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1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2  * All rights reserved.
3  *
4  * This package is an SSL implementation written
5  * by Eric Young (eay@cryptsoft.com).
6  * The implementation was written so as to conform with Netscapes SSL.
7  *
8  * This library is free for commercial and non-commercial use as long as
9  * the following conditions are aheared to.  The following conditions
10  * apply to all code found in this distribution, be it the RC4, RSA,
11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
12  * included with this distribution is covered by the same copyright terms
13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14  *
15  * Copyright remains Eric Young's, and as such any Copyright notices in
16  * the code are not to be removed.
17  * If this package is used in a product, Eric Young should be given attribution
18  * as the author of the parts of the library used.
19  * This can be in the form of a textual message at program startup or
20  * in documentation (online or textual) provided with the package.
21  *
22  * Redistribution and use in source and binary forms, with or without
23  * modification, are permitted provided that the following conditions
24  * are met:
25  * 1. Redistributions of source code must retain the copyright
26  *    notice, this list of conditions and the following disclaimer.
27  * 2. Redistributions in binary form must reproduce the above copyright
28  *    notice, this list of conditions and the following disclaimer in the
29  *    documentation and/or other materials provided with the distribution.
30  * 3. All advertising materials mentioning features or use of this software
31  *    must display the following acknowledgement:
32  *    "This product includes cryptographic software written by
33  *     Eric Young (eay@cryptsoft.com)"
34  *    The word 'cryptographic' can be left out if the rouines from the library
35  *    being used are not cryptographic related :-).
36  * 4. If you include any Windows specific code (or a derivative thereof) from
37  *    the apps directory (application code) you must include an acknowledgement:
38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39  *
40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50  * SUCH DAMAGE.
51  *
52  * The licence and distribution terms for any publically available version or
53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
54  * copied and put under another distribution licence
55  * [including the GNU Public Licence.] */
56 
57 #include <openssl/pem.h>
58 
59 #include <stdio.h>
60 
61 #include <openssl/buf.h>
62 #include <openssl/dh.h>
63 #include <openssl/err.h>
64 #include <openssl/evp.h>
65 #include <openssl/mem.h>
66 #include <openssl/obj.h>
67 #include <openssl/pkcs8.h>
68 #include <openssl/rand.h>
69 #include <openssl/x509.h>
70 
71 #include "../evp/internal.h"
72 
73 
74 int pem_check_suffix(const char *pem_str, const char *suffix);
75 
PEM_read_bio_PrivateKey(BIO * bp,EVP_PKEY ** x,pem_password_cb * cb,void * u)76 EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u)
77 	{
78 	char *nm=NULL;
79 	const unsigned char *p=NULL;
80 	unsigned char *data=NULL;
81 	long len;
82 	int slen;
83 	EVP_PKEY *ret=NULL;
84 
85 	if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_EVP_PKEY, bp, cb, u))
86 		return NULL;
87 	p = data;
88 
89 	if (strcmp(nm,PEM_STRING_PKCS8INF) == 0) {
90 		PKCS8_PRIV_KEY_INFO *p8inf;
91 		p8inf=d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len);
92 		if(!p8inf) goto p8err;
93 		ret = EVP_PKCS82PKEY(p8inf);
94 		if(x) {
95 			if(*x) EVP_PKEY_free((EVP_PKEY *)*x);
96 			*x = ret;
97 		}
98 		PKCS8_PRIV_KEY_INFO_free(p8inf);
99 	} else if (strcmp(nm,PEM_STRING_PKCS8) == 0) {
100 		PKCS8_PRIV_KEY_INFO *p8inf;
101 		X509_SIG *p8;
102 		int klen;
103 		char psbuf[PEM_BUFSIZE];
104 		p8 = d2i_X509_SIG(NULL, &p, len);
105 		if(!p8) goto p8err;
106 
107 		klen = 0;
108 		if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u);
109 		if (klen <= 0) {
110 			OPENSSL_PUT_ERROR(PEM, PEM_read_bio_PrivateKey, PEM_R_BAD_PASSWORD_READ);
111 			X509_SIG_free(p8);
112 			goto err;
113 		}
114 		p8inf = PKCS8_decrypt(p8, psbuf, klen);
115 		X509_SIG_free(p8);
116 		if(!p8inf) goto p8err;
117 		ret = EVP_PKCS82PKEY(p8inf);
118 		if(x) {
119 			if(*x) EVP_PKEY_free((EVP_PKEY *)*x);
120 			*x = ret;
121 		}
122 		PKCS8_PRIV_KEY_INFO_free(p8inf);
123 	} else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0)
124 		{
125 		const EVP_PKEY_ASN1_METHOD *ameth;
126 		ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
127 		if (!ameth || !ameth->old_priv_decode)
128 			goto p8err;
129 		ret=d2i_PrivateKey(ameth->pkey_id,x,&p,len);
130 		}
131 p8err:
132 	if (ret == NULL)
133 		OPENSSL_PUT_ERROR(PEM, PEM_read_bio_PrivateKey, ERR_R_ASN1_LIB);
134 
135 err:
136 	OPENSSL_free(nm);
137 	OPENSSL_cleanse(data, len);
138 	OPENSSL_free(data);
139 	return(ret);
140 	}
141 
PEM_write_bio_PrivateKey(BIO * bp,EVP_PKEY * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * cb,void * u)142 int PEM_write_bio_PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
143                                                unsigned char *kstr, int klen,
144                                                pem_password_cb *cb, void *u)
145 	{
146 	char pem_str[80];
147 	if (!x->ameth || x->ameth->priv_encode)
148 		return PEM_write_bio_PKCS8PrivateKey(bp, x, enc,
149 							(char *)kstr, klen,
150 							cb, u);
151 
152 	BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
153 	return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
154 				pem_str,bp,x,enc,kstr,klen,cb,u);
155 	}
156 
public_key_type_from_str(const char * name,size_t len)157 static int public_key_type_from_str(const char *name, size_t len) {
158   if (len == 3 && memcmp(name, "RSA", 3) == 0) {
159     return EVP_PKEY_RSA;
160   } else if (len == 2 && memcmp(name, "DH", 2) == 0) {
161     return EVP_PKEY_DH;
162   } else if (len == 2 && memcmp(name, "EC", 2) == 0) {
163     return EVP_PKEY_EC;
164   }
165   return NID_undef;
166 }
167 
set_pkey_type_from_str(EVP_PKEY * pkey,const char * name,size_t len)168 static int set_pkey_type_from_str(EVP_PKEY *pkey, const char *name, size_t len) {
169   int nid = public_key_type_from_str(name, len);
170   if (nid == NID_undef) {
171     return 0;
172   }
173   return EVP_PKEY_set_type(pkey, nid);
174 }
175 
PEM_read_bio_Parameters(BIO * bp,EVP_PKEY ** x)176 EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x)
177 	{
178 	char *nm=NULL;
179 	const unsigned char *p=NULL;
180 	unsigned char *data=NULL;
181 	long len;
182 	int slen;
183 	EVP_PKEY *ret=NULL;
184 
185 	if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS,
186 								bp, 0, NULL))
187 		return NULL;
188 	p = data;
189 
190 	if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0)
191 		{
192 		ret = EVP_PKEY_new();
193 		if (!ret)
194 			goto err;
195 		if (!set_pkey_type_from_str(ret, nm, slen)
196 			|| !ret->ameth->param_decode
197 			|| !ret->ameth->param_decode(ret, &p, len))
198 			{
199 			EVP_PKEY_free(ret);
200 			ret = NULL;
201 			goto err;
202 			}
203 		if(x)
204 			{
205 			if(*x) EVP_PKEY_free((EVP_PKEY *)*x);
206 			*x = ret;
207 			}
208 		}
209 err:
210 	if (ret == NULL)
211 		OPENSSL_PUT_ERROR(PEM, PEM_read_bio_Parameters, ERR_R_ASN1_LIB);
212 	OPENSSL_free(nm);
213 	OPENSSL_free(data);
214 	return(ret);
215 	}
216 
PEM_write_bio_Parameters(BIO * bp,EVP_PKEY * x)217 int PEM_write_bio_Parameters(BIO *bp, EVP_PKEY *x)
218 	{
219 	char pem_str[80];
220 	if (!x->ameth || !x->ameth->param_encode)
221 		return 0;
222 
223 	BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
224 	return PEM_ASN1_write_bio(
225 		(i2d_of_void *)x->ameth->param_encode,
226 				pem_str,bp,x,NULL,NULL,0,0,NULL);
227 	}
228 
229 #ifndef OPENSSL_NO_FP_API
PEM_read_PrivateKey(FILE * fp,EVP_PKEY ** x,pem_password_cb * cb,void * u)230 EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, void *u)
231 	{
232         BIO *b;
233         EVP_PKEY *ret;
234 
235         if ((b=BIO_new(BIO_s_file())) == NULL)
236 		{
237 		OPENSSL_PUT_ERROR(PEM, PEM_read_PrivateKey, ERR_R_BUF_LIB);
238                 return(0);
239 		}
240         BIO_set_fp(b,fp,BIO_NOCLOSE);
241         ret=PEM_read_bio_PrivateKey(b,x,cb,u);
242         BIO_free(b);
243         return(ret);
244 	}
245 
PEM_write_PrivateKey(FILE * fp,EVP_PKEY * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * cb,void * u)246 int PEM_write_PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
247                                                unsigned char *kstr, int klen,
248                                                pem_password_cb *cb, void *u)
249 	{
250         BIO *b;
251         int ret;
252 
253         if ((b=BIO_new_fp(fp, BIO_NOCLOSE)) == NULL)
254 		{
255 		OPENSSL_PUT_ERROR(PEM, PEM_write_PrivateKey, ERR_R_BUF_LIB);
256                 return 0;
257 		}
258         ret=PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u);
259         BIO_free(b);
260         return ret;
261 	}
262 
263 #endif
264 
265 
266 /* Transparently read in PKCS#3 or X9.42 DH parameters */
267 
PEM_read_bio_DHparams(BIO * bp,DH ** x,pem_password_cb * cb,void * u)268 DH *PEM_read_bio_DHparams(BIO *bp, DH **x, pem_password_cb *cb, void *u)
269 	{
270 	char *nm=NULL;
271 	const unsigned char *p=NULL;
272 	unsigned char *data=NULL;
273 	long len;
274 	DH *ret=NULL;
275 
276 	if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_DHPARAMS,
277 								bp, cb, u))
278 		return NULL;
279 	p = data;
280 
281         /* TODO(fork): remove? */
282 	/*if (!strcmp(nm, PEM_STRING_DHXPARAMS))
283 		ret = d2i_DHxparams(x, &p, len);
284 	else */
285 		ret = d2i_DHparams(x, &p, len);
286 
287 	if (ret == NULL)
288 		OPENSSL_PUT_ERROR(PEM, PEM_read_bio_DHparams, ERR_R_ASN1_LIB);
289 	OPENSSL_free(nm);
290 	OPENSSL_free(data);
291 	return ret;
292 	}
293 
294 #ifndef OPENSSL_NO_FP_API
PEM_read_DHparams(FILE * fp,DH ** x,pem_password_cb * cb,void * u)295 DH *PEM_read_DHparams(FILE *fp, DH **x, pem_password_cb *cb, void *u)
296 	{
297         BIO *b;
298         DH *ret;
299 
300         if ((b=BIO_new(BIO_s_file())) == NULL)
301 		{
302 		OPENSSL_PUT_ERROR(PEM, PEM_read_DHparams, ERR_R_BUF_LIB);
303                 return(0);
304 		}
305         BIO_set_fp(b,fp,BIO_NOCLOSE);
306         ret=PEM_read_bio_DHparams(b,x,cb,u);
307         BIO_free(b);
308         return(ret);
309 	}
310 #endif
311 
312