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 <openssl/local/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 <openssl/local/asn1_locl.h>
69
70static 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
85static 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
101static 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
109static 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
122static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
123	{
124	return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
125	}
126
127static 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
149static 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
158static int int_rsa_size(const EVP_PKEY *pkey)
159	{
160	return RSA_size(pkey->pkey.rsa);
161	}
162
163static int rsa_bits(const EVP_PKEY *pkey)
164	{
165	return BN_num_bits(pkey->pkey.rsa->n);
166	}
167
168static void int_rsa_free(EVP_PKEY *pkey)
169	{
170	RSA_free(pkey->pkey.rsa);
171	}
172
173
174static 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
183static 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;
250err:
251	if (m != NULL) OPENSSL_free(m);
252	return(ret);
253	}
254
255static 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
262static 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
269static 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
314const 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