1 /*
2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <stdio.h>
11 #include "internal/cryptlib.h"
12 #include <openssl/bn.h>
13 #include <openssl/evp.h>
14 #include <openssl/asn1.h>
15 #include <openssl/asn1t.h>
16 #include <openssl/x509.h>
17 #include "crypto/x509.h"
18 #include <openssl/objects.h>
19 #include <openssl/buffer.h>
20 #include <openssl/pem.h>
21
X509_to_X509_REQ(X509 * x,EVP_PKEY * pkey,const EVP_MD * md)22 X509_REQ *X509_to_X509_REQ(X509 *x, EVP_PKEY *pkey, const EVP_MD *md)
23 {
24 X509_REQ *ret;
25 X509_REQ_INFO *ri;
26 int i;
27 EVP_PKEY *pktmp;
28
29 ret = X509_REQ_new_ex(x->libctx, x->propq);
30 if (ret == NULL) {
31 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
32 goto err;
33 }
34
35 ri = &ret->req_info;
36
37 ri->version->length = 1;
38 ri->version->data = OPENSSL_malloc(1);
39 if (ri->version->data == NULL)
40 goto err;
41 ri->version->data[0] = 0; /* version == 0 */
42
43 if (!X509_REQ_set_subject_name(ret, X509_get_subject_name(x)))
44 goto err;
45
46 pktmp = X509_get0_pubkey(x);
47 if (pktmp == NULL)
48 goto err;
49 i = X509_REQ_set_pubkey(ret, pktmp);
50 if (!i)
51 goto err;
52
53 if (pkey != NULL) {
54 if (!X509_REQ_sign(ret, pkey, md))
55 goto err;
56 }
57 return ret;
58 err:
59 X509_REQ_free(ret);
60 return NULL;
61 }
62
X509_REQ_get_pubkey(X509_REQ * req)63 EVP_PKEY *X509_REQ_get_pubkey(X509_REQ *req)
64 {
65 if (req == NULL)
66 return NULL;
67 return X509_PUBKEY_get(req->req_info.pubkey);
68 }
69
X509_REQ_get0_pubkey(const X509_REQ * req)70 EVP_PKEY *X509_REQ_get0_pubkey(const X509_REQ *req)
71 {
72 if (req == NULL)
73 return NULL;
74 return X509_PUBKEY_get0(req->req_info.pubkey);
75 }
76
X509_REQ_get_X509_PUBKEY(X509_REQ * req)77 X509_PUBKEY *X509_REQ_get_X509_PUBKEY(X509_REQ *req)
78 {
79 return req->req_info.pubkey;
80 }
81
X509_REQ_check_private_key(const X509_REQ * req,EVP_PKEY * pkey)82 int X509_REQ_check_private_key(const X509_REQ *req, EVP_PKEY *pkey)
83 {
84 return ossl_x509_check_private_key(X509_REQ_get0_pubkey(req), pkey);
85 }
86
87 /*
88 * It seems several organisations had the same idea of including a list of
89 * extensions in a certificate request. There are at least two OIDs that are
90 * used and there may be more: so the list is configurable.
91 */
92
93 static int ext_nid_list[] = { NID_ext_req, NID_ms_ext_req, NID_undef };
94
95 static int *ext_nids = ext_nid_list;
96
X509_REQ_extension_nid(int req_nid)97 int X509_REQ_extension_nid(int req_nid)
98 {
99 int i, nid;
100 for (i = 0;; i++) {
101 nid = ext_nids[i];
102 if (nid == NID_undef)
103 return 0;
104 else if (req_nid == nid)
105 return 1;
106 }
107 }
108
X509_REQ_get_extension_nids(void)109 int *X509_REQ_get_extension_nids(void)
110 {
111 return ext_nids;
112 }
113
X509_REQ_set_extension_nids(int * nids)114 void X509_REQ_set_extension_nids(int *nids)
115 {
116 ext_nids = nids;
117 }
118
STACK_OF(X509_EXTENSION)119 STACK_OF(X509_EXTENSION) *X509_REQ_get_extensions(X509_REQ *req)
120 {
121 X509_ATTRIBUTE *attr;
122 ASN1_TYPE *ext = NULL;
123 int idx, *pnid;
124 const unsigned char *p;
125
126 if ((req == NULL) || !ext_nids)
127 return NULL;
128 for (pnid = ext_nids; *pnid != NID_undef; pnid++) {
129 idx = X509_REQ_get_attr_by_NID(req, *pnid, -1);
130 if (idx < 0)
131 continue;
132 attr = X509_REQ_get_attr(req, idx);
133 ext = X509_ATTRIBUTE_get0_type(attr, 0);
134 break;
135 }
136 if (ext == NULL) /* no extensions is not an error */
137 return sk_X509_EXTENSION_new_null();
138 if (ext->type != V_ASN1_SEQUENCE) {
139 ERR_raise(ERR_LIB_X509, X509_R_WRONG_TYPE);
140 return NULL;
141 }
142 p = ext->value.sequence->data;
143 return (STACK_OF(X509_EXTENSION) *)
144 ASN1_item_d2i(NULL, &p, ext->value.sequence->length,
145 ASN1_ITEM_rptr(X509_EXTENSIONS));
146 }
147
148 /*
149 * Add a STACK_OF extensions to a certificate request: allow alternative OIDs
150 * in case we want to create a non standard one.
151 */
X509_REQ_add_extensions_nid(X509_REQ * req,const STACK_OF (X509_EXTENSION)* exts,int nid)152 int X509_REQ_add_extensions_nid(X509_REQ *req,
153 const STACK_OF(X509_EXTENSION) *exts, int nid)
154 {
155 int extlen;
156 int rv = 0;
157 unsigned char *ext = NULL;
158
159 /* Generate encoding of extensions */
160 extlen = ASN1_item_i2d((const ASN1_VALUE *)exts, &ext,
161 ASN1_ITEM_rptr(X509_EXTENSIONS));
162 if (extlen <= 0)
163 return 0;
164 rv = X509_REQ_add1_attr_by_NID(req, nid, V_ASN1_SEQUENCE, ext, extlen);
165 OPENSSL_free(ext);
166 return rv;
167 }
168
169 /* This is the normal usage: use the "official" OID */
X509_REQ_add_extensions(X509_REQ * req,const STACK_OF (X509_EXTENSION)* exts)170 int X509_REQ_add_extensions(X509_REQ *req, const STACK_OF(X509_EXTENSION) *exts)
171 {
172 return X509_REQ_add_extensions_nid(req, exts, NID_ext_req);
173 }
174
175 /* Request attribute functions */
176
X509_REQ_get_attr_count(const X509_REQ * req)177 int X509_REQ_get_attr_count(const X509_REQ *req)
178 {
179 return X509at_get_attr_count(req->req_info.attributes);
180 }
181
X509_REQ_get_attr_by_NID(const X509_REQ * req,int nid,int lastpos)182 int X509_REQ_get_attr_by_NID(const X509_REQ *req, int nid, int lastpos)
183 {
184 return X509at_get_attr_by_NID(req->req_info.attributes, nid, lastpos);
185 }
186
X509_REQ_get_attr_by_OBJ(const X509_REQ * req,const ASN1_OBJECT * obj,int lastpos)187 int X509_REQ_get_attr_by_OBJ(const X509_REQ *req, const ASN1_OBJECT *obj,
188 int lastpos)
189 {
190 return X509at_get_attr_by_OBJ(req->req_info.attributes, obj, lastpos);
191 }
192
X509_REQ_get_attr(const X509_REQ * req,int loc)193 X509_ATTRIBUTE *X509_REQ_get_attr(const X509_REQ *req, int loc)
194 {
195 return X509at_get_attr(req->req_info.attributes, loc);
196 }
197
X509_REQ_delete_attr(X509_REQ * req,int loc)198 X509_ATTRIBUTE *X509_REQ_delete_attr(X509_REQ *req, int loc)
199 {
200 return X509at_delete_attr(req->req_info.attributes, loc);
201 }
202
X509_REQ_add1_attr(X509_REQ * req,X509_ATTRIBUTE * attr)203 int X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr)
204 {
205 if (X509at_add1_attr(&req->req_info.attributes, attr))
206 return 1;
207 return 0;
208 }
209
X509_REQ_add1_attr_by_OBJ(X509_REQ * req,const ASN1_OBJECT * obj,int type,const unsigned char * bytes,int len)210 int X509_REQ_add1_attr_by_OBJ(X509_REQ *req,
211 const ASN1_OBJECT *obj, int type,
212 const unsigned char *bytes, int len)
213 {
214 if (X509at_add1_attr_by_OBJ(&req->req_info.attributes, obj,
215 type, bytes, len))
216 return 1;
217 return 0;
218 }
219
X509_REQ_add1_attr_by_NID(X509_REQ * req,int nid,int type,const unsigned char * bytes,int len)220 int X509_REQ_add1_attr_by_NID(X509_REQ *req,
221 int nid, int type,
222 const unsigned char *bytes, int len)
223 {
224 if (X509at_add1_attr_by_NID(&req->req_info.attributes, nid,
225 type, bytes, len))
226 return 1;
227 return 0;
228 }
229
X509_REQ_add1_attr_by_txt(X509_REQ * req,const char * attrname,int type,const unsigned char * bytes,int len)230 int X509_REQ_add1_attr_by_txt(X509_REQ *req,
231 const char *attrname, int type,
232 const unsigned char *bytes, int len)
233 {
234 if (X509at_add1_attr_by_txt(&req->req_info.attributes, attrname,
235 type, bytes, len))
236 return 1;
237 return 0;
238 }
239
X509_REQ_get_version(const X509_REQ * req)240 long X509_REQ_get_version(const X509_REQ *req)
241 {
242 return ASN1_INTEGER_get(req->req_info.version);
243 }
244
X509_REQ_get_subject_name(const X509_REQ * req)245 X509_NAME *X509_REQ_get_subject_name(const X509_REQ *req)
246 {
247 return req->req_info.subject;
248 }
249
X509_REQ_get0_signature(const X509_REQ * req,const ASN1_BIT_STRING ** psig,const X509_ALGOR ** palg)250 void X509_REQ_get0_signature(const X509_REQ *req, const ASN1_BIT_STRING **psig,
251 const X509_ALGOR **palg)
252 {
253 if (psig != NULL)
254 *psig = req->signature;
255 if (palg != NULL)
256 *palg = &req->sig_alg;
257 }
258
X509_REQ_set0_signature(X509_REQ * req,ASN1_BIT_STRING * psig)259 void X509_REQ_set0_signature(X509_REQ *req, ASN1_BIT_STRING *psig)
260 {
261 if (req->signature)
262 ASN1_BIT_STRING_free(req->signature);
263 req->signature = psig;
264 }
265
X509_REQ_set1_signature_algo(X509_REQ * req,X509_ALGOR * palg)266 int X509_REQ_set1_signature_algo(X509_REQ *req, X509_ALGOR *palg)
267 {
268 return X509_ALGOR_copy(&req->sig_alg, palg);
269 }
270
X509_REQ_get_signature_nid(const X509_REQ * req)271 int X509_REQ_get_signature_nid(const X509_REQ *req)
272 {
273 return OBJ_obj2nid(req->sig_alg.algorithm);
274 }
275
i2d_re_X509_REQ_tbs(X509_REQ * req,unsigned char ** pp)276 int i2d_re_X509_REQ_tbs(X509_REQ *req, unsigned char **pp)
277 {
278 req->req_info.enc.modified = 1;
279 return i2d_X509_REQ_INFO(&req->req_info, pp);
280 }
281