Imported Upstream version 1.2.18upstream/1.2.18

1 files changed, 219 insertions, 0 deletions

diff --git a/examples/encrypt1.c b/examples/encrypt1.c
new file mode 100644
index 00000000..fb4d103f
--- /dev/null
+++ b/examples/encrypt1.c
@@ -0,0 +1,219 @@
+/** 
+ * XML Security Library example: Encrypting data using a template file.
+ * 
+ * Encrypts binary data using a template file and a DES key from a binary file
+ * 
+ * Usage: 
+ *      ./encrypt1 <xml-tmpl> <des-key-file> 
+ *
+ * Example:
+ *      ./encrypt1 encrypt1-tmpl.xml deskey.bin > encrypt1-res.xml
+ *
+ * The result could be decrypted with decrypt1 example:
+ *      ./decrypt1 encrypt1-res.xml deskey.bin
+ *
+ * This is free software; see Copyright file in the source
+ * distribution for preciese wording.
+ * 
+ * Copyright (C) 2002-2003 Aleksey Sanin <aleksey@aleksey.com>
+ */
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include <libxml/tree.h>
+#include <libxml/xmlmemory.h>
+#include <libxml/parser.h>
+
+#ifndef XMLSEC_NO_XSLT
+#include <libxslt/xslt.h>
+#include <libxslt/security.h>
+#endif /* XMLSEC_NO_XSLT */
+
+#include <xmlsec/xmlsec.h>
+#include <xmlsec/xmltree.h>
+#include <xmlsec/xmlenc.h>
+#include <xmlsec/crypto.h>
+
+int encrypt_file(const char* tmpl_file, const char* key_file, 
+                 const unsigned char* data, size_t dataSize);
+int 
+main(int argc, char **argv) {
+    static const char secret_data[] = "Big secret";
+#ifndef XMLSEC_NO_XSLT
+    xsltSecurityPrefsPtr xsltSecPrefs = NULL;
+#endif /* XMLSEC_NO_XSLT */
+
+    assert(argv);
+
+    if(argc != 3) {
+        fprintf(stderr, "Error: wrong number of arguments.\n");
+        fprintf(stderr, "Usage: %s <tmpl-file> <key-file>\n", argv[0]);
+        return(1);
+    }
+
+    /* Init libxml and libxslt libraries */
+    xmlInitParser();
+    LIBXML_TEST_VERSION
+    xmlLoadExtDtdDefaultValue = XML_DETECT_IDS | XML_COMPLETE_ATTRS;
+    xmlSubstituteEntitiesDefault(1);
+#ifndef XMLSEC_NO_XSLT
+    xmlIndentTreeOutput = 1; 
+#endif /* XMLSEC_NO_XSLT */
+
+    /* Init libxslt */
+#ifndef XMLSEC_NO_XSLT
+    /* disable everything */
+    xsltSecPrefs = xsltNewSecurityPrefs(); 
+    xsltSetSecurityPrefs(xsltSecPrefs,  XSLT_SECPREF_READ_FILE,        xsltSecurityForbid);
+    xsltSetSecurityPrefs(xsltSecPrefs,  XSLT_SECPREF_WRITE_FILE,       xsltSecurityForbid);
+    xsltSetSecurityPrefs(xsltSecPrefs,  XSLT_SECPREF_CREATE_DIRECTORY, xsltSecurityForbid);
+    xsltSetSecurityPrefs(xsltSecPrefs,  XSLT_SECPREF_READ_NETWORK,     xsltSecurityForbid);
+    xsltSetSecurityPrefs(xsltSecPrefs,  XSLT_SECPREF_WRITE_NETWORK,    xsltSecurityForbid);
+    xsltSetDefaultSecurityPrefs(xsltSecPrefs); 
+#endif /* XMLSEC_NO_XSLT */
+                
+    /* Init xmlsec library */
+    if(xmlSecInit() < 0) {
+        fprintf(stderr, "Error: xmlsec initialization failed.\n");
+        return(-1);
+    }
+
+    /* Check loaded library version */
+    if(xmlSecCheckVersion() != 1) {
+        fprintf(stderr, "Error: loaded xmlsec library version is not compatible.\n");
+        return(-1);
+    }
+
+    /* Load default crypto engine if we are supporting dynamic
+     * loading for xmlsec-crypto libraries. Use the crypto library
+     * name ("openssl", "nss", etc.) to load corresponding 
+     * xmlsec-crypto library.
+     */
+#ifdef XMLSEC_CRYPTO_DYNAMIC_LOADING
+    if(xmlSecCryptoDLLoadLibrary(BAD_CAST XMLSEC_CRYPTO) < 0) {
+        fprintf(stderr, "Error: unable to load default xmlsec-crypto library. Make sure\n"
+                        "that you have it installed and check shared libraries path\n"
+                        "(LD_LIBRARY_PATH) envornment variable.\n");
+        return(-1);     
+    }
+#endif /* XMLSEC_CRYPTO_DYNAMIC_LOADING */
+
+    /* Init crypto library */
+    if(xmlSecCryptoAppInit(NULL) < 0) {
+        fprintf(stderr, "Error: crypto initialization failed.\n");
+        return(-1);
+    }
+
+    /* Init xmlsec-crypto library */
+    if(xmlSecCryptoInit() < 0) {
+        fprintf(stderr, "Error: xmlsec-crypto initialization failed.\n");
+        return(-1);
+    }
+
+    if(encrypt_file(argv[1], argv[2], secret_data, strlen(secret_data)) < 0) {
+        return(-1);
+    }    
+    
+    /* Shutdown xmlsec-crypto library */
+    xmlSecCryptoShutdown();
+    
+    /* Shutdown crypto library */
+    xmlSecCryptoAppShutdown();
+    
+    /* Shutdown xmlsec library */
+    xmlSecShutdown();
+
+    /* Shutdown libxslt/libxml */
+#ifndef XMLSEC_NO_XSLT
+    xsltFreeSecurityPrefs(xsltSecPrefs);
+    xsltCleanupGlobals();            
+#endif /* XMLSEC_NO_XSLT */
+    xmlCleanupParser();
+    
+    return(0);
+}
+
+/**
+ * encrypt_file:
+ * @tmpl_file:          the encryption template file name.
+ * @key_file:           the Triple DES key file.
+ * @data:               the binary data to encrypt.
+ * @dataSize:           the binary data size.
+ *
+ * Encrypts binary #data using template from #tmpl_file and DES key from
+ * #key_file.
+ *
+ * Returns 0 on success or a negative value if an error occurs.
+ */
+int 
+encrypt_file(const char* tmpl_file, const char* key_file, 
+             const unsigned char* data, size_t dataSize) {
+    xmlDocPtr doc = NULL;
+    xmlNodePtr node = NULL;
+    xmlSecEncCtxPtr encCtx = NULL;
+    int res = -1;
+    
+    assert(tmpl_file);
+    assert(key_file);
+    assert(data);
+
+    /* load template */
+    doc = xmlParseFile(tmpl_file);
+    if ((doc == NULL) || (xmlDocGetRootElement(doc) == NULL)){
+        fprintf(stderr, "Error: unable to parse file \"%s\"\n", tmpl_file);
+        goto done;      
+    }
+    
+    /* find start node */
+    node = xmlSecFindNode(xmlDocGetRootElement(doc), xmlSecNodeEncryptedData, xmlSecEncNs);
+    if(node == NULL) {
+        fprintf(stderr, "Error: start node not found in \"%s\"\n", tmpl_file);
+        goto done;      
+    }
+
+    /* create encryption context, we don't need keys manager in this example */
+    encCtx = xmlSecEncCtxCreate(NULL);
+    if(encCtx == NULL) {
+        fprintf(stderr,"Error: failed to create encryption context\n");
+        goto done;
+    }
+
+    /* load DES key, assuming that there is not password */
+    encCtx->encKey = xmlSecKeyReadBinaryFile(xmlSecKeyDataDesId, key_file);
+    if(encCtx->encKey == NULL) {
+        fprintf(stderr,"Error: failed to load des key from binary file \"%s\"\n", key_file);
+        goto done;
+    }
+
+    /* set key name to the file name, this is just an example! */
+    if(xmlSecKeySetName(encCtx->encKey, key_file) < 0) {
+        fprintf(stderr,"Error: failed to set key name for key from \"%s\"\n", key_file);
+        goto done;
+    }
+
+    /* encrypt the data */
+    if(xmlSecEncCtxBinaryEncrypt(encCtx, node, data, dataSize) < 0) {
+        fprintf(stderr,"Error: encryption failed\n");
+        goto done;
+    }
+        
+    /* print encrypted data with document to stdout */
+    xmlDocDump(stdout, doc);
+    
+    /* success */
+    res = 0;
+
+done:    
+
+    /* cleanup */
+    if(encCtx != NULL) {
+        xmlSecEncCtxDestroy(encCtx);
+    }
+    
+    if(doc != NULL) {
+        xmlFreeDoc(doc); 
+    }
+    return(res);
+}
+