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File: [Pegasus] / pegasus / src / Pegasus / Common / Base64.cpp
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Revision: 1.26, Tue Nov 7 21:30:36 2006 UTC (17 years, 7 months ago) by kumpf Branch: MAIN CVS Tags: TASK-PEP328_SOLARIS_IX86_CC_PORT-root, TASK-PEP328_SOLARIS_IX86_CC_PORT-branch, TASK-PEP305_VXWORKS-root, TASK-PEP305_VXWORKS-branch-pre-solaris-port, TASK-PEP305_VXWORKS-branch-post-solaris-port, TASK-PEP305_VXWORKS-branch-beta2, TASK-PEP305_VXWORKS-branch, TASK-PEP305_VXWORKS-2008-10-23, TASK-PEP291_IPV6-root, TASK-PEP291_IPV6-branch, TASK-PEP286_PRIVILEGE_SEPARATION-root, TASK-PEP286_PRIVILEGE_SEPARATION-branch, TASK-PEP274_dacim-root, TASK-PEP274_dacim-merged_out_to_branch, TASK-PEP274_dacim-merged_out_from_trunk, TASK-PEP274_dacim-merged_in_to_trunk, TASK-PEP274_dacim-merged_in_from_branch, TASK-PEP274_dacim-branch, TASK-Bug2102_RCMPIWindows-root, TASK-Bug2102_RCMPIWindows-merged_out_to_branch, TASK-Bug2102_RCMPIWindows-merged_out_from_trunk, TASK-Bug2102_RCMPIWindows-merged_in_to_trunk, TASK-Bug2102_RCMPIWindows-merged_in_from_branch, TASK-Bug2102_RCMPIWindows-branch, TASK-Bug2102Final-root, TASK-Bug2102Final-merged_out_to_branch, TASK-Bug2102Final-merged_out_from_trunk, TASK-Bug2102Final-merged_in_to_trunk, TASK-Bug2102Final-merged_in_from_branch, TASK-Bug2102Final-branch, TASK-BUG7240-root, TASK-BUG7240-branch, TASK-BUG7146_SqlRepositoryPrototype-root, TASK-BUG7146_SqlRepositoryPrototype-merged_out_to_branch, TASK-BUG7146_SqlRepositoryPrototype-merged_out_from_trunk, TASK-BUG7146_SqlRepositoryPrototype-merged_in_to_trunk, TASK-BUG7146_SqlRepositoryPrototype-merged_in_from_branch, TASK-BUG7146_SqlRepositoryPrototype-branch, RELEASE_2_8_0_BETA, RELEASE_2_8_0-FC, RELEASE_2_7_3-RC1, RELEASE_2_7_3, RELEASE_2_7_2-RC1, RELEASE_2_7_2, RELEASE_2_7_1-RC1, RELEASE_2_7_1, RELEASE_2_7_0-RC1, RELEASE_2_7_0-BETA, RELEASE_2_7_0, RELEASE_2_7-root, RELEASE_2_7-branch, RELEASE_2_6_3-RC2, RELEASE_2_6_3-RC1, RELEASE_2_6_3, RELEASE_2_6_2-RC1, RELEASE_2_6_2, RELEASE_2_6_1-RC1, RELEASE_2_6_1, RELEASE_2_6_0-RC1, RELEASE_2_6_0-FC, RELEASE_2_6_0, RELEASE_2_6-root, RELEASE_2_6-branch-clean, RELEASE_2_6-branch, PEP286_PRIVILEGE_SEPARATION_ROOT, PEP286_PRIVILEGE_SEPARATION_CODE_FREEZE, PEP286_PRIVILEGE_SEPARATION_BRANCH, PEP286_PRIVILEGE_SEPARATION_1, Makefile Branch point for: TASK-PEP328_SOLARIS_IX86_CC_PORT-branch-v2 Changes since 1.25: +18 -14 lines BUG#: 5819 TITLE: Common modules do not meet chksrc requirements DESCRIPTION: Remove tab characters and author names and shorten lines that are wider than 80 characters. |
//%2006//////////////////////////////////////////////////////////////////////// // // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems. // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.; // IBM Corp.; EMC Corporation, The Open Group. // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.; // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group. // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.; // EMC Corporation; VERITAS Software Corporation; The Open Group. // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.; // EMC Corporation; Symantec Corporation; The Open Group. // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to // deal in the Software without restriction, including without limitation the // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or // sell copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. // //============================================================================== // //%///////////////////////////////////////////////////////////////////////////// #include "Base64.h" #include <Pegasus/Common/ArrayInternal.h> PEGASUS_NAMESPACE_BEGIN PEGASUS_USING_STD; #ifdef PEGASUS_PLATFORM_AIX_RS_IBMCXX #define inline #endif //********************************************************** /* Encode thanslates one six-bit pattern into a base-64 character. Unsigned char is used to represent a six-bit stream of date. */ inline PEGASUS_COMMON_LINKAGE char Base64::_Encode(Uint8 uc) { if (uc < 26) return 'A'+uc; if (uc < 52) return 'a'+(uc-26); if (uc < 62) return '0'+(uc-52); if (uc == 62) return '+'; return '/'; }; // Helper function returns true is a character is a valid base-64 character // and false otherwise. inline Boolean Base64::_IsBase64(char c) { if (c >= 'A' && c <= 'Z') return true; if (c >= 'a' && c <= 'z') return true; if (c >= '0' && c <= '9') return true; if (c == '+') return true; if (c == '/') return true; if (c == '=') return true; return false; }; // Translate one base-64 character into a six bit pattern inline Uint8 Base64::_Decode(char c) { if (c >= 'A' && c <= 'Z') return c - 'A'; if (c >= 'a' && c <= 'z') return c - 'a' + 26; if (c >= '0' && c <= '9') return c - '0' + 52; if (c == '+') return 62; return 63; }; //************************************************************* /* Encode static method takes an array of 8-bit values and returns a base-64 stream. ATTN: KS feb 2002 - This is probably a very slow an inefficient implementation and could be improved if it is required for production. Today it is only for test programs. */ Buffer Base64::encode(const Buffer& vby) { Buffer retArray; // If nothing in input string, return empty string if (vby.size() == 0) return retArray; // for every character in the input array taken 3 bytes at a time for (Uint32 i=0; i < vby.size(); i+=3) { // Create from 3 8 bit values to 4 6 bit values Uint8 by1=0,by2=0,by3=0; by1 = vby[i]; if (i+1<vby.size()) { by2 = vby[i+1]; }; if (i+2<vby.size()) { by3 = vby[i+2]; } Uint8 by4=0,by5=0,by6=0,by7=0; by4 = by1>>2; by5 = ((by1&0x3)<<4)|(by2>>4); by6 = ((by2&0xf)<<2)|(by3>>6); by7 = by3&0x3f; retArray.append(_Encode(by4)); retArray.append(_Encode(by5)); if (i+1<vby.size()) retArray.append( _Encode(by6)); else retArray.append('='); if (i+2<vby.size()) retArray.append( _Encode(by7)); else retArray.append('='); /* ATTN: Need to fix this. It adds unwanted cr-lf after 4 chars. if (i % (76/4*3) == 0) { retArray.append( '\r'); retArray.append( '\n'); } */ }; return retArray; }; /* I checked for the zero length. The algorithm would also work for zero length input stream, but I’m pretty adamant about handling border conditions. They are often the culprits of run-time production failures. The algorithm goes thru each three bytes of data at a time. The first thing I do is to shift the bits around from three 8-bit values to four 6-bit values. Then I encode the 6-bit values and add then one at a time to the output stream. This is actually quite inefficient. The STL character array is being allocated one byte at a time. The algorithm would be much faster, if I pre-allocated that array. I’ll leave that as an optimization practical exercise for the reader. */ /* The decode static method takes a base-64 stream and converts it to an array of 8-bit values. */ Buffer Base64::decode(const Buffer& strInput) { //Strip any non-base64 characters from the input Buffer str; for (Uint32 j=0;j<strInput.size();j++) { if (_IsBase64(strInput[j])) str.append(strInput[j]); } Buffer retArray; // Return if the input is zero length if (str.size() == 0) return retArray; // comment for (Uint32 i=0; i < str.size(); i+=4) { char c1='A',c2='A',c3='A',c4='A'; c1 = str[i]; if (i+1<str.size()) c2 = str[i+1]; if (i+2<str.size()) c3 = str[i+2]; if (i+3<str.size()) c4 = str[i+3]; Uint8 by1=0,by2=0,by3=0,by4=0; by1 = _Decode(c1); by2 = _Decode(c2); by3 = _Decode(c3); by4 = _Decode(c4); //cout << "base::64decode bytes" << // " 1 " << c1 << " " << by1 << // " 2 " << c2 << " " << by2 << // " 3 " << c3 << " " << by3 << // " 4 " << c4 << " " << by4 << endl; // append first byte by shifting retArray.append( static_cast<char>((by1<<2)|(by2>>4)) ); // append second byte if not padding if (c3 != '=') retArray.append( static_cast<char>(((by2&0xf)<<4)|(by3>>2)) ); if (c4 != '=') retArray.append( static_cast<char>(((by3&0x3)<<6)|by4) ); } return retArray; }; PEGASUS_NAMESPACE_END
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