00001 /* Copyright 2000-2005 The Apache Software Foundation or its licensors, as 00002 * applicable. 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 * The apr_vsnprintf/apr_snprintf functions are based on, and used with the 00016 * permission of, the SIO stdio-replacement strx_* functions by Panos 00017 * Tsirigotis <panos@alumni.cs.colorado.edu> for xinetd. 00018 */ 00019 00020 /** 00021 * @file apr_base64.h 00022 * @brief APR-UTIL Base64 Encoding 00023 */ 00024 #ifndef APR_BASE64_H 00025 #define APR_BASE64_H 00026 00027 #include "apu.h" 00028 #include "apr_general.h" 00029 00030 #ifdef __cplusplus 00031 extern "C" { 00032 #endif 00033 00034 /** 00035 * @defgroup APR_Util_Base64 Base64 Encoding 00036 * @ingroup APR_Util 00037 * @{ 00038 */ 00039 00040 /* Simple BASE64 encode/decode functions. 00041 * 00042 * As we might encode binary strings, hence we require the length of 00043 * the incoming plain source. And return the length of what we decoded. 00044 * 00045 * The decoding function takes any non valid char (i.e. whitespace, \0 00046 * or anything non A-Z,0-9 etc as terminal. 00047 * 00048 * plain strings/binary sequences are not assumed '\0' terminated. Encoded 00049 * strings are neither. But probably should. 00050 * 00051 */ 00052 00053 /** 00054 * Given the length of an un-encrypted string, get the length of the 00055 * encrypted string. 00056 * @param len the length of an unencrypted string. 00057 * @return the length of the string after it is encrypted 00058 */ 00059 APU_DECLARE(int) apr_base64_encode_len(int len); 00060 00061 /** 00062 * Encode a text string using base64encoding. 00063 * @param coded_dst The destination string for the encoded string. 00064 * @param plain_src The original string in plain text 00065 * @param len_plain_src The length of the plain text string 00066 * @return the length of the encoded string 00067 */ 00068 APU_DECLARE(int) apr_base64_encode(char * coded_dst, const char *plain_src, 00069 int len_plain_src); 00070 00071 /** 00072 * Encode an EBCDIC string using base64encoding. 00073 * @param coded_dst The destination string for the encoded string. 00074 * @param plain_src The original string in plain text 00075 * @param len_plain_src The length of the plain text string 00076 * @return the length of the encoded string 00077 */ 00078 APU_DECLARE(int) apr_base64_encode_binary(char * coded_dst, 00079 const unsigned char *plain_src, 00080 int len_plain_src); 00081 00082 /** 00083 * Determine the length of a plain text string given the encoded version 00084 * @param coded_src The encoded string 00085 * @return the length of the plain text string 00086 */ 00087 APU_DECLARE(int) apr_base64_decode_len(const char * coded_src); 00088 00089 /** 00090 * Decode a string to plain text 00091 * @param plain_dst The destination string for the plain text 00092 * @param coded_src The encoded string 00093 * @return the length of the plain text string 00094 */ 00095 APU_DECLARE(int) apr_base64_decode(char * plain_dst, const char *coded_src); 00096 00097 /** 00098 * Decode an EBCDIC string to plain text 00099 * @param plain_dst The destination string for the plain text 00100 * @param coded_src The encoded string 00101 * @return the length of the plain text string 00102 */ 00103 APU_DECLARE(int) apr_base64_decode_binary(unsigned char * plain_dst, 00104 const char *coded_src); 00105 00106 /** @} */ 00107 #ifdef __cplusplus 00108 } 00109 #endif 00110 00111 #endif /* !APR_BASE64_H */