1/* Licensed to the Apache Software Foundation (ASF) under one or more 2 * contributor license agreements. See the NOTICE file distributed with 3 * this work for additional information regarding copyright ownership. 4 * The ASF licenses this file to You under the Apache License, Version 2.0 5 * (the "License"); you may not use this file except in compliance with 6 * the License. You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17/** 18 * @file apr_encode.h 19 * @brief APR-UTIL Encoding 20 */ 21#ifndef APR_ENCODE_H 22#define APR_ENCODE_H 23 24#include "apr.h" 25#include "apr_general.h" 26 27#ifdef __cplusplus 28extern "C" { 29#endif 30 31/** 32 * @defgroup APR_Util_Encode Base64/Base64Url/Base32/Base32Hex/Base16 Encoding 33 * @ingroup APR_Util 34 * @{ 35 */ 36 37/** 38 * RFC4648 and RFC7515 compliant BASE64, BASE64URL, BASE32, BASE32HEX 39 * and BASE16 encode/decode functions. 40 * 41 * The following encodings are supported: 42 * 43 * - Base 64 Encoding 44 * 45 * o Use flag APR_ENCODE_NONE 46 * o https://tools.ietf.org/html/rfc4648#section-4 47 * 48 * - Base 64 Encoding with URL and Filename Safe Alphabet 49 * 50 * o Use flag APR_ENCODE_URL 51 * o https://tools.ietf.org/html/rfc4648#section-5 52 * 53 * - Base 64 URL Encoding without Padding 54 * 55 * o Use flag APR_ENCODE_BASE64URL 56 * o https://tools.ietf.org/html/rfc7515#appendix-C 57 * 58 * - Base 32 Encoding 59 * 60 * o Use flag APR_ENCODE_NONE 61 * o https://tools.ietf.org/html/rfc4648#section-6 62 * 63 * - Base 32 Encoding with Extended Hex Alphabet 64 * 65 * o Use flag APR_ENCODE_BASE32HEX 66 * o https://tools.ietf.org/html/rfc4648#section-7 67 * 68 * - Base 16 Encoding 69 * 70 * o Use flags APR_ENCODE_NONE/APR_ENCODE_COLON 71 * o https://tools.ietf.org/html/rfc4648#section-8 72 * 73 * If a non valid character of any kind including whitespace is passed to any 74 * of the decoder functions, APR_BADCH will be returned. In this case decoding 75 * will still take place, but the results can not be trusted. 76 * 77 * If APR_ENCODE_RELAXED is passed to the decoder functions, decoding will be 78 * attempted up until the first non valid character. If this results in an 79 * invalid state in the decoder, such as but not limited to an odd number of 80 * base16 characters, APR_BADCH will still be returned. 81 * 82 * If APR_ENCODE_RELAXED is not passed to a decoder function, the decoding will 83 * be done in constant time regardless of whether the result returns APR_SUCCESS 84 * or APR_BADCH. 85 * 86 * If the dest parameter is NULL, the maximum theoretical buffer size is 87 * returned in the len field, including space for a terminating zero character 88 * if the destination is a string. This value can be used to allocate buffers 89 * of a suitable safe size. 90 * 91 * If the dest parameter is provided, the encoding or decoding will take place, 92 * and the actual number of characters written is returned in the len field, 93 * ignoring any terminating zero. 94 * 95 * Plain strings are not assumed '\0' terminated unless APR_ENCODE_STRING is 96 * provided. 97 * 98 */ 99 100/** 101 * When passing a string to one of the encode functions, this value can be 102 * passed to indicate a string-valued key, and have the length computed 103 * automatically. 104 */ 105#define APR_ENCODE_STRING (-1) 106 107/** 108 * Generate RFC4648 base16/base32/base64. 109 */ 110#define APR_ENCODE_NONE 0 111 112/** 113 * If relaxed, decode up until the first non base16/base32/base64 character. 114 */ 115#define APR_ENCODE_RELAXED 1 116 117/** 118 * Omit the padding character (=) while encoding. 119 */ 120#define APR_ENCODE_NOPADDING 2 121 122/** 123 * Generate RFC4648 Base 64 Encoding with URL and Filename Safe Alphabet 124 */ 125#define APR_ENCODE_URL 4 126 127/** 128 * Generate RFC7515 BASE64URL 129 */ 130#define APR_ENCODE_BASE64URL (APR_ENCODE_NOPADDING | APR_ENCODE_URL) 131 132/** 133 * Generate base32hex encoding instead of base32 encoding 134 */ 135#define APR_ENCODE_BASE32HEX 8 136 137/** 138 * Generate base16 with colons between each token. 139 */ 140#define APR_ENCODE_COLON 16 141 142/** 143 * Generate base16 with lower case characters. 144 */ 145#define APR_ENCODE_LOWER 32 146 147/** 148 * Convert text data to base64. 149 * @param dest The destination string, can be NULL. 150 * @param src The original string. 151 * @param slen The length of the original string, or APR_ENCODE_STRING if 152 * NUL terminated. 153 * @param flags If APR_ENCODE_NONE, emit RFC4648 Base 64 Encoding. If 154 * APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_URL, 155 * use RFC4648 Base 64 Encoding with URL and Filename Safe Alphabet. 156 * If APR_ENCODE_BASE64URL, use RFC7515 base64url Encoding. 157 * @param len If present and src is NULL, returns the maximum possible length 158 * of the destination string, including a zero pad. If present and src is 159 * not NULL, returns the number of characters actually written. 160 * @return APR_SUCCESS, or APR_NOTFOUND if the string was NULL. 161 */ 162APR_DECLARE(apr_status_t) apr_encode_base64(char *dest, const char *src, 163 apr_ssize_t slen, int flags, apr_size_t * len); 164 165/** 166 * Convert binary data to base64. 167 * @param dest The destination string, can be NULL. 168 * @param src The original buffer. 169 * @param slen The length of the original buffer. 170 * @param flags If APR_ENCODE_NONE, emit RFC4648 Base 64 Encoding. If 171 * APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_URL, 172 * use RFC4648 Base 64 Encoding with URL and Filename Safe Alphabet. 173 * If APR_ENCODE_BASE64URL, use RFC7515 base64url Encoding. 174 * @param len If present and src is NULL, returns the maximum possible length 175 * of the destination string, including a zero pad. If present and src is 176 * not NULL, returns the number of characters actually written. 177 * @return APR_SUCCESS, or APR_NOTFOUND if the string was NULL. 178 */ 179APR_DECLARE(apr_status_t) apr_encode_base64_binary(char *dest, const unsigned char *src, 180 apr_ssize_t slen, int flags, apr_size_t * len); 181 182/** 183 * Convert text data to base64, and return the results from a pool. 184 * @param p Pool to allocate from. 185 * @param src The original string. 186 * @param slen The length of the original string, or APR_ENCODE_STRING if 187 * NUL terminated. 188 * @param flags If APR_ENCODE_NONE, emit RFC4648 Base 64 Encoding. If 189 * APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_URL, 190 * use RFC4648 Base 64 Encoding with URL and Filename Safe Alphabet. 191 * If APR_ENCODE_BASE64URL, use RFC7515 base64url Encoding. 192 * @param len If present, returns the number of characters written excluding 193 * the zero pad. 194 * @return A zero padded string allocated from the pool on success, or 195 * NULL if src was NULL. 196 */ 197APR_DECLARE(const char *)apr_pencode_base64(apr_pool_t * p, const char *src, 198 apr_ssize_t slen, int flags, apr_size_t * len)__attribute__((nonnull(1))); 199 200/** 201 * Convert binary data to base64, and return the results from a pool. 202 * @param p Pool to allocate from. 203 * @param src The original buffer. 204 * @param slen The length of the original buffer. 205 * @param flags If APR_ENCODE_NONE, emit RFC4648 Base 64 Encoding. If 206 * APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_URL, 207 * use RFC4648 Base 64 Encoding with URL and Filename Safe Alphabet. 208 * If APR_ENCODE_BASE64URL, use RFC7515 base64url Encoding. 209 * @param len If present, returns the number of characters written excluding 210 * the zero pad. 211 * @return A zero padded string allocated from the pool on success, or 212 * NULL if src was NULL. 213 */ 214APR_DECLARE(const char *)apr_pencode_base64_binary(apr_pool_t * p, const unsigned char *src, 215 apr_ssize_t slen, int flags, apr_size_t * len)__attribute__((nonnull(1))); 216 217/** 218 * Convert base64 or base64url with or without padding to text data. 219 * @param dest The destination string, can be NULL. 220 * @param src The original string. 221 * @param slen The length of the original string, or APR_ENCODE_STRING if 222 * NUL terminated. 223 * @param flags If APR_ENCODE_NONE, attempt to decode the full original buffer, 224 * and return NULL if any bad character is detected. If APR_ENCODE_RELAXED, 225 * decode until the first non base64/base64url character. 226 * @param len If present and src is NULL, returns the maximum possible length 227 * of the destination string, including a zero pad. If present and src is 228 * not NULL, returns the number of characters actually written. 229 * @return APR_SUCCESS, or APR_NOTFOUND if the string was NULL, or APR_BADCH 230 * if a non hex character is present. 231 */ 232APR_DECLARE(apr_status_t) apr_decode_base64(char *dest, const char *src, 233 apr_ssize_t slen, int flags, apr_size_t * len); 234 235/** 236 * Convert base64 or base64url with or without padding to binary data. 237 * @param dest The destination buffer, can be NULL. 238 * @param src The original string. 239 * @param slen The length of the original string, or APR_ENCODE_STRING if 240 * NUL terminated. 241 * @param flags If APR_ENCODE_NONE, attempt to decode the full original buffer, 242 * and return NULL if any bad character is detected. If APR_ENCODE_RELAXED, 243 * decode until the first non base64/base64url character. 244 * @param len If present and src is NULL, returns the maximum possible length 245 * of the destination buffer, including a zero pad. If present and src is 246 * not NULL, returns the number of characters actually written. 247 * @return APR_SUCCESS, or APR_NOTFOUND if the src was NULL, or APR_BADCH 248 * if a non base64 character is present. 249 */ 250APR_DECLARE(apr_status_t) apr_decode_base64_binary(unsigned char *dest, 251 const char *src, apr_ssize_t slen, int flags, apr_size_t * len); 252 253/** 254 * Convert base64 or base64url with or without padding to text data, and 255 * return the results from a pool. 256 * @param p Pool to allocate from. 257 * @param src The base64 string to decode. 258 * @param slen The length of the base64 string, or APR_ENCODE_STRING if 259 * NUL terminated. 260 * @param flags If APR_ENCODE_NONE, attempt to decode the full original buffer, 261 * and return NULL if any bad character is detected. If APR_ENCODE_RELAXED, 262 * decode until the first non base64/base64url character. 263 * @param len If present, returns the number of characters written, excluding 264 * the zero padding. 265 * @return A string allocated from the pool containing the result with a zero 266 * pad. If src was NULL, or an error occurred, NULL is returned. 267 */ 268APR_DECLARE(const char *)apr_pdecode_base64(apr_pool_t * p, const char *src, 269 apr_ssize_t slen, int flags, apr_size_t * len) 270 __attribute__((nonnull(1))); 271 272/** 273 * Convert base64 or base64url with or without padding to binary data, and 274 * return the results from a pool. 275 * @param p Pool to allocate from. 276 * @param src The original string. 277 * @param slen The length of the original string, or APR_ENCODE_STRING if 278 * NUL terminated. 279 * @param flags If APR_ENCODE_NONE, attempt to decode the full original buffer, 280 * and return NULL if any bad character is detected. If APR_ENCODE_RELAXED, 281 * decode until the first non base64/base64url character. 282 * @param len If present, returns the number of characters written, excluding 283 * the zero padding. 284 * @return A buffer allocated from the pool containing the result with a zero 285 * pad. If src was NULL, or an error occurred, NULL is returned. 286 */ 287APR_DECLARE(const unsigned char *)apr_pdecode_base64_binary(apr_pool_t * p, 288 const char *src, apr_ssize_t slen, int flags, apr_size_t * len) 289 __attribute__((nonnull(1))); 290 291/** 292 * Convert text data to base32. 293 * @param dest The destination string, can be NULL. 294 * @param src The original string. 295 * @param slen The length of the original string, or APR_ENCODE_STRING if 296 * NUL terminated. 297 * @param flags If APR_ENCODE_NONE, emit RFC4648 Base 32 Encoding. If 298 * APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_BASE32HEX, 299 * use RFC4648 base32hex Encoding. 300 * @param len If present and src is NULL, returns the maximum possible length 301 * of the destination string, including a zero pad. If present and src is 302 * not NULL, returns the number of characters actually written. 303 * @return APR_SUCCESS, or APR_NOTFOUND if the string was NULL. 304 */ 305APR_DECLARE(apr_status_t) apr_encode_base32(char *dest, const char *src, 306 apr_ssize_t slen, int flags, apr_size_t * len); 307 308/** 309 * Convert binary data to base32. 310 * @param dest The destination string, can be NULL. 311 * @param src The original buffer. 312 * @param slen The length of the original buffer. 313 * @param flags If APR_ENCODE_NONE, emit RFC4648 Base 32 Encoding. If 314 * APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_BASE32HEX, 315 * use RFC4648 base32hex Encoding. 316 * @param len If present and src is NULL, returns the maximum possible length 317 * of the destination string, including a zero pad. If present and src is 318 * not NULL, returns the number of characters actually written. 319 * @return APR_SUCCESS, or APR_NOTFOUND if the string was NULL. 320 */ 321APR_DECLARE(apr_status_t) apr_encode_base32_binary(char *dest, const unsigned char *src, 322 apr_ssize_t slen, int flags, apr_size_t * len); 323 324/** 325 * Convert text data to base32, and return the results from a pool. 326 * @param p Pool to allocate from. 327 * @param src The original string. 328 * @param slen The length of the original string, or APR_ENCODE_STRING if 329 * NUL terminated. 330 * @param flags If APR_ENCODE_NONE, emit RFC4648 Base 32 Encoding. If 331 * APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_BASE32HEX, 332 * use RFC4648 base32hex Encoding. 333 * @param len If present, returns the number of characters written excluding 334 * the zero pad. 335 * @return A zero padded string allocated from the pool on success, or 336 * NULL if src was NULL. 337 */ 338APR_DECLARE(const char *)apr_pencode_base32(apr_pool_t * p, const char *src, 339 apr_ssize_t slen, int flags, apr_size_t * len) 340 __attribute__((nonnull(1))); 341 342/** 343 * Convert binary data to base32, and return the results from a pool. 344 * @param p Pool to allocate from. 345 * @param src The original buffer. 346 * @param slen The length of the original buffer. 347 * @param flags If APR_ENCODE_NONE, emit RFC4648 Base 32 Encoding. If 348 * APR_ENCODE_NOPADDING, omit the = padding character. If APR_ENCODE_BASE32HEX, 349 * use RFC7515 base32hex Encoding. 350 * @param len If present, returns the number of characters written excluding 351 * the zero pad. 352 * @return A zero padded string allocated from the pool on success, or 353 * NULL if src was NULL. 354 */ 355APR_DECLARE(const char *)apr_pencode_base32_binary(apr_pool_t * p, const unsigned char *src, 356 apr_ssize_t slen, int flags, apr_size_t * len) 357 __attribute__((nonnull(1))); 358 359/** 360 * Convert base32 or base32hex with or without padding to text data. 361 * @param dest The destination string, can be NULL. 362 * @param src The original string. 363 * @param slen The length of the original string, or APR_ENCODE_STRING if 364 * NUL terminated. 365 * @param flags If APR_ENCODE_NONE, parse RFC4648 Base 32 Encoding. If 366 * APR_ENCODE_BASE32HEX, use RFC4648 base32hex Encoding. 367 * @param len If present and src is NULL, returns the maximum possible length 368 * of the destination buffer, including a zero pad. If present and src is 369 * not NULL, returns the number of characters actually written. 370 * @return APR_SUCCESS, or APR_NOTFOUND if the string was NULL, or APR_BADCH 371 * if a non base32 character is present. 372 */ 373APR_DECLARE(apr_status_t) apr_decode_base32(char *dest, const char *src, 374 apr_ssize_t slen, int flags, apr_size_t * len); 375 376/** 377 * Convert base32 or base32hex with or without padding to binary data. 378 * @param dest The destination buffer, can be NULL. 379 * @param src The original string. 380 * @param slen The length of the original string, or APR_ENCODE_STRING if 381 * NUL terminated. 382 * @param flags If APR_ENCODE_NONE, parse RFC4648 Base 32 Encoding. If 383 * APR_ENCODE_BASE32HEX, use RFC4648 base32hex Encoding. 384 * @param len If present and src is NULL, returns the maximum possible length 385 * of the destination buffer, including a zero pad. If present and src is 386 * not NULL, returns the number of characters actually written. 387 * @return APR_SUCCESS, or APR_NOTFOUND if the src was NULL, or APR_BADCH 388 * if a non base32 character is present. 389 */ 390APR_DECLARE(apr_status_t) apr_decode_base32_binary(unsigned char *dest, 391 const char *src, apr_ssize_t slen, int flags, apr_size_t * len); 392 393/** 394 * Convert base32 or base32hex with or without padding to text data, and 395 * return the results from a pool. 396 * @param p Pool to allocate from. 397 * @param src The base32 string to decode. 398 * @param slen The length of the base32 string, or APR_ENCODE_STRING if 399 * NUL terminated. 400 * @param flags If APR_ENCODE_NONE, parse RFC4648 Base 32 Encoding. If 401 * APR_ENCODE_BASE32HEX, use RFC4648 base32hex Encoding. 402 * @param len If present, returns the number of characters written, excluding 403 * the zero padding. 404 * @return A string allocated from the pool containing the result with a zero 405 * pad. If src was NULL, or an error occurred, NULL is returned. 406 */ 407APR_DECLARE(const char *)apr_pdecode_base32(apr_pool_t * p, const char *src, 408 apr_ssize_t slen, int flags, apr_size_t * len) 409 __attribute__((nonnull(1))); 410 411/** 412 * Convert base32 or base32hex with or without padding to binary data, and 413 * return the results from a pool. 414 * @param p Pool to allocate from. 415 * @param src The original string. 416 * @param slen The length of the original string, or APR_ENCODE_STRING if 417 * NUL terminated. 418 * @param flags If APR_ENCODE_NONE, parse RFC4648 Base 32 Encoding. If 419 * APR_ENCODE_BASE32HEX, use RFC4648 base32hex Encoding. 420 * @param len If present, returns the number of characters written, excluding 421 * the zero padding. 422 * @return A buffer allocated from the pool containing the result with a zero 423 * pad. If src was NULL, or an error occurred, NULL is returned. 424 */ 425APR_DECLARE(const unsigned char *)apr_pdecode_base32_binary(apr_pool_t * p, 426 const char *src, apr_ssize_t slen, int flags, apr_size_t * len) 427 __attribute__((nonnull(1))); 428 429/** 430 * Convert text data to base16 (hex). 431 * @param dest The destination string, can be NULL. 432 * @param src The original string. 433 * @param slen The length of the original string, or APR_ENCODE_STRING if 434 * NUL terminated. 435 * @param flags If APR_ENCODE_NONE, emit RFC4648 Base 16 Encoding. If 436 * APR_ENCODE_COLON, separate each token with a colon. 437 * @param len If present and src is NULL, returns the maximum possible length 438 * of the destination buffer, including a zero pad. If present and src is 439 * not NULL, returns the number of characters actually written. 440 * @return APR_SUCCESS, or APR_NOTFOUND if the string was NULL. 441 */ 442APR_DECLARE(apr_status_t) apr_encode_base16(char *dest, const char *src, 443 apr_ssize_t slen, int flags, apr_size_t * len); 444 445/** 446 * Convert binary data to base16 (hex). 447 * @param dest The destination string, can be NULL. 448 * @param src The original buffer. 449 * @param slen The length of the original buffer. 450 * @param flags If APR_ENCODE_NONE, emit RFC4648 Base 16 Encoding. If 451 * APR_ENCODE_COLON, separate each token with a colon. 452 * @param len If present and src is NULL, returns the maximum possible length 453 * of the destination buffer, including a zero pad. If present and src is 454 * not NULL, returns the number of characters actually written. 455 * @return APR_SUCCESS, or APR_NOTFOUND if the string was NULL. 456 */ 457APR_DECLARE(apr_status_t) apr_encode_base16_binary(char *dest, 458 const unsigned char *src, apr_ssize_t slen, int flags, 459 apr_size_t * len); 460 461/** 462 * Convert text data to base16 (hex), and return the results from a 463 * pool. 464 * @param p Pool to allocate from. 465 * @param src The original string. 466 * @param slen The length of the original string, or APR_ENCODE_STRING if 467 * NUL terminated. 468 * @param flags If APR_ENCODE_NONE, emit RFC4648 Base 16 Encoding. If 469 * APR_ENCODE_COLON, separate each token with a colon. 470 * @param len If present, returns the number of characters written, excluding 471 * the zero padding. 472 * @return A string allocated from the pool containing the result with a zero 473 * pad. If src was NULL, or an error occurred, NULL is returned. 474 */ 475APR_DECLARE(const char *)apr_pencode_base16(apr_pool_t * p, const char *src, 476 apr_ssize_t slen, int flags, apr_size_t * len) 477 __attribute__((nonnull(1))); 478 479/** 480 * Convert binary data to base16 (hex), and return the results from a 481 * pool. 482 * @param p Pool to allocate from. 483 * @param src The original buffer. 484 * @param slen The length of the original buffer. 485 * @param flags If APR_ENCODE_NONE, emit RFC4648 Base 16 Encoding. If 486 * APR_ENCODE_COLON, separate each token with a colon. 487 * @param len If present, returns the number of characters written, excluding 488 * the zero padding. 489 * @return A string allocated from the pool containing the result with a zero 490 * pad. If src was NULL, or an error occurred, NULL is returned. 491 */ 492APR_DECLARE(const char *)apr_pencode_base16_binary(apr_pool_t * p, 493 const unsigned char *src, apr_ssize_t slen, 494 int flags, apr_size_t * len)__attribute__((nonnull(1))); 495 496/** 497 * Convert base16 (hex) to text data. 498 * @param dest The destination string, can be NULL. 499 * @param src The original string. 500 * @param slen The length of the original string, or APR_ENCODE_STRING if 501 * NUL terminated. 502 * @param flags If APR_ENCODE_NONE, parse RFC4648 Base 16 Encoding. If 503 * APR_ENCODE_COLON, allow tokens to be separated with a colon. 504 * @param len If present and src is NULL, returns the maximum possible length 505 * of the destination buffer, including a zero pad. If present and src is 506 * not NULL, returns the number of characters actually written. 507 * @return APR_SUCCESS, or APR_NOTFOUND if the string was NULL, or APR_BADCH 508 * if a non hex character is present. A zero pad is appended to the buffer. 509 */ 510APR_DECLARE(apr_status_t) apr_decode_base16(char *dest, const char *src, 511 apr_ssize_t slen, int flags, apr_size_t * len); 512 513/** 514 * Convert base16 (hex) to binary data. 515 * @param dest The destination buffer, can be NULL. 516 * @param src The original string. 517 * @param slen The length of the original string, or APR_ENCODE_STRING if 518 * NUL terminated. 519 * @param flags If APR_ENCODE_NONE, parse RFC4648 Base 16 Encoding. If 520 * APR_ENCODE_COLON, allow tokens to be separated with a colon. 521 * @param len If present and src is NULL, returns the maximum possible length 522 * of the destination buffer, including a zero pad. If present and src is 523 * not NULL, returns the number of characters actually written. 524 * @return APR_SUCCESS, or APR_NOTFOUND if the string was NULL, or APR_BADCH 525 * if a non hex character is present. No zero pad is written to the buffer. 526 */ 527APR_DECLARE(apr_status_t) apr_decode_base16_binary(unsigned char *dest, 528 const char *src, apr_ssize_t slen, int flags, apr_size_t * len); 529 530/** 531 * Convert base16 (hex) and return the results from a pool. 532 * @param p Pool to allocate from. 533 * @param src The original string. 534 * @param slen The length of the original string, or APR_ENCODE_STRING if 535 * NUL terminated. 536 * @param flags If APR_ENCODE_NONE, parse RFC4648 Base 16 Encoding. If 537 * APR_ENCODE_COLON, allow tokens to be separated with a colon. 538 * @param len If present, returns the number of characters written, excluding 539 * the zero padding. 540 * @return A buffer allocated from the pool containing the result with a zero 541 * pad. If src was NULL, or an error occurred, NULL is returned. 542 */ 543APR_DECLARE(const char *)apr_pdecode_base16(apr_pool_t * p, const char *src, 544 apr_ssize_t slen, int flags, apr_size_t * len) 545 __attribute__((nonnull(1))); 546 547/** 548 * Convert base16 (hex) to binary data, and return the results from a pool. 549 * @param p Pool to allocate from. 550 * @param src The original string. 551 * @param slen The length of the original string, or APR_ENCODE_STRING if 552 * NUL terminated. 553 * @param flags If APR_ENCODE_NONE, parse RFC4648 Base 16 Encoding. If 554 * APR_ENCODE_COLON, allow tokens to be separated with a colon. 555 * @param len If present, returns the number of characters written, excluding 556 * the zero padding. 557 * @return A buffer allocated from the pool containing the result with a zero 558 * pad. If src was NULL, or an error occurred, NULL is returned. 559 */ 560APR_DECLARE(const unsigned char *)apr_pdecode_base16_binary(apr_pool_t * p, 561 const char *src, apr_ssize_t slen, int flags, apr_size_t * len) 562 __attribute__((nonnull(1))); 563 564/** @} */ 565#ifdef __cplusplus 566} 567#endif 568 569#endif /* !APR_ENCODE_H */ 570