CryptoProvider.CanDecrypt Properti

Definisi

Ruang nama:

System.Security.RightsManagement

Rakitan:

WindowsBase.dll

Mendapatkan nilai yang menunjukkan apakah pengguna memiliki hak untuk mendekripsi.

public:
 property bool CanDecrypt { bool get(); };

public bool CanDecrypt { get; }

member this.CanDecrypt : bool

Public ReadOnly Property CanDecrypt As Boolean

Nilai Properti

Boolean

true UseLicense jika memberikan hak pengguna untuk mendekripsi; jika tidak, false.

Contoh

Contoh berikut menunjukkan cara menggunakan CanDecrypt properti untuk menentukan apakah dekripsi diizinkan.

ShowStatus("   Binding UseLicense with the SecureEnvironment" +
         "\n       to obtain the CryptoProvider.");
CryptoProvider cryptoProvider = useLicense.Bind(_secureEnv);

ShowStatus("   Obtaining BoundGrants.");
ReadOnlyCollection<ContentGrant> grants =
    cryptoProvider.BoundGrants;

rightsBlockTitle.Text = "Rights - " + Filename(useLicenseFile);
rightsBlock.Text = "GRANTS LIST\n-----------------\n";
foreach (ContentGrant grant in grants)
{
    rightsBlock.Text += "USER:  " + grant.User.Name + " [" +
        grant.User.AuthenticationType + "]\n";
    rightsBlock.Text += "RIGHT: " + grant.Right.ToString() + "\n";
    rightsBlock.Text += "    From:  " + grant.ValidFrom + "\n";
    rightsBlock.Text += "    Until: " + grant.ValidUntil + "\n";
}

if (cryptoProvider.CanDecrypt)
    ShowStatus("   Decryption granted.");
else
    ShowStatus("   CANNOT DECRYPT!");

ShowStatus("   Binding UseLicense with the SecureEnvironment" & vbLf & "       to obtain the CryptoProvider.")
Dim cryptoProvider As CryptoProvider = useLicense.Bind(_secureEnv)

ShowStatus("   Obtaining BoundGrants.")
Dim grants As ReadOnlyCollection(Of ContentGrant) = cryptoProvider.BoundGrants

rightsBlockTitle.Text = "Rights - " & Filename(useLicenseFile)
rightsBlock.Text = "GRANTS LIST" & vbLf & "-----------------" & vbLf
For Each grant As ContentGrant In grants
    rightsBlock.Text &= "USER:  " & grant.User.Name & " [" & grant.User.AuthenticationType & "]" & vbLf
    rightsBlock.Text &= "RIGHT: " & grant.Right.ToString() & vbLf
    rightsBlock.Text &= "    From:  " & grant.ValidFrom & vbLf
    rightsBlock.Text &= "    Until: " & grant.ValidUntil & vbLf
Next grant

If cryptoProvider.CanDecrypt = True Then
    ShowStatus("   Decryption granted.")
Else
    ShowStatus("   CANNOT DECRYPT!")
End If

Keterangan

CanDecrypt true mengembalikan jika terikat UseLicense ke ini CryptoProvider memberikan hak akses baca pengguna seperti Tampilan, Edit, Cetak, atau Pemilik.

Lihat juga

• CanEncrypt
• Bind(SecureEnvironment)