[Backport] Fix for PemTrustConfigTests.testTrustConfigReloadsFileContents failur… #43613
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elastic#43539) The test `PemTrustConfigTests.testTrustConfigReloadsFileContents` failed intermittently with `ArrayIndexOutOfBoundsException` while parsing the randomly generated bytes array representing DER encoded stream. This seems to be a bug in JDK (once confirmed we can raise the bug in JDK bugs system). The problem arises when the `X509Factory#parseX509orPKCS7()` tries to [create `PKCS7` block](https://github.com/AdoptOpenJDK/openjdk-jdk11/blob/19fb8f93c59dfd791f62d41f332db9e306bc1422/src/java.base/share/classes/sun/security/provider/X509Factory.java#L460) from der encoded stream. While constructing PKCS7 block it tries to create `ContentInfo` type but fails to do so for the stream where the length after the DER SEQUENCE is 0. `DerInputStream#getSequence` [may return empty array of `DerValue`](https://github.com/AdoptOpenJDK/openjdk-jdk11/blob/19fb8f93c59dfd791f62d41f332db9e306bc1422/src/java.base/share/classes/sun/security/util/DerInputStream.java#L409..L412) but [the code in `ContentInfo`](https://github.com/AdoptOpenJDK/openjdk-jdk11/blob/19fb8f93c59dfd791f62d41f332db9e306bc1422/src/java.base/share/classes/sun/security/pkcs/ContentInfo.java#L135) does not check for the empty thereby throwing `ArrayIndexOutOfBoundsException`. Closes elastic#42509
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…e (#43539)
The test
PemTrustConfigTests.testTrustConfigReloadsFileContentsfailedintermittently with
ArrayIndexOutOfBoundsExceptionwhile parsingthe randomly generated bytes array representing DER encoded stream.
This seems to be a bug in JDK (once confirmed we can raise the bug
in JDK bugs system).
The problem arises when the
X509Factory#parseX509orPKCS7()tries tocreate
PKCS7block from der encoded stream. While constructing PKCS7block it tries to create
ContentInfotype but fails to do so for thestream where the length after the DER SEQUENCE is 0.
DerInputStream#getSequencemay return empty array ofDerValuebutthe code in
ContentInfodoes not check for the empty thereby throwingArrayIndexOutOfBoundsException.Closes #42509