/usr/share/go-1.6/src/crypto/cipher/ is in golang-1.6-src 1.6.1-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/go-1.6/src/crypto/cipher/benchmark_test.go
/usr/share/go-1.6/src/crypto/cipher/cbc.go
/usr/share/go-1.6/src/crypto/cipher/cbc_aes_test.go
/usr/share/go-1.6/src/crypto/cipher/cfb.go
/usr/share/go-1.6/src/crypto/cipher/cfb_test.go
/usr/share/go-1.6/src/crypto/cipher/cipher.go
/usr/share/go-1.6/src/crypto/cipher/cipher_test.go
/usr/share/go-1.6/src/crypto/cipher/common_test.go
/usr/share/go-1.6/src/crypto/cipher/ctr.go
/usr/share/go-1.6/src/crypto/cipher/ctr_aes_test.go
/usr/share/go-1.6/src/crypto/cipher/ctr_test.go
/usr/share/go-1.6/src/crypto/cipher/example_test.go
/usr/share/go-1.6/src/crypto/cipher/gcm.go
/usr/share/go-1.6/src/crypto/cipher/gcm_test.go
/usr/share/go-1.6/src/crypto/cipher/io.go
/usr/share/go-1.6/src/crypto/cipher/ofb.go
/usr/share/go-1.6/src/crypto/cipher/ofb_test.go
/usr/share/go-1.6/src/crypto/cipher/xor.go
/usr/share/go-1.6/src/crypto/cipher/xor_test.go