hash

Documentation

Index

• func ChecksumCopy(dst io.Writer, src io.Reader) (int64, []byte, error)
• func ChecksumFrom(r io.Reader, hasher hash.Hash) (int64, []byte, error)
• func Modulo(sha string, num int) int
• func Sha256Checksum(r io.Reader) ([]byte, error)
• func Values(objects ...interface{}) string

Functions

func ChecksumCopy

func ChecksumCopy(dst io.Writer, src io.Reader) (int64, []byte, error)

ChecksumCopy will do the same as io.Copy, but also returns a sha256 checksum for the data read

func ChecksumFrom

func ChecksumFrom(r io.Reader, hasher hash.Hash) (int64, []byte, error)

ChecksumFrom will read all of r 8096 bytes at a time into hasher and return the sum

func Modulo

func Modulo(sha string, num int) int

Modulo returns the modulo of sha value into num

func Sha256Checksum

func Sha256Checksum(r io.Reader) ([]byte, error)

Sha256Checksum will return a sha256 checksum of r

func Values

func Values(objects ...interface{}) string

Values will convert all objects to a string and return a SHA256 of the concatenated values. Uses xxhash to calculate a faster hash value that is not cryptographically secure but is OK since we use hashing mainfully for generating consistent key values or equality checks.