apr_base64.h

Apache V2.0.15 Alpha For Linuxhttpd-2_0_15-alpha.tar.Z

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 *    Alternately, this acknowledgment may appear in the software itself,
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
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 * <http://www.apache.org/>.
 *
 * The apr_vsnprintf/apr_snprintf functions are based on, and used with the
 * permission of, the  SIO stdio-replacement strx_* functions by Panos
 * Tsirigotis <[e-mail]> for xinetd.
 */

#ifndef APR_BASE64_H
#define APR_BASE64_H

#include "apu.h"
#include "apr_general.h"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @package Base64 Encoding
 */

/* Simple BASE64 encode/decode functions.
 * 
 * As we might encode binary strings, hence we require the length of
 * the incoming plain source. And return the length of what we decoded.
 *
 * The decoding function takes any non valid char (i.e. whitespace, \0
 * or anything non A-Z,0-9 etc as terminal.
 * 
 * plain strings/binary sequences are not assumed '\0' terminated. Encoded
 * strings are neither. But probably should.
 *
 */

/**
 * Given the length of an un-encrypted string, get the length of the 
 * encrypted string.
 * @param len the length of an unencrypted string.
 * @return the length of the string after it is encrypted
 * @deffunc int apr_base64_encode_len(int len)
 */ 
APU_DECLARE(int) apr_base64_encode_len(int len);

/**
 * Encode a text string using base64encoding.
 * @param coded_dst The destination string for the encoded string.
 * @param plain_src The original string in plain text
 * @param len_plain_src The length of the plain text string
 * @return the length of the encoded string
 * @deffunc int apr_base64_encode(char *coded_dst, const char *plain_src, int len_plain_src)
 */ 
APU_DECLARE(int) apr_base64_encode(char * coded_dst, const char *plain_src, 
                                 int len_plain_src);

/**
 * Encode an EBCDIC string using base64encoding.
 * @param coded_dst The destination string for the encoded string.
 * @param plain_src The original string in plain text
 * @param len_plain_src The length of the plain text string
 * @return the length of the encoded string
 * @deffunc int apr_base64_encode_binary(char *coded_dst, const char *plain_src, int len_plain_src)
 */ 
APU_DECLARE(int) apr_base64_encode_binary(char * coded_dst, 
                                        const unsigned char *plain_src,
                                        int len_plain_src);

/**
 * Determine the length of a plain text string given the encoded version
 * @param coded_src The encoded string
 * @return the length of the plain text string
 * @deffunc int apr_base64_decode_len(const char *coded_src)
 */ 
APU_DECLARE(int) apr_base64_decode_len(const char * coded_src);

/**
 * Decode a string to plain text
 * @param plain_dst The destination string for the plain text
 * @param coded_src The encoded string 
 * @return the length of the plain text string
 * @deffunc int apr_base64_decode(char *plain_dst, const char *coded_src)
 */ 
APU_DECLARE(int) apr_base64_decode(char * plain_dst, const char *coded_src);

/**
 * Decode an EBCDIC string to plain text
 * @param plain_dst The destination string for the plain text
 * @param coded_src The encoded string 
 * @return the length of the plain text string
 * @deffunc int apr_base64_decode_binary(char *plain_dst, const char *coded_src)
 */ 
APU_DECLARE(int) apr_base64_decode_binary(unsigned char * plain_dst, 
                                        const char *coded_src);

#ifdef __cplusplus
}
#endif

#endif	/* !APR_BASE64_H */