38 lines
939 B
Go
38 lines
939 B
Go
// Copyright 2017 Frédéric Guillot. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package helper
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import (
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"crypto/rand"
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"crypto/sha256"
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"encoding/base64"
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"fmt"
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)
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// HashFromBytes returns a SHA-256 checksum of the input.
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func HashFromBytes(value []byte) string {
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sum := sha256.Sum256(value)
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return fmt.Sprintf("%x", sum)
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}
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// Hash returns a SHA-256 checksum of a string.
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func Hash(value string) string {
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return HashFromBytes([]byte(value))
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}
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// GenerateRandomBytes returns random bytes.
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func GenerateRandomBytes(size int) []byte {
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b := make([]byte, size)
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if _, err := rand.Read(b); err != nil {
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panic(fmt.Errorf("Unable to generate random string: %v", err))
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}
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return b
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}
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// GenerateRandomString returns a random string.
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func GenerateRandomString(size int) string {
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return base64.URLEncoding.EncodeToString(GenerateRandomBytes(size))
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}
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