1 /* 2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (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 8 */ 9 10 #include <stdio.h> 11 #include "internal/cryptlib.h" 12 #include <openssl/asn1t.h> 13 #include <openssl/x509.h> 14 #include "crypto/x509.h" 15 16 /*- 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. 23 * 24 * This means that the field will be correctly encoded unless 25 * we NULL out the field. 26 * 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. 32 * 33 */ 34 35 static int rinf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, 36 void *exarg) 37 { 38 X509_REQ_INFO *rinf = (X509_REQ_INFO *)*pval; 39 40 if (operation == ASN1_OP_NEW_POST) { 41 rinf->attributes = sk_X509_ATTRIBUTE_new_null(); 42 if (!rinf->attributes) 43 return 0; 44 } 45 return 1; 46 } 47 48 ASN1_SEQUENCE_enc(X509_REQ_INFO, enc, rinf_cb) = { 49 ASN1_SIMPLE(X509_REQ_INFO, version, ASN1_INTEGER), 50 ASN1_SIMPLE(X509_REQ_INFO, subject, X509_NAME), 51 ASN1_SIMPLE(X509_REQ_INFO, pubkey, X509_PUBKEY), 52 /* This isn't really OPTIONAL but it gets round invalid 53 * encodings 54 */ 55 ASN1_IMP_SET_OF_OPT(X509_REQ_INFO, attributes, X509_ATTRIBUTE, 0) 56 } ASN1_SEQUENCE_END_enc(X509_REQ_INFO, X509_REQ_INFO) 57 58 IMPLEMENT_ASN1_FUNCTIONS(X509_REQ_INFO) 59 60 ASN1_SEQUENCE_ref(X509_REQ, 0) = { 61 ASN1_EMBED(X509_REQ, req_info, X509_REQ_INFO), 62 ASN1_EMBED(X509_REQ, sig_alg, X509_ALGOR), 63 ASN1_SIMPLE(X509_REQ, signature, ASN1_BIT_STRING) 64 } ASN1_SEQUENCE_END_ref(X509_REQ, X509_REQ) 65 66 IMPLEMENT_ASN1_FUNCTIONS(X509_REQ) 67 68 IMPLEMENT_ASN1_DUP_FUNCTION(X509_REQ) 69