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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file apr_encode.h
* @brief APR-UTIL Encoding
*/
#ifndef APR_ENCODE_H
#define APR_ENCODE_H
#include "apr.h"
#include "apr_general.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup APR_Util_Encode Base64/Base64Url/Base32/Base32Hex/Base16 Encoding
* @ingroup APR_Util
* @{
*/
/**
* RFC4648 and RFC7515 compliant BASE64, BASE64URL, BASE32, BASE32HEX
* and BASE16 encode/decode functions.
*
* The following encodings are supported:
*
* - Base 64 Encoding
*
* o Use flag APR_ENCODE_NONE
* o https://tools.ietf.org/html/rfc4648#section-4
*
* - Base 64 Encoding with URL and Filename Safe Alphabet
*
* o Use flag APR_ENCODE_URL
* o https://tools.ietf.org/html/rfc4648#section-5
*
* - Base 64 URL Encoding without Padding
*
* o Use flag APR_ENCODE_BASE64URL
* o https://tools.ietf.org/html/rfc7515#appendix-C
*
* - Base 32 Encoding
*
* o Use flag APR_ENCODE_NONE
* o https://tools.ietf.org/html/rfc4648#section-6
*
* - Base 32 Encoding with Extended Hex Alphabet
*
* o Use flag APR_ENCODE_BASE32HEX
* o https://tools.ietf.org/html/rfc4648#section-7
*
* - Base 16 Encoding
*
* o Use flags APR_ENCODE_NONE/APR_ENCODE_COLON
* o https://tools.ietf.org/html/rfc4648#section-8
*
* If a non valid character of any kind including whitespace is passed to any
* of the decoder functions, APR_BADCH will be returned. In this case decoding
* will still take place, but the results can not be trusted.
*
* If APR_ENCODE_RELAXED is passed to the decoder functions, decoding will be
* attempted up until the first non valid character. If this results in an
* invalid state in the decoder, such as but not limited to an odd number of
* base16 characters, APR_BADCH will still be returned.
*
* If APR_ENCODE_RELAXED is not passed to a decoder function, the decoding will
* be done in constant time regardless of whether the result returns APR_SUCCESS
* or APR_BADCH.
*
* If the dest parameter is NULL, the maximum theoretical buffer size is
* returned in the len field, including space for a terminating zero character
* if the destination is a string. This value can be used to allocate buffers
* of a suitable safe size.
*
* If the dest parameter is provided, the encoding or decoding will take place,
* and the actual number of characters written is returned in the len field,
* ignoring any terminating zero.
*
* Plain strings are not assumed '\0' terminated unless APR_ENCODE_STRING is
* provided.
*
*/
/**
* When passing a string to one of the encode functions, this value can be
* passed to indicate a string-valued key, and have the length computed
* automatically.
*/
#define APR_ENCODE_STRING (-1)
/**
* Generate RFC4648 base16/base32/base64.
*/
#define APR_ENCODE_NONE 0
/**
* If relaxed, decode up until the first non base16/base32/base64 character.
*/
#define APR_ENCODE_RELAXED 1
/**
* Omit the padding character (=) while encoding.
*/
#define APR_ENCODE_NOPADDING 2
/**
* Generate RFC4648 Base 64 Encoding with URL and Filename Safe Alphabet
*/
#define APR_ENCODE_URL 4
/**
* Generate RFC7515 BASE64URL
*/
#define APR_ENCODE_BASE64URL (APR_ENCODE_NOPADDING | APR_ENCODE_URL)
/**
* Generate base32hex encoding instead of base32 encoding
*/
#define APR_ENCODE_BASE32HEX 8
/**
* Generate base16 with colons between each token.
*/
#define APR_ENCODE_COLON 16
/**
* Generate base16 with lower case characters.
*/
#define APR_ENCODE_LOWER 32
/**
* Convert text data to base64.
* @param dest The destination string, can be NULL to output in \c len the
* needed buffer length for encoding.
* @param src The original string, can be NULL if \c dest is NULL and \c slen
* is positive or nul.
* @param slen The length of the original string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, emit RFC4648 Base 64 Encoding. If
* APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_URL,
* use RFC4648 Base 64 Encoding with URL and Filename Safe Alphabet.
* If APR_ENCODE_BASE64URL, use RFC7515 base64url Encoding.
* @param len If not NULL, outputs the length of the buffer needed for encoding
* (including the trailing NUL) if \c dest is NULL, or the actual length of
* the encoding (excluding the trailing NUL) if \c dest is not NULL.
* @return APR_SUCCESS, or APR_EINVAL if \c slen is not APR_ENCODE_STRING and
* negative, or APR_NOTFOUND if \c dest is not NULL and \c src is NULL, or
* APR_ENOSPC if \c dest is NULL and the source length (based on \c slen or
* APR_ENCODE_STRING) is too big to encode.
*/
APR_DECLARE(apr_status_t) apr_encode_base64(char *dest, const char *src,
apr_ssize_t slen, int flags, apr_size_t * len);
/**
* Convert binary data to base64.
* @param dest The destination string, can be NULL to output in \c len the
* needed buffer length for encoding.
* @param src The original buffer, can be NULL if \c dest is NULL.
* @param slen The length of the original buffer.
* @param flags If APR_ENCODE_NONE, emit RFC4648 Base 64 Encoding. If
* APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_URL,
* use RFC4648 Base 64 Encoding with URL and Filename Safe Alphabet.
* If APR_ENCODE_BASE64URL, use RFC7515 base64url Encoding.
* @param len If not NULL, outputs the length of the buffer needed for encoding
* (including the trailing NUL) if \c dest is NULL, or the actual length of
* the encoding (excluding the trailing NUL) if \c dest is not NULL.
* @return APR_SUCCESS, or APR_EINVAL if \c slen is negative, or APR_NOTFOUND
* if \c dest is not NULL and \c src is NULL, or APR_ENOSPC if \c dest is NULL
* and the source length (based on \c slen or APR_ENCODE_STRING) is too big to
* encode.
*/
APR_DECLARE(apr_status_t) apr_encode_base64_binary(char *dest, const unsigned char *src,
apr_ssize_t slen, int flags, apr_size_t * len);
/**
* Convert text data to base64, and return the results from a pool.
* @param p Pool to allocate from.
* @param src The original string.
* @param slen The length of the original string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, emit RFC4648 Base 64 Encoding. If
* APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_URL,
* use RFC4648 Base 64 Encoding with URL and Filename Safe Alphabet.
* If APR_ENCODE_BASE64URL, use RFC7515 base64url Encoding.
* @param len If not NULL, outputs the length of the encoding (excluding the
* trailing NUL).
* @return A NUL terminated string allocated from the pool on success,
* or NULL if src is NULL or allocation failed or the encoding is not
* possible (see apr_encode_base64 errors).
*/
APR_DECLARE(const char *)apr_pencode_base64(apr_pool_t * p, const char *src,
apr_ssize_t slen, int flags, apr_size_t * len)__attribute__((nonnull(1)));
/**
* Convert binary data to base64, and return the results from a pool.
* @param p Pool to allocate from.
* @param src The original buffer.
* @param slen The length of the original buffer.
* @param flags If APR_ENCODE_NONE, emit RFC4648 Base 64 Encoding. If
* APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_URL,
* use RFC4648 Base 64 Encoding with URL and Filename Safe Alphabet.
* If APR_ENCODE_BASE64URL, use RFC7515 base64url Encoding.
* @param len If not NULL, outputs the length of the encoding (excluding the
* trailing NUL).
* @return A NUL terminated string allocated from the pool on success,
* or NULL if src is NULL or allocation failed or the encoding is not
* possible (see apr_encode_base64_binary errors).
*/
APR_DECLARE(const char *)apr_pencode_base64_binary(apr_pool_t * p, const unsigned char *src,
apr_ssize_t slen, int flags, apr_size_t * len)__attribute__((nonnull(1)));
/**
* Convert base64 or base64url with or without padding to text data.
* @param dest The destination string, can be NULL to output in \c len the
* needed buffer length for decoding.
* @param src The base64 string, can be NULL if \c dest is NULL and \c slen
* is positive or nul.
* @param slen The length of the base64 string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, attempt to decode the full base64 string,
* and return NULL if any bad character is detected. If APR_ENCODE_RELAXED,
* decode until the first non base64/base64url character.
* @param len If not NULL, outputs the length of the buffer needed for decoding
* (including the trailing NUL) if \c dest is NULL, or the actual length of
* the decoding (excluding the trailing NUL) if \c dest is not NULL.
* @return APR_SUCCESS, or APR_EINVAL if \c slen is not APR_ENCODE_STRING and
* negative, or APR_NOTFOUND if \c dest is not NULL and \c src is NULL, or
* APR_ENOSPC if \c dest is NULL and the source length (based on \c slen or
* APR_ENCODE_STRING) is too big to decode, or APR_EINCOMPLETE if the source
* length (based on \c slen or APR_ENCODE_STRING) is invalid for a base64
* encoding, or APR_BADCH if a non base64 character is present and
* APR_ENCODE_RELAXED is not specified.
*/
APR_DECLARE(apr_status_t) apr_decode_base64(char *dest, const char *src,
apr_ssize_t slen, int flags, apr_size_t * len);
/**
* Convert base64 or base64url with or without padding to binary data.
* @param dest The destination string, can be NULL to output in \c len the
* needed buffer length for decoding.
* @param src The base64 string, can be NULL if \c dest is NULL and \c slen
* is positive or nul.
* @param slen The length of the base64 string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, attempt to decode the full base64 string,
* and return NULL if any bad character is detected. If APR_ENCODE_RELAXED,
* decode until the first non base64/base64url character.
* @param len If not NULL, outputs the length of the buffer needed for decoding
* (including the trailing NUL) if \c dest is NULL, or the actual length of
* the decoding (excluding the trailing NUL) if \c dest is not NULL.
* @return APR_SUCCESS, or APR_EINVAL if \c slen is not APR_ENCODE_STRING and
* negative, or APR_NOTFOUND if \c dest is not NULL and \c src is NULL, or
* APR_ENOSPC if \c dest is NULL and the source length (based on \c slen or
* APR_ENCODE_STRING) is too big to decode, or APR_EINCOMPLETE if the source
* length (based on \c slen or APR_ENCODE_STRING) is invalid for a base64
* encoding, or APR_BADCH if a non base64 character is present and
* APR_ENCODE_RELAXED is not specified.
*/
APR_DECLARE(apr_status_t) apr_decode_base64_binary(unsigned char *dest,
const char *src, apr_ssize_t slen, int flags, apr_size_t * len);
/**
* Convert base64 or base64url with or without padding to text data, and
* return the results from a pool.
* @param p Pool to allocate from.
* @param src The base64 string to decode.
* @param slen The length of the original string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, attempt to decode the full original buffer,
* and return NULL if any bad character is detected. If APR_ENCODE_RELAXED,
* decode until the first non base64/base64url character.
* @param len If not NULL, outputs the length of the decoding (excluding the
* trailing NUL).
* @return A NUL terminated string allocated from the pool on success,
* or NULL if src is NULL or allocation failed or the decoding is not
* possible (see apr_decode_base64_binary errors).
*/
APR_DECLARE(const char *)apr_pdecode_base64(apr_pool_t * p, const char *src,
apr_ssize_t slen, int flags, apr_size_t * len)
__attribute__((nonnull(1)));
/**
* Convert base64 or base64url with or without padding to binary data, and
* return the results from a pool.
* @param p Pool to allocate from.
* @param src The base64 string to decode.
* @param slen The length of the original string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, attempt to decode the full original buffer,
* and return NULL if any bad character is detected. If APR_ENCODE_RELAXED,
* decode until the first non base64/base64url character.
* @param len If not NULL, outputs the length of the decoding (excluding the
* trailing NUL).
* @return A NUL terminated string allocated from the pool on success,
* or NULL if src is NULL or allocation failed or the decoding is not
* possible (see apr_decode_base64_binary errors).
*/
APR_DECLARE(const unsigned char *)apr_pdecode_base64_binary(apr_pool_t * p,
const char *src, apr_ssize_t slen, int flags, apr_size_t * len)
__attribute__((nonnull(1)));
/**
* Convert text data to base32.
* @param dest The destination string, can be NULL to output in \c len the
* needed buffer length for encoding.
* @param src The original string, can be NULL if \c dest is NULL and \c slen
* is positive or nul.
* @param slen The length of the original string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, emit RFC4648 Base 32 Encoding. If
* APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_BASE32HEX,
* use RFC4648 base32hex Encoding.
* @param len If not NULL, outputs the length of the buffer needed for encoding
* (including the trailing NUL) if \c dest is NULL, or the actual length of
* the encoding (excluding the trailing NUL) if \c dest is not NULL.
* @return APR_SUCCESS, or APR_EINVAL if \c slen is not APR_ENCODE_STRING and
* negative, or APR_NOTFOUND if \c dest is not NULL and \c src is NULL, or
* APR_ENOSPC if \c dest is NULL and the source length (based on \c slen or
* APR_ENCODE_STRING) is too big to encode.
*/
APR_DECLARE(apr_status_t) apr_encode_base32(char *dest, const char *src,
apr_ssize_t slen, int flags, apr_size_t * len);
/**
* Convert binary data to base32.
* @param dest The destination string, can be NULL to output in \c len the
* needed buffer length for encoding.
* @param src The original buffer, can be NULL if \c dest is NULL.
* @param slen The length of the original buffer.
* @param flags If APR_ENCODE_NONE, emit RFC4648 Base 32 Encoding. If
* APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_BASE32HEX,
* use RFC4648 base32hex Encoding.
* @param len If not NULL, outputs the length of the buffer needed for encoding
* (including the trailing NUL) if \c dest is NULL, or the actual length of
* the encoding (excluding the trailing NUL) if \c dest is not NULL.
* @return APR_SUCCESS, or APR_EINVAL if \c slen is negative, or APR_NOTFOUND
* if \c dest is not NULL and \c src is NULL, or APR_ENOSPC if \c dest is NULL
* and the source length (based on \c slen or APR_ENCODE_STRING) is too big to
* encode.
*/
APR_DECLARE(apr_status_t) apr_encode_base32_binary(char *dest, const unsigned char *src,
apr_ssize_t slen, int flags, apr_size_t * len);
/**
* Convert text data to base32, and return the results from a pool.
* @param p Pool to allocate from.
* @param src The original string.
* @param slen The length of the original string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, emit RFC4648 Base 32 Encoding. If
* APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_BASE32HEX,
* use RFC4648 base32hex Encoding.
* @param len If not NULL, outputs the length of the encoding (excluding the
* trailing NUL).
* @return A NUL terminated string allocated from the pool on success,
* or NULL if src is NULL or allocation failed or the encoding is not
* possible (see apr_encode_base32 errors).
*/
APR_DECLARE(const char *)apr_pencode_base32(apr_pool_t * p, const char *src,
apr_ssize_t slen, int flags, apr_size_t * len)
__attribute__((nonnull(1)));
/**
* Convert binary data to base32, and return the results from a pool.
* @param p Pool to allocate from.
* @param src The original buffer.
* @param slen The length of the original buffer.
* @param flags If APR_ENCODE_NONE, emit RFC4648 Base 32 Encoding. If
* APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_BASE32HEX,
* use RFC4648 base32hex Encoding.
* @param len If not NULL, outputs the length of the encoding (excluding the
* trailing NUL).
* @return A NUL terminated string allocated from the pool on success,
* or NULL if src is NULL or allocation failed or the encoding is not
* possible (see apr_encode_base32_binary errors).
*/
APR_DECLARE(const char *)apr_pencode_base32_binary(apr_pool_t * p, const unsigned char *src,
apr_ssize_t slen, int flags, apr_size_t * len)
__attribute__((nonnull(1)));
/**
* Convert base32 or base32hex with or without padding to text data.
* @param dest The destination string, can be NULL to output in \c len the
* needed buffer length for decoding.
* @param src The base32 string, can be NULL if \c dest is NULL and \c slen
* is positive or nul.
* @param slen The length of the base32 string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, parse RFC4648 Base 32 Encoding. If
* APR_ENCODE_BASE32HEX, use RFC4648 base32hex Encoding.
* @param len If not NULL, outputs the length of the buffer needed for decoding
* (including the trailing NUL) if \c dest is NULL, or the actual length of
* the decoding (excluding the trailing NUL) if \c dest is not NULL.
* @return APR_SUCCESS, or APR_EINVAL if \c slen is not APR_ENCODE_STRING and
* negative, or APR_NOTFOUND if \c dest is not NULL and \c src is NULL, or
* APR_ENOSPC if \c dest is NULL and the source length (based on \c slen or
* APR_ENCODE_STRING) is too big to decode, or APR_EINCOMPLETE if the source
* length (based on \c slen or APR_ENCODE_STRING) is invalid for a base32
* encoding, or APR_BADCH if a non base32 character is present and
* APR_ENCODE_RELAXED is not specified.
*/
APR_DECLARE(apr_status_t) apr_decode_base32(char *dest, const char *src,
apr_ssize_t slen, int flags, apr_size_t * len);
/**
* Convert base32 or base32hex with or without padding to binary data.
* @param dest The destination string, can be NULL to output in \c len the
* needed buffer length for decoding.
* @param src The base32 string, can be NULL if \c dest is NULL and \c slen
* is positive or nul.
* @param slen The length of the base32 string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, parse RFC4648 Base 32 Encoding. If
* APR_ENCODE_BASE32HEX, use RFC4648 base32hex Encoding.
* @param len If not NULL, outputs the length of the buffer needed for decoding
* (including the trailing NUL) if \c dest is NULL, or the actual length of
* the decoding (excluding the trailing NUL) if \c dest is not NULL.
* @return APR_SUCCESS, or APR_EINVAL if \c slen is not APR_ENCODE_STRING and
* negative, or APR_NOTFOUND if \c dest is not NULL and \c src is NULL, or
* APR_ENOSPC if \c dest is NULL and the source length (based on \c slen or
* APR_ENCODE_STRING) is too big to decode, or APR_EINCOMPLETE if the source
* length (based on \c slen or APR_ENCODE_STRING) is invalid for a base32
* encoding, or APR_BADCH if a non base32 character is present and
* APR_ENCODE_RELAXED is not specified.
*/
APR_DECLARE(apr_status_t) apr_decode_base32_binary(unsigned char *dest,
const char *src, apr_ssize_t slen, int flags, apr_size_t * len);
/**
* Convert base32 or base32hex with or without padding to text data, and
* return the results from a pool.
* @param p Pool to allocate from.
* @param src The base32 string to decode.
* @param slen The length of the original string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, parse RFC4648 Base 32 Encoding. If
* APR_ENCODE_BASE32HEX, use RFC4648 base32hex Encoding.
* @param len If not NULL, outputs the length of the encoding (excluding the
* trailing NUL).
* @return A NUL terminated string allocated from the pool on success,
* or NULL if src is NULL or allocation failed or the decoding is not
* possible (see apr_decode_base32 errors).
*/
APR_DECLARE(const char *)apr_pdecode_base32(apr_pool_t * p, const char *src,
apr_ssize_t slen, int flags, apr_size_t * len)
__attribute__((nonnull(1)));
/**
* Convert base32 or base32hex with or without padding to binary data, and
* return the results from a pool.
* @param p Pool to allocate from.
* @param src The base32 string to decode.
* @param slen The length of the original string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, parse RFC4648 Base 32 Encoding. If
* APR_ENCODE_BASE32HEX, use RFC4648 base32hex Encoding.
* @param len If not NULL, outputs the length of the encoding (excluding the
* trailing NUL).
* @return A NUL terminated string allocated from the pool on success,
* or NULL if src is NULL or allocation failed or the decoding is not
* possible (see apr_decode_base32_binary errors).
*/
APR_DECLARE(const unsigned char *)apr_pdecode_base32_binary(apr_pool_t * p,
const char *src, apr_ssize_t slen, int flags, apr_size_t * len)
__attribute__((nonnull(1)));
/**
* Convert text data to base16 (hex).
* @param dest The destination string, can be NULL to output in \c len the
* needed buffer length for encoding.
* @param src The original string, can be NULL if \c dest is NULL and \c slen
* is positive or nul.
* @param slen The length of the original string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, emit RFC4648 Base 16 Encoding. If
* APR_ENCODE_COLON, separate each token with a colon.
* @param len If not NULL, outputs the length of the buffer needed for encoding
* (including the trailing NUL) if \c dest is NULL, or the actual length of
* the encoding (excluding the trailing NUL) if \c dest is not NULL.
* @return APR_SUCCESS, or APR_EINVAL if \c slen is not APR_ENCODE_STRING and
* negative, or APR_NOTFOUND if \c dest is not NULL and \c src is NULL, or
* APR_ENOSPC if \c dest is NULL and the source length (based on \c slen or
* APR_ENCODE_STRING) is too big to encode.
*/
APR_DECLARE(apr_status_t) apr_encode_base16(char *dest, const char *src,
apr_ssize_t slen, int flags, apr_size_t * len);
/**
* Convert binary data to base16 (hex).
* @param dest The destination string, can be NULL to output in \c len the
* needed buffer length for encoding.
* @param src The original buffer, can be NULL if \c dest is NULL.
* @param slen The length of the original buffer.
* @param flags If APR_ENCODE_NONE, emit RFC4648 Base 16 Encoding. If
* APR_ENCODE_COLON, separate each token with a colon.
* @param len If not NULL, outputs the length of the buffer needed for encoding
* (including the trailing NUL) if \c dest is NULL, or the actual length of
* the encoding (excluding the trailing NUL) if \c dest is not NULL.
* @return APR_SUCCESS, or APR_EINVAL if \c slen is negative, or APR_NOTFOUND
* if \c dest is not NULL and \c src is NULL, or APR_ENOSPC if \c dest is NULL
* and the source length (based on \c slen or APR_ENCODE_STRING) is too big to
* encode.
*/
APR_DECLARE(apr_status_t) apr_encode_base16_binary(char *dest,
const unsigned char *src, apr_ssize_t slen, int flags,
apr_size_t * len);
/**
* Convert text data to base16 (hex), and return the results from a
* pool.
* @param p Pool to allocate from.
* @param src The original string.
* @param slen The length of the original string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, emit RFC4648 Base 16 Encoding. If
* APR_ENCODE_COLON, separate each token with a colon.
* @param len If not NULL, outputs the length of the encoding (excluding the
* trailing NUL).
* @return A NUL terminated string allocated from the pool on success,
* or NULL if src is NULL or allocation failed or the encoding is not
* possible (see apr_encode_base16 errors).
*/
APR_DECLARE(const char *)apr_pencode_base16(apr_pool_t * p, const char *src,
apr_ssize_t slen, int flags, apr_size_t * len)
__attribute__((nonnull(1)));
/**
* Convert binary data to base16 (hex), and return the results from a
* pool.
* @param p Pool to allocate from.
* @param src The original buffer.
* @param slen The length of the original buffer.
* @param flags If APR_ENCODE_NONE, emit RFC4648 Base 16 Encoding. If
* APR_ENCODE_COLON, separate each token with a colon.
* @param len If not NULL, outputs the length of the encoding (excluding the
* trailing NUL).
* @return A NUL terminated string allocated from the pool on success,
* or NULL if src is NULL or allocation failed or the encoding is not
* possible (see apr_encode_base16_binary errors).
*/
APR_DECLARE(const char *)apr_pencode_base16_binary(apr_pool_t * p,
const unsigned char *src, apr_ssize_t slen,
int flags, apr_size_t * len)__attribute__((nonnull(1)));
/**
* Convert base16 (hex) to text data.
* @param dest The destination string, can be NULL to output in \c len the
* needed buffer length for decoding.
* @param src The base16 string, can be NULL if \c dest is NULL and \c slen
* is positive or nul.
* @param slen The length of the base16 string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, parse RFC4648 Base 16 Encoding. If
* APR_ENCODE_COLON, allow tokens to be separated with a colon.
* @param len If not NULL, outputs the length of the buffer needed for decoding
* (including the trailing NUL) if \c dest is NULL, or the actual length of
* the decoding (excluding the trailing NUL) if \c dest is not NULL.
* @return APR_SUCCESS, or APR_EINVAL if \c slen is not APR_ENCODE_STRING and
* negative, or APR_NOTFOUND if \c dest is not NULL and \c src is NULL, or
* APR_ENOSPC if \c dest is NULL and the source length (based on \c slen or
* APR_ENCODE_STRING) is too big to decode, or APR_EINCOMPLETE if the source
* length (based on \c slen or APR_ENCODE_STRING) is invalid for a base16
* encoding, or APR_BADCH if a non base16 character is present and
* APR_ENCODE_RELAXED is not specified.
*/
APR_DECLARE(apr_status_t) apr_decode_base16(char *dest, const char *src,
apr_ssize_t slen, int flags, apr_size_t * len);
/**
* Convert base16 (hex) to binary data.
* @param dest The destination string, can be NULL to output in \c len the
* needed buffer length for decoding.
* @param src The base16 string, can be NULL if \c dest is NULL and \c slen
* is positive or nul.
* @param slen The length of the base16 string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, parse RFC4648 Base 16 Encoding. If
* APR_ENCODE_COLON, allow tokens to be separated with a colon.
* @param len If not NULL, outputs the length of the buffer needed for decoding
* (including the trailing NUL) if \c dest is NULL, or the actual length of
* the decoding (excluding the trailing NUL) if \c dest is not NULL.
* @return APR_SUCCESS, or APR_EINVAL if \c slen is not APR_ENCODE_STRING and
* negative, or APR_NOTFOUND if \c dest is not NULL and \c src is NULL, or
* APR_ENOSPC if \c dest is NULL and the source length (based on \c slen or
* APR_ENCODE_STRING) is too big to decode, or APR_EINCOMPLETE if the source
* length (based on \c slen or APR_ENCODE_STRING) is invalid for a base16
* encoding, or APR_BADCH if a non base16 character is present and
* APR_ENCODE_RELAXED is not specified.
*/
APR_DECLARE(apr_status_t) apr_decode_base16_binary(unsigned char *dest,
const char *src, apr_ssize_t slen, int flags, apr_size_t * len);
/**
* Convert base16 (hex) and return the results from a pool.
* @param p Pool to allocate from.
* @param src The base16 string to decode.
* @param slen The length of the original string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, parse RFC4648 Base 16 Encoding. If
* APR_ENCODE_COLON, allow tokens to be separated with a colon.
* @param len If not NULL, outputs the length of the encoding (excluding the
* trailing NUL).
* @return A NUL terminated string allocated from the pool on success,
* or NULL if src is NULL or allocation failed or the decoding is not
* possible (see apr_decode_base16 errors).
*/
APR_DECLARE(const char *)apr_pdecode_base16(apr_pool_t * p, const char *src,
apr_ssize_t slen, int flags, apr_size_t * len)
__attribute__((nonnull(1)));
/**
* Convert base16 (hex) to binary data, and return the results from a pool.
* @param p Pool to allocate from.
* @param src The base16 string to decode.
* @param slen The length of the original string, or APR_ENCODE_STRING if
* the actual length should be computed based on NUL termination.
* @param flags If APR_ENCODE_NONE, parse RFC4648 Base 16 Encoding. If
* APR_ENCODE_COLON, allow tokens to be separated with a colon.
* @param len If not NULL, outputs the length of the encoding (excluding the
* trailing NUL).
* @return A NUL terminated string allocated from the pool on success,
* or NULL if src is NULL or allocation failed or the decoding is not
* possible (see apr_decode_base16_binary errors).
*/
APR_DECLARE(const unsigned char *)apr_pdecode_base16_binary(apr_pool_t * p,
const char *src, apr_ssize_t slen, int flags, apr_size_t * len)
__attribute__((nonnull(1)));
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* !APR_ENCODE_H */