sign function
sign function


Former-commit-id: a8f5dd410ca0b247c32893733e1937dfd8b033f7
Former-commit-id: 1a719b311d9aae62850e9c52f46b3ff4f6143f5e
Former-commit-id: ead4f5282cb3876fac53753136d16eb2044368ca
Former-commit-id: 7de9b69bdd0216ca18de13220a5d7c3bcdaa3648
imco/mte-v1.0,imco/mte-v1.0,imco/mte-v1.0