crypto/asn1/x_req.c

   1 /* crypto/asn1/x_req.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/asn1t.h>
  62 #include <openssl/x509.h>
  63
  64 /*-
  65  * X509_REQ_INFO is handled in an unusual way to get round
  66  * invalid encodings. Some broken certificate requests don't
  67  * encode the attributes field if it is empty. This is in
  68  * violation of PKCS#10 but we need to tolerate it. We do
  69  * this by making the attributes field OPTIONAL then using
  70  * the callback to initialise it to an empty STACK.
  71  *
  72  * This means that the field will be correctly encoded unless
  73  * we NULL out the field.
  74  *
  75  * As a result we no longer need the req_kludge field because
  76  * the information is now contained in the attributes field:
  77  * 1. If it is NULL then it's the invalid omission.
  78  * 2. If it is empty it is the correct encoding.
  79  * 3. If it is not empty then some attributes are present.
  80  *
  81  */
  82
  83 static int rinf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  84                    void *exarg)
  85 {
  86     X509_REQ_INFO *rinf = (X509_REQ_INFO *)*pval;
  87
  88     if (operation == ASN1_OP_NEW_POST) {
  89         rinf->attributes = sk_X509_ATTRIBUTE_new_null();
  90         if (!rinf->attributes)
  91             return 0;
  92     }
  93     return 1;
  94 }
  95
  96 ASN1_SEQUENCE_enc(X509_REQ_INFO, enc, rinf_cb) = {
  97         ASN1_SIMPLE(X509_REQ_INFO, version, ASN1_INTEGER),
  98         ASN1_SIMPLE(X509_REQ_INFO, subject, X509_NAME),
  99         ASN1_SIMPLE(X509_REQ_INFO, pubkey, X509_PUBKEY),
 100         /* This isn't really OPTIONAL but it gets round invalid
 101          * encodings
 102          */
 103         ASN1_IMP_SET_OF_OPT(X509_REQ_INFO, attributes, X509_ATTRIBUTE, 0)
 104 } ASN1_SEQUENCE_END_enc(X509_REQ_INFO, X509_REQ_INFO)
 105
 106 IMPLEMENT_ASN1_FUNCTIONS(X509_REQ_INFO)
 107
 108 ASN1_SEQUENCE_ref(X509_REQ, 0, CRYPTO_LOCK_X509_REQ) = {
 109         ASN1_SIMPLE(X509_REQ, req_info, X509_REQ_INFO),
 110         ASN1_SIMPLE(X509_REQ, sig_alg, X509_ALGOR),
 111         ASN1_SIMPLE(X509_REQ, signature, ASN1_BIT_STRING)
 112 } ASN1_SEQUENCE_END_ref(X509_REQ, X509_REQ)
 113
 114 IMPLEMENT_ASN1_FUNCTIONS(X509_REQ)
 115
 116 IMPLEMENT_ASN1_DUP_FUNCTION(X509_REQ)