/usr/share/doc/libganymed-ssh2-java/api/ch/ethz/ssh2/signature/ is in libganymed-ssh2-java 250-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libganymed-ssh2-java/api/ch/ethz/ssh2/signature/DSAPrivateKey.html
/usr/share/doc/libganymed-ssh2-java/api/ch/ethz/ssh2/signature/DSAPublicKey.html
/usr/share/doc/libganymed-ssh2-java/api/ch/ethz/ssh2/signature/DSASHA1Verify.html
/usr/share/doc/libganymed-ssh2-java/api/ch/ethz/ssh2/signature/DSASignature.html
/usr/share/doc/libganymed-ssh2-java/api/ch/ethz/ssh2/signature/RSAPrivateKey.html
/usr/share/doc/libganymed-ssh2-java/api/ch/ethz/ssh2/signature/RSAPublicKey.html
/usr/share/doc/libganymed-ssh2-java/api/ch/ethz/ssh2/signature/RSASHA1Verify.html
/usr/share/doc/libganymed-ssh2-java/api/ch/ethz/ssh2/signature/RSASignature.html
/usr/share/doc/libganymed-ssh2-java/api/ch/ethz/ssh2/signature/package-frame.html
/usr/share/doc/libganymed-ssh2-java/api/ch/ethz/ssh2/signature/package-summary.html
/usr/share/doc/libganymed-ssh2-java/api/ch/ethz/ssh2/signature/package-tree.html