1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
|
/* $Id: pkix-verify.cpp $ */
/** @file
* IPRT - Crypto - Public Key Infrastructure API, Verification.
*/
/*
* Copyright (C) 2006-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/iprt.h"
#include <iprt/crypto/pkix.h>
#include <iprt/err.h>
#include <iprt/string.h>
#include <iprt/crypto/digest.h>
#include <iprt/crypto/key.h>
#ifdef IPRT_WITH_OPENSSL
# include "internal/iprt-openssl.h"
# include "openssl/evp.h"
# ifndef OPENSSL_VERSION_NUMBER
# error "Missing OPENSSL_VERSION_NUMBER!"
# endif
#endif
RTDECL(int) RTCrPkixPubKeyVerifySignature(PCRTASN1OBJID pAlgorithm, RTCRKEY hPublicKey, PCRTASN1DYNTYPE pParameters,
PCRTASN1BITSTRING pSignatureValue, const void *pvData, size_t cbData,
PRTERRINFO pErrInfo)
{
/*
* Valid input.
*/
AssertPtrReturn(pAlgorithm, VERR_INVALID_POINTER);
AssertReturn(RTAsn1ObjId_IsPresent(pAlgorithm), VERR_INVALID_POINTER);
if (pParameters)
{
AssertPtrReturn(pParameters, VERR_INVALID_POINTER);
if (pParameters->enmType == RTASN1TYPE_NULL)
pParameters = NULL;
}
AssertPtrReturn(hPublicKey, VERR_INVALID_POINTER);
Assert(RTCrKeyHasPublicPart(hPublicKey));
AssertPtrReturn(pSignatureValue, VERR_INVALID_POINTER);
AssertReturn(RTAsn1BitString_IsPresent(pSignatureValue), VERR_INVALID_POINTER);
AssertPtrReturn(pvData, VERR_INVALID_POINTER);
AssertReturn(cbData > 0, VERR_INVALID_PARAMETER);
/*
* Parameters are not currently supported (openssl code path).
*/
if (pParameters)
return RTErrInfoSet(pErrInfo, VERR_CR_PKIX_CIPHER_ALGO_PARAMS_NOT_IMPL,
"Cipher algorithm parameters are not yet supported.");
/*
* Validate using IPRT.
*/
RTCRPKIXSIGNATURE hSignature;
int rcIprt = RTCrPkixSignatureCreateByObjId(&hSignature, pAlgorithm, hPublicKey, pParameters, false /*fSigning*/);
if (RT_FAILURE(rcIprt))
return RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_CIPHER_ALGO_NOT_KNOWN,
"Unknown public key algorithm [IPRT]: %s", pAlgorithm->szObjId);
RTCRDIGEST hDigest;
rcIprt = RTCrDigestCreateByObjId(&hDigest, pAlgorithm);
if (RT_SUCCESS(rcIprt))
{
/* Calculate the digest. */
rcIprt = RTCrDigestUpdate(hDigest, pvData, cbData);
if (RT_SUCCESS(rcIprt))
{
rcIprt = RTCrPkixSignatureVerifyBitString(hSignature, hDigest, pSignatureValue);
if (RT_FAILURE(rcIprt))
RTErrInfoSet(pErrInfo, rcIprt, "RTCrPkixSignatureVerifyBitString failed");
}
else
RTErrInfoSet(pErrInfo, rcIprt, "RTCrDigestUpdate failed");
RTCrDigestRelease(hDigest);
}
else
RTErrInfoSetF(pErrInfo, rcIprt, "Unknown digest algorithm [IPRT]: %s", pAlgorithm->szObjId);
RTCrPkixSignatureRelease(hSignature);
#ifdef IPRT_WITH_OPENSSL
/*
* Validate using OpenSSL EVP.
*/
/* Create an EVP public key. */
EVP_PKEY *pEvpPublicKey = NULL;
const EVP_MD *pEvpMdType = NULL;
int rcOssl = rtCrKeyToOpenSslKey(hPublicKey, true /*fNeedPublic*/, pAlgorithm->szObjId,
(void **)&pEvpPublicKey, (const void **)&pEvpMdType, pErrInfo);
if (RT_SUCCESS(rcOssl))
{
EVP_MD_CTX *pEvpMdCtx = EVP_MD_CTX_create();
if (pEvpMdCtx)
{
if (EVP_VerifyInit_ex(pEvpMdCtx, pEvpMdType, NULL /*engine*/))
{
/* Digest the data. */
EVP_VerifyUpdate(pEvpMdCtx, pvData, cbData);
/* Verify the signature. */
if (EVP_VerifyFinal(pEvpMdCtx,
RTASN1BITSTRING_GET_BIT0_PTR(pSignatureValue),
RTASN1BITSTRING_GET_BYTE_SIZE(pSignatureValue),
pEvpPublicKey) > 0)
rcOssl = VINF_SUCCESS;
else
rcOssl = RTErrInfoSet(pErrInfo, VERR_CR_PKIX_OSSL_VERIFY_FINAL_FAILED, "EVP_VerifyFinal failed");
/* Cleanup and return: */
}
else
rcOssl = RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_CIPHER_ALOG_INIT_FAILED,
"EVP_VerifyInit_ex failed (algorithm type is %s)", pAlgorithm->szObjId);
EVP_MD_CTX_destroy(pEvpMdCtx);
}
else
rcOssl = RTErrInfoSetF(pErrInfo, VERR_NO_MEMORY, "EVP_MD_CTX_create failed");
EVP_PKEY_free(pEvpPublicKey);
}
/*
* Check the result.
*/
if ( (RT_SUCCESS(rcIprt) && RT_SUCCESS(rcOssl))
|| (RT_FAILURE_NP(rcIprt) && RT_FAILURE_NP(rcOssl))
|| (RT_SUCCESS(rcIprt) && rcOssl == VERR_CR_PKIX_OSSL_CIPHER_ALGO_NOT_KNOWN_EVP) )
return rcIprt;
AssertMsgFailed(("rcIprt=%Rrc rcOssl=%Rrc\n", rcIprt, rcOssl));
if (RT_FAILURE_NP(rcOssl))
return rcOssl;
#endif /* IPRT_WITH_OPENSSL */
return rcIprt;
}
RTDECL(int) RTCrPkixPubKeyVerifySignedDigest(PCRTASN1OBJID pAlgorithm, RTCRKEY hPublicKey, PCRTASN1DYNTYPE pParameters,
void const *pvSignedDigest, size_t cbSignedDigest, RTCRDIGEST hDigest,
PRTERRINFO pErrInfo)
{
/*
* Valid input.
*/
AssertPtrReturn(pAlgorithm, VERR_INVALID_POINTER);
AssertReturn(RTAsn1ObjId_IsPresent(pAlgorithm), VERR_INVALID_POINTER);
if (pParameters)
{
AssertPtrReturn(pParameters, VERR_INVALID_POINTER);
if (pParameters->enmType == RTASN1TYPE_NULL)
pParameters = NULL;
}
AssertPtrReturn(hPublicKey, VERR_INVALID_POINTER);
Assert(RTCrKeyHasPublicPart(hPublicKey));
AssertPtrReturn(pvSignedDigest, VERR_INVALID_POINTER);
AssertReturn(cbSignedDigest, VERR_INVALID_PARAMETER);
AssertPtrReturn(hDigest, VERR_INVALID_HANDLE);
/*
* Parameters are not currently supported (openssl code path).
*/
if (pParameters)
return RTErrInfoSet(pErrInfo, VERR_CR_PKIX_CIPHER_ALGO_PARAMS_NOT_IMPL,
"Cipher algorithm parameters are not yet supported.");
/*
* Validate using IPRT.
*/
RTCRPKIXSIGNATURE hSignature;
int rcIprt = RTCrPkixSignatureCreateByObjId(&hSignature, pAlgorithm, hPublicKey, pParameters, false /*fSigning*/);
if (RT_FAILURE(rcIprt))
return RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_CIPHER_ALGO_NOT_KNOWN,
"Unknown public key algorithm [IPRT]: %s", pAlgorithm->szObjId);
rcIprt = RTCrPkixSignatureVerify(hSignature, hDigest, pvSignedDigest, cbSignedDigest);
if (RT_FAILURE(rcIprt))
RTErrInfoSet(pErrInfo, rcIprt, "RTCrPkixSignatureVerifyBitString failed");
RTCrPkixSignatureRelease(hSignature);
#if defined(IPRT_WITH_OPENSSL) \
&& (OPENSSL_VERSION_NUMBER > 0x10000000L) /* 0.9.8 doesn't seem to have EVP_PKEY_CTX_set_signature_md. */
/*
* Validate using OpenSSL EVP.
*/
/* Combine encryption and digest if the algorithm doesn't specify the digest type. */
const char *pszAlgObjId = pAlgorithm->szObjId;
if (!strcmp(pszAlgObjId, RTCRX509ALGORITHMIDENTIFIERID_RSA))
{
pszAlgObjId = RTCrX509AlgorithmIdentifier_CombineEncryptionOidAndDigestOid(pszAlgObjId,
RTCrDigestGetAlgorithmOid(hDigest));
AssertMsgStmt(pszAlgObjId, ("enc=%s hash=%s\n", pAlgorithm->szObjId, RTCrDigestGetAlgorithmOid(hDigest)),
pszAlgObjId = RTCrDigestGetAlgorithmOid(hDigest));
}
/* Create an EVP public key. */
EVP_PKEY *pEvpPublicKey = NULL;
const EVP_MD *pEvpMdType = NULL;
int rcOssl = rtCrKeyToOpenSslKey(hPublicKey, true /*fNeedPublic*/, pszAlgObjId,
(void **)&pEvpPublicKey, (const void **)&pEvpMdType, pErrInfo);
if (RT_SUCCESS(rcOssl))
{
/* Create an EVP public key context we can use to validate the digest. */
EVP_PKEY_CTX *pEvpPKeyCtx = EVP_PKEY_CTX_new(pEvpPublicKey, NULL);
if (pEvpPKeyCtx)
{
rcOssl = EVP_PKEY_verify_init(pEvpPKeyCtx);
if (rcOssl > 0)
{
rcOssl = EVP_PKEY_CTX_set_signature_md(pEvpPKeyCtx, pEvpMdType);
if (rcOssl > 0)
{
/* Get the digest from hDigest and verify it. */
rcOssl = EVP_PKEY_verify(pEvpPKeyCtx,
(uint8_t const *)pvSignedDigest,
cbSignedDigest,
RTCrDigestGetHash(hDigest),
RTCrDigestGetHashSize(hDigest));
if (rcOssl > 0)
rcOssl = VINF_SUCCESS;
else
rcOssl = RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_VERIFY_FINAL_FAILED,
"EVP_PKEY_verify failed (%d)", rcOssl);
/* Cleanup and return: */
}
else
rcOssl = RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_EVP_PKEY_TYPE_ERROR,
"EVP_PKEY_CTX_set_signature_md failed (%d)", rcOssl);
}
else
rcOssl = RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_EVP_PKEY_TYPE_ERROR,
"EVP_PKEY_verify_init failed (%d)", rcOssl);
EVP_PKEY_CTX_free(pEvpPKeyCtx);
}
else
rcOssl = RTErrInfoSet(pErrInfo, VERR_CR_PKIX_OSSL_EVP_PKEY_TYPE_ERROR, "EVP_PKEY_CTX_new failed");
EVP_PKEY_free(pEvpPublicKey);
}
/*
* Check the result.
*/
if ( (RT_SUCCESS(rcIprt) && RT_SUCCESS(rcOssl))
|| (RT_FAILURE_NP(rcIprt) && RT_FAILURE_NP(rcOssl))
|| (RT_SUCCESS(rcIprt) && rcOssl == VERR_CR_PKIX_OSSL_CIPHER_ALGO_NOT_KNOWN_EVP) )
return rcIprt;
AssertMsgFailed(("rcIprt=%Rrc rcOssl=%Rrc\n", rcIprt, rcOssl));
if (RT_FAILURE_NP(rcOssl))
return rcOssl;
#endif /* IPRT_WITH_OPENSSL */
return rcIprt;
}
RTDECL(int) RTCrPkixPubKeyVerifySignedDigestByCertPubKeyInfo(PCRTCRX509SUBJECTPUBLICKEYINFO pCertPubKeyInfo,
void const *pvSignedDigest, size_t cbSignedDigest,
RTCRDIGEST hDigest, PRTERRINFO pErrInfo)
{
RTCRKEY hPublicKey;
int rc = RTCrKeyCreateFromPublicAlgorithmAndBits(&hPublicKey, &pCertPubKeyInfo->Algorithm.Algorithm,
&pCertPubKeyInfo->SubjectPublicKey, pErrInfo, NULL);
if (RT_SUCCESS(rc))
{
rc = RTCrPkixPubKeyVerifySignedDigest(&pCertPubKeyInfo->Algorithm.Algorithm, hPublicKey,
&pCertPubKeyInfo->Algorithm.Parameters, pvSignedDigest, cbSignedDigest,
hDigest, pErrInfo);
uint32_t cRefs = RTCrKeyRelease(hPublicKey);
Assert(cRefs == 0); RT_NOREF(cRefs);
}
return rc;
}
|
