FILE TYPE IDENTIFICATION METHOD AND FILE TYPE IDENTIFICATION DEVICE

摘要

The present invention discloses a method for identifying a file type and an apparatus for identifying a file type, so as to solve a problem in the prior art that a file type cannot be effectively identified when a sender tampers with a file being transmitted. The method includes: acquiring, from a transmitted data packet, a file header of a file to be identified, and determining whether a magic number of the file to be identified can be obtained from the file header; if the magic number of the file to be identified can be obtained, searching first correspondence between a file type and the magic number for the file type that corresponds to the magic number in the file header; determining whether data of the file to be identified complies with a data structure feature of the file type; if the data of the file to be identified complies with the data structure feature of the file type, determining that a file type of the file to be identified is the file type that corresponds to the magic number in the file header; and if the data of the file to be identified does not comply with the data structure feature of the file type, determining that a file type of the file to be identified is an abnormal type, where the abnormal type is used to indicate that the file to be identified is a file whose type has been tampered with.