diff options
Diffstat (limited to 'src/codec/hex/hex.cpp')
-rw-r--r-- | src/codec/hex/hex.cpp | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/src/codec/hex/hex.cpp b/src/codec/hex/hex.cpp deleted file mode 100644 index 651899b73..000000000 --- a/src/codec/hex/hex.cpp +++ /dev/null @@ -1,193 +0,0 @@ -/* -* Hex Encoder/Decoder -* (C) 1999-2007 Jack Lloyd -* -* Distributed under the terms of the Botan license -*/ - -#include <botan/hex.h> -#include <botan/parsing.h> -#include <botan/charset.h> -#include <botan/exceptn.h> -#include <algorithm> - -namespace Botan { - -const u32bit HEX_CODEC_BUFFER_SIZE = 256; - -/* -* Hex_Encoder Constructor -*/ -Hex_Encoder::Hex_Encoder(bool breaks, u32bit length, Case c) : - casing(c), line_length(breaks ? length : 0) - { - in.resize(HEX_CODEC_BUFFER_SIZE); - out.resize(2*in.size()); - counter = position = 0; - } - -/* -* Hex_Encoder Constructor -*/ -Hex_Encoder::Hex_Encoder(Case c) : casing(c), line_length(0) - { - in.resize(HEX_CODEC_BUFFER_SIZE); - out.resize(2*in.size()); - counter = position = 0; - } - -/* -* Hex Encoding Operation -*/ -void Hex_Encoder::encode(byte in, byte out[2], Hex_Encoder::Case casing) - { - const byte* BIN_TO_HEX = ((casing == Uppercase) ? BIN_TO_HEX_UPPER : - BIN_TO_HEX_LOWER); - - out[0] = BIN_TO_HEX[((in >> 4) & 0x0F)]; - out[1] = BIN_TO_HEX[((in ) & 0x0F)]; - } - -/* -* Encode and send a block -*/ -void Hex_Encoder::encode_and_send(const byte block[], u32bit length) - { - for(u32bit j = 0; j != length; ++j) - encode(block[j], out + 2*j, casing); - - if(line_length == 0) - send(out, 2*length); - else - { - u32bit remaining = 2*length, offset = 0; - while(remaining) - { - u32bit sent = std::min(line_length - counter, remaining); - send(out + offset, sent); - counter += sent; - remaining -= sent; - offset += sent; - if(counter == line_length) - { - send('\n'); - counter = 0; - } - } - } - } - -/* -* Convert some data into hex format -*/ -void Hex_Encoder::write(const byte input[], u32bit length) - { - in.copy(position, input, length); - if(position + length >= in.size()) - { - encode_and_send(in, in.size()); - input += (in.size() - position); - length -= (in.size() - position); - while(length >= in.size()) - { - encode_and_send(input, in.size()); - input += in.size(); - length -= in.size(); - } - in.copy(input, length); - position = 0; - } - position += length; - } - -/* -* Flush buffers -*/ -void Hex_Encoder::end_msg() - { - encode_and_send(in, position); - if(counter && line_length) - send('\n'); - counter = position = 0; - } - -/* -* Hex_Decoder Constructor -*/ -Hex_Decoder::Hex_Decoder(Decoder_Checking c) : checking(c) - { - in.resize(HEX_CODEC_BUFFER_SIZE); - out.resize(in.size() / 2); - position = 0; - } - -/* -* Check if a character is a valid hex char -*/ -bool Hex_Decoder::is_valid(byte in) - { - return (HEX_TO_BIN[in] != 0x80); - } - -/* -* Handle processing an invalid character -*/ -void Hex_Decoder::handle_bad_char(byte c) - { - if(checking == NONE) - return; - - if((checking == IGNORE_WS) && Charset::is_space(c)) - return; - - throw Decoding_Error("Hex_Decoder: Invalid hex character: " + - to_string(c)); - } - -/* -* Hex Decoding Operation -*/ -byte Hex_Decoder::decode(const byte hex[2]) - { - return ((HEX_TO_BIN[hex[0]] << 4) | HEX_TO_BIN[hex[1]]); - } - -/* -* Decode and send a block -*/ -void Hex_Decoder::decode_and_send(const byte block[], u32bit length) - { - for(u32bit j = 0; j != length / 2; ++j) - out[j] = decode(block + 2*j); - send(out, length / 2); - } - -/* -* Convert some data from hex format -*/ -void Hex_Decoder::write(const byte input[], u32bit length) - { - for(u32bit j = 0; j != length; ++j) - { - if(is_valid(input[j])) - in[position++] = input[j]; - else - handle_bad_char(input[j]); - if(position == in.size()) - { - decode_and_send(in, in.size()); - position = 0; - } - } - } - -/* -* Flush buffers -*/ -void Hex_Decoder::end_msg() - { - decode_and_send(in, position); - position = 0; - } - -} |