2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
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
11 #include "internal/cryptlib.h"
12 #include <openssl/asn1t.h>
13 #include <openssl/x509.h>
14 #include "crypto/x509.h"
17 * X509_REQ_INFO is handled in an unusual way to get round
18 * invalid encodings. Some broken certificate requests don't
19 * encode the attributes field if it is empty. This is in
20 * violation of PKCS#10 but we need to tolerate it. We do
21 * this by making the attributes field OPTIONAL then using
22 * the callback to initialise it to an empty STACK.
24 * This means that the field will be correctly encoded unless
25 * we NULL out the field.
27 * As a result we no longer need the req_kludge field because
28 * the information is now contained in the attributes field:
29 * 1. If it is NULL then it's the invalid omission.
30 * 2. If it is empty it is the correct encoding.
31 * 3. If it is not empty then some attributes are present.
35 static int rinf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
38 X509_REQ_INFO *rinf = (X509_REQ_INFO *)*pval;
40 if (operation == ASN1_OP_NEW_POST) {
41 rinf->attributes = sk_X509_ATTRIBUTE_new_null();
42 if (!rinf->attributes)
48 static int req_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
51 X509_REQ *ret = (X509_REQ *)*pval;
55 ASN1_OCTET_STRING_free(ret->distinguishing_id);
57 case ASN1_OP_NEW_POST:
58 ret->distinguishing_id = NULL;
61 case ASN1_OP_FREE_POST:
62 ASN1_OCTET_STRING_free(ret->distinguishing_id);
63 OPENSSL_free(ret->propq);
65 case ASN1_OP_DUP_POST:
67 X509_REQ *old = exarg;
69 if (!ossl_x509_req_set0_libctx(ret, old->libctx, old->propq))
71 if (old->req_info.pubkey != NULL) {
72 EVP_PKEY *pkey = X509_PUBKEY_get0(old->req_info.pubkey);
75 pkey = EVP_PKEY_dup(pkey);
77 ERR_raise(ERR_LIB_X509, ERR_R_EVP_LIB);
80 if (!X509_PUBKEY_set(&ret->req_info.pubkey, pkey)) {
82 ERR_raise(ERR_LIB_X509, ERR_R_INTERNAL_ERROR);
90 case ASN1_OP_GET0_LIBCTX:
92 OSSL_LIB_CTX **libctx = exarg;
94 *libctx = ret->libctx;
97 case ASN1_OP_GET0_PROPQ:
99 const char **propq = exarg;
109 ASN1_SEQUENCE_enc(X509_REQ_INFO, enc, rinf_cb) = {
110 ASN1_SIMPLE(X509_REQ_INFO, version, ASN1_INTEGER),
111 ASN1_SIMPLE(X509_REQ_INFO, subject, X509_NAME),
112 ASN1_SIMPLE(X509_REQ_INFO, pubkey, X509_PUBKEY),
113 /* This isn't really OPTIONAL but it gets round invalid
116 ASN1_IMP_SET_OF_OPT(X509_REQ_INFO, attributes, X509_ATTRIBUTE, 0)
117 } ASN1_SEQUENCE_END_enc(X509_REQ_INFO, X509_REQ_INFO)
119 IMPLEMENT_ASN1_FUNCTIONS(X509_REQ_INFO)
121 ASN1_SEQUENCE_ref(X509_REQ, req_cb) = {
122 ASN1_EMBED(X509_REQ, req_info, X509_REQ_INFO),
123 ASN1_EMBED(X509_REQ, sig_alg, X509_ALGOR),
124 ASN1_SIMPLE(X509_REQ, signature, ASN1_BIT_STRING)
125 } ASN1_SEQUENCE_END_ref(X509_REQ, X509_REQ)
127 IMPLEMENT_ASN1_FUNCTIONS(X509_REQ)
129 IMPLEMENT_ASN1_DUP_FUNCTION(X509_REQ)
131 void X509_REQ_set0_distinguishing_id(X509_REQ *x, ASN1_OCTET_STRING *d_id)
133 ASN1_OCTET_STRING_free(x->distinguishing_id);
134 x->distinguishing_id = d_id;
137 ASN1_OCTET_STRING *X509_REQ_get0_distinguishing_id(X509_REQ *x)
139 return x->distinguishing_id;
143 * This should only be used if the X509_REQ object was embedded inside another
144 * asn1 object and it needs a libctx to operate.
145 * Use X509_REQ_new_ex() instead if possible.
147 int ossl_x509_req_set0_libctx(X509_REQ *x, OSSL_LIB_CTX *libctx,
152 OPENSSL_free(x->propq);
155 x->propq = OPENSSL_strdup(propq);
156 if (x->propq == NULL)
163 X509_REQ *X509_REQ_new_ex(OSSL_LIB_CTX *libctx, const char *propq)
165 X509_REQ *req = NULL;
167 req = (X509_REQ *)ASN1_item_new((X509_REQ_it()));
168 if (!ossl_x509_req_set0_libctx(req, libctx, propq)) {