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/*************************************************
* ASN.1 Internals Source File *
* (C) 1999-2008 The Botan Project *
*************************************************/
#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;
}
}
}
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