/* $Id: pkix-sign.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */ /** @file * IPRT - Crypto - Public Key Infrastructure API, Verification. */ /* * Copyright (C) 2006-2022 Oracle and/or its affiliates. * * This file is part of VirtualBox base platform packages, as * available from https://www.virtualbox.org. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, in version 3 of the * License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included * in the VirtualBox 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. * * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #include "internal/iprt.h" #include #include #include #include #include #include #include #ifdef IPRT_WITH_OPENSSL # include "internal/iprt-openssl.h" # include "internal/openssl-pre.h" # include # include # include "internal/openssl-post.h" # ifndef OPENSSL_VERSION_NUMBER # error "Missing OPENSSL_VERSION_NUMBER!" # endif #endif #if 0 RTDECL(int) RTCrPkixPubKeySignData(PCRTASN1OBJID pAlgorithm, PCRTASN1DYNTYPE pParameters, PCRTASN1BITSTRING pPrivateKey, PCRTASN1BITSTRING pSignatureValue, const void *pvData, size_t cbData, PRTERRINFO pErrInfo) { /* * Validate the digest related inputs. */ AssertPtrReturn(pAlgorithm, VERR_INVALID_POINTER); AssertReturn(RTAsn1ObjId_IsPresent(pAlgorithm), VERR_INVALID_POINTER); AssertPtrReturn(pvData, VERR_INVALID_POINTER); AssertReturn(cbData > 0, VERR_INVALID_PARAMETER); /* * Digest the data and call the other API. */ RTCRDIGEST hDigest; int rc = RTCrDigestCreateByObjId(&hDigest, pAlgorithm); if (RT_SUCCESS(rcIprt)) { rc = RTCrDigestUpdate(hDigest, pvData, cbData); if (RT_SUCCESS(rcIprt)) rc = RTCrPkixPubKeySignDigest(pAlgorithm, pParameters, pPrivateKey, pvSignedDigest, cbSignedDigest, hDigest, pErrInfo); else RTErrInfoSet(pErrInfo, rcIprt, "RTCrDigestUpdate failed"); RTCrDigestRelease(hDigest); } else RTErrInfoSetF(pErrInfo, rcIprt, "Unknown digest algorithm [IPRT]: %s", pAlgorithm->szObjId); return rc; } #endif RTDECL(int) RTCrPkixPubKeySignDigest(PCRTASN1OBJID pAlgorithm, RTCRKEY hPrivateKey, PCRTASN1DYNTYPE pParameters, RTCRDIGEST hDigest, uint32_t fFlags, void *pvSignature, size_t *pcbSignature, 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(hPrivateKey, VERR_INVALID_POINTER); Assert(RTCrKeyHasPrivatePart(hPrivateKey)); AssertPtrReturn(pcbSignature, VERR_INVALID_PARAMETER); size_t cbSignature = *pcbSignature; if (cbSignature) AssertPtrReturn(pvSignature, VERR_INVALID_POINTER); else pvSignature = NULL; AssertPtrReturn(hDigest, VERR_INVALID_HANDLE); AssertReturn(fFlags == 0, VERR_INVALID_FLAGS); /* * 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."); /* * Sign using IPRT. */ RTCRPKIXSIGNATURE hSignature; int rcIprt = RTCrPkixSignatureCreateByObjId(&hSignature, pAlgorithm, hPrivateKey, pParameters, true /*fSigning*/); if (RT_FAILURE(rcIprt)) return RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_CIPHER_ALGO_NOT_KNOWN, "Unknown private key algorithm [IPRT]: %s", pAlgorithm->szObjId); rcIprt = RTCrPkixSignatureSign(hSignature, hDigest, pvSignature, pcbSignature); if (RT_FAILURE(rcIprt)) RTErrInfoSet(pErrInfo, rcIprt, "RTCrPkixSignatureSign failed"); RTCrPkixSignatureRelease(hSignature); /* * Sign using OpenSSL EVP if we can. */ #if defined(IPRT_WITH_OPENSSL) \ && (OPENSSL_VERSION_NUMBER > 0x10000000L) /* 0.9.8 doesn't seem to have EVP_PKEY_CTX_set_signature_md. */ /* Make sure the algorithm includes the digest and isn't just RSA. */ 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 private key. */ EVP_PKEY *pEvpPrivateKey = NULL; const EVP_MD *pEvpMdType = NULL; int rcOssl = rtCrKeyToOpenSslKeyEx(hPrivateKey, false /*fNeedPublic*/, pszAlgObjId, (void **)&pEvpPrivateKey, (const void **)&pEvpMdType, pErrInfo); if (RT_SUCCESS(rcOssl)) { /* Create an EVP Private key context we can use to validate the digest. */ EVP_PKEY_CTX *pEvpPKeyCtx = EVP_PKEY_CTX_new(pEvpPrivateKey, NULL); if (pEvpPKeyCtx) { rcOssl = EVP_PKEY_sign_init(pEvpPKeyCtx); if (rcOssl > 0) { rcOssl = EVP_PKEY_CTX_set_rsa_padding(pEvpPKeyCtx, RSA_PKCS1_PADDING); if (rcOssl > 0) { rcOssl = EVP_PKEY_CTX_set_signature_md(pEvpPKeyCtx, pEvpMdType); if (rcOssl > 0) { /* Allocate a signature buffer. */ unsigned char *pbOsslSignature = NULL; void *pvOsslSignatureFree = NULL; size_t cbOsslSignature = cbSignature; if (cbOsslSignature > 0) { if (cbOsslSignature < _1K) pbOsslSignature = (unsigned char *)alloca(cbOsslSignature); else { pbOsslSignature = (unsigned char *)RTMemTmpAlloc(cbOsslSignature); pvOsslSignatureFree = pbOsslSignature; } } if (cbOsslSignature == 0 || pbOsslSignature != NULL) { /* Get the digest from hDigest and sign it. */ rcOssl = EVP_PKEY_sign(pEvpPKeyCtx, pbOsslSignature, &cbOsslSignature, (const unsigned char *)RTCrDigestGetHash(hDigest), RTCrDigestGetHashSize(hDigest)); if (rcOssl > 0) { /* Compare the result. The memcmp assums no random padding bits. */ rcOssl = VINF_SUCCESS; AssertMsgStmt(cbOsslSignature == *pcbSignature, ("cbOsslSignature=%#x, iprt %#x\n", cbOsslSignature, *pcbSignature), rcOssl = VERR_CR_PKIX_OSSL_VS_IPRT_SIGNATURE_SIZE); AssertMsgStmt( pbOsslSignature == NULL || rcOssl != VINF_SUCCESS || memcmp(pbOsslSignature, pvSignature, cbOsslSignature) == 0, ("OpenSSL: %.*Rhxs\n" "IPRT: %.*Rhxs\n", cbOsslSignature, pbOsslSignature, *pcbSignature, pvSignature), rcOssl = VERR_CR_PKIX_OSSL_VS_IPRT_SIGNATURE); if (!pbOsslSignature && rcOssl == VINF_SUCCESS) rcOssl = VERR_BUFFER_OVERFLOW; } else rcOssl = RTErrInfoSetF(pErrInfo, VERR_CR_PKIX_OSSL_SIGN_FINAL_FAILED, "EVP_PKEY_sign failed (%d)", rcOssl); if (pvOsslSignatureFree) RTMemTmpFree(pvOsslSignatureFree); } else rcOssl = VERR_NO_TMP_MEMORY; } 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_RSA_PAD_ERROR, "EVP_PKEY_CTX_set_rsa_padding 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(pEvpPrivateKey); } /* * 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; }