/** * XML Security Library example: Signing a template file. * * Signs a template file using a key from PEM file * * Usage: * ./sign1 <xml-tmpl> <pem-key> * * Example: * ./sign1 sign1-tmpl.xml rsakey.pem > sign1-res.xml * * The result signature could be validated using verify1 example: * ./verify1 sign1-res.xml rsapub.pem * * 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> #endif /* XMLSEC_NO_XSLT */ #include <xmlsec/xmlsec.h> #include <xmlsec/xmltree.h> #include <xmlsec/xmldsig.h> #include <xmlsec/crypto.h> int sign_file(const char* tmpl_file, const char* key_file); int main(int argc, char **argv) { 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 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(sign_file(argv[1], argv[2]) < 0) { return(-1); } /* Shutdown xmlsec-crypto library */ xmlSecCryptoShutdown(); /* Shutdown crypto library */ xmlSecCryptoAppShutdown(); /* Shutdown xmlsec library */ xmlSecShutdown(); /* Shutdown libxslt/libxml */ #ifndef XMLSEC_NO_XSLT xsltCleanupGlobals(); #endif /* XMLSEC_NO_XSLT */ xmlCleanupParser(); return(0); } /** * sign_file: * @tmpl_file: the signature template file name. * @key_file: the PEM private key file name. * * Signs the #tmpl_file using private key from #key_file. * * Returns 0 on success or a negative value if an error occurs. */ int sign_file(const char* tmpl_file, const char* key_file) { xmlDocPtr doc = NULL; xmlNodePtr node = NULL; xmlSecDSigCtxPtr dsigCtx = NULL; int res = -1; assert(tmpl_file); assert(key_file); /* 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), xmlSecNodeSignature, xmlSecDSigNs); if(node == NULL) { fprintf(stderr, "Error: start node not found in \"%s\"\n", tmpl_file); goto done; } /* create signature context, we don't need keys manager in this example */ dsigCtx = xmlSecDSigCtxCreate(NULL); if(dsigCtx == NULL) { fprintf(stderr,"Error: failed to create signature context\n"); goto done; } /* load private key, assuming that there is not password */ dsigCtx->signKey = xmlSecCryptoAppKeyLoad(key_file, xmlSecKeyDataFormatPem, NULL, NULL, NULL); if(dsigCtx->signKey == NULL) { fprintf(stderr,"Error: failed to load private pem key from \"%s\"\n", key_file); goto done; } /* set key name to the file name, this is just an example! */ if(xmlSecKeySetName(dsigCtx->signKey, key_file) < 0) { fprintf(stderr,"Error: failed to set key name for key from \"%s\"\n", key_file); goto done; } /* sign the template */ if(xmlSecDSigCtxSign(dsigCtx, node) < 0) { fprintf(stderr,"Error: signature failed\n"); goto done; } /* print signed document to stdout */ xmlDocDump(stdout, doc); /* success */ res = 0; done: /* cleanup */ if(dsigCtx != NULL) { xmlSecDSigCtxDestroy(dsigCtx); } if(doc != NULL) { xmlFreeDoc(doc); } return(res); }
<?xml version="1.0" encoding="UTF-8"?> <!-- XML Security Library example: Simple signature template file for sign1 example. --> <Envelope xmlns="urn:envelope"> <Data> Hello, World! </Data> <Signature xmlns="http://www.w3.org/2000/09/xmldsig#"> <SignedInfo> <CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" /> <SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" /> <Reference URI=""> <Transforms> <Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" /> </Transforms> <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" /> <DigestValue></DigestValue> </Reference> </SignedInfo> <SignatureValue/> <KeyInfo> <KeyName/> </KeyInfo> </Signature> </Envelope>
<?xml version="1.0" encoding="UTF-8"?> <!-- XML Security Library example: Signed file (sign1 example). --> <Envelope xmlns="urn:envelope"> <Data> Hello, World! </Data> <Signature xmlns="http://www.w3.org/2000/09/xmldsig#"> <SignedInfo> <CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/> <SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/> <Reference URI=""> <Transforms> <Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/> </Transforms> <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/> <DigestValue>9H/rQr2Axe9hYTV2n/tCp+3UIQQ=</DigestValue> </Reference> </SignedInfo> <SignatureValue>Mx4psIy9/UY+u8QBJRDrwQWKRaCGz0WOVftyDzAe6WHAFSjMNr7qb2ojq9kdipT8 Oub5q2OQ7mzdSLiiejkrO1VeqM/90yEIGI4En6KEB6ArEzw+iq4N1wm6EptcyxXx M9StAOOa9ilWYqR9Tfx3SW1urUIuKYgUitxsONiUHBVaW6HeX51bsXoTF++4ZI+D jiPBjN4HHmr0cbJ6BXk91S27ffZIfp1Qj5nL9onFLUGbR6EFgu2luiRzQbPuM2tP XxyI7GZ8AfHnRJK28ARvBC9oi+O1ej20S79CIV7gdBxbLbFprozBHAwOEC57YgJc x+YEjSjcO7SBIR1FiUA7pw==</SignatureValue> <KeyInfo> <KeyName>rsakey.pem</KeyName> </KeyInfo> </Signature> </Envelope>
Aleksey Sanin