| 1 | /* $Id: x509-verify.cpp 57358 2015-08-14 15:16:38Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Crypto - X.509, Signature verficiation.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2015 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include "internal/iprt.h"
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| 32 | #include <iprt/crypto/x509.h>
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| 33 | #include <iprt/crypto/pkix.h>
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| 34 |
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| 35 | #include <iprt/err.h>
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| 36 | #include <iprt/string.h>
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| 37 |
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| 38 |
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| 39 | RTDECL(int) RTCrX509Certificate_VerifySignature(PCRTCRX509CERTIFICATE pThis, PCRTASN1OBJID pAlgorithm,
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| 40 | PCRTASN1DYNTYPE pParameters, PCRTASN1BITSTRING pPublicKey,
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| 41 | PRTERRINFO pErrInfo)
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| 42 | {
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| 43 | /*
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| 44 | * Validate the input a little.
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| 45 | */
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| 46 | AssertPtrReturn(pThis, VERR_INVALID_POINTER);
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| 47 | AssertReturn(RTCrX509Certificate_IsPresent(pThis), VERR_INVALID_PARAMETER);
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| 48 |
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| 49 | AssertPtrReturn(pAlgorithm, VERR_INVALID_POINTER);
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| 50 | AssertReturn(RTAsn1ObjId_IsPresent(pAlgorithm), VERR_INVALID_POINTER);
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| 51 |
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| 52 | if (pParameters)
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| 53 | {
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| 54 | AssertPtrReturn(pParameters, VERR_INVALID_POINTER);
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| 55 | if (pParameters->enmType == RTASN1TYPE_NULL)
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| 56 | pParameters = NULL;
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| 57 | }
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| 58 |
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| 59 | AssertPtrReturn(pPublicKey, VERR_INVALID_POINTER);
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| 60 | AssertReturn(RTAsn1BitString_IsPresent(pPublicKey), VERR_INVALID_POINTER);
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| 61 |
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| 62 | /*
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| 63 | * Check if the algorithm matches.
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| 64 | */
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| 65 | const char *pszCipherOid = RTCrPkixGetCiperOidFromSignatureAlgorithm(&pThis->SignatureAlgorithm.Algorithm);
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| 66 | if (!pszCipherOid)
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| 67 | return RTErrInfoSetF(pErrInfo, VERR_CR_X509_UNKNOWN_CERT_SIGN_ALGO,
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| 68 | "Certificate signature algorithm not known: %s",
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| 69 | pThis->SignatureAlgorithm.Algorithm.szObjId);
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| 70 |
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| 71 | if (RTAsn1ObjId_CompareWithString(pAlgorithm, pszCipherOid) != 0)
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| 72 | return RTErrInfoSetF(pErrInfo, VERR_CR_X509_CERT_SIGN_ALGO_MISMATCH,
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| 73 | "Certificate signature cipher algorithm mismatch: cert uses %s (%s) while key uses %s",
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| 74 | pszCipherOid, pThis->SignatureAlgorithm.Algorithm.szObjId, pAlgorithm->szObjId);
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| 75 |
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| 76 | /*
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| 77 | * Here we should recode the to-be-signed part as DER, but we'll ASSUME
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| 78 | * that it's already in DER encoding. This is safe.
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| 79 | */
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| 80 | return RTCrPkixPubKeyVerifySignature(&pThis->SignatureAlgorithm.Algorithm, pParameters, pPublicKey, &pThis->SignatureValue,
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| 81 | RTASN1CORE_GET_RAW_ASN1_PTR(&pThis->TbsCertificate.SeqCore.Asn1Core),
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| 82 | RTASN1CORE_GET_RAW_ASN1_SIZE(&pThis->TbsCertificate.SeqCore.Asn1Core),
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| 83 | pErrInfo);
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| 84 | }
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| 85 |
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