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/* $OpenBSD: x_req.c,v 1.17 2018/02/22 16:50:30 jsing Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdio.h>
#include <openssl/asn1t.h>
#include <openssl/x509.h>
/* X509_REQ_INFO is handled in an unusual way to get round
* invalid encodings. Some broken certificate requests don't
* encode the attributes field if it is empty. This is in
* violation of PKCS#10 but we need to tolerate it. We do
* this by making the attributes field OPTIONAL then using
* the callback to initialise it to an empty STACK.
*
* This means that the field will be correctly encoded unless
* we NULL out the field.
*
* As a result we no longer need the req_kludge field because
* the information is now contained in the attributes field:
* 1. If it is NULL then it's the invalid omission.
* 2. If it is empty it is the correct encoding.
* 3. If it is not empty then some attributes are present.
*
*/
static int
rinf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
{
X509_REQ_INFO *rinf = (X509_REQ_INFO *)*pval;
if (operation == ASN1_OP_NEW_POST) {
rinf->attributes = sk_X509_ATTRIBUTE_new_null();
if (!rinf->attributes)
return 0;
}
return 1;
}
static const ASN1_AUX X509_REQ_INFO_aux = {
.flags = ASN1_AFLG_ENCODING,
.asn1_cb = rinf_cb,
.enc_offset = offsetof(X509_REQ_INFO, enc),
};
static const ASN1_TEMPLATE X509_REQ_INFO_seq_tt[] = {
{
.offset = offsetof(X509_REQ_INFO, version),
.field_name = "version",
.item = &ASN1_INTEGER_it,
},
{
.offset = offsetof(X509_REQ_INFO, subject),
.field_name = "subject",
.item = &X509_NAME_it,
},
{
.offset = offsetof(X509_REQ_INFO, pubkey),
.field_name = "pubkey",
.item = &X509_PUBKEY_it,
},
/* This isn't really OPTIONAL but it gets round invalid
* encodings
*/
{
.flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_SET_OF | ASN1_TFLG_OPTIONAL,
.offset = offsetof(X509_REQ_INFO, attributes),
.field_name = "attributes",
.item = &X509_ATTRIBUTE_it,
},
};
const ASN1_ITEM X509_REQ_INFO_it = {
.itype = ASN1_ITYPE_SEQUENCE,
.utype = V_ASN1_SEQUENCE,
.templates = X509_REQ_INFO_seq_tt,
.tcount = sizeof(X509_REQ_INFO_seq_tt) / sizeof(ASN1_TEMPLATE),
.funcs = &X509_REQ_INFO_aux,
.size = sizeof(X509_REQ_INFO),
.sname = "X509_REQ_INFO",
};
X509_REQ_INFO *
d2i_X509_REQ_INFO(X509_REQ_INFO **a, const unsigned char **in, long len)
{
return (X509_REQ_INFO *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
&X509_REQ_INFO_it);
}
int
i2d_X509_REQ_INFO(X509_REQ_INFO *a, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_REQ_INFO_it);
}
X509_REQ_INFO *
X509_REQ_INFO_new(void)
{
return (X509_REQ_INFO *)ASN1_item_new(&X509_REQ_INFO_it);
}
void
X509_REQ_INFO_free(X509_REQ_INFO *a)
{
ASN1_item_free((ASN1_VALUE *)a, &X509_REQ_INFO_it);
}
static const ASN1_AUX X509_REQ_aux = {
.app_data = NULL,
.flags = ASN1_AFLG_REFCOUNT,
.ref_offset = offsetof(X509_REQ, references),
.ref_lock = CRYPTO_LOCK_X509_REQ,
};
static const ASN1_TEMPLATE X509_REQ_seq_tt[] = {
{
.offset = offsetof(X509_REQ, req_info),
.field_name = "req_info",
.item = &X509_REQ_INFO_it,
},
{
.offset = offsetof(X509_REQ, sig_alg),
.field_name = "sig_alg",
.item = &X509_ALGOR_it,
},
{
.offset = offsetof(X509_REQ, signature),
.field_name = "signature",
.item = &ASN1_BIT_STRING_it,
},
};
const ASN1_ITEM X509_REQ_it = {
.itype = ASN1_ITYPE_SEQUENCE,
.utype = V_ASN1_SEQUENCE,
.templates = X509_REQ_seq_tt,
.tcount = sizeof(X509_REQ_seq_tt) / sizeof(ASN1_TEMPLATE),
.funcs = &X509_REQ_aux,
.size = sizeof(X509_REQ),
.sname = "X509_REQ",
};
X509_REQ *
d2i_X509_REQ(X509_REQ **a, const unsigned char **in, long len)
{
return (X509_REQ *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
&X509_REQ_it);
}
int
i2d_X509_REQ(X509_REQ *a, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_REQ_it);
}
X509_REQ *
X509_REQ_new(void)
{
return (X509_REQ *)ASN1_item_new(&X509_REQ_it);
}
void
X509_REQ_free(X509_REQ *a)
{
ASN1_item_free((ASN1_VALUE *)a, &X509_REQ_it);
}
X509_REQ *
X509_REQ_dup(X509_REQ *x)
{
return ASN1_item_dup(&X509_REQ_it, x);
}
int
X509_REQ_get_signature_nid(const X509_REQ *req)
{
return OBJ_obj2nid(req->sig_alg->algorithm);
}
void
X509_REQ_get0_signature(const X509_REQ *req, const ASN1_BIT_STRING **psig,
const X509_ALGOR **palg)
{
if (psig != NULL)
*psig = req->signature;
if (palg != NULL)
*palg = req->sig_alg;
}
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