Right. From SignatureFileVerifier.java
/**
* Utility method used by JarVerifier and JarSigner
* to determine the signature file names and PKCS7 block
* files names that are supported
*
* @param s file name
* @return true if the input file name is a supported
* Signature File or PKCS7 block file name
*/
public static boolean isBlockOrSF(String s) {
// we currently only support DSA and RSA PKCS7 blocks
return s.endsWith(".SF")
|| s.endsWith(".DSA")
|| s.endsWith(".RSA")
|| s.endsWith(".EC");
}
/**
* Yet another utility method used by JarVerifier and JarSigner
* to determine what files are signature related, which includes
* the MANIFEST, SF files, known signature block files, and other
* unknown signature related files (those starting with SIG- with
* an optional [A-Z0-9]{1,3} extension right inside META-INF).
*
* @param name file name
* @return true if the input file name is signature related
*/
public static boolean isSigningRelated(String name) {
name = name.toUpperCase(Locale.ENGLISH);
if (!name.startsWith("META-INF/")) {
return false;
}
name = name.substring(9);
if (name.indexOf('/') != -1) {
return false;
}
if (isBlockOrSF(name) || name.equals("MANIFEST.MF")) {
return true;
} else if (name.startsWith("SIG-")) {
// check filename extension
// see
http://docs.oracle.com/javase/7/docs/technotes/guides/jar/jar.html#Digital_Signatures
// for what filename extensions are legal
int extIndex = name.lastIndexOf('.');
if (extIndex != -1) {
String ext = name.substring(extIndex + 1);
// validate length first
if (ext.length() > 3 || ext.length() < 1) {
return false;
}
// then check chars, must be in [a-zA-Z0-9] per the jar spec
for (int index = 0; index < ext.length(); index++) {
char cc = ext.charAt(index);
// chars are promoted to uppercase so skip lowercase checks
if ((cc < 'A' || cc > 'Z') && (cc < '0' || cc > '9')) {
return false;
}
}
}
return true; // no extension is OK
}
return false;
}
> On Nov 7, 2016, at 9:16 AM, Alan Bateman <alan.bate...@oracle.com> wrote:
>
> On 07/11/2016 13:09, Jim Laskey (Oracle) wrote:
>
>> Thank you. Regarding SIG- I was just followed the spec.
>>
> I hope Sean or Max can jump in on this, the other question is .EC as I
> believe the JDK allows this when signing too.
>
> -Alan
