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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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