1 files changed, 165 insertions, 0 deletions
diff --git a/src/x509_obj.cpp b/src/x509_obj.cpp
new file mode 100644
index 000000000..ae545c134
--- /dev/null
+++ b/src/x509_obj.cpp
@@ -0,0 +1,165 @@
+/*************************************************
+* X.509 SIGNED Object Source File                *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#include <botan/x509_obj.h>
+#include <botan/parsing.h>
+#include <botan/pem.h>
+#include <algorithm>
+
+namespace Botan {
+
+/*************************************************
+* Create a generic X.509 object                  *
+*************************************************/
+X509_Object::X509_Object(DataSource& stream, const std::string& labels)
+   {
+   init(stream, labels);
+   }
+
+/*************************************************
+* Createa a generic X.509 object                 *
+*************************************************/
+X509_Object::X509_Object(const std::string& file, const std::string& labels)
+   {
+   DataSource_Stream stream(file, true);
+   init(stream, labels);
+   }
+
+/*************************************************
+* Read a PEM or BER X.509 object                 *
+*************************************************/
+void X509_Object::init(DataSource& in, const std::string& labels)
+   {
+   PEM_labels_allowed = split_on(labels, '/');
+   if(PEM_labels_allowed.size() < 1)
+      throw Invalid_Argument("Bad labels argument to X509_Object");
+
+   PEM_label_pref = PEM_labels_allowed[0];
+   std::sort(PEM_labels_allowed.begin(), PEM_labels_allowed.end());
+
+   try {
+      if(ASN1::maybe_BER(in) && !PEM_Code::matches(in))
+         decode_info(in);
+      else
+         {
+         std::string got_label;
+         DataSource_Memory ber(PEM_Code::decode(in, got_label));
+
+         if(!std::binary_search(PEM_labels_allowed.begin(),
+                                PEM_labels_allowed.end(), got_label))
+            throw Decoding_Error("Invalid PEM label: " + got_label);
+         decode_info(ber);
+         }
+      }
+   catch(Decoding_Error)
+      {
+      throw Decoding_Error(PEM_label_pref + " decoding failed");
+      }
+   }
+
+/*************************************************
+* Read a BER encoded X.509 object                *
+*************************************************/
+void X509_Object::decode_info(DataSource& source)
+   {
+   BER_Decoder ber(source);
+   BER_Decoder sequence = BER::get_subsequence(ber);
+   tbs_bits = BER::get_subsequence(sequence).get_remaining();
+
+   BER::decode(sequence, sig_algo);
+   sequence.decode(sig, BIT_STRING);
+   sequence.verify_end();
+   }
+
+/*************************************************
+* Return a BER or PEM encoded X.509 object       *
+*************************************************/
+void X509_Object::encode(Pipe& out, X509_Encoding encoding) const
+   {
+   SecureVector<byte> der = 
+      DER_Encoder().start_sequence()
+         .add_raw_octets(tbs_data())
+         .encode(sig_algo)
+         .encode(sig, BIT_STRING)
+      .end_sequence()
+   .get_contents();
+
+   if(encoding == PEM)
+      out.write(PEM_Code::encode(der, PEM_label_pref));
+   else
+      out.write(der);
+   }
+
+/*************************************************
+* Return a BER encoded X.509 object              *
+*************************************************/
+SecureVector<byte> X509_Object::BER_encode() const
+   {
+   Pipe ber;
+   ber.start_msg();
+   encode(ber, RAW_BER);
+   ber.end_msg();
+   return ber.read_all();
+   }
+
+/*************************************************
+* Return a PEM encoded X.509 object              *
+*************************************************/
+std::string X509_Object::PEM_encode() const
+   {
+   Pipe pem;
+   pem.start_msg();
+   encode(pem, PEM);
+   pem.end_msg();
+   return pem.read_all_as_string();
+   }
+
+/*************************************************
+* Return the TBS data                            *
+*************************************************/
+SecureVector<byte> X509_Object::tbs_data() const
+   {
+   return ASN1::put_in_sequence(tbs_bits);
+   }
+
+/*************************************************
+* Return the signature of this object            *
+*************************************************/
+SecureVector<byte> X509_Object::signature() const
+   {
+   return sig;
+   }
+
+/*************************************************
+* Return the algorithm used to sign this object  *
+*************************************************/
+AlgorithmIdentifier X509_Object::signature_algorithm() const
+   {
+   return sig_algo;
+   }
+
+/*************************************************
+* Try to decode the actual information           *
+*************************************************/
+void X509_Object::do_decode()
+   {
+   try {
+      force_decode();
+      }
+   catch(Decoding_Error& e)
+      {
+      const std::string what = e.what();
+      throw Decoding_Error(PEM_label_pref + " decoding failed (" +
+                           what.substr(23, std::string::npos) + ")");
+      }
+   catch(Invalid_Argument& e)
+      {
+      const std::string what = e.what();
+      throw Decoding_Error(PEM_label_pref + " decoding failed (" +
+                           what.substr(7, std::string::npos) + ")");
+      }
+   }
+
+}