use of sun.security.x509.NameConstraintsExtension in project jdk8u_jdk by JetBrains.
the class Builder method targetDistance.
/**
* Determine how close a given certificate gets you toward
* a given target.
*
* @param constraints Current NameConstraints; if null,
* then caller must verify NameConstraints
* independently, realizing that this certificate
* may not actually lead to the target at all.
* @param cert Candidate certificate for chain
* @param target GeneralNameInterface name of target
* @return distance from this certificate to target:
* <ul>
* <li>-1 means certificate could be CA for target, but
* there are no NameConstraints limiting how close
* <li> 0 means certificate subject or subjectAltName
* matches target
* <li> 1 means certificate is permitted to be CA for
* target.
* <li> 2 means certificate is permitted to be CA for
* parent of target.
* <li>>0 in general, means certificate is permitted
* to be a CA for this distance higher in the naming
* hierarchy than the target, plus 1.
* </ul>
* <p>Note that the subject and/or subjectAltName of the
* candidate cert does not have to be an ancestor of the
* target in order to be a CA that can issue a certificate to
* the target. In these cases, the target distance is calculated
* by inspecting the NameConstraints extension in the candidate
* certificate. For example, suppose the target is an X.500 DN with
* a value of "CN=mullan,OU=ireland,O=sun,C=us" and the
* NameConstraints extension in the candidate certificate
* includes a permitted component of "O=sun,C=us", which implies
* that the candidate certificate is allowed to issue certs in
* the "O=sun,C=us" namespace. The target distance is 3
* ((distance of permitted NC from target) + 1).
* The (+1) is added to distinguish the result from the case
* which returns (0).
* @throws IOException if certificate does not get closer
*/
static int targetDistance(NameConstraintsExtension constraints, X509Certificate cert, GeneralNameInterface target) throws IOException {
/* ensure that certificate satisfies existing name constraints */
if (constraints != null && !constraints.verify(cert)) {
throw new IOException("certificate does not satisfy existing name " + "constraints");
}
X509CertImpl certImpl;
try {
certImpl = X509CertImpl.toImpl(cert);
} catch (CertificateException e) {
throw new IOException("Invalid certificate", e);
}
/* see if certificate subject matches target */
X500Name subject = X500Name.asX500Name(certImpl.getSubjectX500Principal());
if (subject.equals(target)) {
/* match! */
return 0;
}
SubjectAlternativeNameExtension altNameExt = certImpl.getSubjectAlternativeNameExtension();
if (altNameExt != null) {
GeneralNames altNames = altNameExt.get(SubjectAlternativeNameExtension.SUBJECT_NAME);
/* see if any alternative name matches target */
if (altNames != null) {
for (int j = 0, n = altNames.size(); j < n; j++) {
GeneralNameInterface altName = altNames.get(j).getName();
if (altName.equals(target)) {
return 0;
}
}
}
}
/* no exact match; see if certificate can get us to target */
/* first, get NameConstraints out of certificate */
NameConstraintsExtension ncExt = certImpl.getNameConstraintsExtension();
if (ncExt == null) {
return -1;
}
/* merge certificate's NameConstraints with current NameConstraints */
if (constraints != null) {
constraints.merge(ncExt);
} else {
// Make sure we do a clone here, because we're probably
// going to modify this object later and we don't want to
// be sharing it with a Certificate object!
constraints = (NameConstraintsExtension) ncExt.clone();
}
if (debug != null) {
debug.println("Builder.targetDistance() merged constraints: " + String.valueOf(constraints));
}
/* reduce permitted by excluded */
GeneralSubtrees permitted = constraints.get(NameConstraintsExtension.PERMITTED_SUBTREES);
GeneralSubtrees excluded = constraints.get(NameConstraintsExtension.EXCLUDED_SUBTREES);
if (permitted != null) {
permitted.reduce(excluded);
}
if (debug != null) {
debug.println("Builder.targetDistance() reduced constraints: " + permitted);
}
/* see if new merged constraints allow target */
if (!constraints.verify(target)) {
throw new IOException("New certificate not allowed to sign " + "certificate for target");
}
/* find distance to target, if any, in permitted */
if (permitted == null) {
/* certificate is unconstrained; could sign for anything */
return -1;
}
for (int i = 0, n = permitted.size(); i < n; i++) {
GeneralNameInterface perName = permitted.get(i).getName().getName();
int distance = distance(perName, target, -1);
if (distance >= 0) {
return (distance + 1);
}
}
/* no matching type in permitted; cert holder could certify target */
return -1;
}
use of sun.security.x509.NameConstraintsExtension in project jdk8u_jdk by JetBrains.
the class ConstraintsChecker method mergeNameConstraints.
/**
* Helper to fold sets of name constraints together
*/
static NameConstraintsExtension mergeNameConstraints(X509Certificate currCert, NameConstraintsExtension prevNC) throws CertPathValidatorException {
X509CertImpl currCertImpl;
try {
currCertImpl = X509CertImpl.toImpl(currCert);
} catch (CertificateException ce) {
throw new CertPathValidatorException(ce);
}
NameConstraintsExtension newConstraints = currCertImpl.getNameConstraintsExtension();
if (debug != null) {
debug.println("prevNC = " + prevNC + ", newNC = " + String.valueOf(newConstraints));
}
// new name constraints.
if (prevNC == null) {
if (debug != null) {
debug.println("mergedNC = " + String.valueOf(newConstraints));
}
if (newConstraints == null) {
return newConstraints;
} else {
// be sharing it with a Certificate object!
return (NameConstraintsExtension) newConstraints.clone();
}
} else {
try {
// after merge, prevNC should contain the merged constraints
prevNC.merge(newConstraints);
} catch (IOException ioe) {
throw new CertPathValidatorException(ioe);
}
if (debug != null) {
debug.println("mergedNC = " + prevNC);
}
return prevNC;
}
}
use of sun.security.x509.NameConstraintsExtension in project jdk8u_jdk by JetBrains.
the class TrustAnchor method setNameConstraints.
/**
* Decode the name constraints and clone them if not null.
*/
private void setNameConstraints(byte[] bytes) {
if (bytes == null) {
ncBytes = null;
nc = null;
} else {
ncBytes = bytes.clone();
// validate DER encoding
try {
nc = new NameConstraintsExtension(Boolean.FALSE, bytes);
} catch (IOException ioe) {
IllegalArgumentException iae = new IllegalArgumentException(ioe.getMessage());
iae.initCause(ioe);
throw iae;
}
}
}
use of sun.security.x509.NameConstraintsExtension in project jdk8u_jdk by JetBrains.
the class X509CertSelectorTest method testNameConstraints.
// Tests matching on the name constraints contained in the certificate.
private void testNameConstraints() throws IOException {
System.out.println("X.509 Certificate Match on name constraints");
// bad match
GeneralSubtrees subjectTree = new GeneralSubtrees();
subjectTree.add(getGeneralSubtree((X500Name) cert.getSubjectDN()));
NameConstraintsExtension ext = new NameConstraintsExtension((GeneralSubtrees) null, subjectTree);
X509CertSelector selector = new X509CertSelector();
selector.setNameConstraints(ext.getExtensionValue());
checkMatch(selector, cert, false);
// good match
ext = new NameConstraintsExtension(subjectTree, null);
selector.setNameConstraints(ext.getExtensionValue());
checkMatch(selector, cert, true);
}
use of sun.security.x509.NameConstraintsExtension in project Bytecoder by mirkosertic.
the class Builder method targetDistance.
/**
* Determine how close a given certificate gets you toward
* a given target.
*
* @param constraints Current NameConstraints; if null,
* then caller must verify NameConstraints
* independently, realizing that this certificate
* may not actually lead to the target at all.
* @param cert Candidate certificate for chain
* @param target GeneralNameInterface name of target
* @return distance from this certificate to target:
* <ul>
* <li>-1 means certificate could be CA for target, but
* there are no NameConstraints limiting how close
* <li> 0 means certificate subject or subjectAltName
* matches target
* <li> 1 means certificate is permitted to be CA for
* target.
* <li> 2 means certificate is permitted to be CA for
* parent of target.
* <li>>0 in general, means certificate is permitted
* to be a CA for this distance higher in the naming
* hierarchy than the target, plus 1.
* </ul>
* <p>Note that the subject and/or subjectAltName of the
* candidate cert does not have to be an ancestor of the
* target in order to be a CA that can issue a certificate to
* the target. In these cases, the target distance is calculated
* by inspecting the NameConstraints extension in the candidate
* certificate. For example, suppose the target is an X.500 DN with
* a value of "CN=mullan,OU=ireland,O=sun,C=us" and the
* NameConstraints extension in the candidate certificate
* includes a permitted component of "O=sun,C=us", which implies
* that the candidate certificate is allowed to issue certs in
* the "O=sun,C=us" namespace. The target distance is 3
* ((distance of permitted NC from target) + 1).
* The (+1) is added to distinguish the result from the case
* which returns (0).
* @throws IOException if certificate does not get closer
*/
static int targetDistance(NameConstraintsExtension constraints, X509Certificate cert, GeneralNameInterface target) throws IOException {
/* ensure that certificate satisfies existing name constraints */
if (constraints != null && !constraints.verify(cert)) {
throw new IOException("certificate does not satisfy existing name " + "constraints");
}
X509CertImpl certImpl;
try {
certImpl = X509CertImpl.toImpl(cert);
} catch (CertificateException e) {
throw new IOException("Invalid certificate", e);
}
/* see if certificate subject matches target */
X500Name subject = X500Name.asX500Name(certImpl.getSubjectX500Principal());
if (subject.equals(target)) {
/* match! */
return 0;
}
SubjectAlternativeNameExtension altNameExt = certImpl.getSubjectAlternativeNameExtension();
if (altNameExt != null) {
GeneralNames altNames = altNameExt.get(SubjectAlternativeNameExtension.SUBJECT_NAME);
/* see if any alternative name matches target */
if (altNames != null) {
for (int j = 0, n = altNames.size(); j < n; j++) {
GeneralNameInterface altName = altNames.get(j).getName();
if (altName.equals(target)) {
return 0;
}
}
}
}
/* no exact match; see if certificate can get us to target */
/* first, get NameConstraints out of certificate */
NameConstraintsExtension ncExt = certImpl.getNameConstraintsExtension();
if (ncExt == null) {
return -1;
}
/* merge certificate's NameConstraints with current NameConstraints */
if (constraints != null) {
constraints.merge(ncExt);
} else {
// Make sure we do a clone here, because we're probably
// going to modify this object later and we don't want to
// be sharing it with a Certificate object!
constraints = (NameConstraintsExtension) ncExt.clone();
}
if (debug != null) {
debug.println("Builder.targetDistance() merged constraints: " + String.valueOf(constraints));
}
/* reduce permitted by excluded */
GeneralSubtrees permitted = constraints.get(NameConstraintsExtension.PERMITTED_SUBTREES);
GeneralSubtrees excluded = constraints.get(NameConstraintsExtension.EXCLUDED_SUBTREES);
if (permitted != null) {
permitted.reduce(excluded);
}
if (debug != null) {
debug.println("Builder.targetDistance() reduced constraints: " + permitted);
}
/* see if new merged constraints allow target */
if (!constraints.verify(target)) {
throw new IOException("New certificate not allowed to sign " + "certificate for target");
}
/* find distance to target, if any, in permitted */
if (permitted == null) {
/* certificate is unconstrained; could sign for anything */
return -1;
}
for (int i = 0, n = permitted.size(); i < n; i++) {
GeneralNameInterface perName = permitted.get(i).getName().getName();
int distance = distance(perName, target, -1);
if (distance >= 0) {
return (distance + 1);
}
}
/* no matching type in permitted; cert holder could certify target */
return -1;
}
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