我尝试从c脚本验证x509签名，但我无法弄清楚我错过了什么才能成功编译它。
我使用 Ubuntu 13.10、xmlsec1 1.2.18（openssl）、libxml2 2.9.1。
我尝试了什么：
gcc -I/usr/include/xmlsec1 -I/usr/include/libxml2 -o xmlsec-verify-with-X509 xmlsec-verify-with-X509.c
但我得到：
In file included from xmlsec-verify-with-X509.c:39:0:
/usr/include/xmlsec1/xmlsec/crypto.h:59:2: error: #error No crypto library defined
#error No crypto library defined
^
crypto.h 文件直到第 59 行：
#ifdef XMLSEC_CRYPTO_DYNAMIC_LOADING
#include <xmlsec/app.h>
#else /* XMLSEC_CRYPTO_DYNAMIC_LOADING */
#ifdef XMLSEC_CRYPTO_OPENSSL
#include <xmlsec/openssl/app.h>
#include <xmlsec/openssl/crypto.h>
#include <xmlsec/openssl/x509.h>
#include <xmlsec/openssl/symbols.h>
#else /* XMLSEC_CRYPTO_OPENSSL */
#ifdef XMLSEC_CRYPTO_MSCRYPTO
#include <xmlsec/mscrypto/app.h>
#include <xmlsec/mscrypto/crypto.h>
#include <xmlsec/mscrypto/x509.h>
#include <xmlsec/mscrypto/symbols.h>
#else /* XMLSEC_CRYPTO_MSCRYPTO */
#ifdef XMLSEC_CRYPTO_NSS
#include <xmlsec/nss/app.h>
#include <xmlsec/nss/crypto.h>
#include <xmlsec/openssl/x509.h>
#include <xmlsec/nss/symbols.h>
#else /* XMLSEC_CRYPTO_NSS */
#ifdef XMLSEC_CRYPTO_GNUTLS
#include <xmlsec/gnutls/app.h>
#include <xmlsec/gnutls/crypto.h>
#include <xmlsec/gnutls/symbols.h>
#else /* XMLSEC_CRYPTO_GNUTLS */
#ifdef XMLSEC_CRYPTO_GCRYPT
#include <xmlsec/gcrypt/app.h>
#include <xmlsec/gcrypt/crypto.h>
#include <xmlsec/gcrypt/symbols.h>
#else /* XMLSEC_CRYPTO_GCRYPT */
#error No crypto library defined
该脚本来自http://www.aleksey.com/xmlsec/api/xmlsec-verify-with-x509.html：
#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>
xmlSecKeysMngrPtr load_trusted_certs(char** files, int files_size);
int verify_file(xmlSecKeysMngrPtr mngr, const char* xml_file);
int
main(int argc, char **argv) {
#ifndef XMLSEC_NO_XSLT
xsltSecurityPrefsPtr xsltSecPrefs = NULL;
#endif /* XMLSEC_NO_XSLT */
xmlSecKeysMngrPtr mngr;
assert(argv);
if(argc < 3) {
fprintf(stderr, "Error: wrong number of arguments.\n");
fprintf(stderr, "Usage: %s <xml-file> <cert-file1> [<cert-file2> [...]]\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);
}
/* create keys manager and load trusted certificates */
mngr = load_trusted_certs(&(argv[2]), argc - 2);
if(mngr == NULL) {
return(-1);
}
/* verify file */
if(verify_file(mngr, argv[1]) < 0) {
xmlSecKeysMngrDestroy(mngr);
return(-1);
}
/* destroy keys manager */
xmlSecKeysMngrDestroy(mngr);
/* 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);
}
/**
* load_trusted_certs:
* @files: the list of filenames.
* @files_size: the number of filenames in #files.
*
* Creates simple keys manager and load trusted certificates from PEM #files.
* The caller is responsible for destroing returned keys manager using
* @xmlSecKeysMngrDestroy.
*
* Returns the pointer to newly created keys manager or NULL if an error
* occurs.
*/
xmlSecKeysMngrPtr
load_trusted_certs(char** files, int files_size) {
xmlSecKeysMngrPtr mngr;
int i;
assert(files);
assert(files_size > 0);
/* create and initialize keys manager, we use a simple list based
* keys manager, implement your own xmlSecKeysStore klass if you need
* something more sophisticated
*/
mngr = xmlSecKeysMngrCreate();
if(mngr == NULL) {
fprintf(stderr, "Error: failed to create keys manager.\n");
return(NULL);
}
if(xmlSecCryptoAppDefaultKeysMngrInit(mngr) < 0) {
fprintf(stderr, "Error: failed to initialize keys manager.\n");
xmlSecKeysMngrDestroy(mngr);
return(NULL);
}
for(i = 0; i < files_size; ++i) {
assert(files[i]);
/* load trusted cert */
if(xmlSecCryptoAppKeysMngrCertLoad(mngr, files[i], xmlSecKeyDataFormatPem, xmlSecKeyDataTypeTrusted) < 0) {
fprintf(stderr,"Error: failed to load pem certificate from \"%s\"\n", files[i]);
xmlSecKeysMngrDestroy(mngr);
return(NULL);
}
}
return(mngr);
}
/**
* verify_file:
* @mngr: the pointer to keys manager.
* @xml_file: the signed XML file name.
*
* Verifies XML signature in #xml_file.
*
* Returns 0 on success or a negative value if an error occurs.
*/
int
verify_file(xmlSecKeysMngrPtr mngr, const char* xml_file) {
xmlDocPtr doc = NULL;
xmlNodePtr node = NULL;
xmlSecDSigCtxPtr dsigCtx = NULL;
int res = -1;
assert(mngr);
assert(xml_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 */
dsigCtx = xmlSecDSigCtxCreate(mngr);
if(dsigCtx == NULL) {
fprintf(stderr,"Error: failed to create signature context\n");
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);
}
编辑1：
如果我尝试-DXMLSEC_CRYPTO_OPENSSL
$ gcc -DXMLSEC_CRYPTO_OPENSSL -I/usr/include/xmlsec1 -I/usr/include/libxml2 -o xmlsec-verify-with-X509 xmlsec-verify-with-X509.c
/tmp/ccBwmeSC.o: In function `main':
xmlsec-verify-with-X509.c:(.text+0x86): undefined reference to `xmlInitParser'
xmlsec-verify-with-X509.c:(.text+0x90): undefined reference to `xmlCheckVersion'
xmlsec-verify-with-X509.c:(.text+0x95): undefined reference to `__xmlLoadExtDtdDefaultValue'
xmlsec-verify-with-X509.c:(.text+0xa5): undefined reference to `xmlSubstituteEntitiesDefault'
xmlsec-verify-with-X509.c:(.text+0xaa): undefined reference to `__xmlIndentTreeOutput'
xmlsec-verify-with-X509.c:(.text+0xb5): undefined reference to `xsltNewSecurityPrefs'
xmlsec-verify-with-X509.c:(.text+0xc2): undefined reference to `xsltSecurityForbid'
xmlsec-verify-with-X509.c:(.text+0xcf): undefined reference to `xsltSetSecurityPrefs'
xmlsec-verify-with-X509.c:(.text+0xd8): undefined reference to `xsltSecurityForbid'
xmlsec-verify-with-X509.c:(.text+0xe5): undefined reference to `xsltSetSecurityPrefs'
xmlsec-verify-with-X509.c:(.text+0xee): undefined reference to `xsltSecurityForbid'
xmlsec-verify-with-X509.c:(.text+0xfb): undefined reference to `xsltSetSecurityPrefs'
xmlsec-verify-with-X509.c:(.text+0x104): undefined reference to `xsltSecurityForbid'
xmlsec-verify-with-X509.c:(.text+0x111): undefined reference to `xsltSetSecurityPrefs'
xmlsec-verify-with-X509.c:(.text+0x11a): undefined reference to `xsltSecurityForbid'
xmlsec-verify-with-X509.c:(.text+0x127): undefined reference to `xsltSetSecurityPrefs'
xmlsec-verify-with-X509.c:(.text+0x133): undefined reference to `xsltSetDefaultSecurityPrefs'
xmlsec-verify-with-X509.c:(.text+0x138): undefined reference to `xmlSecInit'
xmlsec-verify-with-X509.c:(.text+0x17d): undefined reference to `xmlSecCheckVersionExt'
xmlsec-verify-with-X509.c:(.text+0x1b4): undefined reference to `xmlSecOpenSSLAppInit'
xmlsec-verify-with-X509.c:(.text+0x1e5): undefined reference to `xmlSecOpenSSLInit'
xmlsec-verify-with-X509.c:(.text+0x265): undefined reference to `xmlSecKeysMngrDestroy'
xmlsec-verify-with-X509.c:(.text+0x278): undefined reference to `xmlSecKeysMngrDestroy'
xmlsec-verify-with-X509.c:(.text+0x27d): undefined reference to `xmlSecOpenSSLShutdown'
xmlsec-verify-with-X509.c:(.text+0x282): undefined reference to `xmlSecOpenSSLAppShutdown'
xmlsec-verify-with-X509.c:(.text+0x287): undefined reference to `xmlSecShutdown'
xmlsec-verify-with-X509.c:(.text+0x293): undefined reference to `xsltFreeSecurityPrefs'
xmlsec-verify-with-X509.c:(.text+0x298): undefined reference to `xsltCleanupGlobals'
xmlsec-verify-with-X509.c:(.text+0x29d): undefined reference to `xmlCleanupParser'
/tmp/ccBwmeSC.o: In function `load_trusted_certs':
xmlsec-verify-with-X509.c:(.text+0x2f7): undefined reference to `xmlSecKeysMngrCreate'
xmlsec-verify-with-X509.c:(.text+0x336): undefined reference to `xmlSecOpenSSLAppDefaultKeysMngrInit'
xmlsec-verify-with-X509.c:(.text+0x364): undefined reference to `xmlSecKeysMngrDestroy'
xmlsec-verify-with-X509.c:(.text+0x3dc): undefined reference to `xmlSecOpenSSLAppKeysMngrCertLoad'
xmlsec-verify-with-X509.c:(.text+0x41c): undefined reference to `xmlSecKeysMngrDestroy'
/tmp/ccBwmeSC.o: In function `verify_file':
xmlsec-verify-with-X509.c:(.text+0x4b4): undefined reference to `xmlParseFile'
xmlsec-verify-with-X509.c:(.text+0x4cb): undefined reference to `xmlDocGetRootElement'
xmlsec-verify-with-X509.c:(.text+0x4fe): undefined reference to `xmlDocGetRootElement'
xmlsec-verify-with-X509.c:(.text+0x503): undefined reference to `xmlSecDSigNs'
xmlsec-verify-with-X509.c:(.text+0x508): undefined reference to `xmlSecNodeSignature'
xmlsec-verify-with-X509.c:(.text+0x510): undefined reference to `xmlSecFindNode'
xmlsec-verify-with-X509.c:(.text+0x549): undefined reference to `xmlSecDSigCtxCreate'
xmlsec-verify-with-X509.c:(.text+0x58a): undefined reference to `xmlSecDSigCtxVerify'
xmlsec-verify-with-X509.c:(.text+0x615): undefined reference to `xmlSecDSigCtxDestroy'
xmlsec-verify-with-X509.c:(.text+0x628): undefined reference to `xmlFreeDoc'
collect2: error: ld returned 1 exit status
和-DXMLSEC_CRYPTO_DYNAMIC_LOADING
$ gcc -DXMLSEC_CRYPTO_DYNAMIC_LOADING -I/usr/include/xmlsec1 -I/usr/include/libxml2 -o xmlsec-verify-with-X509 xmlsec-verify-with-X509.c
xmlsec-verify-with-X509.c: In function 'main':
xmlsec-verify-with-X509.c:76:43: error: 'XMLSEC_CRYPTO' undeclared (first use in this function)
if(xmlSecCryptoDLLoadLibrary(BAD_CAST XMLSEC_CRYPTO) < 0) {
^
xmlsec-verify-with-X509.c:76:43: note: each undeclared identifier is reported only once for each function it appears in