package hash

Import Path
	hash (on golang.org and go.dev)

Dependency Relation
	imports one package, and imported by 16 packages

Involved Source Files Package hash provides interfaces for hash functions.
Code Examples package main import ( "bytes" "crypto/sha256" "encoding" "fmt" "log" ) func main() { const ( input1 = "The tunneling gopher digs downwards, " input2 = "unaware of what he will find." ) first := sha256.New() first.Write([]byte(input1)) marshaler, ok := first.(encoding.BinaryMarshaler) if !ok { log.Fatal("first does not implement encoding.BinaryMarshaler") } state, err := marshaler.MarshalBinary() if err != nil { log.Fatal("unable to marshal hash:", err) } second := sha256.New() unmarshaler, ok := second.(encoding.BinaryUnmarshaler) if !ok { log.Fatal("second does not implement encoding.BinaryUnmarshaler") } if err := unmarshaler.UnmarshalBinary(state); err != nil { log.Fatal("unable to unmarshal hash:", err) } first.Write([]byte(input2)) second.Write([]byte(input2)) fmt.Printf("%x\n", first.Sum(nil)) fmt.Println(bytes.Equal(first.Sum(nil), second.Sum(nil))) }
Package-Level Type Names (total 3)
/* sort by: | */
Hash is the common interface implemented by all hash functions. Hash implementations in the standard library (e.g. hash/crc32 and crypto/sha256) implement the encoding.BinaryMarshaler and encoding.BinaryUnmarshaler interfaces. Marshaling a hash implementation allows its internal state to be saved and used for additional processing later, without having to re-write the data previously written to the hash. The hash state may contain portions of the input in its original form, which users are expected to handle for any possible security implications. Compatibility: Any future changes to hash or crypto packages will endeavor to maintain compatibility with state encoded using previous versions. That is, any released versions of the packages should be able to decode data written with any previously released version, subject to issues such as security fixes. See the Go compatibility document for background: https://golang.org/doc/go1compat BlockSize returns the hash's underlying block size. The Write method must be able to accept any amount of data, but it may operate more efficiently if all writes are a multiple of the block size. Reset resets the Hash to its initial state. Size returns the number of bytes Sum will return. Sum appends the current hash to b and returns the resulting slice. It does not change the underlying hash state. ( T) Write(p []byte) (n int, err error) Hash32 (interface) Hash64 (interface) *hash/maphash.Hash T : io.Writer func hash/fnv.New128() Hash func hash/fnv.New128a() Hash func crypto.Hash.New() Hash func crypto/hmac.New(h func() Hash, key []byte) Hash func crypto/md5.New() Hash func crypto/sha1.New() Hash func crypto/sha256.New() Hash func crypto/sha256.New224() Hash func crypto/sha512.New() Hash func crypto/sha512.New384() Hash func crypto/sha512.New512_224() Hash func crypto/sha512.New512_256() Hash func crypto/rsa.DecryptOAEP(hash Hash, random io.Reader, priv *rsa.PrivateKey, ciphertext []byte, label []byte) ([]byte, error) func crypto/rsa.EncryptOAEP(hash Hash, random io.Reader, pub *rsa.PublicKey, msg []byte, label []byte) ([]byte, error)
Hash32 is the common interface implemented by all 32-bit hash functions. BlockSize returns the hash's underlying block size. The Write method must be able to accept any amount of data, but it may operate more efficiently if all writes are a multiple of the block size. Reset resets the Hash to its initial state. Size returns the number of bytes Sum will return. Sum appends the current hash to b and returns the resulting slice. It does not change the underlying hash state. ( T) Sum32() uint32 ( T) Write(p []byte) (n int, err error) T : Hash T : io.Writer func hash/adler32.New() Hash32 func hash/crc32.New(tab *crc32.Table) Hash32 func hash/crc32.NewIEEE() Hash32 func hash/fnv.New32() Hash32 func hash/fnv.New32a() Hash32
Hash64 is the common interface implemented by all 64-bit hash functions. BlockSize returns the hash's underlying block size. The Write method must be able to accept any amount of data, but it may operate more efficiently if all writes are a multiple of the block size. Reset resets the Hash to its initial state. Size returns the number of bytes Sum will return. Sum appends the current hash to b and returns the resulting slice. It does not change the underlying hash state. ( T) Sum64() uint64 ( T) Write(p []byte) (n int, err error) *hash/maphash.Hash T : Hash T : io.Writer func hash/crc64.New(tab *crc64.Table) Hash64 func hash/fnv.New64() Hash64 func hash/fnv.New64a() Hash64