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/*
* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/x509.h>
#include "crypto/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 int req_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
void *exarg)
{
X509_REQ *ret = (X509_REQ *)*pval;
switch (operation) {
case ASN1_OP_D2I_PRE:
ASN1_OCTET_STRING_free(ret->distinguishing_id);
/* fall through */
case ASN1_OP_NEW_POST:
ret->distinguishing_id = NULL;
break;
case ASN1_OP_FREE_POST:
ASN1_OCTET_STRING_free(ret->distinguishing_id);
OPENSSL_free(ret->propq);
break;
case ASN1_OP_DUP_POST:
{
X509_REQ *old = exarg;
if (!ossl_x509_req_set0_libctx(ret, old->libctx, old->propq))
return 0;
if (old->req_info.pubkey != NULL) {
EVP_PKEY *pkey = X509_PUBKEY_get0(old->req_info.pubkey);
if (pkey != NULL) {
pkey = EVP_PKEY_dup(pkey);
if (pkey == NULL) {
ERR_raise(ERR_LIB_X509, ERR_R_EVP_LIB);
return 0;
}
if (!X509_PUBKEY_set(&ret->req_info.pubkey, pkey)) {
EVP_PKEY_free(pkey);
ERR_raise(ERR_LIB_X509, ERR_R_INTERNAL_ERROR);
return 0;
}
EVP_PKEY_free(pkey);
}
}
}
break;
case ASN1_OP_GET0_LIBCTX:
{
OSSL_LIB_CTX **libctx = exarg;
*libctx = ret->libctx;
}
break;
case ASN1_OP_GET0_PROPQ:
{
const char **propq = exarg;
*propq = ret->propq;
}
break;
}
return 1;
}
ASN1_SEQUENCE_enc(X509_REQ_INFO, enc, rinf_cb) = {
ASN1_SIMPLE(X509_REQ_INFO, version, ASN1_INTEGER),
ASN1_SIMPLE(X509_REQ_INFO, subject, X509_NAME),
ASN1_SIMPLE(X509_REQ_INFO, pubkey, X509_PUBKEY),
/* This isn't really OPTIONAL but it gets round invalid
* encodings
*/
ASN1_IMP_SET_OF_OPT(X509_REQ_INFO, attributes, X509_ATTRIBUTE, 0)
} ASN1_SEQUENCE_END_enc(X509_REQ_INFO, X509_REQ_INFO)
IMPLEMENT_ASN1_FUNCTIONS(X509_REQ_INFO)
ASN1_SEQUENCE_ref(X509_REQ, req_cb) = {
ASN1_EMBED(X509_REQ, req_info, X509_REQ_INFO),
ASN1_EMBED(X509_REQ, sig_alg, X509_ALGOR),
ASN1_SIMPLE(X509_REQ, signature, ASN1_BIT_STRING)
} ASN1_SEQUENCE_END_ref(X509_REQ, X509_REQ)
IMPLEMENT_ASN1_FUNCTIONS(X509_REQ)
IMPLEMENT_ASN1_DUP_FUNCTION(X509_REQ)
void X509_REQ_set0_distinguishing_id(X509_REQ *x, ASN1_OCTET_STRING *d_id)
{
ASN1_OCTET_STRING_free(x->distinguishing_id);
x->distinguishing_id = d_id;
}
ASN1_OCTET_STRING *X509_REQ_get0_distinguishing_id(X509_REQ *x)
{
return x->distinguishing_id;
}
/*
* This should only be used if the X509_REQ object was embedded inside another
* asn1 object and it needs a libctx to operate.
* Use X509_REQ_new_ex() instead if possible.
*/
int ossl_x509_req_set0_libctx(X509_REQ *x, OSSL_LIB_CTX *libctx,
const char *propq)
{
if (x != NULL) {
x->libctx = libctx;
OPENSSL_free(x->propq);
x->propq = NULL;
if (propq != NULL) {
x->propq = OPENSSL_strdup(propq);
if (x->propq == NULL)
return 0;
}
}
return 1;
}
X509_REQ *X509_REQ_new_ex(OSSL_LIB_CTX *libctx, const char *propq)
{
X509_REQ *req = NULL;
req = (X509_REQ *)ASN1_item_new((X509_REQ_it()));
if (!ossl_x509_req_set0_libctx(req, libctx, propq)) {
X509_REQ_free(req);
req = NULL;
}
return req;
}
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