xmltooling/security/impl/FilesystemCredentialResolver.cpp

   1 /*
   2  *  Copyright 2001-2007 Internet2
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 /**
  18  * FilesystemCredentialResolver.cpp
  19  *
  20  * Supplies credentials from local files
  21  */
  22
  23 #include "internal.h"
  24 #include "logging.h"
  25 #include "security/BasicX509Credential.h"
  26 #include "security/CredentialCriteria.h"
  27 #include "security/CredentialResolver.h"
  28 #include "security/KeyInfoResolver.h"
  29 #include "security/OpenSSLCredential.h"
  30 #include "security/OpenSSLCryptoX509CRL.h"
  31 #include "util/NDC.h"
  32 #include "util/PathResolver.h"
  33 #include "util/XMLHelper.h"
  34
  35 #include <sys/types.h>
  36 #include <sys/stat.h>
  37 #include <openssl/pkcs12.h>
  38 #include <xercesc/util/XMLUniDefs.hpp>
  39 #include <xsec/enc/OpenSSL/OpenSSLCryptoX509.hpp>
  40 #include <xsec/enc/OpenSSL/OpenSSLCryptoKeyRSA.hpp>
  41 #include <xsec/enc/OpenSSL/OpenSSLCryptoKeyDSA.hpp>
  42
  43 using namespace xmlsignature;
  44 using namespace xmltooling::logging;
  45 using namespace xmltooling;
  46 using namespace std;
  47
  48 // OpenSSL password callback...
  49 static int passwd_callback(char* buf, int len, int verify, void* passwd)
  50 {
  51     if(!verify)
  52     {
  53         if(passwd && len > strlen(reinterpret_cast<char*>(passwd)))
  54         {
  55             strcpy(buf,reinterpret_cast<char*>(passwd));
  56             return strlen(buf);
  57         }
  58     }
  59     return 0;
  60 }
  61
  62 namespace xmltooling {
  63
  64 #if defined (_MSC_VER)
  65     #pragma warning( push )
  66     #pragma warning( disable : 4250 )
  67 #endif
  68
  69     class XMLTOOL_DLLLOCAL FilesystemCredentialResolver;
  70     class XMLTOOL_DLLLOCAL FilesystemCredential : public OpenSSLCredential, public BasicX509Credential
  71     {
  72     public:
  73         FilesystemCredential(
  74             FilesystemCredentialResolver* resolver, XSECCryptoKey* key, const std::vector<XSECCryptoX509*>& xseccerts, XSECCryptoX509CRL* crl=NULL
  75             ) : BasicX509Credential(key, xseccerts, crl), m_resolver(resolver), m_usage(UNSPECIFIED_CREDENTIAL) {
  76             extract();
  77             initKeyInfo();
  78         }
  79         virtual ~FilesystemCredential() {
  80         }
  81
  82         unsigned int getUsage() const {
  83             return m_usage;
  84         }
  85
  86         void setUsage(const XMLCh* usage) {
  87             if (usage && *usage) {
  88                 auto_ptr_char u(usage);
  89                 if (!strcmp(u.get(), "signing"))
  90                     m_usage = SIGNING_CREDENTIAL | TLS_CREDENTIAL;
  91                 else if (!strcmp(u.get(), "TLS"))
  92                     m_usage = TLS_CREDENTIAL;
  93                 else if (!strcmp(u.get(), "encryption"))
  94                     m_usage = ENCRYPTION_CREDENTIAL;
  95             }
  96         }
  97
  98         void addKeyNames(const DOMElement* e);
  99
 100         void attach(SSL_CTX* ctx) const;
 101
 102     private:
 103         FilesystemCredentialResolver* m_resolver;
 104         unsigned int m_usage;
 105     };
 106
 107 #if defined (_MSC_VER)
 108     #pragma warning( pop )
 109 #endif
 110
 111     class XMLTOOL_DLLLOCAL FilesystemCredentialResolver : public CredentialResolver
 112     {
 113     public:
 114         FilesystemCredentialResolver(const DOMElement* e);
 115         virtual ~FilesystemCredentialResolver() {
 116             delete m_credential;
 117             for_each(m_certs.begin(),m_certs.end(),X509_free);
 118         }
 119
 120         Lockable* lock() { return this; }
 121         void unlock() {}
 122
 123         const Credential* resolve(const CredentialCriteria* criteria=NULL) const {
 124             return (criteria ? (criteria->matches(*m_credential) ? m_credential : NULL) : m_credential);
 125         }
 126
 127         virtual vector<const Credential*>::size_type resolve(
 128             vector<const Credential*>& results, const CredentialCriteria* criteria=NULL
 129             ) const {
 130             if (!criteria || criteria->matches(*m_credential)) {
 131                 results.push_back(m_credential);
 132                 return 1;
 133             }
 134             return 0;
 135         }
 136
 137         void attach(SSL_CTX* ctx) const;
 138
 139     private:
 140         XSECCryptoKey* loadKey();
 141         XSECCryptoX509CRL* loadCRL();
 142
 143         enum format_t { PEM=SSL_FILETYPE_PEM, DER=SSL_FILETYPE_ASN1, _PKCS12, UNKNOWN };
 144
 145         format_t getEncodingFormat(BIO* in) const;
 146         string formatToString(format_t format) const;
 147         format_t xmlFormatToFormat(const XMLCh* format_xml) const;
 148
 149         format_t m_keyformat,m_crlformat;
 150         string m_keypath,m_keypass,m_crlpath;
 151         vector<X509*> m_certs;
 152         FilesystemCredential* m_credential;
 153     };
 154
 155     CredentialResolver* XMLTOOL_DLLLOCAL FilesystemCredentialResolverFactory(const DOMElement* const & e)
 156     {
 157         return new FilesystemCredentialResolver(e);
 158     }
 159
 160     static const XMLCh _CredentialResolver[] =  UNICODE_LITERAL_18(C,r,e,d,e,n,t,i,a,l,R,e,s,o,l,v,e,r);
 161     static const XMLCh CAPath[] =           UNICODE_LITERAL_6(C,A,P,a,t,h);
 162     static const XMLCh Certificate[] =      UNICODE_LITERAL_11(C,e,r,t,i,f,i,c,a,t,e);
 163     static const XMLCh _certificate[] =     UNICODE_LITERAL_11(c,e,r,t,i,f,i,c,a,t,e);
 164     static const XMLCh CRL[] =              UNICODE_LITERAL_3(C,R,L);
 165     static const XMLCh format[] =           UNICODE_LITERAL_6(f,o,r,m,a,t);
 166     static const XMLCh Key[] =              UNICODE_LITERAL_3(K,e,y);
 167     static const XMLCh _key[] =             UNICODE_LITERAL_3(k,e,y);
 168     static const XMLCh keyName[] =          UNICODE_LITERAL_7(k,e,y,N,a,m,e);
 169     static const XMLCh Name[] =             UNICODE_LITERAL_4(N,a,m,e);
 170     static const XMLCh password[] =         UNICODE_LITERAL_8(p,a,s,s,w,o,r,d);
 171     static const XMLCh Path[] =             UNICODE_LITERAL_4(P,a,t,h);
 172     static const XMLCh _use[] =             UNICODE_LITERAL_3(u,s,e);
 173 };
 174
 175 FilesystemCredentialResolver::FilesystemCredentialResolver(const DOMElement* e) : m_credential(NULL)
 176 {
 177 #ifdef _DEBUG
 178     NDC ndc("FilesystemCredentialResolver");
 179 #endif
 180     Category& log=Category::getInstance(XMLTOOLING_LOGCAT".CredentialResolver."FILESYSTEM_CREDENTIAL_RESOLVER);
 181
 182     if (e && (e->hasAttributeNS(NULL,_certificate) || e->hasAttributeNS(NULL,_key))) {
 183         // Dummy up a simple file resolver config using these attributes.
 184         DOMElement* dummy = e->getOwnerDocument()->createElementNS(NULL,_CredentialResolver);
 185         DOMElement* child;
 186         DOMElement* path;
 187         if (e->hasAttributeNS(NULL,_key)) {
 188             child = e->getOwnerDocument()->createElementNS(NULL,Key);
 189             dummy->appendChild(child);
 190             path = e->getOwnerDocument()->createElementNS(NULL,Path);
 191             child->appendChild(path);
 192             path->appendChild(e->getOwnerDocument()->createTextNode(e->getAttributeNS(NULL,_key)));
 193             if (e->hasAttributeNS(NULL,password))
 194                 child->setAttributeNS(NULL,password,e->getAttributeNS(NULL,password));
 195             if (e->hasAttributeNS(NULL,keyName)) {
 196                 path = e->getOwnerDocument()->createElementNS(NULL,Name);
 197                 child->appendChild(path);
 198                 path->appendChild(e->getOwnerDocument()->createTextNode(e->getAttributeNS(NULL,keyName)));
 199             }
 200         }
 201         if (e->hasAttributeNS(NULL,_certificate)) {
 202             child = e->getOwnerDocument()->createElementNS(NULL,Certificate);
 203             dummy->appendChild(child);
 204             path = e->getOwnerDocument()->createElementNS(NULL,Path);
 205             child->appendChild(path);
 206             path->appendChild(e->getOwnerDocument()->createTextNode(e->getAttributeNS(NULL,_certificate)));
 207         }
 208         e = dummy;  // reset "root" to the dummy config element
 209     }
 210
 211     const DOMElement* root=e;
 212     const XMLCh* usage = root->getAttributeNS(NULL,_use);
 213
 214     XSECCryptoKey* key=NULL;
 215     vector<XSECCryptoX509*> xseccerts;
 216     XSECCryptoX509CRL* crl=NULL;
 217
 218     format_t fformat;
 219     const XMLCh* format_xml=NULL;
 220     BIO* in = NULL;
 221
 222     // Move to Key
 223     const DOMElement* keynode=XMLHelper::getFirstChildElement(root,Key);
 224     if (keynode) {
 225         // Get raw format attrib value, but defer processing til later since may need to
 226         // determine format dynamically, and we need the Path for that.
 227         format_xml=keynode->getAttributeNS(NULL,format);
 228
 229         const XMLCh* password_xml=keynode->getAttributeNS(NULL,password);
 230         if (password_xml) {
 231             auto_ptr_char kp(password_xml);
 232             m_keypass=kp.get();
 233         }
 234
 235         e=XMLHelper::getFirstChildElement(keynode,Path);
 236         if (e && e->hasChildNodes()) {
 237             const XMLCh* s=e->getFirstChild()->getNodeValue();
 238             auto_ptr_char kpath(s);
 239             m_keypath = kpath.get();
 240             XMLToolingConfig::getConfig().getPathResolver()->resolve(m_keypath, PathResolver::XMLTOOLING_CFG_FILE);
 241 #ifdef WIN32
 242             struct _stat stat_buf;
 243             if (_stat(m_keypath.c_str(), &stat_buf) != 0)
 244 #else
 245             struct stat stat_buf;
 246             if (stat(m_keypath.c_str(), &stat_buf) != 0)
 247 #endif
 248             {
 249                 log.error("key file (%s) can't be opened", m_keypath.c_str());
 250                 throw XMLSecurityException("FilesystemCredentialResolver can't access key file ($1)",params(1,m_keypath.c_str()));
 251             }
 252         }
 253         else {
 254             log.error("Path element missing inside Key element");
 255             throw XMLSecurityException("FilesystemCredentialResolver can't access key file, no Path element specified.");
 256         }
 257
 258         // Determine the key encoding format dynamically, if not explicitly specified
 259         if (format_xml && *format_xml) {
 260             fformat = xmlFormatToFormat(format_xml);
 261             if (fformat != UNKNOWN) {
 262                 m_keyformat = fformat;
 263             }
 264             else {
 265                 auto_ptr_char unknown(format_xml);
 266                 log.error("configuration specifies unknown key encoding format (%s)", unknown.get());
 267                 throw XMLSecurityException("FilesystemCredentialResolver configuration contains unknown key encoding format ($1)",params(1,unknown.get()));
 268             }
 269         }
 270         else {
 271             in=BIO_new(BIO_s_file_internal());
 272             if (in && BIO_read_filename(in,m_keypath.c_str())>0) {
 273                 m_keyformat = getEncodingFormat(in);
 274                 log.debug("key encoding format for (%s) dynamically resolved as (%s)", m_keypath.c_str(), formatToString(m_keyformat).c_str());
 275             }
 276             else {
 277                 log.error("key file (%s) can't be read to determine encoding format", m_keypath.c_str());
 278                 throw XMLSecurityException("FilesystemCredentialResolver can't read key file ($1) to determine encoding format",params(1,m_keypath.c_str()));
 279             }
 280             if (in)
 281                 BIO_free(in);
 282             in = NULL;
 283         }
 284
 285         // Load the key.
 286         key = loadKey();
 287     }
 288
 289     // Check for CRL.
 290     const DOMElement* crlnode=XMLHelper::getFirstChildElement(root,CRL);
 291     if (crlnode) {
 292         // Get raw format attrib value, but defer processing til later since may need to
 293         // determine format dynamically, and we need the Path for that.
 294         format_xml=crlnode->getAttributeNS(NULL,format);
 295
 296         e=XMLHelper::getFirstChildElement(crlnode,Path);
 297         if (e && e->hasChildNodes()) {
 298             const XMLCh* s=e->getFirstChild()->getNodeValue();
 299             auto_ptr_char kpath(s);
 300             m_crlpath=kpath.get();
 301             XMLToolingConfig::getConfig().getPathResolver()->resolve(m_crlpath, PathResolver::XMLTOOLING_CFG_FILE);
 302 #ifdef WIN32
 303             struct _stat stat_buf;
 304             if (_stat(m_crlpath.c_str(), &stat_buf) != 0)
 305 #else
 306             struct stat stat_buf;
 307             if (stat(m_crlpath.c_str(), &stat_buf) != 0)
 308 #endif
 309             {
 310                 log.error("CRL file (%s) can't be opened", m_crlpath.c_str());
 311                 throw XMLSecurityException("FilesystemCredentialResolver can't access CRL file ($1)",params(1,m_crlpath.c_str()));
 312             }
 313         }
 314         else {
 315             log.error("Path element missing inside CRL element");
 316             throw XMLSecurityException("FilesystemCredentialResolver can't access CRL file, no Path element specified.");
 317         }
 318
 319         // Determine the CRL encoding format dynamically, if not explicitly specified
 320         if (format_xml && *format_xml) {
 321             fformat = xmlFormatToFormat(format_xml);
 322             if (fformat != UNKNOWN) {
 323                 m_crlformat = fformat;
 324             }
 325             else {
 326                 auto_ptr_char unknown(format_xml);
 327                 log.error("configuration specifies unknown CRL encoding format (%s)", unknown.get());
 328                 throw XMLSecurityException("FilesystemCredentialResolver configuration contains unknown CRL encoding format ($1)",params(1,unknown.get()));
 329             }
 330         }
 331         else {
 332             in=BIO_new(BIO_s_file_internal());
 333             if (in && BIO_read_filename(in,m_crlpath.c_str())>0) {
 334                 m_crlformat = getEncodingFormat(in);
 335                 log.debug("CRL encoding format for (%s) dynamically resolved as (%s)", m_crlpath.c_str(), formatToString(m_crlformat).c_str());
 336             }
 337             else {
 338                 log.error("CRL file (%s) can't be read to determine encoding format", m_crlpath.c_str());
 339                 throw XMLSecurityException("FilesystemCredentialResolver can't read CRL file ($1) to determine encoding format",params(1,m_crlpath.c_str()));
 340             }
 341             if (in)
 342                 BIO_free(in);
 343             in = NULL;
 344         }
 345
 346         // Load the key.
 347         crl = loadCRL();
 348     }
 349
 350     // Check for Certificate
 351     e=XMLHelper::getFirstChildElement(root,Certificate);
 352     if (!e) {
 353         m_credential = new FilesystemCredential(this,key,xseccerts,crl);
 354         m_credential->addKeyNames(keynode);
 355         m_credential->setUsage(usage);
 356         return;
 357     }
 358     auto_ptr_char certpass(e->getAttributeNS(NULL,password));
 359
 360     const DOMElement* ep=XMLHelper::getFirstChildElement(e,Path);
 361     if (!ep || !ep->hasChildNodes()) {
 362         log.error("Path element missing inside Certificate element or is empty");
 363         delete key;
 364         delete crl;
 365         throw XMLSecurityException("FilesystemCredentialResolver can't access certificate file, missing or empty Path element.");
 366     }
 367
 368     auto_ptr_char certpath2(ep->getFirstChild()->getNodeValue());
 369     string certpath(certpath2.get());
 370     XMLToolingConfig::getConfig().getPathResolver()->resolve(certpath, PathResolver::XMLTOOLING_CFG_FILE);
 371
 372     format_xml=e->getAttributeNS(NULL,format);
 373     if (format_xml && *format_xml) {
 374         fformat = xmlFormatToFormat(format_xml);
 375         if (fformat == UNKNOWN) {
 376             auto_ptr_char unknown(format_xml);
 377             log.error("configuration specifies unknown certificate encoding format (%s)", unknown.get());
 378             delete key;
 379             delete crl;
 380             throw XMLSecurityException("FilesystemCredentialResolver configuration contains unknown certificate encoding format ($1)",params(1,unknown.get()));
 381         }
 382     }
 383
 384     try {
 385         X509* x=NULL;
 386         PKCS12* p12=NULL;
 387         in=BIO_new(BIO_s_file_internal());
 388         if (in && BIO_read_filename(in,certpath.c_str())>0) {
 389             if (!format_xml || !*format_xml) {
 390                 // Determine the cert encoding format dynamically, if not explicitly specified
 391                 fformat = getEncodingFormat(in);
 392                 log.debug("certificate encoding format for (%s) dynamically resolved as (%s)", certpath.c_str(), formatToString(fformat).c_str());
 393             }
 394
 395             switch(fformat) {
 396                 case PEM:
 397                     while (x=PEM_read_bio_X509(in,NULL,passwd_callback,const_cast<char*>(certpass.get())))
 398                         m_certs.push_back(x);
 399                     break;
 400
 401                 case DER:
 402                     x=d2i_X509_bio(in,NULL);
 403                     if (x)
 404                         m_certs.push_back(x);
 405                     else {
 406                         log_openssl();
 407                         BIO_free(in);
 408                         throw XMLSecurityException("FilesystemCredentialResolver unable to load DER certificate from file ($1)",params(1,certpath.c_str()));
 409                     }
 410                     break;
 411
 412                 case _PKCS12:
 413                     p12=d2i_PKCS12_bio(in,NULL);
 414                     if (p12) {
 415                         PKCS12_parse(p12, certpass.get(), NULL, &x, NULL);
 416                         PKCS12_free(p12);
 417                     }
 418                     if (x) {
 419                         m_certs.push_back(x);
 420                         x=NULL;
 421                     } else {
 422                         log_openssl();
 423                         BIO_free(in);
 424                         throw XMLSecurityException("FilesystemCredentialResolver unable to load PKCS12 certificate from file ($1)",params(1,certpath.c_str()));
 425                     }
 426                     break;
 427             } // end switch
 428
 429         } else {
 430             log_openssl();
 431             if (in) {
 432                 BIO_free(in);
 433                 in=NULL;
 434             }
 435             throw XMLSecurityException("FilesystemCredentialResolver unable to load certificate(s) from file ($1)",params(1,certpath.c_str()));
 436         }
 437         if (in) {
 438             BIO_free(in);
 439             in=NULL;
 440         }
 441
 442         if (m_certs.empty())
 443             throw XMLSecurityException("FilesystemCredentialResolver unable to load any certificate(s)");
 444
 445         // Load any extra CA files.
 446         const DOMElement* extra=XMLHelper::getFirstChildElement(e,CAPath);
 447         while (extra) {
 448             if (!extra->hasChildNodes()) {
 449                 log.warn("skipping empty CAPath element");
 450                 extra = XMLHelper::getNextSiblingElement(extra,CAPath);
 451                 continue;
 452             }
 453             auto_ptr_char capath2(extra->getFirstChild()->getNodeValue());
 454             string capath(capath2.get());
 455             XMLToolingConfig::getConfig().getPathResolver()->resolve(capath, PathResolver::XMLTOOLING_CFG_FILE);
 456             x=NULL;
 457             p12=NULL;
 458             in=BIO_new(BIO_s_file_internal());
 459             if (in && BIO_read_filename(in,capath.c_str())>0) {
 460                 if (!format_xml || !*format_xml) {
 461                     // Determine the cert encoding format dynamically, if not explicitly specified
 462                     fformat = getEncodingFormat(in);
 463                     log.debug("CA certificate encoding format for (%s) dynamically resolved as (%s)", capath.c_str(), formatToString(fformat).c_str());
 464                 }
 465
 466                 switch (fformat) {
 467                     case PEM:
 468                         while (x=PEM_read_bio_X509(in,NULL,NULL,NULL))
 469                             m_certs.push_back(x);
 470                         break;
 471
 472                     case DER:
 473                         x=d2i_X509_bio(in,NULL);
 474                         if (x)
 475                             m_certs.push_back(x);
 476                         else {
 477                             log_openssl();
 478                             BIO_free(in);
 479                             throw XMLSecurityException("FilesystemCredentialResolver unable to load DER CA certificate from file ($1)",params(1,capath.c_str()));
 480                         }
 481                         break;
 482
 483                     case _PKCS12:
 484                         p12 = d2i_PKCS12_bio(in, NULL);
 485                         if (p12) {
 486                             PKCS12_parse(p12, NULL, NULL, &x, NULL);
 487                             PKCS12_free(p12);
 488                         }
 489                         if (x) {
 490                             m_certs.push_back(x);
 491                             x=NULL;
 492                         }
 493                         else {
 494                             log_openssl();
 495                             BIO_free(in);
 496                             throw XMLSecurityException("FilesystemCredentialResolver unable to load PKCS12 CA certificate from file ($1)",params(1,capath.c_str()));
 497                         }
 498                         break;
 499                 } //end switch
 500
 501                 BIO_free(in);
 502             }
 503             else {
 504                 if (in)
 505                     BIO_free(in);
 506                 log_openssl();
 507                 log.error("CA file (%s) can't be opened", capath.c_str());
 508                 throw XMLSecurityException("FilesystemCredentialResolver can't open CA file ($1)",params(1,capath.c_str()));
 509             }
 510
 511             extra = XMLHelper::getNextSiblingElement(extra,CAPath);
 512         }
 513     }
 514     catch (XMLToolingException&) {
 515         delete key;
 516         delete crl;
 517         for_each(m_certs.begin(), m_certs.end(), X509_free);
 518         throw;
 519     }
 520
 521     // Reflect certs over to XSEC form and wrap with credential object.
 522     for (vector<X509*>::iterator j=m_certs.begin(); j!=m_certs.end(); j++)
 523         xseccerts.push_back(new OpenSSLCryptoX509(*j));
 524     if (!key && !xseccerts.empty())
 525         key = xseccerts.front()->clonePublicKey();
 526     m_credential = new FilesystemCredential(this, key, xseccerts, crl);
 527     m_credential->addKeyNames(keynode);
 528     m_credential->setUsage(usage);
 529 }
 530
 531 XSECCryptoKey* FilesystemCredentialResolver::loadKey()
 532 {
 533 #ifdef _DEBUG
 534     NDC ndc("loadKey");
 535 #endif
 536
 537     // Get a EVP_PKEY.
 538     EVP_PKEY* pkey=NULL;
 539     BIO* in=BIO_new(BIO_s_file_internal());
 540     if (in && BIO_read_filename(in,m_keypath.c_str())>0) {
 541         switch (m_keyformat) {
 542             case PEM:
 543                 pkey=PEM_read_bio_PrivateKey(in, NULL, passwd_callback, const_cast<char*>(m_keypass.c_str()));
 544                 break;
 545
 546             case DER:
 547                 pkey=d2i_PrivateKey_bio(in, NULL);
 548                 break;
 549
 550             default: {
 551                 PKCS12* p12 = d2i_PKCS12_bio(in, NULL);
 552                 if (p12) {
 553                     PKCS12_parse(p12, const_cast<char*>(m_keypass.c_str()), &pkey, NULL, NULL);
 554                     PKCS12_free(p12);
 555                 }
 556             }
 557         }
 558     }
 559     if (in)
 560         BIO_free(in);
 561
 562     // Now map it to an XSEC wrapper.
 563     if (pkey) {
 564         XSECCryptoKey* ret=NULL;
 565         switch (pkey->type) {
 566             case EVP_PKEY_RSA:
 567                 ret=new OpenSSLCryptoKeyRSA(pkey);
 568                 break;
 569
 570             case EVP_PKEY_DSA:
 571                 ret=new OpenSSLCryptoKeyDSA(pkey);
 572                 break;
 573
 574             default:
 575                 Category::getInstance(XMLTOOLING_LOGCAT".CredentialResolver."FILESYSTEM_CREDENTIAL_RESOLVER).error("unsupported private key type");
 576         }
 577         EVP_PKEY_free(pkey);
 578         if (ret)
 579             return ret;
 580     }
 581
 582     log_openssl();
 583     throw XMLSecurityException("FilesystemCredentialResolver unable to load private key from file.");
 584 }
 585
 586 XSECCryptoX509CRL* FilesystemCredentialResolver::loadCRL()
 587 {
 588 #ifdef _DEBUG
 589     NDC ndc("loadCRL");
 590 #endif
 591
 592     X509_CRL* crl=NULL;
 593     BIO* in=BIO_new(BIO_s_file_internal());
 594     if (in && BIO_read_filename(in,m_crlpath.c_str())>0) {
 595         switch (m_crlformat) {
 596             case PEM:
 597                 crl=PEM_read_bio_X509_CRL(in, NULL, NULL, NULL);
 598                 break;
 599
 600             case DER:
 601                 crl=d2i_X509_CRL_bio(in, NULL);
 602                 break;
 603         }
 604     }
 605     if (in)
 606         BIO_free(in);
 607
 608     // Now map it to an XSEC wrapper.
 609     if (crl) {
 610         XSECCryptoX509CRL* ret=new OpenSSLCryptoX509CRL(crl);
 611         X509_CRL_free(crl);
 612         return ret;
 613     }
 614
 615     log_openssl();
 616     throw XMLSecurityException("FilesystemCredentialResolver unable to load CRL from file.");
 617 }
 618
 619 // Used to determine the encoding format of credentials files
 620 // dynamically. Supports: PEM, DER, PKCS12.
 621 FilesystemCredentialResolver::format_t FilesystemCredentialResolver::getEncodingFormat(BIO* in) const
 622 {
 623     PKCS12* p12 = NULL;
 624     format_t format;
 625
 626     const int READSIZE = 1;
 627     char buf[READSIZE];
 628     char b1;
 629     int mark;
 630
 631     try {
 632         if ( (mark = BIO_tell(in)) < 0 )
 633             throw XMLSecurityException("getEncodingFormat: BIO_tell() can't get the file position");
 634         if ( BIO_read(in, buf, READSIZE) <= 0 )
 635             throw XMLSecurityException("getEncodingFormat: BIO_read() can't read from the stream");
 636         if ( BIO_seek(in, mark) < 0 )
 637             throw XMLSecurityException("getEncodingFormat: BIO_seek() can't reset the file position");
 638     }
 639     catch (...) {
 640         log_openssl();
 641         throw;
 642     }
 643
 644     b1 = buf[0];
 645
 646     // This is a slight variation of the Java code by Chad La Joie.
 647     //
 648     // Check the first byte of the file.  If it's some kind of
 649     // DER-encoded structure (including PKCS12), it will begin with ASCII 048.
 650     // Otherwise, assume it's PEM.
 651     if (b1 !=  48) {
 652         format = PEM;
 653     } else {
 654         // Here we know it's DER-encoded, now try to parse it as a PKCS12
 655         // ASN.1 structure.  If it fails, must be another kind of DER-encoded
 656         // key/cert structure.  A little inefficient...but it works.
 657         if ( (p12=d2i_PKCS12_bio(in,NULL)) == NULL ) {
 658             format = DER;
 659         } else {
 660             format = _PKCS12;
 661         }
 662         if (p12)
 663             PKCS12_free(p12);
 664         if ( BIO_seek(in, mark) < 0 ) {
 665             log_openssl();
 666             throw XMLSecurityException("getEncodingFormat: BIO_seek() can't reset the file position");
 667         }
 668     }
 669
 670     return format;
 671 }
 672
 673 // Convert key/cert format_t types to a human-meaningful string for debug output
 674 string FilesystemCredentialResolver::formatToString(format_t format) const
 675 {
 676     switch(format) {
 677         case PEM:
 678             return "PEM";
 679         case DER:
 680             return "DER";
 681         case _PKCS12:
 682             return "PKCS12";
 683         default:
 684             return "UNKNOWN";
 685     }
 686 }
 687
 688 // Convert key/cert raw XML format attribute (XMLCh[]) to format_t type
 689 FilesystemCredentialResolver::format_t FilesystemCredentialResolver::xmlFormatToFormat(const XMLCh* format_xml) const
 690 {
 691     static const XMLCh cPEM[] = UNICODE_LITERAL_3(P,E,M);
 692     static const XMLCh cDER[] = UNICODE_LITERAL_3(D,E,R);
 693     static const XMLCh cPKCS12[] = { chLatin_P, chLatin_K, chLatin_C, chLatin_S, chDigit_1, chDigit_2, chNull };
 694     format_t format;
 695
 696     if (!XMLString::compareString(format_xml,cPEM))
 697         format=PEM;
 698     else if (!XMLString::compareString(format_xml,cDER))
 699         format=DER;
 700     else if (!XMLString::compareString(format_xml,cPKCS12))
 701         format=_PKCS12;
 702     else
 703         format=UNKNOWN;
 704
 705     return format;
 706 }
 707
 708 void FilesystemCredentialResolver::attach(SSL_CTX* ctx) const
 709 {
 710 #ifdef _DEBUG
 711     NDC ndc("attach");
 712 #endif
 713
 714     if (m_keypath.empty())
 715         throw XMLSecurityException("No key available, unable to attach private key to SSL context.");
 716
 717     // Attach key.
 718     SSL_CTX_set_default_passwd_cb(ctx, passwd_callback);
 719     SSL_CTX_set_default_passwd_cb_userdata(ctx, const_cast<char*>(m_keypass.c_str()));
 720
 721     int ret=0;
 722     switch (m_keyformat) {
 723         case PEM:
 724             ret=SSL_CTX_use_PrivateKey_file(ctx, m_keypath.c_str(), m_keyformat);
 725             break;
 726
 727         case DER:
 728             ret=SSL_CTX_use_RSAPrivateKey_file(ctx, m_keypath.c_str(), m_keyformat);
 729             break;
 730
 731         default: {
 732             BIO* in=BIO_new(BIO_s_file_internal());
 733             if (in && BIO_read_filename(in,m_keypath.c_str())>0) {
 734                 EVP_PKEY* pkey=NULL;
 735                 PKCS12* p12 = d2i_PKCS12_bio(in, NULL);
 736                 if (p12) {
 737                     PKCS12_parse(p12, const_cast<char*>(m_keypass.c_str()), &pkey, NULL, NULL);
 738                     PKCS12_free(p12);
 739                     if (pkey) {
 740                         ret=SSL_CTX_use_PrivateKey(ctx, pkey);
 741                         EVP_PKEY_free(pkey);
 742                     }
 743                 }
 744             }
 745             if (in)
 746                 BIO_free(in);
 747         }
 748     }
 749
 750     if (ret!=1) {
 751         log_openssl();
 752         throw XMLSecurityException("Unable to attach private key to SSL context.");
 753     }
 754
 755     // Attach certs.
 756     for (vector<X509*>::const_iterator i=m_certs.begin(); i!=m_certs.end(); i++) {
 757         if (i==m_certs.begin()) {
 758             if (SSL_CTX_use_certificate(ctx, *i) != 1) {
 759                 log_openssl();
 760                 throw XMLSecurityException("Unable to attach client certificate to SSL context.");
 761             }
 762         }
 763         else {
 764             // When we add certs, they don't get ref counted, so we need to duplicate them.
 765             X509* dup = X509_dup(*i);
 766             if (SSL_CTX_add_extra_chain_cert(ctx, dup) != 1) {
 767                 X509_free(dup);
 768                 log_openssl();
 769                 throw XMLSecurityException("Unable to attach CA certificate to SSL context.");
 770             }
 771         }
 772     }
 773 }
 774
 775 void FilesystemCredential::addKeyNames(const DOMElement* e)
 776 {
 777     e = e ? XMLHelper::getFirstChildElement(e, Name) : NULL;
 778     while (e) {
 779         if (e->hasChildNodes()) {
 780             auto_ptr_char n(e->getFirstChild()->getNodeValue());
 781             if (n.get() && *n.get())
 782                 m_keyNames.insert(n.get());
 783         }
 784         e = XMLHelper::getNextSiblingElement(e, Name);
 785     }
 786 }
 787
 788 void FilesystemCredential::attach(SSL_CTX* ctx) const
 789 {
 790     return m_resolver->attach(ctx);
 791 }