From 354bb40e75d94466e91fe6960523612c9d17ccfb Mon Sep 17 00:00:00 2001 From: Karen Arutyunov Date: Thu, 2 Nov 2017 23:11:29 +0300 Subject: Add implementation --- mysql/extra/yassl/taocrypt/src/coding.cpp | 266 ++++++++++++++++++++++++++++++ 1 file changed, 266 insertions(+) create mode 100644 mysql/extra/yassl/taocrypt/src/coding.cpp (limited to 'mysql/extra/yassl/taocrypt/src/coding.cpp') diff --git a/mysql/extra/yassl/taocrypt/src/coding.cpp b/mysql/extra/yassl/taocrypt/src/coding.cpp new file mode 100644 index 0000000..bc4727c --- /dev/null +++ b/mysql/extra/yassl/taocrypt/src/coding.cpp @@ -0,0 +1,266 @@ +/* + Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; see the file COPYING. If not, write to the + Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, + MA 02110-1301 USA. +*/ + +/* coding.cpp implements hex and base64 encoding/decoing +*/ + +#include "runtime.hpp" +#include "coding.hpp" +#include "file.hpp" + + +namespace TaoCrypt { + + +namespace { // locals + +const byte bad = 0xFF; // invalid encoding + +const byte hexEncode[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', + 'A', 'B', 'C', 'D', 'E', 'F' + }; + +const byte hexDecode[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, + bad, bad, bad, bad, bad, bad, bad, + 10, 11, 12, 13, 14, 15 + }; // A starts at 0x41 not 0x3A + + +const byte base64Encode[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', + 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', + 'U', 'V', 'W', 'X', 'Y', 'Z', + 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', + 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', + 'u', 'v', 'w', 'x', 'y', 'z', + '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', + '+', '/' + }; + +const byte base64Decode[] = { 62, bad, bad, bad, 63, // + starts at 0x2B + 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, + bad, bad, bad, bad, bad, bad, bad, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, + 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, + 20, 21, 22, 23, 24, 25, + bad, bad, bad, bad, bad, bad, + 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, + 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, + 46, 47, 48, 49, 50, 51 + }; + +const byte pad = '='; +const int pemLineSz = 64; + +} // local namespace + + +// Hex Encode +void HexEncoder::Encode() +{ + word32 bytes = plain_.size(); + encoded_.New(bytes * 2); + + word32 i = 0; + + while (bytes--) { + byte p = plain_.next(); + + byte b = p >> 4; + byte b2 = p & 0xF; + + encoded_[i++] = hexEncode[b]; + encoded_[i++] = hexEncode[b2]; + } + + plain_.reset(encoded_); +} + + +// Hex Decode +void HexDecoder::Decode() +{ + word32 bytes = coded_.size(); + decoded_.New(bytes / 2); + + word32 i(0); + + while (bytes) { + byte b = coded_.next() - 0x30; // 0 starts at 0x30 + byte b2 = coded_.next() - 0x30; + + // sanity checks + if (b >= sizeof(hexDecode)/sizeof(hexDecode[0])) { + coded_.SetError(PEM_E); + return; + } + if (b2 >= sizeof(hexDecode)/sizeof(hexDecode[0])) { + coded_.SetError(PEM_E); + return; + } + + b = hexDecode[b]; + b2 = hexDecode[b2]; + + decoded_[i++] = (b << 4) | b2; + bytes -= 2; + } + + coded_.reset(decoded_); +} + + +// Base 64 Encode +void Base64Encoder::Encode() +{ + word32 bytes = plain_.size(); + word32 outSz = (bytes + 3 - 1) / 3 * 4; + + outSz += (outSz + pemLineSz - 1) / pemLineSz; // new lines + encoded_.New(outSz); + + word32 i = 0; + word32 j = 0; + + while (bytes > 2) { + byte b1 = plain_.next(); + byte b2 = plain_.next(); + byte b3 = plain_.next(); + + // encoded idx + byte e1 = b1 >> 2; + byte e2 = ((b1 & 0x3) << 4) | (b2 >> 4); + byte e3 = ((b2 & 0xF) << 2) | (b3 >> 6); + byte e4 = b3 & 0x3F; + + // store + encoded_[i++] = base64Encode[e1]; + encoded_[i++] = base64Encode[e2]; + encoded_[i++] = base64Encode[e3]; + encoded_[i++] = base64Encode[e4]; + + bytes -= 3; + + if ((++j % 16) == 0 && bytes) + encoded_[i++] = '\n'; + } + + // last integral + if (bytes) { + bool twoBytes = (bytes == 2); + + byte b1 = plain_.next(); + byte b2 = (twoBytes) ? plain_.next() : 0; + + byte e1 = b1 >> 2; + byte e2 = ((b1 & 0x3) << 4) | (b2 >> 4); + byte e3 = (b2 & 0xF) << 2; + + encoded_[i++] = base64Encode[e1]; + encoded_[i++] = base64Encode[e2]; + encoded_[i++] = (twoBytes) ? base64Encode[e3] : pad; + encoded_[i++] = pad; + } + + encoded_[i++] = '\n'; + + if (i == outSz) + plain_.reset(encoded_); +} + + +// Base 64 Decode +void Base64Decoder::Decode() +{ + word32 bytes = coded_.size(); + word32 plainSz = bytes - ((bytes + (pemLineSz - 1)) / pemLineSz); + const byte maxIdx = (byte)sizeof(base64Decode) + 0x2B - 1; + plainSz = ((plainSz * 3) / 4) + 3; + decoded_.New(plainSz); + + word32 i = 0; + word32 j = 0; + + while (bytes > 3) { + byte e1 = coded_.next(); + byte e2 = coded_.next(); + byte e3 = coded_.next(); + byte e4 = coded_.next(); + + if (e1 == 0) // end file 0's + break; + + bool pad3 = false; + bool pad4 = false; + if (e3 == pad) + pad3 = true; + if (e4 == pad) + pad4 = true; + + if (e1 < 0x2B || e2 < 0x2B || e3 < 0x2B || e4 < 0x2B) { + coded_.SetError(PEM_E); + return; + } + + if (e1 > maxIdx || e2 > maxIdx || e3 > maxIdx || e4 > maxIdx) { + coded_.SetError(PEM_E); + return; + } + + e1 = base64Decode[e1 - 0x2B]; + e2 = base64Decode[e2 - 0x2B]; + e3 = (e3 == pad) ? 0 : base64Decode[e3 - 0x2B]; + e4 = (e4 == pad) ? 0 : base64Decode[e4 - 0x2B]; + + byte b1 = (e1 << 2) | (e2 >> 4); + byte b2 = ((e2 & 0xF) << 4) | (e3 >> 2); + byte b3 = ((e3 & 0x3) << 6) | e4; + + decoded_[i++] = b1; + if (!pad3) + decoded_[i++] = b2; + if (!pad4) + decoded_[i++] = b3; + else + break; + + bytes -= 4; + if ((++j % 16) == 0) { + byte endLine = coded_.next(); + bytes--; + while (endLine == ' ') { // remove possible whitespace + endLine = coded_.next(); + bytes--; + } + if (endLine == '\r') { + endLine = coded_.next(); + bytes--; + } + if (endLine != '\n') { + coded_.SetError(PEM_E); + return; + } + } + } + + if (i != decoded_.size()) + decoded_.resize(i); + coded_.reset(decoded_); +} + + +} // namespace -- cgit v1.1