1/* ocsp_lib.c */
2/*
3 * Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL
4 * project.
5 */
6
7/*
8 * History: This file was transfered to Richard Levitte from CertCo by Kathy
9 * Weinhold in mid-spring 2000 to be included in OpenSSL or released as a
10 * patch kit.
11 */
12
13/* ====================================================================
14 * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 *
20 * 1. Redistributions of source code must retain the above copyright
21 *    notice, this list of conditions and the following disclaimer.
22 *
23 * 2. Redistributions in binary form must reproduce the above copyright
24 *    notice, this list of conditions and the following disclaimer in
25 *    the documentation and/or other materials provided with the
26 *    distribution.
27 *
28 * 3. All advertising materials mentioning features or use of this
29 *    software must display the following acknowledgment:
30 *    "This product includes software developed by the OpenSSL Project
31 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
32 *
33 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
34 *    endorse or promote products derived from this software without
35 *    prior written permission. For written permission, please contact
36 *    openssl-core@openssl.org.
37 *
38 * 5. Products derived from this software may not be called "OpenSSL"
39 *    nor may "OpenSSL" appear in their names without prior written
40 *    permission of the OpenSSL Project.
41 *
42 * 6. Redistributions of any form whatsoever must retain the following
43 *    acknowledgment:
44 *    "This product includes software developed by the OpenSSL Project
45 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
48 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
50 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
51 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
53 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
54 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
56 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
57 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
58 * OF THE POSSIBILITY OF SUCH DAMAGE.
59 * ====================================================================
60 *
61 * This product includes cryptographic software written by Eric Young
62 * (eay@cryptsoft.com).  This product includes software written by Tim
63 * Hudson (tjh@cryptsoft.com).
64 *
65 */
66
67#include <stdio.h>
68#include <cryptlib.h>
69#include <openssl/objects.h>
70#include <openssl/rand.h>
71#include <openssl/x509.h>
72#include <openssl/pem.h>
73#include <openssl/x509v3.h>
74#include <openssl/ocsp.h>
75#include <openssl/asn1t.h>
76
77/* Convert a certificate and its issuer to an OCSP_CERTID */
78
79OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, X509 *subject, X509 *issuer)
80{
81    X509_NAME *iname;
82    ASN1_INTEGER *serial;
83    ASN1_BIT_STRING *ikey;
84#ifndef OPENSSL_NO_SHA1
85    if (!dgst)
86        dgst = EVP_sha1();
87#endif
88    if (subject) {
89        iname = X509_get_issuer_name(subject);
90        serial = X509_get_serialNumber(subject);
91    } else {
92        iname = X509_get_subject_name(issuer);
93        serial = NULL;
94    }
95    ikey = X509_get0_pubkey_bitstr(issuer);
96    return OCSP_cert_id_new(dgst, iname, ikey, serial);
97}
98
99OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst,
100                              X509_NAME *issuerName,
101                              ASN1_BIT_STRING *issuerKey,
102                              ASN1_INTEGER *serialNumber)
103{
104    int nid;
105    unsigned int i;
106    X509_ALGOR *alg;
107    OCSP_CERTID *cid = NULL;
108    unsigned char md[EVP_MAX_MD_SIZE];
109
110    if (!(cid = OCSP_CERTID_new()))
111        goto err;
112
113    alg = cid->hashAlgorithm;
114    if (alg->algorithm != NULL)
115        ASN1_OBJECT_free(alg->algorithm);
116    if ((nid = EVP_MD_type(dgst)) == NID_undef) {
117        OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_UNKNOWN_NID);
118        goto err;
119    }
120    if (!(alg->algorithm = OBJ_nid2obj(nid)))
121        goto err;
122    if ((alg->parameter = ASN1_TYPE_new()) == NULL)
123        goto err;
124    alg->parameter->type = V_ASN1_NULL;
125
126    if (!X509_NAME_digest(issuerName, dgst, md, &i))
127        goto digerr;
128    if (!(ASN1_OCTET_STRING_set(cid->issuerNameHash, md, i)))
129        goto err;
130
131    /* Calculate the issuerKey hash, excluding tag and length */
132    if (!EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL))
133        goto err;
134
135    if (!(ASN1_OCTET_STRING_set(cid->issuerKeyHash, md, i)))
136        goto err;
137
138    if (serialNumber) {
139        ASN1_INTEGER_free(cid->serialNumber);
140        if (!(cid->serialNumber = ASN1_INTEGER_dup(serialNumber)))
141            goto err;
142    }
143    return cid;
144 digerr:
145    OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_DIGEST_ERR);
146 err:
147    if (cid)
148        OCSP_CERTID_free(cid);
149    return NULL;
150}
151
152int OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
153{
154    int ret;
155    ret = OBJ_cmp(a->hashAlgorithm->algorithm, b->hashAlgorithm->algorithm);
156    if (ret)
157        return ret;
158    ret = ASN1_OCTET_STRING_cmp(a->issuerNameHash, b->issuerNameHash);
159    if (ret)
160        return ret;
161    return ASN1_OCTET_STRING_cmp(a->issuerKeyHash, b->issuerKeyHash);
162}
163
164int OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b)
165{
166    int ret;
167    ret = OCSP_id_issuer_cmp(a, b);
168    if (ret)
169        return ret;
170    return ASN1_INTEGER_cmp(a->serialNumber, b->serialNumber);
171}
172
173/*
174 * Parse a URL and split it up into host, port and path components and
175 * whether it is SSL.
176 */
177
178int OCSP_parse_url(const char *url, char **phost, char **pport, char **ppath,
179                   int *pssl)
180{
181    char *p, *buf;
182
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
197    if (!p)
198        goto parse_err;
199
200    *(p++) = '\0';
201
202    if (!strcmp(buf, "http")) {
203        *pssl = 0;
204        port = "80";
205    } else if (!strcmp(buf, "https")) {
206        *pssl = 1;
207        port = "443";
208    } else
209        goto parse_err;
210
211    /* Check for double slash */
212    if ((p[0] != '/') || (p[1] != '/'))
213        goto parse_err;
214
215    p += 2;
216
217    host = p;
218
219    /* Check for trailing part of path */
220
221    p = strchr(p, '/');
222
223    if (!p)
224        *ppath = BUF_strdup("/");
225    else {
226        *ppath = BUF_strdup(p);
227        /* Set start of path to 0 so hostname is valid */
228        *p = '\0';
229    }
230
231    if (!*ppath)
232        goto mem_err;
233
234    p = host;
235    if (host[0] == '[') {
236        /* ipv6 literal */
237        host++;
238        p = strchr(host, ']');
239        if (!p)
240            goto parse_err;
241        *p = '\0';
242        p++;
243    }
244
245    /* Look for optional ':' for port number */
246    if ((p = strchr(p, ':'))) {
247        *p = 0;
248        port = p + 1;
249    }
250
251    *pport = BUF_strdup(port);
252    if (!*pport)
253        goto mem_err;
254
255    *phost = BUF_strdup(host);
256
257    if (!*phost)
258        goto mem_err;
259
260    OPENSSL_free(buf);
261
262    return 1;
263
264 mem_err:
265    OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE);
266    goto err;
267
268 parse_err:
269    OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL);
270
271 err:
272    if (buf)
273        OPENSSL_free(buf);
274    if (*ppath) {
275        OPENSSL_free(*ppath);
276        *ppath = NULL;
277    }
278    if (*pport) {
279        OPENSSL_free(*pport);
280        *pport = NULL;
281    }
282    if (*phost) {
283        OPENSSL_free(*phost);
284        *phost = NULL;
285    }
286    return 0;
287
288}
289
290IMPLEMENT_ASN1_DUP_FUNCTION(OCSP_CERTID)
291