package azblob
import (
"crypto/hmac"
"crypto/sha256"
"encoding/base64"
)
// NewUserDelegationCredential creates a new UserDelegationCredential using a Storage account's name and a user delegation key from it
func NewUserDelegationCredential(accountName string, key UserDelegationKey) UserDelegationCredential {
return UserDelegationCredential{
accountName: accountName,
accountKey: key,
}
}
type UserDelegationCredential struct {
accountName string
accountKey UserDelegationKey
}
// AccountName returns the Storage account's name
func (f UserDelegationCredential) AccountName() string {
return f.accountName
}
// ComputeHMAC
func (f UserDelegationCredential) ComputeHMACSHA256(message string) (base64String string) {
bytes, _ := base64.StdEncoding.DecodeString(f.accountKey.Value)
h := hmac.New(sha256.New, bytes)
h.Write([]byte(message))
return base64.StdEncoding.EncodeToString(h.Sum(nil))
}
// Private method to return important parameters for NewSASQueryParameters
func (f UserDelegationCredential) getUDKParams() *UserDelegationKey {
return &f.accountKey
}