private static void registerCert(X509Certificate cert, int type, String id, Signature sig)
throws DigiDocException {
String sid = id;
if (sid != null) sid = sid.replace(" ", "_");
CertValue cval = new CertValue(sid, cert, type, sig);
sig.addCertValue(cval);
CertID cid = new CertID(sig, cert, type);
sig.addCertID(cid);
if (type != CertID.CERTID_TYPE_SIGNER) cid.setUri("#" + cval.getId());
}
/**
* Finalize signature to desired level
*
* @param sdoc SignedDoc object
* @param sig Signature object
* @param sigVal signature value
* @param profile profile. Use null for default (e.g. profile in signed doc)
* @return finalized signature
*/
public static Signature finalizeSignature(
SignedDoc sdoc, Signature sig, byte[] sigVal, String profile) throws DigiDocException {
String prf = profile;
if (prf == null) prf = sdoc.getProfile();
if (m_logger.isDebugEnabled())
m_logger.debug(
"Finalize sig: "
+ sig.getId()
+ " profile: "
+ prf
+ " sdoc: "
+ sdoc.getFormat()
+ "/"
+ sdoc.getVersion());
// xades-bes
finalizeXadesBES(sig, sigVal);
if (prf != null) {
// T
if (prf.equals(SignedDoc.BDOC_PROFILE_T)
|| prf.equals(SignedDoc.BDOC_PROFILE_CL)
|| prf.equals(SignedDoc.BDOC_PROFILE_TS)) finalizeXadesT(sdoc, sig);
// C-L
if (prf.equals(SignedDoc.BDOC_PROFILE_CL)
|| prf.equals(SignedDoc.BDOC_PROFILE_TM)
|| prf.equals(SignedDoc.BDOC_PROFILE_TS)) finalizeXadesC(sdoc, sig);
// TM
if (prf.equals(SignedDoc.BDOC_PROFILE_TM)) finalizeXadesXL_TM(sdoc, sig);
// TS
if (prf.equals(SignedDoc.BDOC_PROFILE_TS)) finalizeXadesXL_TS(sdoc, sig);
}
return sig;
}
/**
* Finalizes XAdES BES signature form by setting binary signature value
*
* @param sig Signature object
* @param sigVal signature value
* @return completed signature
* @throws DigiDocException
*/
public static Signature finalizeXadesBES(Signature sig, byte[] sigVal) throws DigiDocException {
if (m_logger.isDebugEnabled())
m_logger.debug(
"Finalize XAdES-BES sigval: " + ((sigVal != null) ? sigVal.length : 0) + " bytes");
if (sigVal != null) sig.setSignatureValue(sigVal);
return sig;
}
public static Signature finalizeXadesXL_TS(SignedDoc sdoc, Signature sig)
throws DigiDocException {
if (m_logger.isDebugEnabled())
m_logger.debug("Finalize XAdES-TS: " + sig.getId() + " profile: " + sig.getProfile());
if (sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)) {
DigiDocXmlGenFactory genFac = new DigiDocXmlGenFactory(sdoc);
TimestampFactory tsFac = ConfigManager.instance().getTimestampFactory();
String sTsaCert = ConfigManager.instance().getStringProperty("DIGIDOC_TSA_CRT", null);
if (sTsaCert != null) {
if (m_logger.isDebugEnabled()) m_logger.debug("TSA cert: " + sTsaCert);
X509Certificate tsaCrt = SignedDoc.readCertificate(sTsaCert);
if (tsaCrt != null) {
if (m_logger.isDebugEnabled())
m_logger.debug("Add tsa cert: " + tsaCrt.getSubjectDN().getName());
registerCert(tsaCrt, CertID.CERTID_TYPE_TSA, sig.getId() + "-TSA", sig);
}
}
sig.setProfile(SignedDoc.BDOC_PROFILE_TS);
// get <SigAndRefsTimeStamp>
/* SignAndRefsTimestam not used in bdoc 2.0 any more
StringBuffer sb = new StringBuffer();
String tsaUrl = ConfigManager.instance().getProperty("DIGIDOC_TSA_URL");
genFac.signatureValue2xml(sb, sig.getSignatureValue(), true);
//String sSigValXml = sb.toString().trim();
genFac.completeCertificateRefs2xml(sb, sig.getUnsignedProperties().getCompleteCertificateRefs(), sig, true);
genFac.completeRevocationRefs2xml(sb, sig.getUnsignedProperties().getCompleteRevocationRefs(), sig, true);
String sSigAndRefsDat = sb.toString().trim();
byte[] hash = SignedDoc.digestOfType(sSigAndRefsDat.getBytes(),
(sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC) ? SignedDoc.SHA256_DIGEST_TYPE : SignedDoc.SHA1_DIGEST_TYPE));
if(m_logger.isDebugEnabled())
m_logger.debug("Get sig-val-ts for: " + Base64Util.encode(hash) + " uri: " + tsaUrl +
" DATA:\n---\n" + sSigAndRefsDat + "\n---\n");
TimeStampResponse tresp = tsFac.requestTimestamp(TSPAlgorithms.SHA1.getId(), hash, tsaUrl);
if(tresp != null) {
TimestampInfo ti = new TimestampInfo(sig.getId() + "-T1", sig, TimestampInfo.TIMESTAMP_TYPE_SIG_AND_REFS, hash, tresp);
ti.addIncludeInfo(new IncludeInfo("#" + sig.getId() + "-SIG"));
ti.addIncludeInfo(new IncludeInfo("#" + sig.getId() + "-T0"));
ti.addIncludeInfo(new IncludeInfo("#" + sig.getId() + "-CERTREFS"));
ti.addIncludeInfo(new IncludeInfo("#" + sig.getId() + "-REVOCREFS"));
sig.addTimestampInfo(ti);
sig.setProfile(SignedDoc.BDOC_PROFILE_TS);
}*/
}
return sig;
}
public static Signature finalizeXadesC(SignedDoc sdoc, Signature sig) throws DigiDocException {
if (m_logger.isDebugEnabled())
m_logger.debug("Finalize XAdES-C: " + sig.getId() + " profile: " + sig.getProfile());
CompleteRevocationRefs rrefs = new CompleteRevocationRefs();
CompleteCertificateRefs crefs = new CompleteCertificateRefs();
UnsignedProperties usp = sig.getUnsignedProperties();
if (usp == null) {
usp = new UnsignedProperties(sig);
sig.setUnsignedProperties(usp);
}
usp.setCompleteCertificateRefs(crefs);
usp.setCompleteRevocationRefs(rrefs);
rrefs.setUnsignedProperties(usp);
crefs.setUnsignedProperties(usp);
sig.setUnsignedProperties(usp);
sig.setProfile(SignedDoc.BDOC_PROFILE_CL);
// TODO: update certs and refs
return sig;
}
public static Signature finalizeXadesXL_TM(SignedDoc sdoc, Signature sig)
throws DigiDocException {
if (m_logger.isDebugEnabled())
m_logger.debug("Finalize XAdES-TM: " + sig.getId() + " profile: " + sig.getProfile());
NotaryFactory notFac = ConfigManager.instance().getNotaryFactory();
X509Certificate cert = sig.getKeyInfo().getSignersCertificate();
boolean bUseLocal = ConfigManager.instance().getBooleanProperty("DIGIDOC_USE_LOCAL_TSL", false);
TrustServiceFactory tslFac = ConfigManager.instance().getTslFactory();
String ocspUrl = tslFac.findOcspUrlForCert(cert, 0, bUseLocal);
if (ocspUrl == null)
ocspUrl = ConfigManager.instance().getProperty("DIGIDOC_OCSP_RESPONDER_URL");
X509Certificate caCert = tslFac.findCaForCert(cert, bUseLocal, null);
if (m_logger.isDebugEnabled())
m_logger.debug(
"Get confirmation for cert: "
+ ((cert != null)
? ConvertUtils.getCommonName(cert.getSubjectDN().getName())
: "NULL")
+ " CA: "
+ ((caCert != null)
? ConvertUtils.getCommonName(caCert.getSubjectDN().getName())
: "NULL")
+ " URL: "
+ ((ocspUrl != null) ? ocspUrl : "NONE"));
System.out.println("Get conf: " + sig.getId());
Notary not = notFac.getConfirmation(sig, cert, caCert, null, ocspUrl);
if (m_logger.isDebugEnabled()) m_logger.debug("Resp-id: " + not.getResponderId());
String sRespId = ConvertUtils.getCommonName(not.getResponderId());
// if(sRespId != null && sRespId.startsWith("byName: ")) sRespId = sRespId.substring("byName:
// ".length());
// if(sRespId != null && sRespId.startsWith("byKey: ")) sRespId = sRespId.substring("byKey:
// ".length());
X509Certificate rcert = notFac.getNotaryCert(sRespId, not.getCertNr());
if (m_logger.isDebugEnabled())
m_logger.debug(
"Find responder cert by: "
+ sRespId
+ " and nr: "
+ not.getCertNr()
+ " found: "
+ ((rcert != null) ? "OK" : "NO")
+ " format: "
+ sdoc.getFormat());
// if the request was successful then
// create new data memebers
if (sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC) && (rcert != null)) {
X509Certificate rcacert = tslFac.findCaForCert(rcert, bUseLocal, null);
if (m_logger.isDebugEnabled())
m_logger.debug(
"Register responders CA: "
+ ((rcacert != null) ? rcacert.getSubjectDN().getName() : "NULL"));
String caId =
not.getId() + "-" + ConvertUtils.getCommonName(rcacert.getSubjectDN().getName());
registerCert(rcacert, CertID.CERTID_TYPE_RESPONDER_CA, caId, sig);
}
// add notary to list
// sig.getUnsignedProperties().addNotary(not);
// add ocsp ref for this notary
OcspRef orf =
new OcspRef(
"#" + not.getId(),
not.getResponderId(),
not.getProducedAt(),
(sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)
? SignedDoc.SHA256_DIGEST_ALGORITHM_1
: SignedDoc.SHA1_DIGEST_ALGORITHM),
SignedDoc.digestOfType(
not.getOcspResponseData(),
(sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)
? SignedDoc.SHA256_DIGEST_TYPE
: SignedDoc.SHA1_DIGEST_TYPE)));
sig.getUnsignedProperties().getCompleteRevocationRefs().addOcspRef(orf);
// mark status
sig.setProfile(SignedDoc.BDOC_PROFILE_TM);
// change profile
if (sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC) && sig.getPath() != null) {
if (m_logger.isDebugEnabled()) m_logger.debug("Find signature: " + sig.getPath());
ManifestFileEntry mfe = sdoc.findManifestEntryByPath(sig.getPath());
if (mfe != null) {
mfe.setMediaType(
SignedDoc.MIME_SIGNATURE_BDOC_ + sdoc.getVersion() + "/" + sig.getProfile());
if (m_logger.isDebugEnabled())
m_logger.debug("Change signature: " + sig.getPath() + " type: " + mfe.getMediaType());
}
}
// TODO: update certs and refs
return sig;
}
public static Signature finalizeXadesT(SignedDoc sdoc, Signature sig) throws DigiDocException {
if (m_logger.isDebugEnabled())
m_logger.debug("Finalize XAdES-T: " + sig.getId() + " profile: " + sig.getProfile());
UnsignedProperties usp = new UnsignedProperties(sig);
sig.setUnsignedProperties(usp);
if (sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)) {
DigiDocXmlGenFactory genFac = new DigiDocXmlGenFactory(sdoc);
TimestampFactory tsFac = ConfigManager.instance().getTimestampFactory();
// get <SignatureValueTimeStamp>
StringBuffer sb = new StringBuffer();
String tsaUrl = ConfigManager.instance().getProperty("DIGIDOC_TSA_URL");
genFac.signatureValue2xml(sb, sig.getSignatureValue(), true);
String sSigValXml = sb.toString().trim();
byte[] hash =
SignedDoc.digestOfType(
sSigValXml.getBytes(),
(sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)
? SignedDoc.SHA256_DIGEST_TYPE
: SignedDoc.SHA1_DIGEST_TYPE));
if (m_logger.isDebugEnabled())
m_logger.debug(
"Get sig-val-ts for: "
+ Base64Util.encode(hash)
+ " uri: "
+ tsaUrl
+ " DATA:\n---\n"
+ sSigValXml
+ "\n---\n");
TimeStampResponse tresp = tsFac.requestTimestamp(TSPAlgorithms.SHA1.getId(), hash, tsaUrl);
if (tresp != null) {
TimestampInfo ti =
new TimestampInfo(
sig.getId() + "-T0", sig, TimestampInfo.TIMESTAMP_TYPE_SIGNATURE, hash, tresp);
ti.addIncludeInfo(new IncludeInfo("#" + sig.getId() + "-SIG"));
sig.addTimestampInfo(ti);
try {
if (m_logger.isDebugEnabled())
m_logger.debug("Timestamp: " + Base64Util.encode(tresp.getEncoded()));
} catch (Exception ex) {
}
// sb = new StringBuffer();
// genFac.timestampInfo2xml(sb, ti, true);
// String sToXml = sb.toString();
// TODO: add TSA refs and certs ? Not in TSL yet!
sig.setProfile(SignedDoc.BDOC_PROFILE_T);
try {
X509Certificate cert =
SignedDoc.readCertificate(
new java.io.File("/Users/veiko/workspace/jdigidoc/trunk/iaik-tsa.crt"));
/*Store st = tresp.getTimeStampToken().getCertificates();
if(st != null) {
SignerInformationStore signers = st.getSignerInfos();
Collection c = signers.getSigners();
Iterator it = c.iterator();
while (it.hasNext())
{
SignerInformation signer = (SignerInformation)it.next();
Collection certCollection = certStore.getMatches(signer.getSID());
Iterator certIt = certCollection.iterator();
X509CertificateHolder cert = (X509CertificateHolder)certIt.next();
}
}*/
} catch (Exception ex) {
m_logger.error("Error ts: " + ex);
}
}
}
return sig;
}
/**
* Adds a new uncomplete signature to signed doc
*
* @param sdoc SignedDoc object
* @param profile new signature profile. Use NULL for default
* @param cert signers certificate
* @param claimedRoles signers claimed roles
* @param adr signers address
* @param sId new signature id, Use NULL for default value
* @param sSigMethod signature method uri - ddoc: SignedDoc.RSA_SHA1_SIGNATURE_METHOD, bdoc:
* depends on card type. Use null for default value
* @param sDigType digest type (all other hashes but SignedInfo). Use null for default type
* @return new Signature object
*/
public static Signature prepareXadesBES(
SignedDoc sdoc,
String profile,
X509Certificate cert,
String[] claimedRoles,
SignatureProductionPlace adr,
String sId,
String sSigMethod,
String sDigType)
throws DigiDocException {
if (m_logger.isDebugEnabled())
m_logger.debug(
"Prepare signature in sdoc: "
+ sdoc.getFormat()
+ "/"
+ sdoc.getVersion()
+ "/"
+ sdoc.getProfile()
+ " profile: "
+ profile
+ " signer: "
+ ((cert != null)
? SignedDoc.getCommonName(cert.getSubjectDN().getName())
: "unknown")
+ " id "
+ sId);
boolean bWeakSig = false;
for (int i = 0; i < sdoc.countSignatures(); i++) {
Signature sig = sdoc.getSignature(i);
if (sig.getAltDigestMatch()) bWeakSig = true;
}
if (bWeakSig) {
m_logger.error(
"One or more signatures has wrong DataFile hash even if alternative hash matches!");
throw new DigiDocException(
DigiDocException.ERR_VERIFY,
"One or more signatures has wrong DataFile hash even if alternative hash matches!",
null);
}
// count roles
if (claimedRoles != null && claimedRoles.length > 1) {
m_logger.error("Currently supports no more than 1 ClaimedRole");
throw new DigiDocException(
DigiDocException.ERR_UNSUPPORTED, "Currently supports no more than 1 ClaimedRole", null);
}
// cannot proceed if cert has not been read
if (cert == null) {
m_logger.error("Signers certificate missing during signature preparation!");
throw new DigiDocException(
DigiDocException.ERR_SIGNERS_CERT,
"Signers certificate missing during signature preparation!",
null);
}
boolean bCheckNonRepu = ConfigManager.instance().getBooleanProperty("KEY_USAGE_CHECK", true);
if (bCheckNonRepu && !ConfigManager.isSignatureKey(cert)) {
if (m_logger.isDebugEnabled())
m_logger.debug("Signers cert does not have non-repudiation bit set!");
throw new DigiDocException(
DigiDocException.ERR_SIGNERS_CERT_NONREPUD,
"Signers cert does not have non-repudiation bit set!",
null);
}
Signature sig = new Signature(sdoc);
sig.setId(sId != null ? sId : sdoc.getNewSignatureId());
if (profile != null) { // use new profile for this signature
sig.setProfile(profile);
if (sdoc.getProfile() == null || sdoc.getProfile().equals(SignedDoc.BDOC_PROFILE_BES))
sdoc.setProfile(profile); // change also container to new profile
} else // use default profile
sig.setProfile(sdoc.getProfile());
// create SignedInfo block
SignedInfo si =
new SignedInfo(
sig,
((sSigMethod != null) ? sSigMethod : SignedDoc.RSA_SHA1_SIGNATURE_METHOD),
SignedDoc.CANONICALIZATION_METHOD_20010315);
if (sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)
&& sdoc.getVersion().equals(SignedDoc.BDOC_VERSION_2_1)) {
si.setCanonicalizationMethod(SignedDoc.CANONICALIZATION_METHOD_1_1);
sdoc.setDefaultNsPref(SignedDoc.FORMAT_BDOC);
}
if (m_logger.isDebugEnabled())
m_logger.debug(
"Signer: "
+ cert.getSubjectDN().getName()
+ " EC key: "
+ isEcPubKey(cert)
+ " pre-2011: "
+ isPre2011IdCard(cert)
+ " digi-id: "
+ isDigiIdCard(cert)
+ " 2011: "
+ is2011Card(cert));
if (sSigMethod == null) { // default values
if (sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)) {
if (isPre2011IdCard(cert)) {
if (m_logger.isDebugEnabled())
m_logger.debug("Generating rsa-sha224 signature for pre-2011 card");
si.setSignatureMethod(SignedDoc.RSA_SHA224_SIGNATURE_METHOD);
} else {
String dType =
ConfigManager.instance().getStringProperty("DIGIDOC_DIGEST_TYPE", "SHA-256");
String sSigMeth = ConfigManager.digType2SigMeth(dType, isEcPubKey(cert));
if (m_logger.isDebugEnabled())
m_logger.debug("Generating digest: " + dType + " and signature: " + sSigMeth);
if (sSigMeth != null) si.setSignatureMethod(sSigMeth);
else
throw new DigiDocException(
DigiDocException.ERR_DIGEST_ALGORITHM, "Invalid digest type: " + dType, null);
}
}
}
if (sdoc.getFormat().equals(SignedDoc.FORMAT_XADES)
|| sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)) si.setId(sig.getId() + "-SignedInfo");
// SignedDataObjectProperties
SignedDataObjectProperties sdop = new SignedDataObjectProperties();
// add DataFile references
for (int i = 0; i < sdoc.countDataFiles(); i++) {
DataFile df = sdoc.getDataFile(i);
if (sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)) {
if (!df.isDigestsCalculated()) {
try {
InputStream is = null;
if (df.getDfCacheFile() != null) is = df.getBodyAsStream();
if (is == null) is = sdoc.findDataFileAsStream(df.getFileName());
if (is == null) is = new java.io.FileInputStream(df.getFileName());
df.calcHashes(is);
} catch (java.io.FileNotFoundException ex) {
throw new DigiDocException(
DigiDocException.ERR_READ_FILE, "Cannot read file: " + df.getFileName(), null);
}
}
} else {
if (!df.isDigestsCalculated()) df.calculateFileSizeAndDigest(null);
}
if (m_logger.isDebugEnabled()) m_logger.debug("Add ref for df: " + df.getId());
Reference ref = new Reference(si, df, sDigType);
if (sdoc.getFormat().equals(SignedDoc.FORMAT_XADES)
|| sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)) ref.setId(sig.getId() + "-ref-" + i);
si.addReference(ref);
if (sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)
&& sdoc.getVersion().equals(SignedDoc.BDOC_VERSION_2_1)) {
DataObjectFormat dof = new DataObjectFormat("#" + ref.getId());
dof.setMimeType(df.getMimeType());
sdop.addDataObjectFormat(dof);
}
}
// manifest.xml reference - bdoc 2.1-s ei allkirjasta manifest.xml-i
// create key info
KeyInfo ki = new KeyInfo(cert);
if (sdoc.getFormat().equals(SignedDoc.FORMAT_XADES)
|| sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)) ki.setId(sig.getId() + "-KeyInfo");
sig.setKeyInfo(ki);
ki.setSignature(sig);
registerCert(cert, CertValue.CERTVAL_TYPE_SIGNER, null, sig);
if (m_logger.isDebugEnabled()) m_logger.debug("Signer cert: " + cert.getSubjectDN().getName());
boolean bUseLocal = ConfigManager.instance().getBooleanProperty("DIGIDOC_USE_LOCAL_TSL", false);
if (sdoc.getFormat().equals(SignedDoc.FORMAT_XADES)
|| sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)) {
TrustServiceFactory tslFac = ConfigManager.instance().getTslFactory();
// first lookup in TSL-s
X509Certificate ca = tslFac.findCaForCert(cert, bUseLocal, null);
if (ca != null) {
String caId = sig.getId() + "-" + ConvertUtils.getCommonName(ca.getSubjectDN().getName());
registerCert(ca, CertValue.CERTVAL_TYPE_CA, caId, sig);
}
// TODO: maybe copy local CA certs to signature until the first ca that is in TSL?
}
// create signed properties
SignedProperties sp = new SignedProperties(sig, cert, claimedRoles, adr);
sig.setSignedProperties(sp);
// bdoc 2.0 nonce policy
if (sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)
&& sdoc.getVersion().equals(SignedDoc.BDOC_VERSION_2_1)
&& (sig.getProfile().equals(SignedDoc.BDOC_PROFILE_TM)
|| sig.getProfile().equals(SignedDoc.BDOC_PROFILE_BES)
|| sig.getProfile().equals(SignedDoc.BDOC_PROFILE_CL)
|| sig.getProfile().equals(SignedDoc.BDOC_PROFILE_TMA))) {
sp.setSignedDataObjectProperties(sdop);
Identifier id1 = new Identifier(Identifier.OIDAsURN);
id1.setUri(BDOC_210_OID);
ObjectIdentifier oid1 = new ObjectIdentifier(id1);
SignaturePolicyId spi1 = new SignaturePolicyId(oid1);
spi1.setDigestAlgorithm(BDOC_210_DIGEST_METHOD);
spi1.setDigestValue(ConvertUtils.hex2bin(BDOC_210_DIGEST_HEX));
// System.out.println("Spec hash: " + BDOC_210_DIGEST_HEX + " b64: " +
// Base64Util.encode(ConvertUtils.hex2bin(BDOC_210_DIGEST_HEX)));
spi1.addSigPolicyQualifier(new SpUri(BDOC_210_SPURI));
SignaturePolicyIdentifier spid1 = new SignaturePolicyIdentifier(spi1);
sp.setSignaturePolicyIdentifier(spid1);
} else {
SignaturePolicyIdentifier spid1 = new SignaturePolicyIdentifier(null);
sp.setSignaturePolicyIdentifier(spid1);
}
Reference ref = new Reference(si, sp, sDigType);
if (sdoc.getFormat().equals(SignedDoc.FORMAT_XADES)
|| sdoc.getFormat().equals(SignedDoc.FORMAT_BDOC)) ref.setId(sig.getId() + "-ref-sp");
ref.setType(SignedDoc.SIGNEDPROPERTIES_TYPE);
si.addReference(ref);
sig.setSignedInfo(si);
sdoc.addSignature(sig);
if (m_logger.isDebugEnabled())
m_logger.debug("Prepared signature: " + sig.getId() + "/" + sig.getProfile());
return sig;
}