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source: vbox/trunk/src/VBox/Runtime/common/crypto/pkcs7-sanity.cpp@ 78018

Last change on this file since 78018 was 76553, checked in by vboxsync, 6 years ago

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1/* $Id: pkcs7-sanity.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
2/** @file
3 * IPRT - Crypto - PKCS \#7, Sanity Checkers.
4 */
5
6/*
7 * Copyright (C) 2006-2019 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27
28/*********************************************************************************************************************************
29* Header Files *
30*********************************************************************************************************************************/
31#include "internal/iprt.h"
32#include <iprt/crypto/pkcs7.h>
33
34#include <iprt/err.h>
35#include <iprt/string.h>
36
37//#include <iprt/stream.h>
38
39#include "pkcs7-internal.h"
40
41
42static int rtCrPkcs7SignedData_CheckSanityExtra(PCRTCRPKCS7SIGNEDDATA pSignedData, uint32_t fFlags,
43 PRTERRINFO pErrInfo, const char *pszErrorTag)
44{
45 bool const fAuthenticode = RT_BOOL(fFlags & RTCRPKCS7SIGNEDDATA_SANITY_F_AUTHENTICODE);
46 RT_NOREF_PV(fFlags);
47
48 //RTAsn1Dump(&pSignedData->SeqCore.Asn1Core, 0, 0, RTAsn1DumpStrmPrintfV, g_pStdOut);
49
50 if ( RTAsn1Integer_UnsignedCompareWithU32(&pSignedData->Version, RTCRPKCS7SIGNEDDATA_V1) != 0
51 && RTAsn1Integer_UnsignedCompareWithU32(&pSignedData->Version, RTCRPKCS7SIGNEDDATA_V3) != 0
52 && RTAsn1Integer_UnsignedCompareWithU32(&pSignedData->Version, RTCRPKCS7SIGNEDDATA_V4) != 0
53 && RTAsn1Integer_UnsignedCompareWithU32(&pSignedData->Version, RTCRPKCS7SIGNEDDATA_V5) != 0)
54 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNED_DATA_VERSION, "SignedData version is %llu, expected %u",
55 pSignedData->Version.uValue.u, RTCRPKCS7SIGNEDDATA_V1);
56
57 /*
58 * DigestAlgorithms.
59 */
60 if (pSignedData->DigestAlgorithms.cItems == 0) /** @todo this might be too strict */
61 return RTErrInfoSet(pErrInfo, VERR_CR_PKCS7_SIGNED_DATA_NO_DIGEST_ALGOS, "SignedData.DigestAlgorithms is empty");
62 if (pSignedData->DigestAlgorithms.cItems != 1 && fAuthenticode)
63 return RTErrInfoSetF(pErrInfo, VERR_CR_SPC_NOT_EXACTLY_ONE_DIGEST_ALGO,
64 "%s: SignedData.DigestAlgorithms has more than one algorithm (%u)",
65 pszErrorTag, pSignedData->DigestAlgorithms.cItems);
66
67 if (fFlags & RTCRPKCS7SIGNEDDATA_SANITY_F_ONLY_KNOWN_HASH)
68 for (uint32_t i = 0; i < pSignedData->DigestAlgorithms.cItems; i++)
69 {
70 if (RTCrX509AlgorithmIdentifier_QueryDigestType(pSignedData->DigestAlgorithms.papItems[i]) == RTDIGESTTYPE_INVALID)
71 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_UNKNOWN_DIGEST_ALGORITHM,
72 "%s: SignedData.DigestAlgorithms[%i] is not known: %s",
73 pszErrorTag, i, pSignedData->DigestAlgorithms.papItems[i]->Algorithm.szObjId);
74 if (pSignedData->DigestAlgorithms.papItems[i]->Parameters.enmType != RTASN1TYPE_NULL)
75 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_DIGEST_PARAMS_NOT_IMPL,
76 "%s: SignedData.DigestAlgorithms[%i] has parameters: tag=%u",
77 pszErrorTag, i, pSignedData->DigestAlgorithms.papItems[i]->Parameters.u.Core.uTag);
78 }
79
80 /*
81 * Certificates.
82 */
83 if ( (fFlags & RTCRPKCS7SIGNEDDATA_SANITY_F_SIGNING_CERT_PRESENT)
84 && pSignedData->Certificates.cItems == 0)
85 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_NO_CERTIFICATES,
86 "%s: SignedData.Certifcates is empty, expected at least one certificate", pszErrorTag);
87
88 /*
89 * Crls.
90 */
91 if (fAuthenticode && RTAsn1Core_IsPresent(&pSignedData->Crls))
92 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_EXPECTED_NO_CRLS,
93 "%s: SignedData.Crls is not empty as expected for authenticode.", pszErrorTag);
94 /** @todo check Crls when they become important. */
95
96 /*
97 * SignerInfos.
98 */
99 if (pSignedData->SignerInfos.cItems == 0)
100 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_NO_SIGNER_INFOS, "%s: SignedData.SignerInfos is empty?", pszErrorTag);
101 if (fAuthenticode && pSignedData->SignerInfos.cItems != 1)
102 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_EXPECTED_ONE_SIGNER_INFO,
103 "%s: SignedData.SignerInfos should have one entry for authenticode: %u",
104 pszErrorTag, pSignedData->SignerInfos.cItems);
105
106 for (uint32_t i = 0; i < pSignedData->SignerInfos.cItems; i++)
107 {
108 PCRTCRPKCS7SIGNERINFO pSignerInfo = pSignedData->SignerInfos.papItems[i];
109
110 if (RTAsn1Integer_UnsignedCompareWithU32(&pSignerInfo->Version, RTCRPKCS7SIGNERINFO_V1) != 0)
111 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNER_INFO_VERSION,
112 "%s: SignedData.SignerInfos[%u] version is %llu, expected %u",
113 pszErrorTag, i, pSignerInfo->Version.uValue.u, RTCRPKCS7SIGNERINFO_V1);
114
115 /* IssuerAndSerialNumber. */
116 int rc = RTCrX509Name_CheckSanity(&pSignerInfo->IssuerAndSerialNumber.Name, 0, pErrInfo,
117 "SignedData.SignerInfos[#].IssuerAndSerialNumber.Name");
118 if (RT_FAILURE(rc))
119 return rc;
120
121 if (pSignerInfo->IssuerAndSerialNumber.SerialNumber.Asn1Core.cb == 0)
122 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNER_INFO_NO_ISSUER_SERIAL_NO,
123 "%s: SignedData.SignerInfos[%u].IssuerAndSerialNumber.SerialNumber is missing (zero length)",
124 pszErrorTag, i);
125
126 PCRTCRX509CERTIFICATE pCert;
127 pCert = RTCrPkcs7SetOfCerts_FindX509ByIssuerAndSerialNumber(&pSignedData->Certificates,
128 &pSignerInfo->IssuerAndSerialNumber.Name,
129 &pSignerInfo->IssuerAndSerialNumber.SerialNumber);
130 if (!pCert && (fFlags & RTCRPKCS7SIGNEDDATA_SANITY_F_SIGNING_CERT_PRESENT))
131 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNER_CERT_NOT_SHIPPED,
132 "%s: SignedData.SignerInfos[%u].IssuerAndSerialNumber not found in T0.Certificates",
133 pszErrorTag, i);
134
135 /* DigestAlgorithm */
136 uint32_t j = 0;
137 while ( j < pSignedData->DigestAlgorithms.cItems
138 && RTCrX509AlgorithmIdentifier_Compare(pSignedData->DigestAlgorithms.papItems[j],
139 &pSignerInfo->DigestAlgorithm) != 0)
140 j++;
141 if (j >= pSignedData->DigestAlgorithms.cItems)
142 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_DIGEST_ALGO_NOT_FOUND_IN_LIST,
143 "%s: SignedData.SignerInfos[%u].DigestAlgorithm (%s) not found in SignedData.DigestAlgorithms",
144 pszErrorTag, i, pSignerInfo->DigestAlgorithm.Algorithm.szObjId);
145
146 /* Digest encryption algorithm. */
147#if 0 /** @todo Unimportant: Seen timestamp signatures specifying pkcs1-Sha256WithRsaEncryption in SignerInfo and just RSA in the certificate. Figure out how to compare the two. */
148 if ( pCert
149 && RTCrX509AlgorithmIdentifier_Compare(&pSignerInfo->DigestEncryptionAlgorithm,
150 &pCert->TbsCertificate.SubjectPublicKeyInfo.Algorithm) != 0)
151 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_SIGNER_INFO_DIGEST_ENCRYPT_MISMATCH,
152 "SignedData.SignerInfos[%u].DigestEncryptionAlgorithm (%s) mismatch with certificate (%s)",
153 i, pSignerInfo->DigestEncryptionAlgorithm.Algorithm.szObjId,
154 pCert->TbsCertificate.SubjectPublicKeyInfo.Algorithm.Algorithm.szObjId);
155#endif
156
157 /* Authenticated attributes we know. */
158 if (RTCrPkcs7Attributes_IsPresent(&pSignerInfo->AuthenticatedAttributes))
159 {
160 bool fFoundContentInfo = false;
161 bool fFoundMessageDigest = false;
162 for (j = 0; j < pSignerInfo->AuthenticatedAttributes.cItems; j++)
163 {
164 PCRTCRPKCS7ATTRIBUTE pAttrib = pSignerInfo->AuthenticatedAttributes.papItems[j];
165 if (RTAsn1ObjId_CompareWithString(&pAttrib->Type, RTCR_PKCS9_ID_CONTENT_TYPE_OID) == 0)
166 {
167 if (fFoundContentInfo)
168 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_MISSING_CONTENT_TYPE_ATTRIB,
169 "%s: Multiple authenticated content-type attributes.", pszErrorTag);
170 fFoundContentInfo = true;
171 AssertReturn(pAttrib->enmType == RTCRPKCS7ATTRIBUTETYPE_OBJ_IDS, VERR_INTERNAL_ERROR_3);
172 if (pAttrib->uValues.pObjIds->cItems != 1)
173 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_BAD_CONTENT_TYPE_ATTRIB,
174 "%s: Expected exactly one value for content-type attrib, found: %u",
175 pszErrorTag, pAttrib->uValues.pObjIds->cItems);
176 }
177 else if (RTAsn1ObjId_CompareWithString(&pAttrib->Type, RTCR_PKCS9_ID_MESSAGE_DIGEST_OID) == 0)
178 {
179 if (fFoundMessageDigest)
180 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_MISSING_MESSAGE_DIGEST_ATTRIB,
181 "%s: Multiple authenticated message-digest attributes.", pszErrorTag);
182 fFoundMessageDigest = true;
183 AssertReturn(pAttrib->enmType == RTCRPKCS7ATTRIBUTETYPE_OCTET_STRINGS, VERR_INTERNAL_ERROR_3);
184 if (pAttrib->uValues.pOctetStrings->cItems != 1)
185 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_BAD_CONTENT_TYPE_ATTRIB,
186 "%s: Expected exactly one value for message-digest attrib, found: %u",
187 pszErrorTag, pAttrib->uValues.pOctetStrings->cItems);
188 }
189 }
190
191 if (!fFoundContentInfo)
192 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_MISSING_CONTENT_TYPE_ATTRIB,
193 "%s: Missing authenticated content-type attribute.", pszErrorTag);
194 if (!fFoundMessageDigest)
195 return RTErrInfoSetF(pErrInfo, VERR_CR_PKCS7_MISSING_MESSAGE_DIGEST_ATTRIB,
196 "%s: Missing authenticated message-digest attribute.", pszErrorTag);
197 }
198 }
199
200 return VINF_SUCCESS;
201}
202
203
204/*
205 * Generate the code.
206 */
207#include <iprt/asn1-generator-sanity.h>
208
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