import java.util.Date;
import java.util.Iterator;
-
/**
* This class contains a bunch of utility methods that are generally useful in
* signing and verifying rrsets.
*/
public class SignUtils {
// private static final int DSA_SIGNATURE_LENGTH = 20;
- private static final int ASN1_INT = 0x02;
- private static final int ASN1_SEQ = 0x30;
- public static final int RR_NORMAL = 0;
- public static final int RR_DELEGATION = 1;
- public static final int RR_GLUE = 2;
- public static final int RR_INVALID = 3;
- private static Logger log = Logger.getLogger(SignUtils.class);
+ private static final int ASN1_INT = 0x02;
+ private static final int ASN1_SEQ = 0x30;
+ public static final int RR_NORMAL = 0;
+ public static final int RR_DELEGATION = 1;
+ public static final int RR_GLUE = 2;
+ public static final int RR_INVALID = 3;
+ private static Logger log = Logger.getLogger(SignUtils.class);
/**
* Generate from some basic information a prototype SIG RR containing
* everything but the actual signature itself.
- *
+ *
* @param rrset
* the RRset being signed.
* @param signer
* @return a prototype signature based on the RRset and key information.
*/
public static RRSIGRecord generatePreRRSIG(RRset rrset, Name signer,
- int alg, int keyid, Date start, Date expire, long sig_ttl) {
+ int alg, int keyid, Date start, Date expire, long sig_ttl) {
return new RRSIGRecord(rrset.getName(), rrset.getDClass(), sig_ttl,
- rrset.getType(), alg, rrset.getTTL(), expire, start, keyid, signer,
- null);
+ rrset.getType(), alg, rrset.getTTL(), expire, start, keyid,
+ signer, null);
}
/**
* Generate from some basic information a prototype SIG RR containing
* everything but the actual signature itself.
- *
+ *
* @param rrset
* the RRset being signed.
* @param key
* @return a prototype signature based on the RRset and key information.
*/
public static RRSIGRecord generatePreRRSIG(RRset rrset, DNSKEYRecord key,
- Date start, Date expire, long sig_ttl) {
- return generatePreRRSIG(rrset, key.getName(), key.getAlgorithm(),
- key.getFootprint(), start, expire, sig_ttl);
+ Date start, Date expire, long sig_ttl) {
+ return generatePreRRSIG(rrset, key.getName(), key.getAlgorithm(), key
+ .getFootprint(), start, expire, sig_ttl);
}
/**
* Generate from some basic information a prototype SIG RR containing
* everything but the actual signature itself.
- *
+ *
* @param rec
* the DNS record being signed (forming an entire RRset).
* @param key
* @return a prototype signature based on the Record and key information.
*/
public static RRSIGRecord generatePreRRSIG(Record rec, DNSKEYRecord key,
- Date start, Date expire, long sig_ttl) {
- return new RRSIGRecord(rec.getName(), rec.getDClass(), sig_ttl,
- rec.getType(), key.getAlgorithm(), rec.getTTL(), expire, start,
- key.getFootprint(), key.getName(), null);
+ Date start, Date expire, long sig_ttl) {
+ return new RRSIGRecord(rec.getName(), rec.getDClass(), sig_ttl, rec
+ .getType(), key.getAlgorithm(), rec.getTTL(), expire, start,
+ key.getFootprint(), key.getName(), null);
}
/**
* Generate the binary image of the prototype SIG RR.
- *
+ *
* @param presig
* the SIG RR prototype.
* @return the RDATA portion of the prototype SIG record. This forms the
* first part of the data to be signed.
*/
- private static byte [] generatePreSigRdata(RRSIGRecord presig) {
+ private static byte[] generatePreSigRdata(RRSIGRecord presig) {
// Generate the binary image;
DNSOutput image = new DNSOutput();
// precalculate some things
- int start_time = (int) (presig.getTimeSigned().getTime() / 1000);
- int expire_time = (int) (presig.getExpire().getTime() / 1000);
- Name signer = presig.getSigner();
+ int start_time = (int) (presig.getTimeSigned().getTime() / 1000);
+ int expire_time = (int) (presig.getExpire().getTime() / 1000);
+ Name signer = presig.getSigner();
// first write out the partial SIG record (this is the SIG RDATA
// minus the actual signature.
/**
* Calculate the canonical wire line format of the RRset.
- *
+ *
* @param rrset
* the RRset to convert.
* @param ttl
* part of data to be signed.
*/
@SuppressWarnings("unchecked")
- public static byte [] generateCanonicalRRsetData(RRset rrset, long ttl,
- int labels) {
+ public static byte[] generateCanonicalRRsetData(RRset rrset, long ttl,
+ int labels) {
DNSOutput image = new DNSOutput();
if (ttl == 0) {
boolean wildcardName = false;
if (n.labels() != labels) {
- n = n.wild(n.labels() - labels);
- wildcardName = true;
- log.trace("Detected wildcard expansion: " + rrset.getName() +
- " changed to " + n);
+ n = n.wild(n.labels() - labels);
+ wildcardName = true;
+ log.trace("Detected wildcard expansion: " + rrset.getName()
+ + " changed to " + n);
}
// now convert the wire format records in the RRset into a
// list of byte arrays.
- ArrayList<byte []> canonical_rrs = new ArrayList<byte []>();
+ ArrayList<byte[]> canonical_rrs = new ArrayList<byte[]>();
for (Iterator i = rrset.rrs(); i.hasNext();) {
Record r = (Record) i.next();
// or ownername.
// In the TTL case, this avoids changing the ttl in the
// response.
- r = Record.newRecord(n, r.getType(), r.getDClass(), ttl,
- r.rdataToWireCanonical());
+ r = Record.newRecord(n, r.getType(), r.getDClass(), ttl, r
+ .rdataToWireCanonical());
}
- byte [] wire_fmt = r.toWireCanonical();
+ byte[] wire_fmt = r.toWireCanonical();
canonical_rrs.add(wire_fmt);
}
// put the records into the correct ordering.
// Calculate the offset where the RDATA begins (we have to skip
// past the length byte)
- int offset = rrset.getName().toWireCanonical().length +
- 10;
- ByteArrayComparator bac = new ByteArrayComparator(offset, false);
+ int offset = rrset.getName().toWireCanonical().length + 10;
+ ByteArrayComparator bac = new ByteArrayComparator(offset, false);
Collections.sort(canonical_rrs, bac);
- for (Iterator<byte []> i = canonical_rrs.iterator(); i.hasNext();) {
- byte [] wire_fmt_rec = i.next();
+ for (Iterator<byte[]> i = canonical_rrs.iterator(); i.hasNext();) {
+ byte[] wire_fmt_rec = i.next();
image.writeByteArray(wire_fmt_rec);
}
/**
* Given an RRset and the prototype signature, generate the canonical data
* that is to be signed.
- *
+ *
* @param rrset
* the RRset to be signed.
* @param presig
* a prototype SIG RR created using the same RRset.
* @return a block of data ready to be signed.
*/
- public static byte [] generateSigData(RRset rrset, RRSIGRecord presig)
- throws IOException {
- byte [] rrset_data = generateCanonicalRRsetData(rrset,
- presig.getOrigTTL(), presig.getLabels());
+ public static byte[] generateSigData(RRset rrset, RRSIGRecord presig)
+ throws IOException {
+ byte[] rrset_data = generateCanonicalRRsetData(rrset, presig
+ .getOrigTTL(), presig.getLabels());
return generateSigData(rrset_data, presig);
}
/**
* Given an RRset and the prototype signature, generate the canonical data
* that is to be signed.
- *
+ *
* @param rrset_data
* the RRset converted into canonical wire line format (as per
* the canonicalization rules in RFC 2535).
* <code>rrset_data</code>.
* @return a block of data ready to be signed.
*/
- public static byte [] generateSigData(byte [] rrset_data, RRSIGRecord presig)
- throws IOException {
- byte [] sig_rdata = generatePreSigRdata(presig);
+ public static byte[] generateSigData(byte[] rrset_data, RRSIGRecord presig)
+ throws IOException {
+ byte[] sig_rdata = generatePreSigRdata(presig);
- ByteArrayOutputStream image = new ByteArrayOutputStream(sig_rdata.length +
- rrset_data.length);
+ ByteArrayOutputStream image = new ByteArrayOutputStream(
+ sig_rdata.length + rrset_data.length);
image.write(sig_rdata);
image.write(rrset_data);
/**
* Given the actual signature and the prototype signature, combine them and
* return the fully formed RRSIGRecord.
- *
+ *
* @param signature
* the cryptographic signature, in DNSSEC format.
* @param presig
* the prototype RRSIG RR to add the signature to.
* @return the fully formed RRSIG RR.
*/
- public static RRSIGRecord generateRRSIG(byte [] signature,
- RRSIGRecord presig) {
- return new RRSIGRecord(presig.getName(), presig.getDClass(),
- presig.getTTL(), presig.getTypeCovered(), presig.getAlgorithm(),
- presig.getOrigTTL(), presig.getExpire(), presig.getTimeSigned(),
- presig.getFootprint(), presig.getSigner(), signature);
+ public static RRSIGRecord generateRRSIG(byte[] signature, RRSIGRecord presig) {
+ return new RRSIGRecord(presig.getName(), presig.getDClass(), presig
+ .getTTL(), presig.getTypeCovered(), presig.getAlgorithm(),
+ presig.getOrigTTL(), presig.getExpire(),
+ presig.getTimeSigned(), presig.getFootprint(), presig
+ .getSigner(), signature);
}
/**
* Converts from a RFC 2536 formatted DSA signature to a JCE (ASN.1)
* formatted signature.
- *
+ *
* <p>
* ASN.1 format = ASN1_SEQ . seq_length . ASN1_INT . Rlength . R . ANS1_INT
* . Slength . S
* </p>
- *
+ *
* The integers R and S may have a leading null byte to force the integer
* positive.
- *
+ *
* @param signature
* the RFC 2536 formatted DSA signature.
* @return The ASN.1 formatted DSA signature.
* if there was something wrong with the RFC 2536 formatted
* signature.
*/
- public static byte [] convertDSASignature(byte [] signature)
- throws SignatureException {
+ public static byte[] convertDSASignature(byte[] signature)
+ throws SignatureException {
if (signature.length != 41) {
throw new SignatureException(
- "RFC 2536 signature not expected length.");
+ "RFC 2536 signature not expected length.");
}
byte r_pad = 0;
// ASN.1 length = R length + S length + (2 + 2 + 2), where each 2
// is for a ASN.1 type-length byte pair of which there are three
// (SEQ, INT, INT).
- byte sig_length = (byte) (40 + r_pad + s_pad + 6);
+ byte sig_length = (byte) (40 + r_pad + s_pad + 6);
- byte [] sig = new byte[sig_length];
- byte pos = 0;
+ byte[] sig = new byte[sig_length];
+ byte pos = 0;
- sig[pos++] = ASN1_SEQ;
- sig[pos++] = (byte) (sig_length - 2); // all but the SEQ type+length.
- sig[pos++] = ASN1_INT;
- sig[pos++] = (byte) (20 + r_pad);
+ sig[pos++] = ASN1_SEQ;
+ sig[pos++] = (byte) (sig_length - 2); // all but the SEQ type+length.
+ sig[pos++] = ASN1_INT;
+ sig[pos++] = (byte) (20 + r_pad);
// copy the value of R, leaving a null byte if necessary
if (r_pad == 1) {
System.arraycopy(signature, 1, sig, pos, 20);
pos += 20;
- sig[pos++] = ASN1_INT;
- sig[pos++] = (byte) (20 + s_pad);
+ sig[pos++] = ASN1_INT;
+ sig[pos++] = (byte) (20 + s_pad);
// copy the value of S, leaving a null byte if necessary
if (s_pad == 1) {
/**
* Converts from a JCE (ASN.1) formatted DSA signature to a RFC 2536
* compliant signature.
- *
+ *
* <p>
* rfc2536 format = T . R . S
* </p>
- *
+ *
* where T is a number between 0 and 8, which is based on the DSA key
* length, and R & S are formatted to be exactly 20 bytes each (no leading
* null bytes).
- *
+ *
* @param params
* the DSA parameters associated with the DSA key used to
* generate the signature.
* @throws SignatureException
* if something is wrong with the ASN.1 format.
*/
- public static byte [] convertDSASignature(DSAParams params,
- byte [] signature) throws SignatureException {
+ public static byte[] convertDSASignature(DSAParams params, byte[] signature)
+ throws SignatureException {
if ((signature[0] != ASN1_SEQ) || (signature[2] != ASN1_INT)) {
throw new SignatureException(
- "Invalid ASN.1 signature format: expected SEQ, INT");
+ "Invalid ASN.1 signature format: expected SEQ, INT");
}
byte r_pad = (byte) (signature[3] - 20);
if (signature[24 + r_pad] != ASN1_INT) {
throw new SignatureException(
- "Invalid ASN.1 signature format: expected SEQ, INT, INT");
+ "Invalid ASN.1 signature format: expected SEQ, INT, INT");
}
log.trace("(start) ASN.1 DSA Sig:\n" + base64.toString(signature));
- byte s_pad = (byte) (signature[25 + r_pad] - 20);
+ byte s_pad = (byte) (signature[25 + r_pad] - 20);
- byte [] sig = new byte[41]; // all rfc2536 signatures are 41 bytes.
+ byte[] sig = new byte[41]; // all rfc2536 signatures are 41 bytes.
// Calculate T:
sig[0] = (byte) ((params.getP().bitLength() - 512) / 64);
// S is shorter than 20 bytes, so right justify the number
// (s_pad is negative here).
Arrays.fill(sig, 21, 21 - s_pad, (byte) 0);
- System.arraycopy(signature, 26 + r_pad, sig, 21 - s_pad, 20 +
- s_pad);
+ System
+ .arraycopy(signature, 26 + r_pad, sig, 21 - s_pad,
+ 20 + s_pad);
}
if ((r_pad < 0) || (s_pad < 0)) {
- log.trace("(finish ***) RFC 2536 DSA Sig:\n" +
- base64.toString(sig));
+ log
+ .trace("(finish ***) RFC 2536 DSA Sig:\n"
+ + base64.toString(sig));
} else {
log.trace("(finish) RFC 2536 DSA Sig:\n" + base64.toString(sig));
}
* useful for comparing RDATA portions of DNS records in doing DNSSEC
* canonical ordering.
*/
- public static class ByteArrayComparator implements Comparator<byte []> {
- private int mOffset = 0;
- private boolean mDebug = false;
+ public static class ByteArrayComparator implements Comparator<byte[]> {
+ private int mOffset = 0;
+ private boolean mDebug = false;
- public ByteArrayComparator() {}
+ public ByteArrayComparator() {
+ }
public ByteArrayComparator(int offset, boolean debug) {
- mOffset = offset;
- mDebug = debug;
+ mOffset = offset;
+ mDebug = debug;
}
- public int compare(byte [] b1, byte [] b2) throws ClassCastException {
+ public int compare(byte[] b1, byte[] b2) throws ClassCastException {
for (int i = mOffset; (i < b1.length) && (i < b2.length); i++) {
if (b1[i] != b2[i]) {
if (mDebug) {
- System.out.println("offset " + i +
- " differs (this is " + (i - mOffset) +
- " bytes in from our offset.)");
+ System.out
+ .println("offset " + i + " differs (this is "
+ + (i - mOffset)
+ + " bytes in from our offset.)");
}
return (b1[i] & 0xFF) - (b2[i] & 0xFF);
git://blacka.com / captive-validator.git / blobdiff