1 files changed, 18 insertions, 0 deletions
diff --git a/src/pkg/crypto/des/des_test.go b/src/pkg/crypto/des/des_test.go
index e9fc23629..2e87e99b6 100644
--- a/src/pkg/crypto/des/des_test.go
+++ b/src/pkg/crypto/des/des_test.go
@@ -1503,3 +1503,21 @@ func TestSubstitutionTableKnownAnswerDecrypt(t *testing.T) {
 		}
 	}
 }
+
+func ExampleNewTripleDESCipher() {
+	// NewTripleDESCipher can also be used when EDE2 is required by
+	// duplicating the first 8 bytes of the 16-byte key.
+	ede2Key := []byte("example key 1234")
+
+	var tripleDESKey []byte
+	tripleDESKey = append(tripleDESKey, ede2Key[:16]...)
+	tripleDESKey = append(tripleDESKey, ede2Key[:8]...)
+
+	_, err := NewTripleDESCipher(tripleDESKey)
+	if err != nil {
+		panic(err)
+	}
+
+	// See crypto/cipher for how to use a cipher.Block for encryption and
+	// decryption.
+}