/
hash.go
executable file
·46 lines (34 loc) · 1 KB
/
hash.go
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package utility
import (
"crypto/sha512"
"encoding/hex"
"errors"
"hash/fnv"
"sync"
)
// FNV-1a is a not cryptographic hash function:
// 1) Fast to compute and designed for fast hash table.
// 2) Slightly better avalanche characteristics than FNV-1 hash function.
var FNV1AHashAlgorithm = fnv.New32a()
// Secure Hash Algorithm...
var SHA512cryptoHashAlgorithm = sha512.New()
var mutex = &sync.Mutex{}
func GenerateArrayIndexFromString(inputString string, arraySize uint) (uint, error) {
if inputString == "" {
return 0, errors.New("invalid input")
}
if _, err := FNV1AHashAlgorithm.Write([]byte(inputString)); err != nil {
return 0, err
}
defer FNV1AHashAlgorithm.Reset()
return uint(FNV1AHashAlgorithm.Sum32()) % arraySize, nil
}
func GenerateDigestUsingSHA512(data []byte) string {
mutex.Lock()
_, err := SHA512cryptoHashAlgorithm.Write(data)
CheckError(err)
output := hex.EncodeToString(SHA512cryptoHashAlgorithm.Sum(nil))
SHA512cryptoHashAlgorithm.Reset()
mutex.Unlock()
return output
}