auxiliaries are now in cryptaux.hxx; some get methods for openssl::X509

src/cryptaux.hxx

@@ -0,0 +1,64 @@
+/*! @file
+
+    @id $Id$
+*/
+//       1         2         3         4         5         6         7         8
+// 45678901234567890123456789012345678901234567890123456789012345678901234567890
+
+#ifndef __CRYPTAUX_HXX__
+#define __CRYPTAUX_HXX__
+
+#include <string>
+#include <sstream>
+#include <iomanip>
+
+/*! @defgroup gcrypto Auxiliary Crypto-Functions */
+//@{
+
+//! @see gcrypto
+namespace crypto {
+  
+  static const std::string LETTER_CHARS
+      ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
+  static const std::string NUMBER_CHARS
+      ("0123456789");
+  //! Contains @c @ in addition to standard characters.
+  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);
+  
+  inline std::string hex(const std::string& data,
+                         std::string::size_type len=20) {
+    std::stringstream res;
+    std::string::size_type pos(0);
+    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;
+      ++pos;
+      if (pos%len==0 || pos==data.size()) {
+        res<<std::string(2*(len-(pos-1)%len), ' ');
+        for (std::string::size_type i(pos-(pos-1)%len-1); i<pos; ++i)
+          res<<(VALID_CHARS.find(data[i])==std::string::npos?'.':data[i]);
+        if (pos!=data.size()) res<<std::endl;
+      }
+    }
+    return res.str();
+  }
+
+  inline std::string readable(const std::string& data,
+                              std::string::size_type len=20) {
+    if (!data.size())
+      return "<empty>";
+    else if (data.find_first_not_of(VALID_CHARS)<data.size())
+      return hex(data);
+    else
+      return "\""+data+"\"";
+  }
+}
+
+//@}
+
+#endif