1 | /* $Id: digest-core.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - Crypto - Cryptographic Hash / Message Digest API
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2019 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/digest.h>
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33 |
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34 | #include <iprt/asm.h>
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35 | #include <iprt/err.h>
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36 | #include <iprt/mem.h>
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37 | #include <iprt/string.h>
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38 | #include <iprt/crypto/x509.h>
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39 |
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40 |
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41 | /*********************************************************************************************************************************
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42 | * Structures and Typedefs *
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43 | *********************************************************************************************************************************/
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44 | /**
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45 | * Generic message digest instance.
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46 | */
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47 | typedef struct RTCRDIGESTINT
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48 | {
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49 | /** Magic value (RTCRDIGESTINT_MAGIC). */
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50 | uint32_t u32Magic;
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51 | /** Reference counter. */
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52 | uint32_t volatile cRefs;
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53 | /** Pointer to the message digest descriptor. */
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54 | PCRTCRDIGESTDESC pDesc;
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55 | /** The offset into abState of the storage space . At
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56 | * least RTCRDIGESTDESC::cbHash bytes is available at that location. */
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57 | uint32_t offHash;
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58 | /** State. */
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59 | uint32_t uState;
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60 | /** The number of bytes consumed. */
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61 | uint64_t cbConsumed;
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62 | /** Pointer to the data specific to the message digest algorithm. Points
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63 | * either to &abState[0] or to memory allocated with pDesc->pfnNew. */
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64 | void *pvState;
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65 | /** Opaque data specific to the message digest algorithm, size given by
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66 | * RTCRDIGESTDESC::cbState. This is followed by space for the final hash
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67 | * at offHash with size RTCRDIGESTDESC::cbHash. The data specific to the
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68 | * message digest algorithm can also be 0. In this case, pDesc->pfnNew()
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69 | * and pDesc->pfnFree() must not be NULL. */
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70 | uint8_t abState[1];
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71 | } RTCRDIGESTINT;
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72 | /** Pointer to a message digest instance. */
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73 | typedef RTCRDIGESTINT *PRTCRDIGESTINT;
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74 |
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75 | /** Magic value for RTCRDIGESTINT::u32Magic (Ralph C. Merkle). */
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76 | #define RTCRDIGESTINT_MAGIC UINT32_C(0x19520202)
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77 |
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78 | /** @name RTCRDIGESTINT::uState values.
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79 | * @{ */
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80 | /** Ready for more data. */
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81 | #define RTCRDIGEST_STATE_READY UINT32_C(1)
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82 | /** The hash has been finalized and can be found at offHash. */
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83 | #define RTCRDIGEST_STATE_FINAL UINT32_C(2)
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84 | /** Busted state, can happen after re-init. */
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85 | #define RTCRDIGEST_STATE_BUSTED UINT32_C(3)
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86 | /** @} */
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87 |
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88 |
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89 |
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90 | /**
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91 | * Used for successful returns which wants to hit at digest security.
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92 | *
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93 | * @retval VINF_SUCCESS
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94 | * @retval VINF_CR_DIGEST_DEPRECATED
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95 | * @retval VINF_CR_DIGEST_COMPROMISED
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96 | * @retval VINF_CR_DIGEST_SEVERELY_COMPROMISED
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97 | * @param pDesc The digest descriptor.
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98 | */
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99 | DECLINLINE(int) rtCrDigestSuccessWithDigestWarnings(PCRTCRDIGESTDESC pDesc)
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100 | {
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101 | uint32_t const fFlags = pDesc->fFlags
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102 | & (RTCRDIGESTDESC_F_DEPRECATED | RTCRDIGESTDESC_F_COMPROMISED | RTCRDIGESTDESC_F_SERVERELY_COMPROMISED);
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103 | if (!fFlags)
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104 | return VINF_SUCCESS;
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105 | if (fFlags & RTCRDIGESTDESC_F_SERVERELY_COMPROMISED)
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106 | return VINF_CR_DIGEST_SEVERELY_COMPROMISED;
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107 | if (fFlags & RTCRDIGESTDESC_F_COMPROMISED)
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108 | return VINF_CR_DIGEST_COMPROMISED;
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109 | return VINF_CR_DIGEST_DEPRECATED;
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110 | }
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111 |
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112 |
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113 | RTDECL(int) RTCrDigestCreate(PRTCRDIGEST phDigest, PCRTCRDIGESTDESC pDesc, void *pvOpaque)
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114 | {
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115 | AssertPtrReturn(phDigest, VERR_INVALID_POINTER);
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116 | AssertPtrReturn(pDesc, VERR_INVALID_POINTER);
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117 |
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118 | int rc = VINF_SUCCESS;
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119 | uint32_t const offHash = RT_ALIGN_32(pDesc->cbState, 8);
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120 | AssertReturn(pDesc->pfnNew || offHash, VERR_INVALID_PARAMETER);
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121 | AssertReturn(!pDesc->pfnNew || (pDesc->pfnFree && pDesc->pfnInit && pDesc->pfnClone), VERR_INVALID_PARAMETER);
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122 | PRTCRDIGESTINT pThis = (PRTCRDIGESTINT)RTMemAllocZ(RT_UOFFSETOF_DYN(RTCRDIGESTINT, abState[offHash + pDesc->cbHash]));
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123 | if (pThis)
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124 | {
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125 | if (pDesc->pfnNew)
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126 | pThis->pvState = pDesc->pfnNew();
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127 | else
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128 | pThis->pvState = &pThis->abState[0];
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129 | if (pThis->pvState)
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130 | {
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131 | pThis->u32Magic = RTCRDIGESTINT_MAGIC;
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132 | pThis->cRefs = 1;
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133 | pThis->offHash = offHash;
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134 | pThis->pDesc = pDesc;
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135 | pThis->uState = RTCRDIGEST_STATE_READY;
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136 | if (pDesc->pfnInit)
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137 | rc = pDesc->pfnInit(pThis->pvState, pvOpaque, false /*fReInit*/);
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138 | if (RT_SUCCESS(rc))
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139 | {
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140 | *phDigest = pThis;
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141 | return rtCrDigestSuccessWithDigestWarnings(pDesc);
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142 | }
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143 | if (pDesc->pfnFree)
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144 | pDesc->pfnFree(pThis->pvState);
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145 | }
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146 | else
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147 | rc = VERR_NO_MEMORY;
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148 | pThis->u32Magic = 0;
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149 | RTMemFree(pThis);
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150 | }
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151 | else
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152 | rc = VERR_NO_MEMORY;
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153 | return rc;
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154 | }
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155 |
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156 |
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157 | RTDECL(int) RTCrDigestClone(PRTCRDIGEST phDigest, RTCRDIGEST hSrc)
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158 | {
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159 | AssertPtrReturn(phDigest, VERR_INVALID_POINTER);
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160 | AssertPtrReturn(hSrc, VERR_INVALID_HANDLE);
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161 | AssertReturn(hSrc->u32Magic == RTCRDIGESTINT_MAGIC, VERR_INVALID_HANDLE);
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162 |
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163 | int rc = VINF_SUCCESS;
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164 | uint32_t const offHash = hSrc->offHash;
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165 | PRTCRDIGESTINT pThis = (PRTCRDIGESTINT)RTMemAllocZ(RT_UOFFSETOF_DYN(RTCRDIGESTINT, abState[offHash + hSrc->pDesc->cbHash]));
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166 | if (pThis)
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167 | {
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168 | if (hSrc->pDesc->pfnNew)
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169 | pThis->pvState = hSrc->pDesc->pfnNew();
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170 | else
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171 | pThis->pvState = &pThis->abState[0];
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172 | if (pThis->pvState)
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173 | {
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174 | pThis->u32Magic = RTCRDIGESTINT_MAGIC;
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175 | pThis->cRefs = 1;
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176 | pThis->offHash = offHash;
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177 | pThis->pDesc = hSrc->pDesc;
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178 | if (hSrc->pDesc->pfnClone)
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179 | rc = hSrc->pDesc->pfnClone(pThis->pvState, hSrc->pvState);
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180 | else
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181 | {
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182 | Assert(!hSrc->pDesc->pfnNew);
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183 | memcpy(pThis->pvState, hSrc->pvState, offHash);
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184 | }
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185 | memcpy(&pThis->abState[offHash], &hSrc->abState[offHash], hSrc->pDesc->cbHash);
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186 | pThis->uState = hSrc->uState;
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187 |
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188 | if (RT_SUCCESS(rc))
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189 | {
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190 | *phDigest = pThis;
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191 | return rtCrDigestSuccessWithDigestWarnings(pThis->pDesc);
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192 | }
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193 | if (hSrc->pDesc->pfnFree)
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194 | hSrc->pDesc->pfnFree(pThis->pvState);
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195 | }
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196 | else
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197 | rc = VERR_NO_MEMORY;
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198 | pThis->u32Magic = 0;
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199 | RTMemFree(pThis);
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200 | }
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201 | else
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202 | rc = VERR_NO_MEMORY;
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203 | return rc;
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204 | }
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205 |
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206 |
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207 | RTDECL(int) RTCrDigestReset(RTCRDIGEST hDigest)
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208 | {
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209 | PRTCRDIGESTINT pThis = hDigest;
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210 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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211 | AssertReturn(pThis->u32Magic == RTCRDIGESTINT_MAGIC, VERR_INVALID_HANDLE);
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212 |
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213 | pThis->cbConsumed = 0;
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214 | pThis->uState = RTCRDIGEST_STATE_READY;
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215 |
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216 | int rc = VINF_SUCCESS;
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217 | if (pThis->pDesc->pfnInit)
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218 | {
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219 | rc = pThis->pDesc->pfnInit(pThis->pvState, NULL, true /*fReInit*/);
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220 | if (RT_FAILURE(rc))
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221 | pThis->uState = RTCRDIGEST_STATE_BUSTED;
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222 | RT_BZERO(&pThis->abState[pThis->offHash], pThis->pDesc->cbHash);
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223 | }
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224 | else
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225 | {
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226 | Assert(!pThis->pDesc->pfnNew);
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227 | RT_BZERO(pThis->pvState, pThis->offHash + pThis->pDesc->cbHash);
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228 | }
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229 | return rc;
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230 | }
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231 |
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232 |
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233 | RTDECL(uint32_t) RTCrDigestRetain(RTCRDIGEST hDigest)
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234 | {
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235 | PRTCRDIGESTINT pThis = hDigest;
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236 | AssertPtrReturn(pThis, UINT32_MAX);
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237 | AssertReturn(pThis->u32Magic == RTCRDIGESTINT_MAGIC, UINT32_MAX);
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238 |
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239 | uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
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240 | Assert(cRefs < 64);
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241 | return cRefs;
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242 | }
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243 |
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244 |
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245 | RTDECL(uint32_t) RTCrDigestRelease(RTCRDIGEST hDigest)
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246 | {
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247 | PRTCRDIGESTINT pThis = hDigest;
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248 | if (pThis == NIL_RTCRDIGEST)
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249 | return 0;
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250 | AssertPtrReturn(pThis, UINT32_MAX);
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251 | AssertReturn(pThis->u32Magic == RTCRDIGESTINT_MAGIC, UINT32_MAX);
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252 |
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253 | uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs);
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254 | if (!cRefs)
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255 | {
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256 | pThis->u32Magic = ~RTCRDIGESTINT_MAGIC;
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257 | if (pThis->pDesc->pfnDelete)
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258 | pThis->pDesc->pfnDelete(pThis->pvState);
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259 | if (pThis->pDesc->pfnFree)
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260 | pThis->pDesc->pfnFree(pThis->pvState);
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261 | RTMemFree(pThis);
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262 | }
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263 | Assert(cRefs < 64);
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264 | return cRefs;
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265 | }
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266 |
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267 |
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268 | RTDECL(int) RTCrDigestUpdate(RTCRDIGEST hDigest, void const *pvData, size_t cbData)
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269 | {
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270 | PRTCRDIGESTINT pThis = hDigest;
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271 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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272 | AssertReturn(pThis->u32Magic == RTCRDIGESTINT_MAGIC, VERR_INVALID_HANDLE);
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273 | AssertReturn(pThis->uState == RTCRDIGEST_STATE_READY, VERR_INVALID_STATE);
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274 |
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275 | pThis->pDesc->pfnUpdate(pThis->pvState, pvData, cbData);
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276 | pThis->cbConsumed += cbData;
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277 | return VINF_SUCCESS;
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278 | }
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279 |
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280 |
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281 | RTDECL(int) RTCrDigestFinal(RTCRDIGEST hDigest, void *pvHash, size_t cbHash)
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282 | {
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283 | PRTCRDIGESTINT pThis = hDigest;
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284 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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285 | AssertReturn(pThis->u32Magic == RTCRDIGESTINT_MAGIC, VERR_INVALID_HANDLE);
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286 | AssertReturn(pThis->uState == RTCRDIGEST_STATE_READY || pThis->uState == RTCRDIGEST_STATE_FINAL, VERR_INVALID_STATE);
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287 | AssertPtrNullReturn(pvHash, VERR_INVALID_POINTER);
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288 |
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289 | /*
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290 | * Make sure the hash calculation is final.
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291 | */
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292 | if (pThis->uState == RTCRDIGEST_STATE_READY)
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293 | {
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294 | pThis->pDesc->pfnFinal(pThis->pvState, &pThis->abState[pThis->offHash]);
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295 | pThis->uState = RTCRDIGEST_STATE_FINAL;
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296 | }
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297 | else
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298 | AssertReturn(pThis->uState == RTCRDIGEST_STATE_FINAL, VERR_INVALID_STATE);
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299 |
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300 | /*
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301 | * Copy out the hash if requested.
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302 | */
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303 | if (cbHash > 0)
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304 | {
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305 | uint32_t cbNeeded = pThis->pDesc->cbHash;
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306 | if (pThis->pDesc->pfnGetHashSize)
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307 | cbNeeded = pThis->pDesc->pfnGetHashSize(pThis->pvState);
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308 | Assert(cbNeeded > 0);
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309 |
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310 | if (cbNeeded == cbHash)
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311 | memcpy(pvHash, &pThis->abState[pThis->offHash], cbNeeded);
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312 | else if (cbNeeded > cbHash)
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313 | {
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314 | memcpy(pvHash, &pThis->abState[pThis->offHash], cbNeeded);
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315 | memset((uint8_t *)pvHash + cbNeeded, 0, cbHash - cbNeeded);
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316 | return VINF_BUFFER_UNDERFLOW;
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317 | }
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318 | else
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319 | {
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320 | memcpy(pvHash, &pThis->abState[pThis->offHash], cbHash);
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321 | return VERR_BUFFER_OVERFLOW;
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322 | }
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323 | }
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324 |
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325 | return rtCrDigestSuccessWithDigestWarnings(pThis->pDesc);
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326 | }
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327 |
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328 |
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329 | RTDECL(bool) RTCrDigestMatch(RTCRDIGEST hDigest, void const *pvHash, size_t cbHash)
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330 | {
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331 | PRTCRDIGESTINT pThis = hDigest;
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332 |
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333 | int rc = RTCrDigestFinal(pThis, NULL, 0);
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334 | AssertRCReturn(rc, false);
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335 |
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336 | AssertPtrReturn(pvHash, false);
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337 | return pThis->pDesc->cbHash == cbHash
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338 | && !memcmp(&pThis->abState[pThis->offHash], pvHash, cbHash);
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339 | }
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340 |
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341 |
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342 | RTDECL(uint8_t const *) RTCrDigestGetHash(RTCRDIGEST hDigest)
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343 | {
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344 | PRTCRDIGESTINT pThis = hDigest;
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345 | AssertPtrReturn(pThis, NULL);
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346 | AssertReturn(pThis->u32Magic == RTCRDIGESTINT_MAGIC, NULL);
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347 |
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348 | int rc = RTCrDigestFinal(pThis, NULL, 0);
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349 | AssertRCReturn(rc, NULL);
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350 |
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351 | return &pThis->abState[pThis->offHash];
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352 | }
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353 |
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354 |
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355 | RTDECL(uint32_t) RTCrDigestGetHashSize(RTCRDIGEST hDigest)
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356 | {
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357 | PRTCRDIGESTINT pThis = hDigest;
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358 | AssertPtrReturn(pThis, 0);
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359 | AssertReturn(pThis->u32Magic == RTCRDIGESTINT_MAGIC, 0);
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360 | if (pThis->pDesc->pfnGetHashSize)
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361 | {
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362 | uint32_t cbHash = pThis->pDesc->pfnGetHashSize(pThis->pvState);
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363 | Assert(cbHash <= pThis->pDesc->cbHash);
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364 | return cbHash;
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365 | }
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366 | return pThis->pDesc->cbHash;
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367 | }
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368 |
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369 |
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370 | RTDECL(uint64_t) RTCrDigestGetConsumedSize(RTCRDIGEST hDigest)
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371 | {
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372 | PRTCRDIGESTINT pThis = hDigest;
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373 | AssertPtrReturn(pThis, 0);
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374 | AssertReturn(pThis->u32Magic == RTCRDIGESTINT_MAGIC, 0);
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375 | return pThis->cbConsumed;
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376 | }
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377 |
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378 |
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379 | RTDECL(bool) RTCrDigestIsFinalized(RTCRDIGEST hDigest)
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380 | {
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381 | PRTCRDIGESTINT pThis = hDigest;
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382 | AssertPtrReturn(pThis, false);
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383 | AssertReturn(pThis->u32Magic == RTCRDIGESTINT_MAGIC, false);
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384 | return pThis->uState == RTCRDIGEST_STATE_FINAL;
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385 | }
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386 |
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387 |
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388 | RTDECL(RTDIGESTTYPE) RTCrDigestGetType(RTCRDIGEST hDigest)
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389 | {
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390 | PRTCRDIGESTINT pThis = hDigest;
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391 | AssertPtrReturn(pThis, RTDIGESTTYPE_INVALID);
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392 | AssertReturn(pThis->u32Magic == RTCRDIGESTINT_MAGIC, RTDIGESTTYPE_INVALID);
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393 |
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394 | RTDIGESTTYPE enmType = pThis->pDesc->enmType;
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395 | if (pThis->pDesc->pfnGetDigestType)
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396 | enmType = pThis->pDesc->pfnGetDigestType(pThis->pvState);
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397 | return enmType;
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398 | }
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399 |
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400 |
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401 | RTDECL(const char *) RTCrDigestGetAlgorithmOid(RTCRDIGEST hDigest)
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402 | {
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403 | return RTCrDigestTypeToAlgorithmOid(RTCrDigestGetType(hDigest));
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404 | }
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405 |
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406 |
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407 | RTDECL(uint32_t) RTCrDigestGetFlags(RTCRDIGEST hDigest)
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408 | {
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409 | PRTCRDIGESTINT pThis = hDigest;
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410 | AssertPtrReturn(pThis, UINT32_MAX);
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411 | AssertReturn(pThis->u32Magic == RTCRDIGESTINT_MAGIC, UINT32_MAX);
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412 | return pThis->pDesc->fFlags;
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413 | }
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414 |
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415 |
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416 | RTDECL(const char *) RTCrDigestTypeToAlgorithmOid(RTDIGESTTYPE enmDigestType)
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417 | {
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418 | switch (enmDigestType)
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419 | {
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420 | case RTDIGESTTYPE_MD2: return RTCRX509ALGORITHMIDENTIFIERID_MD2;
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421 | case RTDIGESTTYPE_MD4: return RTCRX509ALGORITHMIDENTIFIERID_MD4;
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422 | case RTDIGESTTYPE_MD5: return RTCRX509ALGORITHMIDENTIFIERID_MD5;
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423 | case RTDIGESTTYPE_SHA1: return RTCRX509ALGORITHMIDENTIFIERID_SHA1;
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424 | case RTDIGESTTYPE_SHA224: return RTCRX509ALGORITHMIDENTIFIERID_SHA224;
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425 | case RTDIGESTTYPE_SHA256: return RTCRX509ALGORITHMIDENTIFIERID_SHA256;
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426 | case RTDIGESTTYPE_SHA384: return RTCRX509ALGORITHMIDENTIFIERID_SHA384;
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427 | case RTDIGESTTYPE_SHA512: return RTCRX509ALGORITHMIDENTIFIERID_SHA512;
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428 | default: return NULL;
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429 | }
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430 | }
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431 |
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432 |
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433 | RTDECL(const char *) RTCrDigestTypeToName(RTDIGESTTYPE enmDigestType)
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434 | {
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435 | switch (enmDigestType)
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436 | {
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437 | case RTDIGESTTYPE_CRC32: return "CRC32";
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438 | case RTDIGESTTYPE_CRC64: return "CRC64";
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439 | case RTDIGESTTYPE_MD2: return "MD2";
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440 | case RTDIGESTTYPE_MD4: return "MD4";
|
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441 | case RTDIGESTTYPE_MD5: return "MD5";
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442 | case RTDIGESTTYPE_SHA1: return "SHA-1";
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443 | case RTDIGESTTYPE_SHA224: return "SHA-224";
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444 | case RTDIGESTTYPE_SHA256: return "SHA-256";
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445 | case RTDIGESTTYPE_SHA384: return "SHA-384";
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446 | case RTDIGESTTYPE_SHA512: return "SHA-512";
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447 | case RTDIGESTTYPE_SHA512T224: return "SHA-512/224";
|
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448 | case RTDIGESTTYPE_SHA512T256: return "SHA-512/256";
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449 | default: return NULL;
|
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450 | }
|
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451 | }
|
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452 |
|
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453 |
|
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454 | RTDECL(uint32_t) RTCrDigestTypeToHashSize(RTDIGESTTYPE enmDigestType)
|
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455 | {
|
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456 | switch (enmDigestType)
|
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457 | {
|
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458 | case RTDIGESTTYPE_CRC32: return 32 / 8;
|
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459 | case RTDIGESTTYPE_CRC64: return 64 / 8;
|
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460 | case RTDIGESTTYPE_MD2: return 128 / 8;
|
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461 | case RTDIGESTTYPE_MD4: return 128 / 8;
|
---|
462 | case RTDIGESTTYPE_MD5: return 128 / 8;
|
---|
463 | case RTDIGESTTYPE_SHA1: return 160 / 8;
|
---|
464 | case RTDIGESTTYPE_SHA224: return 224 / 8;
|
---|
465 | case RTDIGESTTYPE_SHA256: return 256 / 8;
|
---|
466 | case RTDIGESTTYPE_SHA384: return 384 / 8;
|
---|
467 | case RTDIGESTTYPE_SHA512: return 512 / 8;
|
---|
468 | case RTDIGESTTYPE_SHA512T224: return 224 / 8;
|
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469 | case RTDIGESTTYPE_SHA512T256: return 256 / 8;
|
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470 | default:
|
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471 | AssertFailed();
|
---|
472 | return 0;
|
---|
473 | }
|
---|
474 | }
|
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475 |
|
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