Breaking up the expression (was too complex to be solved in reasonable time) #418

Sources/CryptoSwift/AES.swift

@@ -139,10 +139,14 @@ fileprivate extension AES {
         let rounds = self.variant.Nr
         let rk = self.expandedKey
 
-        var b0 = UInt32(block[block.startIndex + 0 + (0 << 2)]) << 0 | UInt32(block[block.startIndex + 1 + (0 << 2)]) << 8 | UInt32(block[block.startIndex + 2 + (0 << 2)]) << 16 | UInt32(block[block.startIndex + 3 + (0 << 2)]) << 24
-        var b1 = UInt32(block[block.startIndex + 0 + (1 << 2)]) << 0 | UInt32(block[block.startIndex + 1 + (1 << 2)]) << 8 | UInt32(block[block.startIndex + 2 + (1 << 2)]) << 16 | UInt32(block[block.startIndex + 3 + (1 << 2)]) << 24
-        var b2 = UInt32(block[block.startIndex + 0 + (2 << 2)]) << 0 | UInt32(block[block.startIndex + 1 + (2 << 2)]) << 8 | UInt32(block[block.startIndex + 2 + (2 << 2)]) << 16 | UInt32(block[block.startIndex + 3 + (2 << 2)]) << 24
-        var b3 = UInt32(block[block.startIndex + 0 + (3 << 2)]) << 0 | UInt32(block[block.startIndex + 1 + (3 << 2)]) << 8 | UInt32(block[block.startIndex + 2 + (3 << 2)]) << 16 | UInt32(block[block.startIndex + 3 + (3 << 2)]) << 24
+        var b0 = UInt32(block[block.startIndex + 0 + (0 << 2)]) << 0 | UInt32(block[block.startIndex + 1 + (0 << 2)]) << 8 | UInt32(block[block.startIndex + 2 + (0 << 2)]) << 16
+            b0 = b0 | UInt32(block[block.startIndex + 3 + (0 << 2)]) << 24
+        var b1 = UInt32(block[block.startIndex + 0 + (1 << 2)]) << 0 | UInt32(block[block.startIndex + 1 + (1 << 2)]) << 8 | UInt32(block[block.startIndex + 2 + (1 << 2)]) << 16
+            b1 = b1 | UInt32(block[block.startIndex + 3 + (1 << 2)]) << 24
+        var b2 = UInt32(block[block.startIndex + 0 + (2 << 2)]) << 0 | UInt32(block[block.startIndex + 1 + (2 << 2)]) << 8 | UInt32(block[block.startIndex + 2 + (2 << 2)]) << 16
+            b2 = b2 | UInt32(block[block.startIndex + 3 + (2 << 2)]) << 24
+        var b3 = UInt32(block[block.startIndex + 0 + (3 << 2)]) << 0 | UInt32(block[block.startIndex + 1 + (3 << 2)]) << 8 | UInt32(block[block.startIndex + 2 + (3 << 2)]) << 16
+            b3 = b3 | UInt32(block[block.startIndex + 3 + (3 << 2)]) << 24
 
         var t = Array<UInt32>(repeating: 0, count: 4)
 

Sources/CryptoSwift/MD5.swift

@@ -93,7 +93,8 @@ public final class MD5: DigestType {
 
             // break chunk into sixteen 32-bit words M[j], 0 ≤ j ≤ 15 and get M[g] value
             let gAdvanced = g << 2
-            let Mg = UInt32(chunk[chunk.startIndex + gAdvanced]) | UInt32(chunk[chunk.startIndex + gAdvanced &+ 1]) << 8 | UInt32(chunk[chunk.startIndex + gAdvanced &+ 2]) << 16 | UInt32(chunk[chunk.startIndex + gAdvanced &+ 3]) << 24
+            var Mg = UInt32(chunk[chunk.startIndex &+ gAdvanced]) | UInt32(chunk[chunk.startIndex &+ gAdvanced &+ 1]) << 8 | UInt32(chunk[chunk.startIndex &+ gAdvanced &+ 2]) << 16
+                Mg = Mg | UInt32(chunk[chunk.startIndex &+ gAdvanced &+ 3]) << 24
 
             B = B &+ rotateLeft(A &+ F &+ k[j] &+ Mg, by: s[j])
             A = dTemp