[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/asn1t.h>
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| 13 | #include <openssl/x509.h>
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| 14 | #include "internal/x509_int.h"
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| 15 |
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| 16 | /*-
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| 17 | * X509_REQ_INFO is handled in an unusual way to get round
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| 18 | * invalid encodings. Some broken certificate requests don't
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| 19 | * encode the attributes field if it is empty. This is in
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| 20 | * violation of PKCS#10 but we need to tolerate it. We do
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| 21 | * this by making the attributes field OPTIONAL then using
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| 22 | * the callback to initialise it to an empty STACK.
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| 23 | *
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| 24 | * This means that the field will be correctly encoded unless
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| 25 | * we NULL out the field.
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| 26 | *
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| 27 | * As a result we no longer need the req_kludge field because
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| 28 | * the information is now contained in the attributes field:
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| 29 | * 1. If it is NULL then it's the invalid omission.
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| 30 | * 2. If it is empty it is the correct encoding.
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| 31 | * 3. If it is not empty then some attributes are present.
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| 32 | *
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| 33 | */
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| 34 |
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| 35 | static int rinf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
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| 36 | void *exarg)
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| 37 | {
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| 38 | X509_REQ_INFO *rinf = (X509_REQ_INFO *)*pval;
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| 39 |
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| 40 | if (operation == ASN1_OP_NEW_POST) {
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| 41 | rinf->attributes = sk_X509_ATTRIBUTE_new_null();
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| 42 | if (!rinf->attributes)
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| 43 | return 0;
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| 44 | }
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| 45 | return 1;
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| 46 | }
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| 47 |
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| 48 | ASN1_SEQUENCE_enc(X509_REQ_INFO, enc, rinf_cb) = {
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| 49 | ASN1_SIMPLE(X509_REQ_INFO, version, ASN1_INTEGER),
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| 50 | ASN1_SIMPLE(X509_REQ_INFO, subject, X509_NAME),
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| 51 | ASN1_SIMPLE(X509_REQ_INFO, pubkey, X509_PUBKEY),
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| 52 | /* This isn't really OPTIONAL but it gets round invalid
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| 53 | * encodings
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| 54 | */
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| 55 | ASN1_IMP_SET_OF_OPT(X509_REQ_INFO, attributes, X509_ATTRIBUTE, 0)
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| 56 | } ASN1_SEQUENCE_END_enc(X509_REQ_INFO, X509_REQ_INFO)
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| 57 |
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| 58 | IMPLEMENT_ASN1_FUNCTIONS(X509_REQ_INFO)
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| 59 |
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| 60 | ASN1_SEQUENCE_ref(X509_REQ, 0) = {
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| 61 | ASN1_EMBED(X509_REQ, req_info, X509_REQ_INFO),
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| 62 | ASN1_EMBED(X509_REQ, sig_alg, X509_ALGOR),
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| 63 | ASN1_SIMPLE(X509_REQ, signature, ASN1_BIT_STRING)
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| 64 | } ASN1_SEQUENCE_END_ref(X509_REQ, X509_REQ)
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| 65 |
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| 66 | IMPLEMENT_ASN1_FUNCTIONS(X509_REQ)
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| 67 |
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| 68 | IMPLEMENT_ASN1_DUP_FUNCTION(X509_REQ)
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