added iOS source code

[wl-app.git] / iOS / Pods / OAuthSwift / Sources / SHA1.swift

diff --git a/iOS/Pods/OAuthSwift/Sources/SHA1.swift b/iOS/Pods/OAuthSwift/Sources/SHA1.swift
new file mode 100644 (file)
index 0000000..f430a1d
--- /dev/null
+++ b/iOS/Pods/OAuthSwift/Sources/SHA1.swift
@@ -0,0 +1,152 @@
+//
+//  SHA1.swift
+//  OAuthSwift
+//
+//  Created by Dongri Jin on 1/28/15.
+//  Copyright (c) 2015 Dongri Jin. All rights reserved.
+//
+
+import Foundation
+
+class SHA1 {
+
+    private var message: [UInt8]
+
+    fileprivate let h: [UInt32] = [0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0]
+
+    init(_ message: Data) {
+        self.message = message.bytes
+    }
+    init(_ message: [UInt8]) {
+        self.message = message
+    }
+
+    /// Common part for hash calculation. Prepare header data.
+    func prepare(_ message: [UInt8], _ blockSize: Int, _ allowance: Int) -> [UInt8] {
+        var tmpMessage = message
+
+        // Step 1. Append Padding Bits
+        tmpMessage.append(0x80) // append one bit (Byte with one bit) to message
+
+        // append "0" bit until message length in bits ≡ 448 (mod 512)
+        var msgLength = tmpMessage.count
+        var counter = 0
+
+        while msgLength % blockSize != (blockSize - allowance) {
+            counter += 1
+            msgLength += 1
+        }
+
+        tmpMessage += [UInt8](repeating: 0, count: counter)
+
+        return tmpMessage
+    }
+
+    func calculate() -> [UInt8] {
+        var tmpMessage = self.prepare(self.message, 64, 64 / 8)
+
+        // hash values
+        var hh = h
+
+        // append message length, in a 64-bit big-endian integer. So now the message length is a multiple of 512 bits.
+        tmpMessage += (self.message.count * 8).bytes(64 / 8)
+
+        // Process the message in successive 512-bit chunks:
+        let chunkSizeBytes = 512 / 8 // 64
+        for chunk in BytesSequence(data: tmpMessage, chunkSize: chunkSizeBytes) {
+            // break chunk into sixteen 32-bit words M[j], 0 ≤ j ≤ 15, big-endian
+            // Extend the sixteen 32-bit words into eighty 32-bit words:
+            var M: [UInt32] = [UInt32](repeating: 0, count: 80)
+            for x in 0..<M.count {
+                switch x {
+                case 0...15:
+
+                    let memorySize = MemoryLayout<UInt32>.size
+                    let start = chunk.startIndex + (x * memorySize)
+                    let end = start + memorySize
+                    let le = chunk[start..<end].toUInt32
+                    M[x] = le.bigEndian
+                default:
+                    M[x] = rotateLeft(M[x-3] ^ M[x-8] ^ M[x-14] ^ M[x-16], n: 1)
+                }
+            }
+
+            var A = hh[0]
+            var B = hh[1]
+            var C = hh[2]
+            var D = hh[3]
+            var E = hh[4]
+
+            // Main loop
+            for j in 0...79 {
+                var f: UInt32 = 0
+                var k: UInt32 = 0
+
+                switch j {
+                case 0...19:
+                    f = (B & C) | ((~B) & D)
+                    k = 0x5A827999
+                case 20...39:
+                    f = B ^ C ^ D
+                    k = 0x6ED9EBA1
+                case 40...59:
+                    f = (B & C) | (B & D) | (C & D)
+                    k = 0x8F1BBCDC
+                case 60...79:
+                    f = B ^ C ^ D
+                    k = 0xCA62C1D6
+                default:
+                    break
+                }
+
+                let temp = (rotateLeft(A, n: 5) &+ f &+ E &+ M[j] &+ k) & 0xffffffff
+                E = D
+                D = C
+                C = rotateLeft(B, n: 30)
+                B = A
+                A = temp
+
+            }
+
+            hh[0] = (hh[0] &+ A) & 0xffffffff
+            hh[1] = (hh[1] &+ B) & 0xffffffff
+            hh[2] = (hh[2] &+ C) & 0xffffffff
+            hh[3] = (hh[3] &+ D) & 0xffffffff
+            hh[4] = (hh[4] &+ E) & 0xffffffff
+        }
+
+        // Produce the final hash value (big-endian) as a 160 bit number:
+        var result = [UInt8]()
+        result.reserveCapacity(hh.count / 4)
+        hh.forEach {
+            let item = $0.bigEndian
+            result += [UInt8(item & 0xff), UInt8((item >> 8) & 0xff), UInt8((item >> 16) & 0xff), UInt8((item >> 24) & 0xff)]
+        }
+
+        return result
+    }
+
+    private func rotateLeft(_ v: UInt32, n: UInt32) -> UInt32 {
+        return ((v << n) & 0xFFFFFFFF) | (v >> (32 - n))
+    }
+
+}
+
+private struct BytesSequence<D: RandomAccessCollection>: Sequence where D.Iterator.Element == UInt8, D.Index == Int {
+    let data: D
+    let chunkSize: Int
+
+    func makeIterator() -> AnyIterator<D.SubSequence> {
+        var offset = data.startIndex
+        return AnyIterator {
+            let end = Swift.min(self.chunkSize, self.data.count - offset)
+            let result = self.data[offset..<offset + end]
+            offset = offset.advanced(by: result.count)
+            if !result.isEmpty {
+                return result
+            }
+            return nil
+        }
+    }
+
+}