1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/nss/lib/smime/cmsdigdata.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,210 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +/*
1.9 + * CMS digestedData methods.
1.10 + */
1.11 +
1.12 +#include "cmslocal.h"
1.13 +
1.14 +#include "secitem.h"
1.15 +#include "secasn1.h"
1.16 +#include "secoid.h"
1.17 +#include "secerr.h"
1.18 +
1.19 +/*
1.20 + * NSS_CMSDigestedData_Create - create a digestedData object (presumably for encoding)
1.21 + *
1.22 + * version will be set by NSS_CMSDigestedData_Encode_BeforeStart
1.23 + * digestAlg is passed as parameter
1.24 + * contentInfo must be filled by the user
1.25 + * digest will be calculated while encoding
1.26 + */
1.27 +NSSCMSDigestedData *
1.28 +NSS_CMSDigestedData_Create(NSSCMSMessage *cmsg, SECAlgorithmID *digestalg)
1.29 +{
1.30 + void *mark;
1.31 + NSSCMSDigestedData *digd;
1.32 + PLArenaPool *poolp;
1.33 +
1.34 + poolp = cmsg->poolp;
1.35 +
1.36 + mark = PORT_ArenaMark(poolp);
1.37 +
1.38 + digd = (NSSCMSDigestedData *)PORT_ArenaZAlloc(poolp, sizeof(NSSCMSDigestedData));
1.39 + if (digd == NULL)
1.40 + goto loser;
1.41 +
1.42 + digd->cmsg = cmsg;
1.43 +
1.44 + if (SECOID_CopyAlgorithmID (poolp, &(digd->digestAlg), digestalg) != SECSuccess)
1.45 + goto loser;
1.46 +
1.47 + PORT_ArenaUnmark(poolp, mark);
1.48 + return digd;
1.49 +
1.50 +loser:
1.51 + PORT_ArenaRelease(poolp, mark);
1.52 + return NULL;
1.53 +}
1.54 +
1.55 +/*
1.56 + * NSS_CMSDigestedData_Destroy - destroy a digestedData object
1.57 + */
1.58 +void
1.59 +NSS_CMSDigestedData_Destroy(NSSCMSDigestedData *digd)
1.60 +{
1.61 + /* everything's in a pool, so don't worry about the storage */
1.62 + NSS_CMSContentInfo_Destroy(&(digd->contentInfo));
1.63 + return;
1.64 +}
1.65 +
1.66 +/*
1.67 + * NSS_CMSDigestedData_GetContentInfo - return pointer to digestedData object's contentInfo
1.68 + */
1.69 +NSSCMSContentInfo *
1.70 +NSS_CMSDigestedData_GetContentInfo(NSSCMSDigestedData *digd)
1.71 +{
1.72 + return &(digd->contentInfo);
1.73 +}
1.74 +
1.75 +/*
1.76 + * NSS_CMSDigestedData_Encode_BeforeStart - do all the necessary things to a DigestedData
1.77 + * before encoding begins.
1.78 + *
1.79 + * In particular:
1.80 + * - set the right version number. The contentInfo's content type must be set up already.
1.81 + */
1.82 +SECStatus
1.83 +NSS_CMSDigestedData_Encode_BeforeStart(NSSCMSDigestedData *digd)
1.84 +{
1.85 + unsigned long version;
1.86 + SECItem *dummy;
1.87 +
1.88 + version = NSS_CMS_DIGESTED_DATA_VERSION_DATA;
1.89 + if (!NSS_CMSType_IsData(NSS_CMSContentInfo_GetContentTypeTag(
1.90 + &(digd->contentInfo))))
1.91 + version = NSS_CMS_DIGESTED_DATA_VERSION_ENCAP;
1.92 +
1.93 + dummy = SEC_ASN1EncodeInteger(digd->cmsg->poolp, &(digd->version), version);
1.94 + return (dummy == NULL) ? SECFailure : SECSuccess;
1.95 +}
1.96 +
1.97 +/*
1.98 + * NSS_CMSDigestedData_Encode_BeforeData - do all the necessary things to a DigestedData
1.99 + * before the encapsulated data is passed through the encoder.
1.100 + *
1.101 + * In detail:
1.102 + * - set up the digests if necessary
1.103 + */
1.104 +SECStatus
1.105 +NSS_CMSDigestedData_Encode_BeforeData(NSSCMSDigestedData *digd)
1.106 +{
1.107 + SECStatus rv =NSS_CMSContentInfo_Private_Init(&digd->contentInfo);
1.108 + if (rv != SECSuccess) {
1.109 + return SECFailure;
1.110 + }
1.111 +
1.112 + /* set up the digests */
1.113 + if (digd->digestAlg.algorithm.len != 0 && digd->digest.len == 0) {
1.114 + /* if digest is already there, do nothing */
1.115 + digd->contentInfo.privateInfo->digcx = NSS_CMSDigestContext_StartSingle(&(digd->digestAlg));
1.116 + if (digd->contentInfo.privateInfo->digcx == NULL)
1.117 + return SECFailure;
1.118 + }
1.119 + return SECSuccess;
1.120 +}
1.121 +
1.122 +/*
1.123 + * NSS_CMSDigestedData_Encode_AfterData - do all the necessary things to a DigestedData
1.124 + * after all the encapsulated data was passed through the encoder.
1.125 + *
1.126 + * In detail:
1.127 + * - finish the digests
1.128 + */
1.129 +SECStatus
1.130 +NSS_CMSDigestedData_Encode_AfterData(NSSCMSDigestedData *digd)
1.131 +{
1.132 + SECStatus rv = SECSuccess;
1.133 + /* did we have digest calculation going on? */
1.134 + if (digd->contentInfo.privateInfo && digd->contentInfo.privateInfo->digcx) {
1.135 + rv = NSS_CMSDigestContext_FinishSingle(digd->contentInfo.privateInfo->digcx,
1.136 + digd->cmsg->poolp,
1.137 + &(digd->digest));
1.138 + /* error has been set by NSS_CMSDigestContext_FinishSingle */
1.139 + digd->contentInfo.privateInfo->digcx = NULL;
1.140 + }
1.141 +
1.142 + return rv;
1.143 +}
1.144 +
1.145 +/*
1.146 + * NSS_CMSDigestedData_Decode_BeforeData - do all the necessary things to a DigestedData
1.147 + * before the encapsulated data is passed through the encoder.
1.148 + *
1.149 + * In detail:
1.150 + * - set up the digests if necessary
1.151 + */
1.152 +SECStatus
1.153 +NSS_CMSDigestedData_Decode_BeforeData(NSSCMSDigestedData *digd)
1.154 +{
1.155 + SECStatus rv;
1.156 +
1.157 + /* is there a digest algorithm yet? */
1.158 + if (digd->digestAlg.algorithm.len == 0)
1.159 + return SECFailure;
1.160 +
1.161 + rv = NSS_CMSContentInfo_Private_Init(&digd->contentInfo);
1.162 + if (rv != SECSuccess) {
1.163 + return SECFailure;
1.164 + }
1.165 +
1.166 + digd->contentInfo.privateInfo->digcx = NSS_CMSDigestContext_StartSingle(&(digd->digestAlg));
1.167 + if (digd->contentInfo.privateInfo->digcx == NULL)
1.168 + return SECFailure;
1.169 +
1.170 + return SECSuccess;
1.171 +}
1.172 +
1.173 +/*
1.174 + * NSS_CMSDigestedData_Decode_AfterData - do all the necessary things to a DigestedData
1.175 + * after all the encapsulated data was passed through the encoder.
1.176 + *
1.177 + * In detail:
1.178 + * - finish the digests
1.179 + */
1.180 +SECStatus
1.181 +NSS_CMSDigestedData_Decode_AfterData(NSSCMSDigestedData *digd)
1.182 +{
1.183 + SECStatus rv = SECSuccess;
1.184 + /* did we have digest calculation going on? */
1.185 + if (digd->contentInfo.privateInfo && digd->contentInfo.privateInfo->digcx) {
1.186 + rv = NSS_CMSDigestContext_FinishSingle(digd->contentInfo.privateInfo->digcx,
1.187 + digd->cmsg->poolp,
1.188 + &(digd->cdigest));
1.189 + /* error has been set by NSS_CMSDigestContext_FinishSingle */
1.190 + digd->contentInfo.privateInfo->digcx = NULL;
1.191 + }
1.192 +
1.193 + return rv;
1.194 +}
1.195 +
1.196 +/*
1.197 + * NSS_CMSDigestedData_Decode_AfterEnd - finalize a digestedData.
1.198 + *
1.199 + * In detail:
1.200 + * - check the digests for equality
1.201 + */
1.202 +SECStatus
1.203 +NSS_CMSDigestedData_Decode_AfterEnd(NSSCMSDigestedData *digd)
1.204 +{
1.205 + /* did we have digest calculation going on? */
1.206 + if (digd->cdigest.len != 0) {
1.207 + /* XXX comparision btw digest & cdigest */
1.208 + /* XXX set status */
1.209 + /* TODO!!!! */
1.210 + }
1.211 +
1.212 + return SECSuccess;
1.213 +}
