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Diffstat (limited to 'examples/verify1.c')
| -rw-r--r-- | examples/verify1.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/examples/verify1.c b/examples/verify1.c new file mode 100644 index 00000000..04917e5a --- /dev/null +++ b/examples/verify1.c @@ -0,0 +1,215 @@ +/** + * XML Security Library example: Verifying a file using a single key. + * + * Verifies a file using a key from PEM file. + * + * Usage: + * verify1 <signed-file> <pem-key> + * + * Example: + * ./verify1 sign1-res.xml rsapub.pem + * ./verify1 sign2-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> +#include <libxslt/security.h> +#endif /* XMLSEC_NO_XSLT */ + +#include <xmlsec/xmlsec.h> +#include <xmlsec/xmltree.h> +#include <xmlsec/xmldsig.h> +#include <xmlsec/crypto.h> + +int verify_file(const char* xml_file, const char* key_file); + +int +main(int argc, char **argv) { +#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 <xml-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(verify_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 + xsltFreeSecurityPrefs(xsltSecPrefs); + xsltCleanupGlobals(); +#endif /* XMLSEC_NO_XSLT */ + xmlCleanupParser(); + + return(0); +} + +/** + * verify_file: + * @xml_file: the signed XML file name. + * @key_file: the PEM public key file name. + * + * Verifies XML signature in #xml_file using public key from #key_file. + * + * Returns 0 on success or a negative value if an error occurs. + */ +int +verify_file(const char* xml_file, const char* key_file) { + xmlDocPtr doc = NULL; + xmlNodePtr node = NULL; + xmlSecDSigCtxPtr dsigCtx = NULL; + int res = -1; + + assert(xml_file); + assert(key_file); + + /* load file */ + doc = xmlParseFile(xml_file); + if ((doc == NULL) || (xmlDocGetRootElement(doc) == NULL)){ + fprintf(stderr, "Error: unable to parse file \"%s\"\n", xml_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", xml_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 public key */ + dsigCtx->signKey = xmlSecCryptoAppKeyLoad(key_file, xmlSecKeyDataFormatPem, NULL, NULL, NULL); + if(dsigCtx->signKey == NULL) { + fprintf(stderr,"Error: failed to load public 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; + } + + /* Verify signature */ + if(xmlSecDSigCtxVerify(dsigCtx, node) < 0) { + fprintf(stderr,"Error: signature verify\n"); + goto done; + } + + /* print verification result to stdout */ + if(dsigCtx->status == xmlSecDSigStatusSucceeded) { + fprintf(stdout, "Signature is OK\n"); + } else { + fprintf(stdout, "Signature is INVALID\n"); + } + + /* success */ + res = 0; + +done: + /* cleanup */ + if(dsigCtx != NULL) { + xmlSecDSigCtxDestroy(dsigCtx); + } + + if(doc != NULL) { + xmlFreeDoc(doc); + } + return(res); +} + + |