initial import of Monero base code

2023-07-16 22:00:52 +01:00
parent 2af40522f9
commit bf78bd79a1
1294 changed files with 659699 additions and 0 deletions
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+// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+// * Neither the name of the Andrey N. Sabelnikov nor the
+// names of its contributors may be used to endorse or promote products
+// derived from this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER  BE LIABLE FOR ANY
+// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// 
+
+
+#ifndef _STRING_CODING_H_
+#define _STRING_CODING_H_
+
+#include <string>
+
+namespace epee
+{
+namespace string_encoding
+{
+	inline 
+	const std::string& base64_chars()
+	{
+
+		static std::string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+			"abcdefghijklmnopqrstuvwxyz"
+			"0123456789+/";
+
+		return chars;
+
+	}
+
+	inline
+	std::string base64_encode(unsigned char const* bytes_to_encode, size_t in_len) {
+		std::string ret;
+		int i = 0;
+		int j = 0;
+		unsigned char char_array_3[3];
+		unsigned char char_array_4[4];
+
+		while (in_len--) {
+			char_array_3[i++] = *(bytes_to_encode++);
+			if (i == 3) {
+				char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
+				char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
+				char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
+				char_array_4[3] = char_array_3[2] & 0x3f;
+
+				for(i = 0; (i <4) ; i++)
+					ret += base64_chars()[char_array_4[i]];
+				i = 0;
+			}
+		}
+
+		if (i)
+		{
+			for(j = i; j < 3; j++)
+				char_array_3[j] = '\0';
+
+			char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
+			char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
+			char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
+			char_array_4[3] = char_array_3[2] & 0x3f;
+
+			for (j = 0; (j < i + 1); j++)
+				ret += base64_chars()[char_array_4[j]];
+
+			while((i++ < 3))
+				ret += '=';
+
+		}
+
+		return ret;
+
+	}
+
+	inline
+		std::string base64_encode(const std::string& str) 
+	{
+		return base64_encode((unsigned char const* )str.data(), str.size());
+	}
+
+	inline bool is_base64(unsigned char c) {
+		return (isalnum(c) || (c == '+') || (c == '/'));
+	}
+
+
+	inline
+	std::string base64_decode(std::string const& encoded_string) {
+		size_t in_len = encoded_string.size();
+		size_t i = 0;
+		size_t j = 0;
+		size_t in_ = 0;
+		unsigned char char_array_4[4], char_array_3[3];
+		std::string ret;
+
+		while (in_len-- && ( encoded_string[in_] != '=') && is_base64(encoded_string[in_])) {
+			char_array_4[i++] = encoded_string[in_]; in_++;
+			if (i ==4) {
+				for (i = 0; i <4; i++)
+					char_array_4[i] = (unsigned char)base64_chars().find(char_array_4[i]);
+
+				char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
+				char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
+				char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];
+
+				for (i = 0; (i < 3); i++)
+					ret += char_array_3[i];
+				i = 0;
+			}
+		}
+
+		if (i) {
+			for (j = i; j <4; j++)
+				char_array_4[j] = 0;
+
+			for (j = 0; j <4; j++)
+				char_array_4[j] = (unsigned char)base64_chars().find(char_array_4[j]);
+
+			char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
+			char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
+			char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];
+
+			for (j = 0; (j < i - 1); j++) ret += char_array_3[j];
+		}
+
+		return ret;
+	}
+
+}
+}
+
+#endif //_STRING_CODING_H_