INNER CODE UNIT · Go

awsDeriveSigningKey

cc1a2b/JShunter · internal/jshunter/aws_pair.go:169

func awsDeriveSigningKey(secret, dateStr, region, service string) []byte {
	k := hmacBytes([]byte("AWS4"+secret), []byte(dateStr))
	k = hmacBytes(k, []byte(region))
	k = hmacBytes(k, []byte(service))
	return hmacBytes(k, []byte("aws4_request"))
}

func sha256Hex(b []byte) string {
	h := sha256.Sum256(b)
	return hex.EncodeToString(h[:])
}

func hmacBytes(key, msg []byte) []byte {
	m := hmac.New(sha256.New, key)
	m.Write(msg)
	return m.Sum(nil)
}

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