github.com/enetx/g@v1.0.80/string_hash.go (about) 1 package g 2 3 import ( 4 "crypto/md5" 5 "crypto/sha1" 6 "crypto/sha256" 7 "crypto/sha512" 8 "encoding/hex" 9 "hash" 10 ) 11 12 // A struct that wraps an String for hashing. 13 type shash struct{ str String } 14 15 // Hash returns a shash struct wrapping the given String. 16 func (s String) Hash() shash { return shash{s} } 17 18 // MD5 computes the MD5 hash of the wrapped String and returns the hash as an String. 19 func (sh shash) MD5() String { return stringHasher(md5.New(), sh.str) } 20 21 // SHA1 computes the SHA1 hash of the wrapped String and returns the hash as an String. 22 func (sh shash) SHA1() String { return stringHasher(sha1.New(), sh.str) } 23 24 // SHA256 computes the SHA256 hash of the wrapped String and returns the hash as an String. 25 func (sh shash) SHA256() String { return stringHasher(sha256.New(), sh.str) } 26 27 // SHA512 computes the SHA512 hash of the wrapped String and returns the hash as an String. 28 func (sh shash) SHA512() String { return stringHasher(sha512.New(), sh.str) } 29 30 // stringHasher a helper function that computes the hash of the given String using the specified 31 // hash.Hash algorithm and returns the hash as an String. 32 func stringHasher(algorithm hash.Hash, hstr String) String { 33 _, _ = algorithm.Write(hstr.ToBytes()) 34 return String(hex.EncodeToString(algorithm.Sum(nil))) 35 }