1 | /*
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2 | * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
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3 | *
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4 | * Licensed under the OpenSSL license (the "License"). You may not use
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5 | * this file except in compliance with the License. You can obtain a copy
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6 | * in the file LICENSE in the source distribution or at
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7 | * https://www.openssl.org/source/license.html
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8 | */
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9 |
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10 | #include "internal/cryptlib.h"
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11 | #include <openssl/asn1t.h>
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12 | #include <openssl/pem.h>
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13 | #include <openssl/x509v3.h>
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14 | #include <openssl/err.h>
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15 | #include <openssl/cms.h>
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16 | #include <openssl/aes.h>
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17 | #include "cms_lcl.h"
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18 | #include "internal/asn1_int.h"
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19 | #include "internal/evp_int.h"
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20 |
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21 | /* CMS EnvelopedData Utilities */
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22 |
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23 | CMS_EnvelopedData *cms_get0_enveloped(CMS_ContentInfo *cms)
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24 | {
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25 | if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_enveloped) {
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26 | CMSerr(CMS_F_CMS_GET0_ENVELOPED,
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27 | CMS_R_CONTENT_TYPE_NOT_ENVELOPED_DATA);
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28 | return NULL;
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29 | }
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30 | return cms->d.envelopedData;
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31 | }
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32 |
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33 | static CMS_EnvelopedData *cms_enveloped_data_init(CMS_ContentInfo *cms)
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34 | {
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35 | if (cms->d.other == NULL) {
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36 | cms->d.envelopedData = M_ASN1_new_of(CMS_EnvelopedData);
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37 | if (!cms->d.envelopedData) {
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38 | CMSerr(CMS_F_CMS_ENVELOPED_DATA_INIT, ERR_R_MALLOC_FAILURE);
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39 | return NULL;
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40 | }
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41 | cms->d.envelopedData->version = 0;
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42 | cms->d.envelopedData->encryptedContentInfo->contentType =
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43 | OBJ_nid2obj(NID_pkcs7_data);
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44 | ASN1_OBJECT_free(cms->contentType);
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45 | cms->contentType = OBJ_nid2obj(NID_pkcs7_enveloped);
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46 | return cms->d.envelopedData;
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47 | }
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48 | return cms_get0_enveloped(cms);
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49 | }
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50 |
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51 | int cms_env_asn1_ctrl(CMS_RecipientInfo *ri, int cmd)
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52 | {
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53 | EVP_PKEY *pkey;
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54 | int i;
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55 | if (ri->type == CMS_RECIPINFO_TRANS)
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56 | pkey = ri->d.ktri->pkey;
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57 | else if (ri->type == CMS_RECIPINFO_AGREE) {
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58 | EVP_PKEY_CTX *pctx = ri->d.kari->pctx;
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59 | if (!pctx)
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60 | return 0;
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61 | pkey = EVP_PKEY_CTX_get0_pkey(pctx);
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62 | if (!pkey)
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63 | return 0;
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64 | } else
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65 | return 0;
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66 | if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
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67 | return 1;
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68 | i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_ENVELOPE, cmd, ri);
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69 | if (i == -2) {
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70 | CMSerr(CMS_F_CMS_ENV_ASN1_CTRL,
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71 | CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
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72 | return 0;
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73 | }
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74 | if (i <= 0) {
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75 | CMSerr(CMS_F_CMS_ENV_ASN1_CTRL, CMS_R_CTRL_FAILURE);
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76 | return 0;
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77 | }
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78 | return 1;
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79 | }
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80 |
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81 | STACK_OF(CMS_RecipientInfo) *CMS_get0_RecipientInfos(CMS_ContentInfo *cms)
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82 | {
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83 | CMS_EnvelopedData *env;
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84 | env = cms_get0_enveloped(cms);
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85 | if (!env)
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86 | return NULL;
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87 | return env->recipientInfos;
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88 | }
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89 |
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90 | int CMS_RecipientInfo_type(CMS_RecipientInfo *ri)
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91 | {
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92 | return ri->type;
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93 | }
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94 |
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95 | EVP_PKEY_CTX *CMS_RecipientInfo_get0_pkey_ctx(CMS_RecipientInfo *ri)
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96 | {
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97 | if (ri->type == CMS_RECIPINFO_TRANS)
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98 | return ri->d.ktri->pctx;
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99 | else if (ri->type == CMS_RECIPINFO_AGREE)
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100 | return ri->d.kari->pctx;
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101 | return NULL;
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102 | }
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103 |
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104 | CMS_ContentInfo *CMS_EnvelopedData_create(const EVP_CIPHER *cipher)
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105 | {
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106 | CMS_ContentInfo *cms;
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107 | CMS_EnvelopedData *env;
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108 | cms = CMS_ContentInfo_new();
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109 | if (cms == NULL)
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110 | goto merr;
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111 | env = cms_enveloped_data_init(cms);
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112 | if (env == NULL)
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113 | goto merr;
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114 | if (!cms_EncryptedContent_init(env->encryptedContentInfo,
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115 | cipher, NULL, 0))
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116 | goto merr;
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117 | return cms;
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118 | merr:
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119 | CMS_ContentInfo_free(cms);
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120 | CMSerr(CMS_F_CMS_ENVELOPEDDATA_CREATE, ERR_R_MALLOC_FAILURE);
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121 | return NULL;
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122 | }
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123 |
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124 | /* Key Transport Recipient Info (KTRI) routines */
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125 |
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126 | /* Initialise a ktri based on passed certificate and key */
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127 |
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128 | static int cms_RecipientInfo_ktri_init(CMS_RecipientInfo *ri, X509 *recip,
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129 | EVP_PKEY *pk, unsigned int flags)
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130 | {
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131 | CMS_KeyTransRecipientInfo *ktri;
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132 | int idtype;
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133 |
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134 | ri->d.ktri = M_ASN1_new_of(CMS_KeyTransRecipientInfo);
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135 | if (!ri->d.ktri)
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136 | return 0;
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137 | ri->type = CMS_RECIPINFO_TRANS;
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138 |
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139 | ktri = ri->d.ktri;
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140 |
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141 | if (flags & CMS_USE_KEYID) {
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142 | ktri->version = 2;
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143 | idtype = CMS_RECIPINFO_KEYIDENTIFIER;
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144 | } else {
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145 | ktri->version = 0;
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146 | idtype = CMS_RECIPINFO_ISSUER_SERIAL;
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147 | }
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148 |
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149 | /*
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150 | * Not a typo: RecipientIdentifier and SignerIdentifier are the same
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151 | * structure.
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152 | */
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153 |
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154 | if (!cms_set1_SignerIdentifier(ktri->rid, recip, idtype))
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155 | return 0;
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156 |
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157 | X509_up_ref(recip);
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158 | EVP_PKEY_up_ref(pk);
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159 |
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160 | ktri->pkey = pk;
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161 | ktri->recip = recip;
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162 |
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163 | if (flags & CMS_KEY_PARAM) {
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164 | ktri->pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL);
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165 | if (ktri->pctx == NULL)
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166 | return 0;
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167 | if (EVP_PKEY_encrypt_init(ktri->pctx) <= 0)
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168 | return 0;
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169 | } else if (!cms_env_asn1_ctrl(ri, 0))
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170 | return 0;
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171 | return 1;
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172 | }
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173 |
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174 | /*
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175 | * Add a recipient certificate using appropriate type of RecipientInfo
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176 | */
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177 |
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178 | CMS_RecipientInfo *CMS_add1_recipient_cert(CMS_ContentInfo *cms,
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179 | X509 *recip, unsigned int flags)
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180 | {
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181 | CMS_RecipientInfo *ri = NULL;
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182 | CMS_EnvelopedData *env;
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183 | EVP_PKEY *pk = NULL;
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184 | env = cms_get0_enveloped(cms);
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185 | if (!env)
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186 | goto err;
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187 |
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188 | /* Initialize recipient info */
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189 | ri = M_ASN1_new_of(CMS_RecipientInfo);
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190 | if (!ri)
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191 | goto merr;
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192 |
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193 | pk = X509_get0_pubkey(recip);
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194 | if (!pk) {
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195 | CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, CMS_R_ERROR_GETTING_PUBLIC_KEY);
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196 | goto err;
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197 | }
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198 |
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199 | switch (cms_pkey_get_ri_type(pk)) {
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200 |
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201 | case CMS_RECIPINFO_TRANS:
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202 | if (!cms_RecipientInfo_ktri_init(ri, recip, pk, flags))
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203 | goto err;
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204 | break;
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205 |
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206 | case CMS_RECIPINFO_AGREE:
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207 | if (!cms_RecipientInfo_kari_init(ri, recip, pk, flags))
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208 | goto err;
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209 | break;
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210 |
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211 | default:
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212 | CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT,
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213 | CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
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214 | goto err;
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215 |
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216 | }
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217 |
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218 | if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
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219 | goto merr;
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220 |
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221 | return ri;
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222 |
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223 | merr:
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224 | CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, ERR_R_MALLOC_FAILURE);
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225 | err:
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226 | M_ASN1_free_of(ri, CMS_RecipientInfo);
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227 | return NULL;
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228 |
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229 | }
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230 |
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231 | int CMS_RecipientInfo_ktri_get0_algs(CMS_RecipientInfo *ri,
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232 | EVP_PKEY **pk, X509 **recip,
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233 | X509_ALGOR **palg)
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234 | {
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235 | CMS_KeyTransRecipientInfo *ktri;
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236 | if (ri->type != CMS_RECIPINFO_TRANS) {
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237 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_ALGS,
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238 | CMS_R_NOT_KEY_TRANSPORT);
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239 | return 0;
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240 | }
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241 |
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242 | ktri = ri->d.ktri;
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243 |
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244 | if (pk)
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245 | *pk = ktri->pkey;
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246 | if (recip)
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247 | *recip = ktri->recip;
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248 | if (palg)
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249 | *palg = ktri->keyEncryptionAlgorithm;
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250 | return 1;
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251 | }
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252 |
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253 | int CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo *ri,
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254 | ASN1_OCTET_STRING **keyid,
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255 | X509_NAME **issuer,
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256 | ASN1_INTEGER **sno)
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257 | {
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258 | CMS_KeyTransRecipientInfo *ktri;
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259 | if (ri->type != CMS_RECIPINFO_TRANS) {
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260 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_SIGNER_ID,
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261 | CMS_R_NOT_KEY_TRANSPORT);
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262 | return 0;
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263 | }
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264 | ktri = ri->d.ktri;
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265 |
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266 | return cms_SignerIdentifier_get0_signer_id(ktri->rid, keyid, issuer, sno);
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267 | }
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268 |
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269 | int CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert)
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270 | {
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271 | if (ri->type != CMS_RECIPINFO_TRANS) {
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272 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_CERT_CMP,
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273 | CMS_R_NOT_KEY_TRANSPORT);
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274 | return -2;
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275 | }
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276 | return cms_SignerIdentifier_cert_cmp(ri->d.ktri->rid, cert);
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277 | }
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278 |
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279 | int CMS_RecipientInfo_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pkey)
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280 | {
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281 | if (ri->type != CMS_RECIPINFO_TRANS) {
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282 | CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_PKEY, CMS_R_NOT_KEY_TRANSPORT);
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283 | return 0;
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284 | }
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285 | ri->d.ktri->pkey = pkey;
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286 | return 1;
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287 | }
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288 |
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289 | /* Encrypt content key in key transport recipient info */
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290 |
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291 | static int cms_RecipientInfo_ktri_encrypt(CMS_ContentInfo *cms,
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292 | CMS_RecipientInfo *ri)
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293 | {
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294 | CMS_KeyTransRecipientInfo *ktri;
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295 | CMS_EncryptedContentInfo *ec;
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296 | EVP_PKEY_CTX *pctx;
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297 | unsigned char *ek = NULL;
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298 | size_t eklen;
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299 |
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300 | int ret = 0;
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301 |
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302 | if (ri->type != CMS_RECIPINFO_TRANS) {
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303 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_NOT_KEY_TRANSPORT);
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304 | return 0;
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305 | }
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306 | ktri = ri->d.ktri;
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307 | ec = cms->d.envelopedData->encryptedContentInfo;
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308 |
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309 | pctx = ktri->pctx;
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310 |
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311 | if (pctx) {
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312 | if (!cms_env_asn1_ctrl(ri, 0))
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313 | goto err;
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314 | } else {
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315 | pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL);
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316 | if (pctx == NULL)
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317 | return 0;
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318 |
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319 | if (EVP_PKEY_encrypt_init(pctx) <= 0)
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320 | goto err;
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321 | }
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322 |
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323 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
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324 | EVP_PKEY_CTRL_CMS_ENCRYPT, 0, ri) <= 0) {
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325 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_CTRL_ERROR);
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326 | goto err;
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327 | }
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328 |
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329 | if (EVP_PKEY_encrypt(pctx, NULL, &eklen, ec->key, ec->keylen) <= 0)
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330 | goto err;
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331 |
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332 | ek = OPENSSL_malloc(eklen);
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333 |
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334 | if (ek == NULL) {
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335 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, ERR_R_MALLOC_FAILURE);
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336 | goto err;
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337 | }
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338 |
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339 | if (EVP_PKEY_encrypt(pctx, ek, &eklen, ec->key, ec->keylen) <= 0)
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340 | goto err;
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341 |
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342 | ASN1_STRING_set0(ktri->encryptedKey, ek, eklen);
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343 | ek = NULL;
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344 |
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345 | ret = 1;
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346 |
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347 | err:
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348 | EVP_PKEY_CTX_free(pctx);
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349 | ktri->pctx = NULL;
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350 | OPENSSL_free(ek);
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351 | return ret;
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352 |
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353 | }
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354 |
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355 | /* Decrypt content key from KTRI */
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356 |
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357 | static int cms_RecipientInfo_ktri_decrypt(CMS_ContentInfo *cms,
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358 | CMS_RecipientInfo *ri)
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359 | {
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360 | CMS_KeyTransRecipientInfo *ktri = ri->d.ktri;
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361 | EVP_PKEY *pkey = ktri->pkey;
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362 | unsigned char *ek = NULL;
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363 | size_t eklen;
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364 | int ret = 0;
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365 | CMS_EncryptedContentInfo *ec;
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366 | ec = cms->d.envelopedData->encryptedContentInfo;
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367 |
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368 | if (ktri->pkey == NULL) {
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369 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_NO_PRIVATE_KEY);
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370 | return 0;
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371 | }
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372 |
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373 | ktri->pctx = EVP_PKEY_CTX_new(pkey, NULL);
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374 | if (ktri->pctx == NULL)
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375 | return 0;
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376 |
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377 | if (EVP_PKEY_decrypt_init(ktri->pctx) <= 0)
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378 | goto err;
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379 |
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380 | if (!cms_env_asn1_ctrl(ri, 1))
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381 | goto err;
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382 |
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383 | if (EVP_PKEY_CTX_ctrl(ktri->pctx, -1, EVP_PKEY_OP_DECRYPT,
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384 | EVP_PKEY_CTRL_CMS_DECRYPT, 0, ri) <= 0) {
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385 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CTRL_ERROR);
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386 | goto err;
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387 | }
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388 |
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389 | if (EVP_PKEY_decrypt(ktri->pctx, NULL, &eklen,
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390 | ktri->encryptedKey->data,
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391 | ktri->encryptedKey->length) <= 0)
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392 | goto err;
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393 |
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394 | ek = OPENSSL_malloc(eklen);
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395 |
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396 | if (ek == NULL) {
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397 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, ERR_R_MALLOC_FAILURE);
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398 | goto err;
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399 | }
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400 |
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401 | if (EVP_PKEY_decrypt(ktri->pctx, ek, &eklen,
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402 | ktri->encryptedKey->data,
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403 | ktri->encryptedKey->length) <= 0) {
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404 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CMS_LIB);
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405 | goto err;
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406 | }
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407 |
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408 | ret = 1;
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409 |
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410 | OPENSSL_clear_free(ec->key, ec->keylen);
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411 | ec->key = ek;
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412 | ec->keylen = eklen;
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413 |
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414 | err:
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415 | EVP_PKEY_CTX_free(ktri->pctx);
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416 | ktri->pctx = NULL;
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417 | if (!ret)
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418 | OPENSSL_free(ek);
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419 |
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420 | return ret;
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421 | }
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422 |
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423 | /* Key Encrypted Key (KEK) RecipientInfo routines */
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424 |
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425 | int CMS_RecipientInfo_kekri_id_cmp(CMS_RecipientInfo *ri,
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426 | const unsigned char *id, size_t idlen)
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427 | {
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428 | ASN1_OCTET_STRING tmp_os;
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429 | CMS_KEKRecipientInfo *kekri;
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430 | if (ri->type != CMS_RECIPINFO_KEK) {
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431 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ID_CMP, CMS_R_NOT_KEK);
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432 | return -2;
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433 | }
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434 | kekri = ri->d.kekri;
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435 | tmp_os.type = V_ASN1_OCTET_STRING;
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436 | tmp_os.flags = 0;
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437 | tmp_os.data = (unsigned char *)id;
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438 | tmp_os.length = (int)idlen;
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439 | return ASN1_OCTET_STRING_cmp(&tmp_os, kekri->kekid->keyIdentifier);
|
---|
440 | }
|
---|
441 |
|
---|
442 | /* For now hard code AES key wrap info */
|
---|
443 |
|
---|
444 | static size_t aes_wrap_keylen(int nid)
|
---|
445 | {
|
---|
446 | switch (nid) {
|
---|
447 | case NID_id_aes128_wrap:
|
---|
448 | return 16;
|
---|
449 |
|
---|
450 | case NID_id_aes192_wrap:
|
---|
451 | return 24;
|
---|
452 |
|
---|
453 | case NID_id_aes256_wrap:
|
---|
454 | return 32;
|
---|
455 |
|
---|
456 | default:
|
---|
457 | return 0;
|
---|
458 | }
|
---|
459 | }
|
---|
460 |
|
---|
461 | CMS_RecipientInfo *CMS_add0_recipient_key(CMS_ContentInfo *cms, int nid,
|
---|
462 | unsigned char *key, size_t keylen,
|
---|
463 | unsigned char *id, size_t idlen,
|
---|
464 | ASN1_GENERALIZEDTIME *date,
|
---|
465 | ASN1_OBJECT *otherTypeId,
|
---|
466 | ASN1_TYPE *otherType)
|
---|
467 | {
|
---|
468 | CMS_RecipientInfo *ri = NULL;
|
---|
469 | CMS_EnvelopedData *env;
|
---|
470 | CMS_KEKRecipientInfo *kekri;
|
---|
471 | env = cms_get0_enveloped(cms);
|
---|
472 | if (!env)
|
---|
473 | goto err;
|
---|
474 |
|
---|
475 | if (nid == NID_undef) {
|
---|
476 | switch (keylen) {
|
---|
477 | case 16:
|
---|
478 | nid = NID_id_aes128_wrap;
|
---|
479 | break;
|
---|
480 |
|
---|
481 | case 24:
|
---|
482 | nid = NID_id_aes192_wrap;
|
---|
483 | break;
|
---|
484 |
|
---|
485 | case 32:
|
---|
486 | nid = NID_id_aes256_wrap;
|
---|
487 | break;
|
---|
488 |
|
---|
489 | default:
|
---|
490 | CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH);
|
---|
491 | goto err;
|
---|
492 | }
|
---|
493 |
|
---|
494 | } else {
|
---|
495 |
|
---|
496 | size_t exp_keylen = aes_wrap_keylen(nid);
|
---|
497 |
|
---|
498 | if (!exp_keylen) {
|
---|
499 | CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY,
|
---|
500 | CMS_R_UNSUPPORTED_KEK_ALGORITHM);
|
---|
501 | goto err;
|
---|
502 | }
|
---|
503 |
|
---|
504 | if (keylen != exp_keylen) {
|
---|
505 | CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH);
|
---|
506 | goto err;
|
---|
507 | }
|
---|
508 |
|
---|
509 | }
|
---|
510 |
|
---|
511 | /* Initialize recipient info */
|
---|
512 | ri = M_ASN1_new_of(CMS_RecipientInfo);
|
---|
513 | if (!ri)
|
---|
514 | goto merr;
|
---|
515 |
|
---|
516 | ri->d.kekri = M_ASN1_new_of(CMS_KEKRecipientInfo);
|
---|
517 | if (!ri->d.kekri)
|
---|
518 | goto merr;
|
---|
519 | ri->type = CMS_RECIPINFO_KEK;
|
---|
520 |
|
---|
521 | kekri = ri->d.kekri;
|
---|
522 |
|
---|
523 | if (otherTypeId) {
|
---|
524 | kekri->kekid->other = M_ASN1_new_of(CMS_OtherKeyAttribute);
|
---|
525 | if (kekri->kekid->other == NULL)
|
---|
526 | goto merr;
|
---|
527 | }
|
---|
528 |
|
---|
529 | if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
|
---|
530 | goto merr;
|
---|
531 |
|
---|
532 | /* After this point no calls can fail */
|
---|
533 |
|
---|
534 | kekri->version = 4;
|
---|
535 |
|
---|
536 | kekri->key = key;
|
---|
537 | kekri->keylen = keylen;
|
---|
538 |
|
---|
539 | ASN1_STRING_set0(kekri->kekid->keyIdentifier, id, idlen);
|
---|
540 |
|
---|
541 | kekri->kekid->date = date;
|
---|
542 |
|
---|
543 | if (kekri->kekid->other) {
|
---|
544 | kekri->kekid->other->keyAttrId = otherTypeId;
|
---|
545 | kekri->kekid->other->keyAttr = otherType;
|
---|
546 | }
|
---|
547 |
|
---|
548 | X509_ALGOR_set0(kekri->keyEncryptionAlgorithm,
|
---|
549 | OBJ_nid2obj(nid), V_ASN1_UNDEF, NULL);
|
---|
550 |
|
---|
551 | return ri;
|
---|
552 |
|
---|
553 | merr:
|
---|
554 | CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, ERR_R_MALLOC_FAILURE);
|
---|
555 | err:
|
---|
556 | M_ASN1_free_of(ri, CMS_RecipientInfo);
|
---|
557 | return NULL;
|
---|
558 |
|
---|
559 | }
|
---|
560 |
|
---|
561 | int CMS_RecipientInfo_kekri_get0_id(CMS_RecipientInfo *ri,
|
---|
562 | X509_ALGOR **palg,
|
---|
563 | ASN1_OCTET_STRING **pid,
|
---|
564 | ASN1_GENERALIZEDTIME **pdate,
|
---|
565 | ASN1_OBJECT **potherid,
|
---|
566 | ASN1_TYPE **pothertype)
|
---|
567 | {
|
---|
568 | CMS_KEKIdentifier *rkid;
|
---|
569 | if (ri->type != CMS_RECIPINFO_KEK) {
|
---|
570 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_GET0_ID, CMS_R_NOT_KEK);
|
---|
571 | return 0;
|
---|
572 | }
|
---|
573 | rkid = ri->d.kekri->kekid;
|
---|
574 | if (palg)
|
---|
575 | *palg = ri->d.kekri->keyEncryptionAlgorithm;
|
---|
576 | if (pid)
|
---|
577 | *pid = rkid->keyIdentifier;
|
---|
578 | if (pdate)
|
---|
579 | *pdate = rkid->date;
|
---|
580 | if (potherid) {
|
---|
581 | if (rkid->other)
|
---|
582 | *potherid = rkid->other->keyAttrId;
|
---|
583 | else
|
---|
584 | *potherid = NULL;
|
---|
585 | }
|
---|
586 | if (pothertype) {
|
---|
587 | if (rkid->other)
|
---|
588 | *pothertype = rkid->other->keyAttr;
|
---|
589 | else
|
---|
590 | *pothertype = NULL;
|
---|
591 | }
|
---|
592 | return 1;
|
---|
593 | }
|
---|
594 |
|
---|
595 | int CMS_RecipientInfo_set0_key(CMS_RecipientInfo *ri,
|
---|
596 | unsigned char *key, size_t keylen)
|
---|
597 | {
|
---|
598 | CMS_KEKRecipientInfo *kekri;
|
---|
599 | if (ri->type != CMS_RECIPINFO_KEK) {
|
---|
600 | CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_KEY, CMS_R_NOT_KEK);
|
---|
601 | return 0;
|
---|
602 | }
|
---|
603 |
|
---|
604 | kekri = ri->d.kekri;
|
---|
605 | kekri->key = key;
|
---|
606 | kekri->keylen = keylen;
|
---|
607 | return 1;
|
---|
608 | }
|
---|
609 |
|
---|
610 | /* Encrypt content key in KEK recipient info */
|
---|
611 |
|
---|
612 | static int cms_RecipientInfo_kekri_encrypt(CMS_ContentInfo *cms,
|
---|
613 | CMS_RecipientInfo *ri)
|
---|
614 | {
|
---|
615 | CMS_EncryptedContentInfo *ec;
|
---|
616 | CMS_KEKRecipientInfo *kekri;
|
---|
617 | AES_KEY actx;
|
---|
618 | unsigned char *wkey = NULL;
|
---|
619 | int wkeylen;
|
---|
620 | int r = 0;
|
---|
621 |
|
---|
622 | ec = cms->d.envelopedData->encryptedContentInfo;
|
---|
623 |
|
---|
624 | kekri = ri->d.kekri;
|
---|
625 |
|
---|
626 | if (!kekri->key) {
|
---|
627 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_NO_KEY);
|
---|
628 | return 0;
|
---|
629 | }
|
---|
630 |
|
---|
631 | if (AES_set_encrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
|
---|
632 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT,
|
---|
633 | CMS_R_ERROR_SETTING_KEY);
|
---|
634 | goto err;
|
---|
635 | }
|
---|
636 |
|
---|
637 | wkey = OPENSSL_malloc(ec->keylen + 8);
|
---|
638 |
|
---|
639 | if (wkey == NULL) {
|
---|
640 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, ERR_R_MALLOC_FAILURE);
|
---|
641 | goto err;
|
---|
642 | }
|
---|
643 |
|
---|
644 | wkeylen = AES_wrap_key(&actx, NULL, wkey, ec->key, ec->keylen);
|
---|
645 |
|
---|
646 | if (wkeylen <= 0) {
|
---|
647 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_WRAP_ERROR);
|
---|
648 | goto err;
|
---|
649 | }
|
---|
650 |
|
---|
651 | ASN1_STRING_set0(kekri->encryptedKey, wkey, wkeylen);
|
---|
652 |
|
---|
653 | r = 1;
|
---|
654 |
|
---|
655 | err:
|
---|
656 |
|
---|
657 | if (!r)
|
---|
658 | OPENSSL_free(wkey);
|
---|
659 | OPENSSL_cleanse(&actx, sizeof(actx));
|
---|
660 |
|
---|
661 | return r;
|
---|
662 |
|
---|
663 | }
|
---|
664 |
|
---|
665 | /* Decrypt content key in KEK recipient info */
|
---|
666 |
|
---|
667 | static int cms_RecipientInfo_kekri_decrypt(CMS_ContentInfo *cms,
|
---|
668 | CMS_RecipientInfo *ri)
|
---|
669 | {
|
---|
670 | CMS_EncryptedContentInfo *ec;
|
---|
671 | CMS_KEKRecipientInfo *kekri;
|
---|
672 | AES_KEY actx;
|
---|
673 | unsigned char *ukey = NULL;
|
---|
674 | int ukeylen;
|
---|
675 | int r = 0, wrap_nid;
|
---|
676 |
|
---|
677 | ec = cms->d.envelopedData->encryptedContentInfo;
|
---|
678 |
|
---|
679 | kekri = ri->d.kekri;
|
---|
680 |
|
---|
681 | if (!kekri->key) {
|
---|
682 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_NO_KEY);
|
---|
683 | return 0;
|
---|
684 | }
|
---|
685 |
|
---|
686 | wrap_nid = OBJ_obj2nid(kekri->keyEncryptionAlgorithm->algorithm);
|
---|
687 | if (aes_wrap_keylen(wrap_nid) != kekri->keylen) {
|
---|
688 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
|
---|
689 | CMS_R_INVALID_KEY_LENGTH);
|
---|
690 | return 0;
|
---|
691 | }
|
---|
692 |
|
---|
693 | /* If encrypted key length is invalid don't bother */
|
---|
694 |
|
---|
695 | if (kekri->encryptedKey->length < 16) {
|
---|
696 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
|
---|
697 | CMS_R_INVALID_ENCRYPTED_KEY_LENGTH);
|
---|
698 | goto err;
|
---|
699 | }
|
---|
700 |
|
---|
701 | if (AES_set_decrypt_key(kekri->key, kekri->keylen << 3, &actx)) {
|
---|
702 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT,
|
---|
703 | CMS_R_ERROR_SETTING_KEY);
|
---|
704 | goto err;
|
---|
705 | }
|
---|
706 |
|
---|
707 | ukey = OPENSSL_malloc(kekri->encryptedKey->length - 8);
|
---|
708 |
|
---|
709 | if (ukey == NULL) {
|
---|
710 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, ERR_R_MALLOC_FAILURE);
|
---|
711 | goto err;
|
---|
712 | }
|
---|
713 |
|
---|
714 | ukeylen = AES_unwrap_key(&actx, NULL, ukey,
|
---|
715 | kekri->encryptedKey->data,
|
---|
716 | kekri->encryptedKey->length);
|
---|
717 |
|
---|
718 | if (ukeylen <= 0) {
|
---|
719 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_UNWRAP_ERROR);
|
---|
720 | goto err;
|
---|
721 | }
|
---|
722 |
|
---|
723 | ec->key = ukey;
|
---|
724 | ec->keylen = ukeylen;
|
---|
725 |
|
---|
726 | r = 1;
|
---|
727 |
|
---|
728 | err:
|
---|
729 |
|
---|
730 | if (!r)
|
---|
731 | OPENSSL_free(ukey);
|
---|
732 | OPENSSL_cleanse(&actx, sizeof(actx));
|
---|
733 |
|
---|
734 | return r;
|
---|
735 |
|
---|
736 | }
|
---|
737 |
|
---|
738 | int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
|
---|
739 | {
|
---|
740 | switch (ri->type) {
|
---|
741 | case CMS_RECIPINFO_TRANS:
|
---|
742 | return cms_RecipientInfo_ktri_decrypt(cms, ri);
|
---|
743 |
|
---|
744 | case CMS_RECIPINFO_KEK:
|
---|
745 | return cms_RecipientInfo_kekri_decrypt(cms, ri);
|
---|
746 |
|
---|
747 | case CMS_RECIPINFO_PASS:
|
---|
748 | return cms_RecipientInfo_pwri_crypt(cms, ri, 0);
|
---|
749 |
|
---|
750 | default:
|
---|
751 | CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT,
|
---|
752 | CMS_R_UNSUPPORTED_RECPIENTINFO_TYPE);
|
---|
753 | return 0;
|
---|
754 | }
|
---|
755 | }
|
---|
756 |
|
---|
757 | int CMS_RecipientInfo_encrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
|
---|
758 | {
|
---|
759 | switch (ri->type) {
|
---|
760 | case CMS_RECIPINFO_TRANS:
|
---|
761 | return cms_RecipientInfo_ktri_encrypt(cms, ri);
|
---|
762 |
|
---|
763 | case CMS_RECIPINFO_AGREE:
|
---|
764 | return cms_RecipientInfo_kari_encrypt(cms, ri);
|
---|
765 |
|
---|
766 | case CMS_RECIPINFO_KEK:
|
---|
767 | return cms_RecipientInfo_kekri_encrypt(cms, ri);
|
---|
768 |
|
---|
769 | case CMS_RECIPINFO_PASS:
|
---|
770 | return cms_RecipientInfo_pwri_crypt(cms, ri, 1);
|
---|
771 |
|
---|
772 | default:
|
---|
773 | CMSerr(CMS_F_CMS_RECIPIENTINFO_ENCRYPT,
|
---|
774 | CMS_R_UNSUPPORTED_RECIPIENT_TYPE);
|
---|
775 | return 0;
|
---|
776 | }
|
---|
777 | }
|
---|
778 |
|
---|
779 | /* Check structures and fixup version numbers (if necessary) */
|
---|
780 |
|
---|
781 | static void cms_env_set_originfo_version(CMS_EnvelopedData *env)
|
---|
782 | {
|
---|
783 | CMS_OriginatorInfo *org = env->originatorInfo;
|
---|
784 | int i;
|
---|
785 | if (org == NULL)
|
---|
786 | return;
|
---|
787 | for (i = 0; i < sk_CMS_CertificateChoices_num(org->certificates); i++) {
|
---|
788 | CMS_CertificateChoices *cch;
|
---|
789 | cch = sk_CMS_CertificateChoices_value(org->certificates, i);
|
---|
790 | if (cch->type == CMS_CERTCHOICE_OTHER) {
|
---|
791 | env->version = 4;
|
---|
792 | return;
|
---|
793 | } else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
|
---|
794 | if (env->version < 3)
|
---|
795 | env->version = 3;
|
---|
796 | }
|
---|
797 | }
|
---|
798 |
|
---|
799 | for (i = 0; i < sk_CMS_RevocationInfoChoice_num(org->crls); i++) {
|
---|
800 | CMS_RevocationInfoChoice *rch;
|
---|
801 | rch = sk_CMS_RevocationInfoChoice_value(org->crls, i);
|
---|
802 | if (rch->type == CMS_REVCHOICE_OTHER) {
|
---|
803 | env->version = 4;
|
---|
804 | return;
|
---|
805 | }
|
---|
806 | }
|
---|
807 | }
|
---|
808 |
|
---|
809 | static void cms_env_set_version(CMS_EnvelopedData *env)
|
---|
810 | {
|
---|
811 | int i;
|
---|
812 | CMS_RecipientInfo *ri;
|
---|
813 |
|
---|
814 | /*
|
---|
815 | * Can't set version higher than 4 so if 4 or more already nothing to do.
|
---|
816 | */
|
---|
817 | if (env->version >= 4)
|
---|
818 | return;
|
---|
819 |
|
---|
820 | cms_env_set_originfo_version(env);
|
---|
821 |
|
---|
822 | if (env->version >= 3)
|
---|
823 | return;
|
---|
824 |
|
---|
825 | for (i = 0; i < sk_CMS_RecipientInfo_num(env->recipientInfos); i++) {
|
---|
826 | ri = sk_CMS_RecipientInfo_value(env->recipientInfos, i);
|
---|
827 | if (ri->type == CMS_RECIPINFO_PASS || ri->type == CMS_RECIPINFO_OTHER) {
|
---|
828 | env->version = 3;
|
---|
829 | return;
|
---|
830 | } else if (ri->type != CMS_RECIPINFO_TRANS
|
---|
831 | || ri->d.ktri->version != 0) {
|
---|
832 | env->version = 2;
|
---|
833 | }
|
---|
834 | }
|
---|
835 | if (env->originatorInfo || env->unprotectedAttrs)
|
---|
836 | env->version = 2;
|
---|
837 | if (env->version == 2)
|
---|
838 | return;
|
---|
839 | env->version = 0;
|
---|
840 | }
|
---|
841 |
|
---|
842 | BIO *cms_EnvelopedData_init_bio(CMS_ContentInfo *cms)
|
---|
843 | {
|
---|
844 | CMS_EncryptedContentInfo *ec;
|
---|
845 | STACK_OF(CMS_RecipientInfo) *rinfos;
|
---|
846 | CMS_RecipientInfo *ri;
|
---|
847 | int i, ok = 0;
|
---|
848 | BIO *ret;
|
---|
849 |
|
---|
850 | /* Get BIO first to set up key */
|
---|
851 |
|
---|
852 | ec = cms->d.envelopedData->encryptedContentInfo;
|
---|
853 | ret = cms_EncryptedContent_init_bio(ec);
|
---|
854 |
|
---|
855 | /* If error or no cipher end of processing */
|
---|
856 |
|
---|
857 | if (!ret || !ec->cipher)
|
---|
858 | return ret;
|
---|
859 |
|
---|
860 | /* Now encrypt content key according to each RecipientInfo type */
|
---|
861 |
|
---|
862 | rinfos = cms->d.envelopedData->recipientInfos;
|
---|
863 |
|
---|
864 | for (i = 0; i < sk_CMS_RecipientInfo_num(rinfos); i++) {
|
---|
865 | ri = sk_CMS_RecipientInfo_value(rinfos, i);
|
---|
866 | if (CMS_RecipientInfo_encrypt(cms, ri) <= 0) {
|
---|
867 | CMSerr(CMS_F_CMS_ENVELOPEDDATA_INIT_BIO,
|
---|
868 | CMS_R_ERROR_SETTING_RECIPIENTINFO);
|
---|
869 | goto err;
|
---|
870 | }
|
---|
871 | }
|
---|
872 | cms_env_set_version(cms->d.envelopedData);
|
---|
873 |
|
---|
874 | ok = 1;
|
---|
875 |
|
---|
876 | err:
|
---|
877 | ec->cipher = NULL;
|
---|
878 | OPENSSL_clear_free(ec->key, ec->keylen);
|
---|
879 | ec->key = NULL;
|
---|
880 | ec->keylen = 0;
|
---|
881 | if (ok)
|
---|
882 | return ret;
|
---|
883 | BIO_free(ret);
|
---|
884 | return NULL;
|
---|
885 |
|
---|
886 | }
|
---|
887 |
|
---|
888 | /*
|
---|
889 | * Get RecipientInfo type (if any) supported by a key (public or private). To
|
---|
890 | * retain compatibility with previous behaviour if the ctrl value isn't
|
---|
891 | * supported we assume key transport.
|
---|
892 | */
|
---|
893 | int cms_pkey_get_ri_type(EVP_PKEY *pk)
|
---|
894 | {
|
---|
895 | if (pk->ameth && pk->ameth->pkey_ctrl) {
|
---|
896 | int i, r;
|
---|
897 | i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_RI_TYPE, 0, &r);
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898 | if (i > 0)
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899 | return r;
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900 | }
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901 | return CMS_RECIPINFO_TRANS;
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902 | }
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