ocsp_lib.c revision 1.9 
1/* ocsp_lib.c */
2/* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL
3 * project. */
4
5/* History:
6   This file was transfered to Richard Levitte from CertCo by Kathy
7   Weinhold in mid-spring 2000 to be included in OpenSSL or released
8   as a patch kit. */
9
10/* ====================================================================
11 * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 *    notice, this list of conditions and the following disclaimer.
19 *
20 * 2. Redistributions in binary form must reproduce the above copyright
21 *    notice, this list of conditions and the following disclaimer in
22 *    the documentation and/or other materials provided with the
23 *    distribution.
24 *
25 * 3. All advertising materials mentioning features or use of this
26 *    software must display the following acknowledgment:
27 *    "This product includes software developed by the OpenSSL Project
28 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
29 *
30 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
31 *    endorse or promote products derived from this software without
32 *    prior written permission. For written permission, please contact
33 *    openssl-core@openssl.org.
34 *
35 * 5. Products derived from this software may not be called "OpenSSL"
36 *    nor may "OpenSSL" appear in their names without prior written
37 *    permission of the OpenSSL Project.
38 *
39 * 6. Redistributions of any form whatsoever must retain the following
40 *    acknowledgment:
41 *    "This product includes software developed by the OpenSSL Project
42 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
43 *
44 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
45 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
47 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
48 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
49 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
51 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
53 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
54 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
55 * OF THE POSSIBILITY OF SUCH DAMAGE.
56 * ====================================================================
57 *
58 * This product includes cryptographic software written by Eric Young
59 * (eay@cryptsoft.com).  This product includes software written by Tim
60 * Hudson (tjh@cryptsoft.com).
61 *
62 */
63
64#include <stdio.h>
65#include <cryptlib.h>
66#include <openssl/objects.h>
67#include <openssl/rand.h>
68#include <openssl/x509.h>
69#include <openssl/pem.h>
70#include <openssl/x509v3.h>
71#include <openssl/ocsp.h>
72#include <openssl/asn1t.h>
73
74/* Convert a certificate and its issuer to an OCSP_CERTID */
75
76OCSP_CERTID *
77OCSP_cert_to_id(const EVP_MD *dgst, X509 *subject, X509 *issuer)
78{
79	X509_NAME *iname;
80	ASN1_INTEGER *serial;
81	ASN1_BIT_STRING *ikey;
82
83#ifndef OPENSSL_NO_SHA1
84	if (!dgst)
85		dgst = EVP_sha1();
86#endif
87	if (subject) {
88		iname = X509_get_issuer_name(subject);
89		serial = X509_get_serialNumber(subject);
90	} else {
91		iname = X509_get_subject_name(issuer);
92		serial = NULL;
93	}
94	ikey = X509_get0_pubkey_bitstr(issuer);
95	return OCSP_cert_id_new(dgst, iname, ikey, serial);
96}
97
98OCSP_CERTID *
99OCSP_cert_id_new(const EVP_MD *dgst, X509_NAME *issuerName,
100    ASN1_BIT_STRING* issuerKey, ASN1_INTEGER *serialNumber)
101{
102	int nid;
103	unsigned int i;
104	X509_ALGOR *alg;
105	OCSP_CERTID *cid = NULL;
106	unsigned char md[EVP_MAX_MD_SIZE];
107
108	if (!(cid = OCSP_CERTID_new()))
109		goto err;
110
111	alg = cid->hashAlgorithm;
112	if (alg->algorithm != NULL)
113		ASN1_OBJECT_free(alg->algorithm);
114	if ((nid = EVP_MD_type(dgst)) == NID_undef) {
115		OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_UNKNOWN_NID);
116		goto err;
117	}
118	if (!(alg->algorithm = OBJ_nid2obj(nid)))
119		goto err;
120	if ((alg->parameter = ASN1_TYPE_new()) == NULL)
121		goto err;
122	alg->parameter->type = V_ASN1_NULL;
123
124	if (!X509_NAME_digest(issuerName, dgst, md, &i))
125		goto digerr;
126	if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i)))
127		goto err;
128
129	/* Calculate the issuerKey hash, excluding tag and length */
130	if (!EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL))
131		goto err;
132
133	if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i)))
134		goto err;
135
136	if (serialNumber) {
137		ASN1_INTEGER_free(cid->serialNumber);
138		if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber)))
139			goto err;
140	}
141	return cid;
142
143digerr:
144	OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_DIGEST_ERR);
145err:
146	if (cid)
147		OCSP_CERTID_free(cid);
148	return NULL;
149}
150
151int
152OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
153{
154	int ret;
155
156	ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm);
157	if (ret)
158		return ret;
159	ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash);
160	if (ret)
161		return ret;
162	return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash);
163}
164
165int
166OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
167{
168	int ret;
169
170	ret = OCSP_id_issuer_cmp(a, b);
171	if (ret)
172		return ret;
173	return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber);
174}
175
176/* Parse a URL and split it up into host, port and path components and whether
177 * it is SSL.
178 */
179int
180OCSP_parse_url(char *url, char **phost, char **pport, char **ppath, int *pssl)
181{
182	char *p, *buf;
183	char *host, *port;
184
185	*phost = NULL;
186	*pport = NULL;
187	*ppath = NULL;
188
189	/* dup the buffer since we are going to mess with it */
190	buf = BUF_strdup(url);
191	if (!buf)
192		goto mem_err;
193
194	/* Check for initial colon */
195	p = strchr(buf, ':');
196	if (!p)
197		goto parse_err;
198
199	*(p++) = '\0';
200
201	if (!strcmp(buf, "http")) {
202		*pssl = 0;
203		port = "80";
204	} else if (!strcmp(buf, "https")) {
205		*pssl = 1;
206		port = "443";
207	} else
208		goto parse_err;
209
210	/* Check for double slash */
211	if ((p[0] != '/') || (p[1] != '/'))
212		goto parse_err;
213
214	p += 2;
215
216	host = p;
217
218	/* Check for trailing part of path */
219	p = strchr(p, '/');
220	if (!p)
221		*ppath = BUF_strdup("/");
222	else {
223		*ppath = BUF_strdup(p);
224		/* Set start of path to 0 so hostname is valid */
225		*p = '\0';
226	}
227
228	if (!*ppath)
229		goto mem_err;
230
231	/* Look for optional ':' for port number */
232	if ((p = strchr(host, ':'))) {
233		*p = 0;
234		port = p + 1;
235	} else {
236		/* Not found: set default port */
237		if (*pssl)
238			port = "443";
239		else
240			port = "80";
241	}
242
243	*pport = BUF_strdup(port);
244	if (!*pport)
245		goto mem_err;
246
247	*phost = BUF_strdup(host);
248
249	if (!*phost)
250		goto mem_err;
251
252	free(buf);
253
254	return 1;
255
256mem_err:
257	OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE);
258	goto err;
259
260parse_err:
261	OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL);
262
263err:
264	free(buf);
265	free(*ppath);
266	free(*pport);
267	free(*phost);
268	return 0;
269}
270
271IMPLEMENT_ASN1_DUP_FUNCTION(OCSP_CERTID)
272