if (priv && x->d)
218 		{
219 		if (BIO_printf(bp,"Private-Key: (%d bit)\n", mod_len)
220 			<= 0) goto err;
221 		str = "modulus:";
222 		s = "publicExponent:";
223 		}
224 	else
225 		{
226 		if (BIO_printf(bp,"Public-Key: (%d bit)\n", mod_len)
227 			<= 0) goto err;
228 		str = "Modulus:";
229 		s= "Exponent:";
230 		}
231 	if (!ASN1_bn_print(bp,str,x->n,m,off)) goto err;
232 	if (!ASN1_bn_print(bp,s,x->e,m,off))
233 		goto err;
234 	if (priv)
235 		{
236 		if (!ASN1_bn_print(bp,"privateExponent:",x->d,m,off))
237 			goto err;
238 		if (!ASN1_bn_print(bp,"prime1:",x->p,m,off))
239 			goto err;
240 		if (!ASN1_bn_print(bp,"prime2:",x->q,m,off))
241 			goto err;
242 		if (!ASN1_bn_print(bp,"exponent1:",x->dmp1,m,off))
243 			goto err;
244 		if (!ASN1_bn_print(bp,"exponent2:",x->dmq1,m,off))
245 			goto err;
246 		if (!ASN1_bn_print(bp,"coefficient:",x->iqmp,m,off))
247 			goto err;
248 		}
249 	ret=1;
250 err:
251 	if (m != NULL) OPENSSL_free(m);
252 	return(ret);
253 	}
254 
rsa_pub_print(BIO * bp,const EVP_PKEY * pkey,int indent,ASN1_PCTX * ctx)255 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
256 							ASN1_PCTX *ctx)
257 	{
258 	return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
259 	}
260 
261 
rsa_priv_print(BIO * bp,const EVP_PKEY * pkey,int indent,ASN1_PCTX * ctx)262 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
263 							ASN1_PCTX *ctx)
264 	{
265 	return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
266 	}
267 
268 
rsa_pkey_ctrl(EVP_PKEY * pkey,int op,long arg1,void * arg2)269 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
270 	{
271 	X509_ALGOR *alg = NULL;
272 	switch (op)
273 		{
274 
275 		case ASN1_PKEY_CTRL_PKCS7_SIGN:
276 		if (arg1 == 0)
277 			PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
278 		break;
279 
280 		case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
281 		if (arg1 == 0)
282 			PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
283 		break;
284 #ifndef OPENSSL_NO_CMS
285 		case ASN1_PKEY_CTRL_CMS_SIGN:
286 		if (arg1 == 0)
287 			CMS_SignerInfo_get0_algs(arg2, NULL, NULL, NULL, &alg);
288 		break;
289 
290 		case ASN1_PKEY_CTRL_CMS_ENVELOPE:
291 		if (arg1 == 0)
292 			CMS_RecipientInfo_ktri_get0_algs(arg2, NULL, NULL, &alg);
293 		break;
294 #endif
295 
296 		case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
297 		*(int *)arg2 = NID_sha1;
298 		return 1;
299 
300 		default:
301 		return -2;
302 
303 		}
304 
305 	if (alg)
306 		X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
307 							V_ASN1_NULL, 0);
308 
309 	return 1;
310 
311 	}
312 
313 
314 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] =
315 	{
316 		{
317 		EVP_PKEY_RSA,
318 		EVP_PKEY_RSA,
319 		ASN1_PKEY_SIGPARAM_NULL,
320 
321 		"RSA",
322 		"OpenSSL RSA method",
323 
324 		rsa_pub_decode,
325 		rsa_pub_encode,
326 		rsa_pub_cmp,
327 		rsa_pub_print,
328 
329 		rsa_priv_decode,
330 		rsa_priv_encode,
331 		rsa_priv_print,
332 
333 		int_rsa_size,
334 		rsa_bits,
335 
336 		0,0,0,0,0,0,
337 
338 		int_rsa_free,
339 		rsa_pkey_ctrl,
340 		old_rsa_priv_decode,
341 		old_rsa_priv_encode
342 		},
343 
344 		{
345 		EVP_PKEY_RSA2,
346 		EVP_PKEY_RSA,
347 		ASN1_PKEY_ALIAS
348 		}
349 	};
350