1 files changed, 83 insertions, 0 deletions
diff --git a/src/libs/7zip/unix/CPP/7zip/Crypto/Pbkdf2HmacSha1.cpp b/src/libs/7zip/unix/CPP/7zip/Crypto/Pbkdf2HmacSha1.cpp
new file mode 100644
index 000000000..cbbdec89d
--- /dev/null
+++ b/src/libs/7zip/unix/CPP/7zip/Crypto/Pbkdf2HmacSha1.cpp
@@ -0,0 +1,83 @@
+// Pbkdf2HmacSha1.cpp
+
+#include "StdAfx.h"
+
+#include "HmacSha1.h"
+
+namespace NCrypto {
+namespace NSha1 {
+
+void Pbkdf2Hmac(const Byte *pwd, size_t pwdSize, const Byte *salt, size_t saltSize,
+    UInt32 numIterations, Byte *key, size_t keySize)
+{
+  CHmac baseCtx;
+  baseCtx.SetKey(pwd, pwdSize);
+  for (UInt32 i = 1; keySize > 0; i++)
+  {
+    CHmac ctx = baseCtx;
+    ctx.Update(salt, saltSize);
+    Byte u[kDigestSize] = { (Byte)(i >> 24), (Byte)(i >> 16), (Byte)(i >> 8), (Byte)(i) };
+    const unsigned int curSize = (keySize < kDigestSize) ? (unsigned int)keySize : kDigestSize;
+    ctx.Update(u, 4);
+    ctx.Final(u, kDigestSize);
+
+    unsigned int s;
+    for (s = 0; s < curSize; s++)
+      key[s] = u[s];
+    
+    for (UInt32 j = numIterations; j > 1; j--)
+    {
+      ctx = baseCtx;
+      ctx.Update(u, kDigestSize);
+      ctx.Final(u, kDigestSize);
+      for (s = 0; s < curSize; s++)
+        key[s] ^= u[s];
+    }
+
+    key += curSize;
+    keySize -= curSize;
+  }
+}
+
+void Pbkdf2Hmac32(const Byte *pwd, size_t pwdSize, const UInt32 *salt, size_t saltSize,
+    UInt32 numIterations, UInt32 *key, size_t keySize)
+{
+  CHmac32 baseCtx;
+  baseCtx.SetKey(pwd, pwdSize);
+  for (UInt32 i = 1; keySize > 0; i++)
+  {
+    CHmac32 ctx = baseCtx;
+    ctx.Update(salt, saltSize);
+    UInt32 u[kDigestSizeInWords] = { i };
+    const unsigned int curSize = (keySize < kDigestSizeInWords) ? (unsigned int)keySize : kDigestSizeInWords;
+    ctx.Update(u, 1);
+    ctx.Final(u, kDigestSizeInWords);
+
+    // Speed-optimized code start
+    ctx = baseCtx;
+    ctx.GetLoopXorDigest(u, numIterations - 1);
+    // Speed-optimized code end
+    
+    unsigned int s;
+    for (s = 0; s < curSize; s++)
+      key[s] = u[s];
+    
+    /*
+    // Default code start
+    for (UInt32 j = numIterations; j > 1; j--)
+    {
+      ctx = baseCtx;
+      ctx.Update(u, kDigestSizeInWords);
+      ctx.Final(u, kDigestSizeInWords);
+      for (s = 0; s < curSize; s++)
+        key[s] ^= u[s];
+    }
+    // Default code end
+    */
+
+    key += curSize;
+    keySize -= curSize;
+  }
+}
+
+}}