SECStatus NSS_CMSSignedData_SetDigestValue(NSSCMSSignedData *sigd, SECOidTag digestalgtag, SECItem *digestdata) { SECItem *digest = NULL; PLArenaPool *poolp; void *mark; int n, cnt; if (!sigd) { PORT_SetError(SEC_ERROR_INVALID_ARGS); return SECFailure; } poolp = sigd->cmsg->poolp; mark = PORT_ArenaMark(poolp); if (digestdata) { digest = (SECItem *) PORT_ArenaZAlloc(poolp,sizeof(SECItem)); /* copy digestdata item to arena (in case we have it and are not only making room) */ if (SECITEM_CopyItem(poolp, digest, digestdata) != SECSuccess) goto loser; } /* now allocate one (same size as digestAlgorithms) */ if (sigd->digests == NULL) { cnt = NSS_CMSArray_Count((void **)sigd->digestAlgorithms); sigd->digests = PORT_ArenaZAlloc(sigd->cmsg->poolp, (cnt + 1) * sizeof(SECItem *)); if (sigd->digests == NULL) { PORT_SetError(SEC_ERROR_NO_MEMORY); return SECFailure; } } n = -1; if (sigd->digestAlgorithms != NULL) n = NSS_CMSAlgArray_GetIndexByAlgTag(sigd->digestAlgorithms, digestalgtag); /* if not found, add a digest */ if (n < 0) { if (NSS_CMSSignedData_AddDigest(poolp, sigd, digestalgtag, digest) != SECSuccess) goto loser; } else { /* replace NULL pointer with digest item (and leak previous value) */ sigd->digests[n] = digest; } PORT_ArenaUnmark(poolp, mark); return SECSuccess; loser: PORT_ArenaRelease(poolp, mark); return SECFailure; }
/* XXX This function doesn't set the error code on failure. */ SECItem * NSS_CMSSignedData_GetDigestValue(NSSCMSSignedData *sigd, SECOidTag digestalgtag) { int n; if (!sigd) { PORT_SetError(SEC_ERROR_INVALID_ARGS); return NULL; } if (sigd->digestAlgorithms == NULL || sigd->digests == NULL) { PORT_SetError(SEC_ERROR_DIGEST_NOT_FOUND); return NULL; } n = NSS_CMSAlgArray_GetIndexByAlgTag(sigd->digestAlgorithms, digestalgtag); return (n < 0) ? NULL : sigd->digests[n]; }
/* * NSS_CMSSignedData_Encode_AfterData - do all the necessary things to a SignedData * after all the encapsulated data was passed through the encoder. * * In detail: * - create the signatures in all the SignerInfos * * Please note that nothing is done to the Certificates and CRLs in the message - this * is entirely the responsibility of our callers. */ SECStatus NSS_CMSSignedData_Encode_AfterData(NSSCMSSignedData *sigd) { NSSCMSSignerInfo **signerinfos, *signerinfo; NSSCMSContentInfo *cinfo; SECOidTag digestalgtag; SECStatus ret = SECFailure; SECStatus rv; SECItem *contentType; int certcount; int i, ci, cli, n, rci, si; PLArenaPool *poolp; CERTCertificateList *certlist; extern const SEC_ASN1Template NSSCMSSignerInfoTemplate[]; if (!sigd) { PORT_SetError(SEC_ERROR_INVALID_ARGS); return SECFailure; } poolp = sigd->cmsg->poolp; cinfo = &(sigd->contentInfo); /* did we have digest calculation going on? */ if (cinfo->privateInfo && cinfo->privateInfo->digcx) { rv = NSS_CMSDigestContext_FinishMultiple(cinfo->privateInfo->digcx, poolp, &(sigd->digests)); /* error has been set by NSS_CMSDigestContext_FinishMultiple */ cinfo->privateInfo->digcx = NULL; if (rv != SECSuccess) goto loser; } signerinfos = sigd->signerInfos; certcount = 0; /* prepare all the SignerInfos (there may be none) */ for (i = 0; i < NSS_CMSSignedData_SignerInfoCount(sigd); i++) { signerinfo = NSS_CMSSignedData_GetSignerInfo(sigd, i); /* find correct digest for this signerinfo */ digestalgtag = NSS_CMSSignerInfo_GetDigestAlgTag(signerinfo); n = NSS_CMSAlgArray_GetIndexByAlgTag(sigd->digestAlgorithms, digestalgtag); if (n < 0 || sigd->digests == NULL || sigd->digests[n] == NULL) { /* oops - digest not found */ PORT_SetError(SEC_ERROR_DIGEST_NOT_FOUND); goto loser; } /* XXX if our content is anything else but data, we need to force the * presence of signed attributes (RFC2630 5.3 "signedAttributes is a * collection...") */ /* pass contentType here as we want a contentType attribute */ if ((contentType = NSS_CMSContentInfo_GetContentTypeOID(cinfo)) == NULL) goto loser; /* sign the thing */ rv = NSS_CMSSignerInfo_Sign(signerinfo, sigd->digests[n], contentType); if (rv != SECSuccess) goto loser; /* while we're at it, count number of certs in certLists */ certlist = NSS_CMSSignerInfo_GetCertList(signerinfo); if (certlist) certcount += certlist->len; } /* this is a SET OF, so we need to sort them guys */ rv = NSS_CMSArray_SortByDER((void **)signerinfos, NSSCMSSignerInfoTemplate, NULL); if (rv != SECSuccess) goto loser; /* * now prepare certs & crls */ /* count the rest of the certs */ if (sigd->certs != NULL) { for (ci = 0; sigd->certs[ci] != NULL; ci++) certcount++; } if (sigd->certLists != NULL) { for (cli = 0; sigd->certLists[cli] != NULL; cli++) certcount += sigd->certLists[cli]->len; } if (certcount == 0) { sigd->rawCerts = NULL; } else { /* * Combine all of the certs and cert chains into rawcerts. * Note: certcount is an upper bound; we may not need that many slots * but we will allocate anyway to avoid having to do another pass. * (The temporary space saving is not worth it.) * * XXX ARGH - this NEEDS to be fixed. need to come up with a decent * SetOfDERcertficates implementation */ sigd->rawCerts = (SECItem **)PORT_ArenaAlloc(poolp, (certcount + 1) * sizeof(SECItem *)); if (sigd->rawCerts == NULL) return SECFailure; /* * XXX Want to check for duplicates and not add *any* cert that is * already in the set. This will be more important when we start * dealing with larger sets of certs, dual-key certs (signing and * encryption), etc. For the time being we can slide by... * * XXX ARGH - this NEEDS to be fixed. need to come up with a decent * SetOfDERcertficates implementation */ rci = 0; if (signerinfos != NULL) { for (si = 0; signerinfos[si] != NULL; si++) { signerinfo = signerinfos[si]; for (ci = 0; ci < signerinfo->certList->len; ci++) sigd->rawCerts[rci++] = &(signerinfo->certList->certs[ci]); } } if (sigd->certs != NULL) { for (ci = 0; sigd->certs[ci] != NULL; ci++) sigd->rawCerts[rci++] = &(sigd->certs[ci]->derCert); } if (sigd->certLists != NULL) { for (cli = 0; sigd->certLists[cli] != NULL; cli++) { for (ci = 0; ci < sigd->certLists[cli]->len; ci++) sigd->rawCerts[rci++] = &(sigd->certLists[cli]->certs[ci]); } } sigd->rawCerts[rci] = NULL; /* this is a SET OF, so we need to sort them guys - we have the DER already, though */ NSS_CMSArray_Sort((void **)sigd->rawCerts, NSS_CMSUtil_DERCompare, NULL, NULL); } ret = SECSuccess; loser: return ret; }
/* * NSS_CMSSignedData_Encode_BeforeStart - do all the necessary things to a SignedData * before start of encoding. * * In detail: * - find out about the right value to put into sigd->version * - come up with a list of digestAlgorithms (which should be the union of the algorithms * in the signerinfos). * If we happen to have a pre-set list of algorithms (and digest values!), we * check if we have all the signerinfos' algorithms. If not, this is an error. */ SECStatus NSS_CMSSignedData_Encode_BeforeStart(NSSCMSSignedData *sigd) { NSSCMSSignerInfo *signerinfo; SECOidTag digestalgtag; SECItem *dummy; int version; SECStatus rv; PRBool haveDigests = PR_FALSE; int n, i; PLArenaPool *poolp; if (!sigd) { PORT_SetError(SEC_ERROR_INVALID_ARGS); return SECFailure; } poolp = sigd->cmsg->poolp; /* we assume that we have precomputed digests if there is a list of algorithms, and */ /* a chunk of data for each of those algorithms */ if (sigd->digestAlgorithms != NULL && sigd->digests != NULL) { for (i = 0; sigd->digestAlgorithms[i] != NULL; i++) { if (sigd->digests[i] == NULL) break; } if (sigd->digestAlgorithms[i] == NULL) /* reached the end of the array? */ haveDigests = PR_TRUE; /* yes: we must have all the digests */ } version = NSS_CMS_SIGNED_DATA_VERSION_BASIC; /* RFC2630 5.1 "version is the syntax version number..." */ if (NSS_CMSContentInfo_GetContentTypeTag(&(sigd->contentInfo)) != SEC_OID_PKCS7_DATA) version = NSS_CMS_SIGNED_DATA_VERSION_EXT; /* prepare all the SignerInfos (there may be none) */ for (i = 0; i < NSS_CMSSignedData_SignerInfoCount(sigd); i++) { signerinfo = NSS_CMSSignedData_GetSignerInfo(sigd, i); /* RFC2630 5.1 "version is the syntax version number..." */ if (NSS_CMSSignerInfo_GetVersion(signerinfo) != NSS_CMS_SIGNER_INFO_VERSION_ISSUERSN) version = NSS_CMS_SIGNED_DATA_VERSION_EXT; /* collect digestAlgorithms from SignerInfos */ /* (we need to know which algorithms we have when the content comes in) */ /* do not overwrite any existing digestAlgorithms (and digest) */ digestalgtag = NSS_CMSSignerInfo_GetDigestAlgTag(signerinfo); n = NSS_CMSAlgArray_GetIndexByAlgTag(sigd->digestAlgorithms, digestalgtag); if (n < 0 && haveDigests) { /* oops, there is a digestalg we do not have a digest for */ /* but we were supposed to have all the digests already... */ goto loser; } else if (n < 0) { /* add the digestAlgorithm & a NULL digest */ rv = NSS_CMSSignedData_AddDigest(poolp, sigd, digestalgtag, NULL); if (rv != SECSuccess) goto loser; } else { /* found it, nothing to do */ } } dummy = SEC_ASN1EncodeInteger(poolp, &(sigd->version), (long)version); if (dummy == NULL) return SECFailure; /* this is a SET OF, so we need to sort them guys */ rv = NSS_CMSArray_SortByDER((void **)sigd->digestAlgorithms, SEC_ASN1_GET(SECOID_AlgorithmIDTemplate), (void **)sigd->digests); if (rv != SECSuccess) return SECFailure; return SECSuccess; loser: return SECFailure; }