| 1 | /** @file
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| 2 | * IPRT - Apple Code Signing Structures and APIs.
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2018-2019 Oracle Corporation
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| 7 | *
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| 8 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 9 | * available from http://www.virtualbox.org. This file is free software;
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| 10 | * you can redistribute it and/or modify it under the terms of the GNU
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| 11 | * General Public License (GPL) as published by the Free Software
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| 12 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 13 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 14 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | *
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| 16 | * The contents of this file may alternatively be used under the terms
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| 17 | * of the Common Development and Distribution License Version 1.0
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| 18 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 19 | * VirtualBox OSE distribution, in which case the provisions of the
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| 20 | * CDDL are applicable instead of those of the GPL.
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| 21 | *
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| 22 | * You may elect to license modified versions of this file under the
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| 23 | * terms and conditions of either the GPL or the CDDL or both.
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| 24 | */
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| 25 |
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| 26 | #ifndef IPRT_INCLUDED_crypto_applecodesign_h
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| 27 | #define IPRT_INCLUDED_crypto_applecodesign_h
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| 28 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 29 | # pragma once
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| 30 | #endif
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| 31 |
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| 32 | #include <iprt/types.h>
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| 33 | #include <iprt/assertcompile.h>
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| 34 | #include <iprt/crypto/pkcs7.h>
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| 35 |
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| 36 | /** @defgroup grp_rt_craplcs RTCrAppleCs - Apple Code Signing
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| 37 | * @ingroup grp_rt_crypto
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| 38 | * @{
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| 39 | */
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| 40 |
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| 41 | /** Apple developer ID for application signing. */
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| 42 | #define RTCR_APPLE_CS_DEVID_APPLICATION_OID "1.2.840.113635.100.6.1.13"
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| 43 | /** Apple developer ID for installer signing. */
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| 44 | #define RTCR_APPLE_CS_DEVID_INSTALLER_OID "1.2.840.113635.100.6.1.14"
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| 45 | /** Apple developer ID for kernel extension signing. */
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| 46 | #define RTCR_APPLE_CS_DEVID_KEXT_OID "1.2.840.113635.100.6.1.18"
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| 47 | /** Apple certificate policy OID. */
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| 48 | #define RTCR_APPLE_CS_CERTIFICATE_POLICY_OID "1.2.840.113635.100.5.1"
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| 49 |
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| 50 |
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| 51 | /** @name RTCRAPLCS_MAGIC_XXX - Apple code signing magic values for identifying blobs
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| 52 | * @note No byte order conversion required.
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| 53 | * @{ */
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| 54 | #define RTCRAPLCS_MAGIC_BLOBWRAPPER RT_N2H_U32_C(UINT32_C(0xfade0b01))
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| 55 | #define RTCRAPLCS_MAGIC_EMBEDDED_SIGNATURE_OLD RT_N2H_U32_C(UINT32_C(0xfade0b02))
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| 56 | #define RTCRAPLCS_MAGIC_REQUIREMENT RT_N2H_U32_C(UINT32_C(0xfade0c00))
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| 57 | #define RTCRAPLCS_MAGIC_REQUIREMENTS RT_N2H_U32_C(UINT32_C(0xfade0c01))
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| 58 | #define RTCRAPLCS_MAGIC_CODEDIRECTORY RT_N2H_U32_C(UINT32_C(0xfade0c02))
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| 59 | #define RTCRAPLCS_MAGIC_EMBEDDED_SIGNATURE RT_N2H_U32_C(UINT32_C(0xfade0cc0))
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| 60 | #define RTCRAPLCS_MAGIC_DETACHED_SIGNATURE RT_N2H_U32_C(UINT32_C(0xfade0cc1))
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| 61 | /** @} */
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| 62 |
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| 63 | /** @name Apple code signing versions.
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| 64 | * @note Requires byte order conversion of the field value. That way
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| 65 | * greater-than and less-than comparisons works correctly.
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| 66 | * @{ */
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| 67 | #define RTCRAPLCS_VER_2_0 UINT32_C(0x00020000)
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| 68 | #define RTCRAPLCS_VER_SUPPORTS_SCATTER UINT32_C(0x00020100)
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| 69 | #define RTCRAPLCS_VER_SUPPORTS_TEAMID UINT32_C(0x00020200)
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| 70 | #define RTCRAPLCS_VER_SUPPORTS_CODE_LIMIT_64 UINT32_C(0x00020300)
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| 71 | #define RTCRAPLCS_VER_SUPPORTS_EXEC_SEG UINT32_C(0x00020400)
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| 72 | /** @} */
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| 73 |
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| 74 | /** @name RTCRAPLCS_SLOT_XXX - Apple code signing slots.
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| 75 | * @note No byte order conversion required.
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| 76 | * @{ */
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| 77 | #define RTCRAPLCS_SLOT_CODEDIRECTORY RT_N2H_U32_C(UINT32_C(0x00000000))
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| 78 | #define RTCRAPLCS_SLOT_INFO RT_N2H_U32_C(UINT32_C(0x00000001))
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| 79 | #define RTCRAPLCS_SLOT_REQUIREMENTS RT_N2H_U32_C(UINT32_C(0x00000002))
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| 80 | #define RTCRAPLCS_SLOT_RESOURCEDIR RT_N2H_U32_C(UINT32_C(0x00000003))
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| 81 | #define RTCRAPLCS_SLOT_APPLICATION RT_N2H_U32_C(UINT32_C(0x00000004))
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| 82 | #define RTCRAPLCS_SLOT_ENTITLEMENTS RT_N2H_U32_C(UINT32_C(0x00000005))
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| 83 | #define RTCRAPLCS_SLOT_ALTERNATE_CODEDIRECTORIES RT_N2H_U32_C(UINT32_C(0x00001000))
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| 84 | #define RTCRAPLCS_SLOT_ALTERNATE_CODEDIRECTORIES_END RT_N2H_U32_C(UINT32_C(0x00001005))
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| 85 | #define RTCRAPLCS_SLOT_ALTERNATE_CODEDIRECTORIES_COUNT UINT32_C(0x00000005)
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| 86 | #define RTCRAPLCS_SLOT_ALTERNATE_CODEDIRECTORY_INC RT_N2H_U32_C(UINT32_C(0x00000001))
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| 87 | /** The signature.
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| 88 | * This is simply a RTCRAPLCSHDR/RTCRAPLCS_MAGIC_BLOBWRAPPER followed by a DER
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| 89 | * encoded \#PKCS7 ContentInfo structure containing signedData. The inner
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| 90 | * signedData structure signs external data, so its ContentInfo member is set
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| 91 | * to 1.2.840.113549.1.7.1 and has no data. */
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| 92 | #define RTCRAPLCS_SLOT_SIGNATURE RT_N2H_U32_C(UINT32_C(0x00010000))
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| 93 | /** @} */
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| 94 |
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| 95 | /** @name RTCRAPLCS_HASHTYPE_XXX - Apple code signing hash types
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| 96 | * @note Byte sized field, so no byte order concerns.
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| 97 | * @{ */
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| 98 | #define RTCRAPLCS_HASHTYPE_SHA1 UINT8_C(1)
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| 99 | #define RTCRAPLCS_HASHTYPE_SHA256 UINT8_C(2)
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| 100 | #define RTCRAPLCS_HASHTYPE_SHA256_TRUNCATED UINT8_C(3) /**< Truncated to 20 bytes (SHA1 size). */
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| 101 | #define RTCRAPLCS_HASHTYPE_SHA384 UINT8_C(4)
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| 102 | /** @} */
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| 103 |
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| 104 |
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| 105 | /**
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| 106 | * Apple code signing blob header.
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| 107 | */
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| 108 | typedef struct RTCRAPLCSHDR
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| 109 | {
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| 110 | /** The magic value (RTCRAPLCS_MAGIC_XXX).
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| 111 | * (Big endian, but constant are big endian already.) */
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| 112 | uint32_t uMagic;
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| 113 | /** The total length of the blob. Big endian. */
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| 114 | uint32_t cb;
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| 115 | } RTCRAPLCSHDR;
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| 116 | AssertCompileSize(RTCRAPLCSHDR, 8);
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| 117 | /** Pointer to a CS blob header. */
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| 118 | typedef RTCRAPLCSHDR *PRTCRAPLCSHDR;
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| 119 | /** Pointer to a const CS blob header. */
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| 120 | typedef RTCRAPLCSHDR const *PCRTCRAPLCSHDR;
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| 121 |
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| 122 | /**
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| 123 | * Apple code signing super blob slot.
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| 124 | */
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| 125 | typedef struct RTCRAPLCSBLOBSLOT
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| 126 | {
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| 127 | /** Slot type, RTCRAPLCS_SLOT_XXX.
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| 128 | * (Big endian, but so are the constants too). */
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| 129 | uint32_t uType;
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| 130 | /** Data offset. Big endian. */
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| 131 | uint32_t offData;
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| 132 | } RTCRAPLCSBLOBSLOT;
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| 133 | AssertCompileSize(RTCRAPLCSBLOBSLOT, 8);
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| 134 | /** Pointer to a super blob slot. */
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| 135 | typedef RTCRAPLCSBLOBSLOT *PRTCRAPLCSBLOBSLOT;
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| 136 | /** Pointer to a const super blob slot. */
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| 137 | typedef RTCRAPLCSBLOBSLOT const *PCRTCRAPLCSBLOBSLOT;
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| 138 |
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| 139 | /**
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| 140 | * Apple code signing super blob.
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| 141 | */
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| 142 | typedef struct RTCRAPLCSSUPERBLOB
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| 143 | {
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| 144 | /** Header (uMagic = RTCRAPLCS_MAGIC_EMBEDDED_SIGNATURE?
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| 145 | * or RTCRAPLCS_MAGIC_EMBEDDED_SIGNATURE_OLD? ). */
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| 146 | RTCRAPLCSHDR Hdr;
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| 147 | /** Number of slots. Big endian. */
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| 148 | uint32_t cSlots;
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| 149 | /** Slots. */
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| 150 | RTCRAPLCSBLOBSLOT aSlots[RT_FLEXIBLE_ARRAY];
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| 151 | } RTCRAPLCSSUPERBLOB;
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| 152 | AssertCompileMemberOffset(RTCRAPLCSSUPERBLOB, aSlots, 12);
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| 153 | /** Pointer to a CS super blob. */
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| 154 | typedef RTCRAPLCSSUPERBLOB *PRTCRAPLCSSUPERBLOB;
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| 155 | /** Pointer to a const CS super blob. */
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| 156 | typedef RTCRAPLCSSUPERBLOB const *PCRTCRAPLCSSUPERBLOB;
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| 157 |
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| 158 | /**
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| 159 | * Code directory (RTCRAPLCS_MAGIC_CODEDIRECTORY).
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| 160 | */
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| 161 | typedef struct RTCRAPLCSCODEDIRECTORY
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| 162 | {
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| 163 | /** 0x00: Header (uMagic = RTCRAPLCS_MAGIC_CODEDIRECTORY). */
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| 164 | RTCRAPLCSHDR Hdr;
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| 165 | /** 0x08: The version number (RTCRAPLCS_VER_XXX).
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| 166 | * @note Big endian, host order constants. */
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| 167 | uint32_t uVersion;
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| 168 | /** 0x0c: Flags & mode, RTCRAPLCS_???. (Big endian. ) */
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| 169 | uint32_t fFlags;
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| 170 | /** 0x10: Offset of the hash slots. Big endian.
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| 171 | * Special slots found below this offset, code slots at and after. */
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| 172 | uint32_t offHashSlots;
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| 173 | /** 0x14: Offset of the identifier string. Big endian. */
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| 174 | uint32_t offIdentifier;
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| 175 | /** 0x18: Number of special hash slots. Hubertus Bigend style. */
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| 176 | uint32_t cSpecialSlots;
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| 177 | /** 0x1c: Number of code hash slots. Big endian. */
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| 178 | uint32_t cCodeSlots;
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| 179 | /** 0x20: Number of bytes of code that's covered, 32-bit wide. Big endian. */
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| 180 | uint32_t cbCodeLimit32;
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| 181 | /** 0x24: The hash size. */
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| 182 | uint8_t cbHash;
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| 183 | /** 0x25: The hash type (RTCRAPLCS_HASHTYPE_XXX). */
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| 184 | uint8_t bHashType;
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| 185 | /** 0x26: Platform identifier or zero. */
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| 186 | uint8_t idPlatform;
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| 187 | /** 0x27: The page shift value. zero if infinite page size. */
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| 188 | uint8_t cPageShift;
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| 189 | /** 0x28: Spare field, MBZ. */
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| 190 | uint32_t uUnused1;
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| 191 | /** 0x2c: Offset of scatter vector (optional). Big endian.
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| 192 | * @since RTCRAPLCS_VER_SUPPORTS_SCATTER */
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| 193 | uint32_t offScatter;
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| 194 | /** 0x30: Offset of team identifier (optional). Big endian.
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| 195 | * @since RTCRAPLCS_VER_SUPPORTS_TEAMID */
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| 196 | uint32_t offTeamId;
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| 197 | /** 0x34: Unused field, MBZ.
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| 198 | * @since RTCRAPLCS_VER_SUPPORTS_CODE_LIMIT_64 */
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| 199 | uint32_t uUnused2;
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| 200 | /** 0x38: Number of bytes of code that's covered, 64-bit wide. Big endian.
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| 201 | * @since RTCRAPLCS_VER_SUPPORTS_CODE_LIMIT_64 */
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| 202 | uint64_t cbCodeLimit64;
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| 203 | /** 0x40: File offset of the first segment. Big endian.
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| 204 | * @since RTCRAPLCS_VER_SUPPORTS_EXEC_SEG */
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| 205 | uint64_t offExecSeg;
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| 206 | /** 0x48: The size of the first segment. Big endian.
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| 207 | * @since RTCRAPLCS_VER_SUPPORTS_EXEC_SEG */
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| 208 | uint64_t cbExecSeg;
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| 209 | /** 0x50: Flags for the first segment. Big endian.
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| 210 | * @since RTCRAPLCS_VER_SUPPORTS_EXEC_SEG */
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| 211 | uint64_t fExecSeg;
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| 212 | } RTCRAPLCSCODEDIRECTORY;
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| 213 | AssertCompileSize(RTCRAPLCSCODEDIRECTORY, 0x58);
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| 214 | /** Pointer to a CS code directory. */
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| 215 | typedef RTCRAPLCSCODEDIRECTORY *PRTCRAPLCSCODEDIRECTORY;
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| 216 | /** Pointer to a const CS code directory. */
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| 217 | typedef RTCRAPLCSCODEDIRECTORY const *PCRTCRAPLCSCODEDIRECTORY;
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| 218 |
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| 219 |
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| 220 | /**
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| 221 | * IPRT structure for working with an Apple code signing blob.
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| 222 | */
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| 223 | typedef struct RTCRAPLCS
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| 224 | {
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| 225 | uint8_t const *pbBlob;
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| 226 | size_t cbBlob;
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| 227 | size_t auReserved[4];
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| 228 | } RTCRAPLCS;
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| 229 | /** Pointer to an IPRT CS blob descriptor. */
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| 230 | typedef RTCRAPLCS *PRTCRAPLCS;
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| 231 |
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| 232 | /**
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| 233 | * Initialize a RTCRAPLCS descriptor and validate the blob data.
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| 234 | *
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| 235 | * @returns IPRT status code.
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| 236 | * @param pDesc The descirptor to initialize.
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| 237 | * @param pvBlob The blob bytes.
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| 238 | * @param cbBlob The number of bytes in the blob.
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| 239 | * @param fFlags Future validation flags, MBZ.
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| 240 | * @param pErrInfo Where to return additional error details. Optional.
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| 241 | */
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| 242 | RTDECL(int) RTCrAppleCsInit(PRTCRAPLCS pDesc, void const *pvBlob, size_t cbBlob, uint32_t fFlags, PRTERRINFO pErrInfo);
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| 243 |
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| 244 | /**
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| 245 | * Callback used by RTCrAppleCsVerifyImage to digest a section of the image.
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| 246 | *
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| 247 | * @return IPRT status code.
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| 248 | * @param hDigest The digest to feed the bytes to.
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| 249 | * @param off The RVA of the bytes to digest.
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| 250 | * @param cb Number of bytes to digest.
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| 251 | * @param pvUser User argument.
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| 252 | */
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| 253 | typedef DECLCALLBACK(int) FNRTCRAPPLECSDIGESTAREA(RTCRDIGEST hDigest, size_t off, size_t cb, void *pvUser);
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| 254 | /** Pointer to a image digest callback. */
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| 255 | typedef FNRTCRAPPLECSDIGESTAREA *PFNRTCRAPPLECSDIGESTAREA;
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| 256 |
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| 257 | /**
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| 258 | * Verifies an image against the given signature blob.
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| 259 | *
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| 260 | * @return IPRT status code.
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| 261 | * @param pDesc The apple code signing blob to verify against.
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| 262 | * @param fFlags Future verification flags, MBZ.
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| 263 | * @param pfnCallback Image digest callback.
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| 264 | * @param pvUser User argument for the callback.
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| 265 | * @param pErrInfo Where to return additional error details. Optional.
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| 266 | */
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| 267 | RTDECL(int) RTCrAppleCsVerifyImage(PRTCRAPLCS pDesc, uint32_t fFlags, PFNRTCRAPPLECSDIGESTAREA pfnCallback,
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| 268 | void *pvUser, PRTERRINFO pErrInfo);
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| 269 |
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| 270 | RTDECL(int) RTCrAppleCsQuerySigneddData(PRTCRAPLCS pDesc, PRTCRPKCS7SIGNEDDATA pSignedData, PRTERRINFO pErrInfo);
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| 271 |
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| 272 | /** @} */
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| 273 |
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| 274 | #endif /* !IPRT_INCLUDED_crypto_applecodesign_h */
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| 275 |
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