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-rw-r--r--mysql/extra/yassl/taocrypt/src/coding.cpp266
1 files changed, 266 insertions, 0 deletions
diff --git a/mysql/extra/yassl/taocrypt/src/coding.cpp b/mysql/extra/yassl/taocrypt/src/coding.cpp
new file mode 100644
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+++ b/mysql/extra/yassl/taocrypt/src/coding.cpp
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+/*
+ 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
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