diff --git a/tools/ziptime/ZipEntry.cpp b/tools/ziptime/ZipEntry.cpp
new file mode 100644
index 0000000..bdbdd32
--- /dev/null
+++ b/tools/ziptime/ZipEntry.cpp
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2006 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+// Access to entries in a Zip archive.
+//
+
+#include "ZipEntry.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+using namespace android;
+
+#define LOG(...) fprintf(stderr, __VA_ARGS__)
+
+/* Jan 01 2008 */
+#define STATIC_DATE (28 << 9 | 1 << 5 | 1)
+#define STATIC_TIME 0
+
+/*
+ * Initialize a new ZipEntry structure from a FILE* positioned at a
+ * CentralDirectoryEntry. Rewrites the headers to remove the dynamic
+ * timestamps.
+ *
+ * On exit, the file pointer will be at the start of the next CDE or
+ * at the EOCD.
+ */
+status_t ZipEntry::initAndRewriteFromCDE(FILE* fp)
+{
+    status_t result;
+    long posn;
+
+    /* read the CDE */
+    result = mCDE.rewrite(fp);
+    if (result != 0) {
+        LOG("mCDE.rewrite failed\n");
+        return result;
+    }
+
+    /* using the info in the CDE, go load up the LFH */
+    posn = ftell(fp);
+    if (fseek(fp, mCDE.mLocalHeaderRelOffset, SEEK_SET) != 0) {
+        LOG("local header seek failed (%ld)\n",
+            mCDE.mLocalHeaderRelOffset);
+        return -1;
+    }
+
+    result = mLFH.rewrite(fp);
+    if (result != 0) {
+        LOG("mLFH.rewrite failed\n");
+        return result;
+    }
+
+    if (fseek(fp, posn, SEEK_SET) != 0)
+        return -1;
+
+    return 0;
+}
+
+/*
+ * ===========================================================================
+ *      ZipEntry::LocalFileHeader
+ * ===========================================================================
+ */
+
+/*
+ * Rewrite a local file header.
+ *
+ * On entry, "fp" points to the signature at the start of the header.
+ */
+status_t ZipEntry::LocalFileHeader::rewrite(FILE* fp)
+{
+    status_t result = 0;
+    unsigned char buf[kLFHLen];
+
+    if (fread(buf, 1, kLFHLen, fp) != kLFHLen)
+        return -1;
+
+    if (ZipEntry::getLongLE(&buf[0x00]) != kSignature) {
+        LOG("whoops: didn't find expected signature\n");
+        return -1;
+    }
+
+    ZipEntry::putShortLE(&buf[0x0a], STATIC_TIME);
+    ZipEntry::putShortLE(&buf[0x0c], STATIC_DATE);
+
+    if (fseek(fp, -kLFHLen, SEEK_CUR) != 0)
+        return -1;
+
+    if (fwrite(buf, 1, kLFHLen, fp) != kLFHLen)
+        return -1;
+
+    return 0;
+}
+
+/*
+ * ===========================================================================
+ *      ZipEntry::CentralDirEntry
+ * ===========================================================================
+ */
+
+/*
+ * Read and rewrite the central dir entry that appears next in the file.
+ *
+ * On entry, "fp" should be positioned on the signature bytes for the
+ * entry.  On exit, "fp" will point at the signature word for the next
+ * entry or for the EOCD.
+ */
+status_t ZipEntry::CentralDirEntry::rewrite(FILE* fp)
+{
+    status_t result = 0;
+    unsigned char buf[kCDELen];
+    unsigned short fileNameLength, extraFieldLength, fileCommentLength;
+
+    if (fread(buf, 1, kCDELen, fp) != kCDELen)
+        return -1;
+
+    if (ZipEntry::getLongLE(&buf[0x00]) != kSignature) {
+        LOG("Whoops: didn't find expected signature\n");
+        return -1;
+    }
+
+    ZipEntry::putShortLE(&buf[0x0c], STATIC_TIME);
+    ZipEntry::putShortLE(&buf[0x0e], STATIC_DATE);
+
+    fileNameLength = ZipEntry::getShortLE(&buf[0x1c]);
+    extraFieldLength = ZipEntry::getShortLE(&buf[0x1e]);
+    fileCommentLength = ZipEntry::getShortLE(&buf[0x20]);
+    mLocalHeaderRelOffset = ZipEntry::getLongLE(&buf[0x2a]);
+
+    if (fseek(fp, -kCDELen, SEEK_CUR) != 0)
+        return -1;
+
+    if (fwrite(buf, 1, kCDELen, fp) != kCDELen)
+        return -1;
+
+    if (fseek(fp, fileNameLength + extraFieldLength + fileCommentLength, SEEK_CUR) != 0)
+        return -1;
+
+    return 0;
+}