1 files changed, 10 insertions, 6 deletions

diff --git a/src/zip/file/info.rs b/src/zip/file/info.rs
index f5d4d8a..599dcc3 100644
--- a/src/zip/file/info.rs
+++ b/src/zip/file/info.rs
@@ -2,7 +2,7 @@ use crate::driver::ArchiveFileInfo;
 use crate::zip::{ZipError, ZipResult};
 use chrono::{DateTime, Local};
 
-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[derive(Debug, PartialEq, Eq, Clone)]
 pub enum CompressionMethod {
     Store,
     Deflate,
@@ -28,18 +28,22 @@ impl CompressionMethod {
     }
 }
 
-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[derive(Debug, PartialEq, Eq, Clone)]
 pub enum EncryptionMethod {
     None,
-    Weak,
+    Weak(u8),
     Unsupported,
 }
 
 impl EncryptionMethod {
-    pub(crate) fn from_bit_flag(bit_flag: BitFlag) -> EncryptionMethod {
+    pub(crate) fn from_bif_flag(bit_flag: BitFlag, crc: u32, dos_time: u16) -> EncryptionMethod {
         match (bit_flag.is_encrypted(), bit_flag.is_strong_encryption()) {
             (false, false) => EncryptionMethod::None,
-            (true, false) => EncryptionMethod::Weak,
+            (true, false) => EncryptionMethod::Weak(if bit_flag.is_has_data_descriptor() {
+                (dos_time >> 8) as u8 // Info-ZIP modification
+            } else {
+                (crc >> 24) as u8
+            }),
             (true, true) => EncryptionMethod::Unsupported,
             _ => panic!("impossible"),
         }
@@ -52,7 +56,7 @@ pub struct BitFlag {
 }
 
 pub mod bit {
-    #[derive(Debug, PartialEq, Eq, Clone, Copy)]
+    #[derive(Debug, PartialEq, Eq, Clone)]
     pub enum DeflateMode {
         Normal,
         Maximum,