1 files changed, 66 insertions, 0 deletions
diff --git a/src/asn1/asn1_int.cpp b/src/asn1/asn1_int.cpp
new file mode 100644
index 000000000..e837dedf0
--- /dev/null
+++ b/src/asn1/asn1_int.cpp
@@ -0,0 +1,66 @@
+/*************************************************
+* ASN.1 Internals Source File                    *
+* (C) 1999-2007 Jack Lloyd                       *
+*************************************************/
+
+#include <botan/asn1_int.h>
+#include <botan/der_enc.h>
+#include <botan/ber_dec.h>
+#include <botan/data_src.h>
+#include <botan/parsing.h>
+
+namespace Botan {
+
+/*************************************************
+* BER Decoding Exceptions                        *
+*************************************************/
+BER_Decoding_Error::BER_Decoding_Error(const std::string& str) :
+   Decoding_Error("BER: " + str) {}
+
+BER_Bad_Tag::BER_Bad_Tag(const std::string& str, ASN1_Tag tag) :
+      BER_Decoding_Error(str + ": " + to_string(tag)) {}
+
+BER_Bad_Tag::BER_Bad_Tag(const std::string& str,
+                         ASN1_Tag tag1, ASN1_Tag tag2) :
+   BER_Decoding_Error(str + ": " + to_string(tag1) + "/" + to_string(tag2)) {}
+
+namespace ASN1 {
+
+/*************************************************
+* Put some arbitrary bytes into a SEQUENCE       *
+*************************************************/
+SecureVector<byte> put_in_sequence(const MemoryRegion<byte>& contents)
+   {
+   return DER_Encoder()
+      .start_cons(SEQUENCE)
+         .raw_bytes(contents)
+      .end_cons()
+   .get_contents();
+   }
+
+/*************************************************
+* Convert a BER object into a string object      *
+*************************************************/
+std::string to_string(const BER_Object& obj)
+   {
+   return std::string(reinterpret_cast<const char*>(obj.value.begin()),
+                      obj.value.size());
+   }
+
+/*************************************************
+* Do heuristic tests for BER data                *
+*************************************************/
+bool maybe_BER(DataSource& source)
+   {
+   byte first_byte;
+   if(!source.peek_byte(first_byte))
+      throw Stream_IO_Error("ASN1::maybe_BER: Source was empty");
+
+   if(first_byte == (SEQUENCE | CONSTRUCTED))
+      return true;
+   return false;
+   }
+
+}
+
+}