diff options
Diffstat (limited to 'security/nss/lib/smime/cmsdigdata.c')
| -rw-r--r-- | security/nss/lib/smime/cmsdigdata.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/security/nss/lib/smime/cmsdigdata.c b/security/nss/lib/smime/cmsdigdata.c new file mode 100644 index 000000000..9ea22702e --- /dev/null +++ b/security/nss/lib/smime/cmsdigdata.c @@ -0,0 +1,210 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* + * CMS digestedData methods. + */ + +#include "cmslocal.h" + +#include "secitem.h" +#include "secasn1.h" +#include "secoid.h" +#include "secerr.h" + +/* + * NSS_CMSDigestedData_Create - create a digestedData object (presumably for encoding) + * + * version will be set by NSS_CMSDigestedData_Encode_BeforeStart + * digestAlg is passed as parameter + * contentInfo must be filled by the user + * digest will be calculated while encoding + */ +NSSCMSDigestedData * +NSS_CMSDigestedData_Create(NSSCMSMessage *cmsg, SECAlgorithmID *digestalg) +{ + void *mark; + NSSCMSDigestedData *digd; + PLArenaPool *poolp; + + poolp = cmsg->poolp; + + mark = PORT_ArenaMark(poolp); + + digd = (NSSCMSDigestedData *)PORT_ArenaZAlloc(poolp, sizeof(NSSCMSDigestedData)); + if (digd == NULL) + goto loser; + + digd->cmsg = cmsg; + + if (SECOID_CopyAlgorithmID(poolp, &(digd->digestAlg), digestalg) != SECSuccess) + goto loser; + + PORT_ArenaUnmark(poolp, mark); + return digd; + +loser: + PORT_ArenaRelease(poolp, mark); + return NULL; +} + +/* + * NSS_CMSDigestedData_Destroy - destroy a digestedData object + */ +void +NSS_CMSDigestedData_Destroy(NSSCMSDigestedData *digd) +{ + /* everything's in a pool, so don't worry about the storage */ + NSS_CMSContentInfo_Destroy(&(digd->contentInfo)); + return; +} + +/* + * NSS_CMSDigestedData_GetContentInfo - return pointer to digestedData object's contentInfo + */ +NSSCMSContentInfo * +NSS_CMSDigestedData_GetContentInfo(NSSCMSDigestedData *digd) +{ + return &(digd->contentInfo); +} + +/* + * NSS_CMSDigestedData_Encode_BeforeStart - do all the necessary things to a DigestedData + * before encoding begins. + * + * In particular: + * - set the right version number. The contentInfo's content type must be set up already. + */ +SECStatus +NSS_CMSDigestedData_Encode_BeforeStart(NSSCMSDigestedData *digd) +{ + unsigned long version; + SECItem *dummy; + + version = NSS_CMS_DIGESTED_DATA_VERSION_DATA; + if (!NSS_CMSType_IsData(NSS_CMSContentInfo_GetContentTypeTag( + &(digd->contentInfo)))) + version = NSS_CMS_DIGESTED_DATA_VERSION_ENCAP; + + dummy = SEC_ASN1EncodeInteger(digd->cmsg->poolp, &(digd->version), version); + return (dummy == NULL) ? SECFailure : SECSuccess; +} + +/* + * NSS_CMSDigestedData_Encode_BeforeData - do all the necessary things to a DigestedData + * before the encapsulated data is passed through the encoder. + * + * In detail: + * - set up the digests if necessary + */ +SECStatus +NSS_CMSDigestedData_Encode_BeforeData(NSSCMSDigestedData *digd) +{ + SECStatus rv = NSS_CMSContentInfo_Private_Init(&digd->contentInfo); + if (rv != SECSuccess) { + return SECFailure; + } + + /* set up the digests */ + if (digd->digestAlg.algorithm.len != 0 && digd->digest.len == 0) { + /* if digest is already there, do nothing */ + digd->contentInfo.privateInfo->digcx = NSS_CMSDigestContext_StartSingle(&(digd->digestAlg)); + if (digd->contentInfo.privateInfo->digcx == NULL) + return SECFailure; + } + return SECSuccess; +} + +/* + * NSS_CMSDigestedData_Encode_AfterData - do all the necessary things to a DigestedData + * after all the encapsulated data was passed through the encoder. + * + * In detail: + * - finish the digests + */ +SECStatus +NSS_CMSDigestedData_Encode_AfterData(NSSCMSDigestedData *digd) +{ + SECStatus rv = SECSuccess; + /* did we have digest calculation going on? */ + if (digd->contentInfo.privateInfo && digd->contentInfo.privateInfo->digcx) { + rv = NSS_CMSDigestContext_FinishSingle(digd->contentInfo.privateInfo->digcx, + digd->cmsg->poolp, + &(digd->digest)); + /* error has been set by NSS_CMSDigestContext_FinishSingle */ + digd->contentInfo.privateInfo->digcx = NULL; + } + + return rv; +} + +/* + * NSS_CMSDigestedData_Decode_BeforeData - do all the necessary things to a DigestedData + * before the encapsulated data is passed through the encoder. + * + * In detail: + * - set up the digests if necessary + */ +SECStatus +NSS_CMSDigestedData_Decode_BeforeData(NSSCMSDigestedData *digd) +{ + SECStatus rv; + + /* is there a digest algorithm yet? */ + if (digd->digestAlg.algorithm.len == 0) + return SECFailure; + + rv = NSS_CMSContentInfo_Private_Init(&digd->contentInfo); + if (rv != SECSuccess) { + return SECFailure; + } + + digd->contentInfo.privateInfo->digcx = NSS_CMSDigestContext_StartSingle(&(digd->digestAlg)); + if (digd->contentInfo.privateInfo->digcx == NULL) + return SECFailure; + + return SECSuccess; +} + +/* + * NSS_CMSDigestedData_Decode_AfterData - do all the necessary things to a DigestedData + * after all the encapsulated data was passed through the encoder. + * + * In detail: + * - finish the digests + */ +SECStatus +NSS_CMSDigestedData_Decode_AfterData(NSSCMSDigestedData *digd) +{ + SECStatus rv = SECSuccess; + /* did we have digest calculation going on? */ + if (digd->contentInfo.privateInfo && digd->contentInfo.privateInfo->digcx) { + rv = NSS_CMSDigestContext_FinishSingle(digd->contentInfo.privateInfo->digcx, + digd->cmsg->poolp, + &(digd->cdigest)); + /* error has been set by NSS_CMSDigestContext_FinishSingle */ + digd->contentInfo.privateInfo->digcx = NULL; + } + + return rv; +} + +/* + * NSS_CMSDigestedData_Decode_AfterEnd - finalize a digestedData. + * + * In detail: + * - check the digests for equality + */ +SECStatus +NSS_CMSDigestedData_Decode_AfterEnd(NSSCMSDigestedData *digd) +{ + /* did we have digest calculation going on? */ + if (digd->cdigest.len != 0) { + /* XXX comparision btw digest & cdigest */ + /* XXX set status */ + /* TODO!!!! */ + } + + return SECSuccess; +} |