attributes read

doc/examples/cryptoki-demo.cxx

@@ -39,7 +39,8 @@ int main(int argc, char const*const*const argv) try {
                <<"label: \""<<info.label<<'"'<<std::endl
                <<"manufacturerID: \""<<info.manufacturerID<<'"'<<std::endl
                <<"model: \""<<info.model<<'"'<<std::endl
-               <<"serialNumber: \""<<info.serialNumber<<'"'<<std::endl
+               <<"serialNumber: \""<<cryptoki::readable(info.serialNumber)
+               <<'"'<<std::endl
                <<"flags: \""<<info.flags<<'"'<<std::endl
                <<"maxSessionCount: \""<<info.maxSessionCount<<'"'<<std::endl
                <<"sessionCount: \""<<info.sessionCount<<'"'<<std::endl
@@ -56,7 +57,8 @@ int main(int argc, char const*const*const argv) try {
                <<'.'<<(int)info.hardwareVersion.minor<<'"'<<std::endl
                <<"firmwareVersion: \""<<(int)info.firmwareVersion.major
                <<'.'<<(int)info.firmwareVersion.minor<<'"'<<std::endl
-               <<"utcTime: \""<<info.utcTime<<'"'<<std::endl;
+               <<"utcTime: \""<<cryptoki::readable(info.utcTime)
+               <<'"'<<std::endl;
       cryptoki::MechanismList mechs(it->mechanismlist());
       for (cryptoki::MechanismList::iterator it2(mechs.begin());
            it2!=mechs.end(); ++it2) {
@@ -73,15 +75,15 @@ int main(int argc, char const*const*const argv) try {
       std::cout<<"Objects Found: "<<objs.size()<<std::endl;
       for (cryptoki::ObjectList::iterator it(objs.begin());
            it!=objs.end(); ++it) {
-        cryptoki::AttributeMap attrs(it->getattributevalue());
+        std::cout<<"-------------------- Object -----------------"<<std::endl;
+        cryptoki::AttributeMap attrs(it->attributes());
         for (cryptoki::AttributeMap::iterator it(attrs.begin());
              it!=attrs.end(); ++it) {
-          std::cout<<"-------------------- Object -----------------"<<std::endl
+          std::cout<<" - attribute: "<<it->second.name()<<"=\""
-                   <<"id: \""<<it->second.type<<'"'<<std::endl
+                   <<cryptoki::readable(it->second.value)<<'"'<<std::endl;
-                   <<"name: \""<<it->second.name()<<'"'<<std::endl
-                   <<"value: \""<<it->second.value<<'"'<<std::endl;
         }
       }
+      std::cout<<"**** Success"<<std::endl;
     } catch (std::exception& x) {
       std::cerr<<"**** FEHLER in "<<*argv<<": "<<x.what()<<std::endl;
     }

src/cryptoki.hxx

@@ -17,6 +17,8 @@
 // for inline implementations only
 #include <sstream>
 #include <cstdlib> // malloc/free
+#include <cstring> // memset
+#include <iomanip>
 
 #include <iostream> // debug
 
@@ -34,6 +36,31 @@ namespace cryptoki {
     #define UNDEF_CRYPTOKI_FN_LOG
   #endif
   
+  std::string hex(const std::string& data) {
+    std::stringstream res;
+    for (std::string::const_iterator it(data.begin()); it!=data.end(); ++it)
+      res<<std::hex<<std::setfill('0')<<std::setw(2)
+         <<(unsigned int)(unsigned char)*it;
+    return res.str();
+  }
+
+  static const std::string LETTER_CHARS
+      ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
+  static const std::string NUMBER_CHARS
+      ("0123456789");
+  static const std::string GRAFIC_CHARS
+      ("!\"#%&'()*+,-./:;<=>?[\\]^_{|}~");
+  static const std::string BLANK_CHARS
+      (" ");
+  static const std::string VALID_CHARS
+      (LETTER_CHARS+NUMBER_CHARS+GRAFIC_CHARS+BLANK_CHARS);
+
+  std::string readable(const std::string& data) {
+    if (data.find_first_not_of(VALID_CHARS)<data.size())
+      return hex(data);
+    else
+      return data;
+  }
 
   template <int NUM, typename TYPE> std::vector<TYPE> toVector(TYPE in[NUM]) {
     return std::vector<TYPE>(in, in+NUM);
@@ -515,10 +542,29 @@ namespace cryptoki {
       /*! Please notem, that you must not instanciate more than one
           Init per unique function list!
 
-          @param fn function list to be used within this instance
+          @param library name of the shared library that supports pkcs#11
           @param exc wether exceptions should be thrown */
       Init(const std::string& library="onepin-opensc-pkcs11.so", bool exc=true);
 
+      ~Init() {
+        try {
+          //! calls @c C_Finalize
+          return check(_slot._init->_fn->C_Finalize(0),
+                       CRYPTOKI_FN_LOG("C_Finalize"));
+        } catch (...) {
+          if (!std::uncaught_exception()) throw;
+        }
+      }
+      
+      /*! @todo Not implemented:
+          @code
+      bool finalize() {
+        //! calls @c C_Finalize
+        return check(_slot._init->_fn->C_Finalize(CK_VOID_PTR),
+                     CRYPTOKI_FN_LOG("C_Finalize"));
+      }
+
+
       /*! @name                                            C Like Error Handling
 
           You are strongly recommended not to disable exception
@@ -575,7 +621,7 @@ namespace cryptoki {
       bool check(CK_RV result, const std::string& context="") {
         _res = result;
         if (_init->_exc && !*this)
-          if (context.size())
+          if (!context.empty())
             throw access_error(context+": "+error());
           else
             throw access_error(error());
@@ -725,7 +771,7 @@ namespace cryptoki {
       bool check(CK_RV result, const std::string& context="") {
         _res = result;
         if (_slot._init->_exc && !*this)
-          if (context.size())
+          if (!context.empty())
             throw access_error(context+": "+error());
           else
             throw access_error(error());
@@ -951,14 +997,6 @@ namespace cryptoki {
         res.resize(size);
         return res;
       }
-
-      /*! @todo Not implemented:
-          @code
-      bool finalize() {
-        //! calls @c C_Finalize
-        return check(_slot._init->_fn->C_Finalize(CK_VOID_PTR),
-                     CRYPTOKI_FN_LOG("C_Finalize"));
-      }
           @endcode */
 
       /*! @todo Not implemented:
@@ -1188,7 +1226,7 @@ namespace cryptoki {
       bool check(CK_RV result, const std::string& context="") {
         _res = result;
         if (_session->_slot._init->_exc && !*this)
-          if (context.size())
+          if (!context.empty())
             throw access_error(context+": "+error());
           else
             throw access_error(error());
@@ -1331,11 +1369,11 @@ namespace cryptoki {
       }
           @endcode */
 
-      AttributeMap getattributevalue(AttributeTypeList attributes
+      AttributeMap attributes(AttributeTypeList attributes
-                                     =AttributeTypeList()) {
+                              = AttributeTypeList()) {
         AttributeMap res;
          //! Gets all attributes, if @c attributes is empty
-        if (!attributes.size()) {
+        if (attributes.empty()) {
           attributes.push_back(CKA_CLASS);
           attributes.push_back(CKA_TOKEN);
           attributes.push_back(CKA_PRIVATE);
@@ -1404,28 +1442,71 @@ namespace cryptoki {
           attrs = (CK_ATTRIBUTE){*it, 0, 0};
           try {
             //! calls @c C_GetAttributeValue
-            if (check(_session->_slot._init->_fn->C_GetAttributeValue
+            if (_session->_slot._init->_fn->C_GetAttributeValue
-                      (_session->_session, _object, &attrs, 1),
+                (_session->_session, _object, &attrs, 1)
-                      CRYPTOKI_FN_LOG("C_GetAttributeValue"))) {
+                == CKR_ATTRIBUTE_TYPE_INVALID
-              if (attrs.ulValueLen>0) {
+                || _res == CKR_ATTRIBUTE_SENSITIVE) {
+              continue; //! Ignores unsupported Attributes.
+            } else {
+              check(_res, CRYPTOKI_FN_LOG("C_GetAttributeValue"));
+              if ((long)attrs.ulValueLen>0l) {
                 attrs.pValue = malloc(attrs.ulValueLen);
-                if (_session->_slot._init->_fn->C_GetAttributeValue
+                attrs.pValue = memset(attrs.pValue, 0, attrs.ulValueLen);
-                    (_session->_session, _object, &attrs, 1)
+                if (check(_session->_slot._init->_fn->C_GetAttributeValue
-                    == CKR_ATTRIBUTE_TYPE_INVALID)
+                          (_session->_session, _object, &attrs, 1),
-                  std::cerr<<"*** Inv. Attr:"<<Attribute(*it).name()<<std::endl;
+                          CRYPTOKI_FN_LOG("C_GetAttributeValue")))
-                else {
+                  /*! @todo There's no @c CKA_WRAP_TEMPLATE in Open
-                  check(_res, CRYPTOKI_FN_LOG("C_GetAttributeValue"));
+                            Cryptoki. From the Specs: «In the special
+                            case of an attribute whose value is an
+                            array of attributes, for example
+                            CKA_WRAP_TEMPLATE, where it is passed in
+                            with pValue not NULL, then if the pValue
+                            of elements within the array is NULL_PTR
+                            then the ulValueLen of elements within the
+                            array will be set to the required
+                            length. If the pValue of elements within
+                            the array is not NULL_PTR, then the
+                            ulValueLen element of attributes within
+                            the array must reflect the space that the
+                            corresponding pValue points to, and pValue
+                            is filled in if there is sufficient
+                            room. Therefore it is important to
+                            initialize the contents of a buffer before
+                            calling C_GetAttributeValue to get such an
+                            array value. If any ulValueLen within the
+                            array isn't large enough, it will be set
+                            to â<EFBFBD><EFBFBD>1 and the function will return
+                            CKR_BUFFER_TOO_SMALL, as it does if an
+                            attribute in the pTemplate argument has
+                            ulValueLen too small. Note that any
+                            attribute whose value is an array of
+                            attributes is identifiable by virtue of
+                            the attribute type having the
+                            CKF_ARRAY_ATTRIBUTE bit set.» */
                   res.insert(std::make_pair(attrs.type, Attribute(attrs)));
-                }
+                else
-              } else
+                  free(attrs.pValue);
-                std::cerr<<"*** Wrong Attr: "<<Attribute(*it).name()<<std::endl;
+              } else if (*it==CKA_MODULUS && attrs.ulValueLen==0) {
+                /*! @bug This is a bug in onepin-opensc-pkcs11.so: If
+                         @c CKA_MODULUS has a size of 0 bytes, the
+                         following query to @c CKA_MODULUS_BITS ends
+                         in a segmentation fault.
+                    
+                    @note @c CKA_MODULUS @b must immediately be
+                          followed by @c CKA_MODULUS_BITS in the
+                          attribute list, because if the size of @c
+                          CKA_MODULUS is 0 Bytes, the following
+                          attribute query is skipped as a work around
+                          to this bug. */
+                if (++it==attributes.end()) break;
+              }
             }
-            return res;
           } catch (...) {
             free(attrs.pValue);
             throw;
           }
         }
+        return res;
 //         CK_ATTRIBUTE* attrs(new CK_ATTRIBUTE[attributes.size()]);
 //         AttributeTypeList::const_iterator it(attributes.begin());
 //         for (AttributeTypeList::size_type i(0); it!=attributes.end(); ++it, ++i)