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(Unicode C) Encrypting and Decrypting ContentDemonstrates how to encrypt and decrypt the content of an XML node using 128-bit CBC AES encryption. The input XML, available at http://www.chilkatsoft.com/data/fox.xml, is this: <root> <fox1>The quick brown fox jumps over the lazy dog</fox1> <fox2>The quick brown fox jumps over the lazy dog <child1>ABC</child1> <child2>XYZ</child2> </fox2> </root>
#include <C_CkXmlW.h> void ChilkatSample(void) { HCkXmlW xml; BOOL success; xml = CkXmlW_Create(); // The sample input XML is available at http://www.chilkatsoft.com/data/fox.xml success = CkXmlW_LoadXmlFile(xml,L"fox.xml"); if (success != TRUE) { wprintf(L"%s\n",CkXmlW_lastErrorText(xml)); CkXmlW_Dispose(xml); return; } // Navigate to the "fox1" node, which is the 1st child: success = CkXmlW_FirstChild2(xml); // Encrypt the content: success = CkXmlW_EncryptContent(xml,L"myPassword"); // Navigate back to the root: CkXmlW_GetRoot2(xml); // Examine the new XML document: wprintf(L"%s\n",CkXmlW_getXml(xml)); // This is the XML w/ the encrypted content: /*<root> <fox1>1hTtf7XmO+78H+OIr5eWHIuXxP78KPeYrZbsD0HX4negO9ZRqYMBY4s46sPNp+Q+ </fox1> <fox2>The quick brown fox jumps over the lazy dog <child1>ABC</child1> <child2>XYZ</child2> </fox2> </root>*/ // Now decrypt and show that the original content was restored: success = CkXmlW_FirstChild2(xml); success = CkXmlW_DecryptContent(xml,L"myPassword"); CkXmlW_GetRoot2(xml); wprintf(L"%s\n",CkXmlW_getXml(xml)); // Now encrypt the content of the "fox2" node. // First navigate to the "fox2" child. success = CkXmlW_FindChild2(xml,L"fox2"); success = CkXmlW_EncryptContent(xml,L"myPassword"); CkXmlW_GetRoot2(xml); wprintf(L"%s\n",CkXmlW_getXml(xml)); // This is the XML w/ the "fox2" encrypted content: /*<root> <fox1>The quick brown fox jumps over the lazy dog</fox1> <fox2>1hTtf7XmO+78H+OIr5eWHIuXxP78KPeYrZbsD0HX4negO9ZRqYMBY4s46sPNp+Q+ <child1>ABC</child1> <child2>XYZ</child2> </fox2> </root>*/ // Notice that the *content* of the node is encrypted. The child nodes are NOT encrypted. // This is intentional. To encrypt the content + the subtrees rooted at a given node, // one would call ZipTree to transform the content and subtrees // to Base64-encoded compressed content, and then call // EncryptContent to encrypt. // Finally, decrypt the "fox2" content: success = CkXmlW_FindChild2(xml,L"fox2"); success = CkXmlW_DecryptContent(xml,L"myPassword"); CkXmlW_GetRoot2(xml); wprintf(L"%s\n",CkXmlW_getXml(xml)); CkXmlW_Dispose(xml); } |
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