1/* 2 * The contents of this file are subject to the Mozilla Public 3 * License Version 1.1 (the "License"); you may not use this file 4 * except in compliance with the License. You may obtain a copy of 5 * the License at http://www.mozilla.org/MPL/ 6 * 7 * Software distributed under the License is distributed on an "AS 8 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or 9 * implied. See the License for the specific language governing 10 * rights and limitations under the License. 11 * 12 * The Original Code is the Netscape security libraries. 13 * 14 * The Initial Developer of the Original Code is Netscape 15 * Communications Corporation. Portions created by Netscape are 16 * Copyright (C) 1994-2000 Netscape Communications Corporation. All 17 * Rights Reserved. 18 * 19 * Contributor(s): 20 * 21 * Alternatively, the contents of this file may be used under the 22 * terms of the GNU General Public License Version 2 or later (the 23 * "GPL"), in which case the provisions of the GPL are applicable 24 * instead of those above. If you wish to allow use of your 25 * version of this file only under the terms of the GPL and not to 26 * allow others to use your version of this file under the MPL, 27 * indicate your decision by deleting the provisions above and 28 * replace them with the notice and other provisions required by 29 * the GPL. If you do not delete the provisions above, a recipient 30 * may use your version of this file under either the MPL or the 31 * GPL. 32 */ 33 34/* 35 * CMS digestedData methods. 36 */ 37 38#include <Security/SecCmsDigestedData.h> 39 40#include <Security/SecCmsContentInfo.h> 41#include <Security/SecCmsDigestContext.h> 42 43#include "cmslocal.h" 44 45#include "SecAsn1Item.h" 46#include "secoid.h" 47 48#include <security_asn1/secasn1.h> 49#include <security_asn1/secerr.h> 50#include <security_asn1/secport.h> 51 52/* 53 * SecCmsDigestedDataCreate - create a digestedData object (presumably for encoding) 54 * 55 * version will be set by SecCmsDigestedDataEncodeBeforeStart 56 * digestAlg is passed as parameter 57 * contentInfo must be filled by the user 58 * digest will be calculated while encoding 59 */ 60SecCmsDigestedDataRef 61SecCmsDigestedDataCreate(SecCmsMessageRef cmsg, SECAlgorithmID *digestalg) 62{ 63 void *mark; 64 SecCmsDigestedDataRef digd; 65 PLArenaPool *poolp; 66 67 poolp = cmsg->poolp; 68 69 mark = PORT_ArenaMark(poolp); 70 71 digd = (SecCmsDigestedDataRef)PORT_ArenaZAlloc(poolp, sizeof(SecCmsDigestedData)); 72 if (digd == NULL) 73 goto loser; 74 75 digd->contentInfo.cmsg = cmsg; 76 77 if (SECOID_CopyAlgorithmID (poolp, &(digd->digestAlg), digestalg) != SECSuccess) 78 goto loser; 79 80 PORT_ArenaUnmark(poolp, mark); 81 return digd; 82 83loser: 84 PORT_ArenaRelease(poolp, mark); 85 return NULL; 86} 87 88/* 89 * SecCmsDigestedDataDestroy - destroy a digestedData object 90 */ 91void 92SecCmsDigestedDataDestroy(SecCmsDigestedDataRef digd) 93{ 94 /* everything's in a pool, so don't worry about the storage */ 95 SecCmsContentInfoDestroy(&(digd->contentInfo)); 96 return; 97} 98 99/* 100 * SecCmsDigestedDataGetContentInfo - return pointer to digestedData object's contentInfo 101 */ 102SecCmsContentInfoRef 103SecCmsDigestedDataGetContentInfo(SecCmsDigestedDataRef digd) 104{ 105 return &(digd->contentInfo); 106} 107 108/* 109 * SecCmsDigestedDataEncodeBeforeStart - do all the necessary things to a DigestedData 110 * before encoding begins. 111 * 112 * In particular: 113 * - set the right version number. The contentInfo's content type must be set up already. 114 */ 115OSStatus 116SecCmsDigestedDataEncodeBeforeStart(SecCmsDigestedDataRef digd) 117{ 118 unsigned long version; 119 SecAsn1Item * dummy; 120 121 version = SEC_CMS_DIGESTED_DATA_VERSION_DATA; 122 if (SecCmsContentInfoGetContentTypeTag(&(digd->contentInfo)) != SEC_OID_PKCS7_DATA) 123 version = SEC_CMS_DIGESTED_DATA_VERSION_ENCAP; 124 125 dummy = SEC_ASN1EncodeInteger(digd->contentInfo.cmsg->poolp, &(digd->version), version); 126 return (dummy == NULL) ? SECFailure : SECSuccess; 127} 128 129/* 130 * SecCmsDigestedDataEncodeBeforeData - do all the necessary things to a DigestedData 131 * before the encapsulated data is passed through the encoder. 132 * 133 * In detail: 134 * - set up the digests if necessary 135 */ 136OSStatus 137SecCmsDigestedDataEncodeBeforeData(SecCmsDigestedDataRef digd) 138{ 139 /* set up the digests */ 140 if (digd->digestAlg.algorithm.Length != 0 && digd->digest.Length == 0) { 141 /* if digest is already there, do nothing */ 142 digd->contentInfo.digcx = SecCmsDigestContextStartSingle(&(digd->digestAlg)); 143 if (digd->contentInfo.digcx == NULL) 144 return SECFailure; 145 } 146 return SECSuccess; 147} 148 149/* 150 * SecCmsDigestedDataEncodeAfterData - do all the necessary things to a DigestedData 151 * after all the encapsulated data was passed through the encoder. 152 * 153 * In detail: 154 * - finish the digests 155 */ 156OSStatus 157SecCmsDigestedDataEncodeAfterData(SecCmsDigestedDataRef digd) 158{ 159 OSStatus rv = SECSuccess; 160 /* did we have digest calculation going on? */ 161 if (digd->contentInfo.digcx) { 162 SecAsn1Item data; 163 rv = SecCmsDigestContextFinishSingle(digd->contentInfo.digcx, &data); 164 if (rv == SECSuccess) 165 rv = SECITEM_CopyItem(digd->contentInfo.cmsg->poolp, &(digd->digest), &data); 166 if (rv == SECSuccess) 167 SecCmsDigestContextDestroy(digd->contentInfo.digcx); 168 digd->contentInfo.digcx = NULL; 169 } 170 171 return rv; 172} 173 174/* 175 * SecCmsDigestedDataDecodeBeforeData - do all the necessary things to a DigestedData 176 * before the encapsulated data is passed through the encoder. 177 * 178 * In detail: 179 * - set up the digests if necessary 180 */ 181OSStatus 182SecCmsDigestedDataDecodeBeforeData(SecCmsDigestedDataRef digd) 183{ 184 /* is there a digest algorithm yet? */ 185 if (digd->digestAlg.algorithm.Length == 0) 186 return SECFailure; 187 188 digd->contentInfo.digcx = SecCmsDigestContextStartSingle(&(digd->digestAlg)); 189 if (digd->contentInfo.digcx == NULL) 190 return SECFailure; 191 192 return SECSuccess; 193} 194 195/* 196 * SecCmsDigestedDataDecodeAfterData - do all the necessary things to a DigestedData 197 * after all the encapsulated data was passed through the encoder. 198 * 199 * In detail: 200 * - finish the digests 201 */ 202OSStatus 203SecCmsDigestedDataDecodeAfterData(SecCmsDigestedDataRef digd) 204{ 205 OSStatus rv = SECSuccess; 206 /* did we have digest calculation going on? */ 207 if (digd->contentInfo.digcx) { 208 SecAsn1Item data; 209 rv = SecCmsDigestContextFinishSingle(digd->contentInfo.digcx, &data); 210 if (rv == SECSuccess) 211 rv = SECITEM_CopyItem(digd->contentInfo.cmsg->poolp, &(digd->digest), &data); 212 if (rv == SECSuccess) 213 SecCmsDigestContextDestroy(digd->contentInfo.digcx); 214 digd->contentInfo.digcx = NULL; 215 } 216 217 return rv; 218} 219 220/* 221 * SecCmsDigestedDataDecodeAfterEnd - finalize a digestedData. 222 * 223 * In detail: 224 * - check the digests for equality 225 */ 226OSStatus 227SecCmsDigestedDataDecodeAfterEnd(SecCmsDigestedDataRef digd) 228{ 229 /* did we have digest calculation going on? */ 230 if (digd->cdigest.Length != 0) { 231 /* XXX comparision btw digest & cdigest */ 232 /* XXX set status */ 233 /* TODO!!!! */ 234 } 235 236 return SECSuccess; 237} 238