![]() > crc32hasher.verify_sfv("./lorem_ipsum.sfv") > sha512hasher.verify_checksums("./hashes.sha512") > md5hasher.hash_file("./testdata/lorem_ipsum.txt") The library can be used as follows: > import os This comes in useful when processing very large files to avoid having to read the entire file into memory all at once. Defaults to SHA256.Ĭhunk_size=4096 - Integer specifying the chunk size to use (in bytes) when reading the file. See filehash.SUPPORTED_ALGORITHMS for the list of supported hash / checksum algorithms. Hash_algorithm='sha256' - Specifies the hashing algorithm to use. The FileHash constructor has two optional arguments: This format is the format used by programs such as the sha1sum family of tools for generating checksum files. Returns a list of tuples where each tuple contains the filename and a boolean value indicating if the calculated hash matches the expected hash.įor the checksum file, the file is expected to be a plain text file where each line has an entry formatted as follows: Verify_checksums(checksum_filename) - Reads the specified file and calculates the hashes for the files listed, comparing the calculated hashes against the specified expected hashes. To find out more about SFV files, see the Simple file verification entry in Wikipedia. Returns a list of tuples where each tuple contains the filename and a boolean value indicating if the calculated CRC32 checksum matches the expected CRC32 checksum. Verify_sfv(sfv_filename) - Reads the specified SFV (Simple File Verification) file and calculates the CRC32 checksum for the files listed, comparing the calculated CRC32 checksums against the specified expected checksums. Files are sorted by their individual hash values and then traversed in that order to generate a combined hash value. Returns a string with the hex digest.Ĭathash_dir(path, pattern='*') - Calculate a single hash for an entire directory of files. Returns a list of tuples where each tuple contains the filename and the calculated hash.Ĭathash_files(filenames) - Calculate a single hash for multiple files. Hash_dir(path, pattern='*') - Calculate the file hashes for an entire directory. ![]() Returns a list of tuples where each tuple contains the filename and the calculated hash. ![]() Hash_files(filename) - Calculate the file hash for multiple files. Hash_file(filename) - Calculate the file hash for a single file. The FileHash class wraps around the hashlib (provides hashing for MD5, SHA-1, SHA-224, SHA-256, SHA-384 and SHA-512) and zlib (provides checksums for Adler-32 and CRC32) modules and contains the following methods: (Note: BLAKE2b and BLAKE2s are only supported on Python 3.6.x and later.) FileHash class Python module to facilitate calculating the checksum or hash of a file. ![]()
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