Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <string.h> |
| 4 | #include <openssl/objects.h> |
| 5 | #include <openssl/comp.h> |
| 6 | #include <openssl/err.h> |
| 7 | |
| 8 | COMP_METHOD *COMP_zlib(void ); |
| 9 | |
| 10 | static COMP_METHOD zlib_method_nozlib={ |
| 11 | NID_undef, |
| 12 | "(undef)", |
| 13 | NULL, |
| 14 | NULL, |
| 15 | NULL, |
| 16 | NULL, |
| 17 | NULL, |
| 18 | NULL, |
| 19 | }; |
| 20 | |
| 21 | #ifndef ZLIB |
| 22 | #undef ZLIB_SHARED |
| 23 | #else |
| 24 | |
| 25 | #include <zlib.h> |
| 26 | |
| 27 | static int zlib_stateful_init(COMP_CTX *ctx); |
| 28 | static void zlib_stateful_finish(COMP_CTX *ctx); |
| 29 | static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out, |
| 30 | unsigned int olen, unsigned char *in, unsigned int ilen); |
| 31 | static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out, |
| 32 | unsigned int olen, unsigned char *in, unsigned int ilen); |
| 33 | |
| 34 | |
| 35 | /* memory allocations functions for zlib intialization */ |
| 36 | static void* zlib_zalloc(void* opaque, unsigned int no, unsigned int size) |
| 37 | { |
| 38 | void *p; |
| 39 | |
| 40 | p=OPENSSL_malloc(no*size); |
| 41 | if (p) |
| 42 | memset(p, 0, no*size); |
| 43 | return p; |
| 44 | } |
| 45 | |
| 46 | |
| 47 | static void zlib_zfree(void* opaque, void* address) |
| 48 | { |
| 49 | OPENSSL_free(address); |
| 50 | } |
| 51 | |
| 52 | #if 0 |
| 53 | static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out, |
| 54 | unsigned int olen, unsigned char *in, unsigned int ilen); |
| 55 | static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out, |
| 56 | unsigned int olen, unsigned char *in, unsigned int ilen); |
| 57 | |
| 58 | static int zz_uncompress(Bytef *dest, uLongf *destLen, const Bytef *source, |
| 59 | uLong sourceLen); |
| 60 | |
| 61 | static COMP_METHOD zlib_stateless_method={ |
| 62 | NID_zlib_compression, |
| 63 | LN_zlib_compression, |
| 64 | NULL, |
| 65 | NULL, |
| 66 | zlib_compress_block, |
| 67 | zlib_expand_block, |
| 68 | NULL, |
| 69 | NULL, |
| 70 | }; |
| 71 | #endif |
| 72 | |
| 73 | static COMP_METHOD zlib_stateful_method={ |
| 74 | NID_zlib_compression, |
| 75 | LN_zlib_compression, |
| 76 | zlib_stateful_init, |
| 77 | zlib_stateful_finish, |
| 78 | zlib_stateful_compress_block, |
| 79 | zlib_stateful_expand_block, |
| 80 | NULL, |
| 81 | NULL, |
| 82 | }; |
| 83 | |
| 84 | /* |
| 85 | * When OpenSSL is built on Windows, we do not want to require that |
| 86 | * the ZLIB.DLL be available in order for the OpenSSL DLLs to |
| 87 | * work. Therefore, all ZLIB routines are loaded at run time |
| 88 | * and we do not link to a .LIB file when ZLIB_SHARED is set. |
| 89 | */ |
| 90 | #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) |
| 91 | # include <windows.h> |
| 92 | #endif /* !(OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32) */ |
| 93 | |
| 94 | #ifdef ZLIB_SHARED |
| 95 | #include <openssl/dso.h> |
| 96 | |
| 97 | /* Function pointers */ |
| 98 | typedef int (*compress_ft)(Bytef *dest,uLongf *destLen, |
| 99 | const Bytef *source, uLong sourceLen); |
| 100 | typedef int (*inflateEnd_ft)(z_streamp strm); |
| 101 | typedef int (*inflate_ft)(z_streamp strm, int flush); |
| 102 | typedef int (*inflateInit__ft)(z_streamp strm, |
| 103 | const char * version, int stream_size); |
| 104 | typedef int (*deflateEnd_ft)(z_streamp strm); |
| 105 | typedef int (*deflate_ft)(z_streamp strm, int flush); |
| 106 | typedef int (*deflateInit__ft)(z_streamp strm, int level, |
| 107 | const char * version, int stream_size); |
| 108 | typedef const char * (*zError__ft)(int err); |
| 109 | static compress_ft p_compress=NULL; |
| 110 | static inflateEnd_ft p_inflateEnd=NULL; |
| 111 | static inflate_ft p_inflate=NULL; |
| 112 | static inflateInit__ft p_inflateInit_=NULL; |
| 113 | static deflateEnd_ft p_deflateEnd=NULL; |
| 114 | static deflate_ft p_deflate=NULL; |
| 115 | static deflateInit__ft p_deflateInit_=NULL; |
| 116 | static zError__ft p_zError=NULL; |
| 117 | |
| 118 | static int zlib_loaded = 0; /* only attempt to init func pts once */ |
| 119 | static DSO *zlib_dso = NULL; |
| 120 | |
| 121 | #define compress p_compress |
| 122 | #define inflateEnd p_inflateEnd |
| 123 | #define inflate p_inflate |
| 124 | #define inflateInit_ p_inflateInit_ |
| 125 | #define deflateEnd p_deflateEnd |
| 126 | #define deflate p_deflate |
| 127 | #define deflateInit_ p_deflateInit_ |
| 128 | #define zError p_zError |
| 129 | #endif /* ZLIB_SHARED */ |
| 130 | |
| 131 | struct zlib_state |
| 132 | { |
| 133 | z_stream istream; |
| 134 | z_stream ostream; |
| 135 | }; |
| 136 | |
| 137 | static int zlib_stateful_ex_idx = -1; |
| 138 | |
| 139 | static int zlib_stateful_init(COMP_CTX *ctx) |
| 140 | { |
| 141 | int err; |
| 142 | struct zlib_state *state = |
| 143 | (struct zlib_state *)OPENSSL_malloc(sizeof(struct zlib_state)); |
| 144 | |
| 145 | if (state == NULL) |
| 146 | goto err; |
| 147 | |
| 148 | state->istream.zalloc = zlib_zalloc; |
| 149 | state->istream.zfree = zlib_zfree; |
| 150 | state->istream.opaque = Z_NULL; |
| 151 | state->istream.next_in = Z_NULL; |
| 152 | state->istream.next_out = Z_NULL; |
| 153 | state->istream.avail_in = 0; |
| 154 | state->istream.avail_out = 0; |
| 155 | err = inflateInit_(&state->istream, |
| 156 | ZLIB_VERSION, sizeof(z_stream)); |
| 157 | if (err != Z_OK) |
| 158 | goto err; |
| 159 | |
| 160 | state->ostream.zalloc = zlib_zalloc; |
| 161 | state->ostream.zfree = zlib_zfree; |
| 162 | state->ostream.opaque = Z_NULL; |
| 163 | state->ostream.next_in = Z_NULL; |
| 164 | state->ostream.next_out = Z_NULL; |
| 165 | state->ostream.avail_in = 0; |
| 166 | state->ostream.avail_out = 0; |
| 167 | err = deflateInit_(&state->ostream,Z_DEFAULT_COMPRESSION, |
| 168 | ZLIB_VERSION, sizeof(z_stream)); |
| 169 | if (err != Z_OK) |
| 170 | goto err; |
| 171 | |
| 172 | CRYPTO_new_ex_data(CRYPTO_EX_INDEX_COMP,ctx,&ctx->ex_data); |
| 173 | CRYPTO_set_ex_data(&ctx->ex_data,zlib_stateful_ex_idx,state); |
| 174 | return 1; |
| 175 | err: |
| 176 | if (state) OPENSSL_free(state); |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | static void zlib_stateful_finish(COMP_CTX *ctx) |
| 181 | { |
| 182 | struct zlib_state *state = |
| 183 | (struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data, |
| 184 | zlib_stateful_ex_idx); |
| 185 | inflateEnd(&state->istream); |
| 186 | deflateEnd(&state->ostream); |
| 187 | OPENSSL_free(state); |
| 188 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_COMP,ctx,&ctx->ex_data); |
| 189 | } |
| 190 | |
| 191 | static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out, |
| 192 | unsigned int olen, unsigned char *in, unsigned int ilen) |
| 193 | { |
| 194 | int err = Z_OK; |
| 195 | struct zlib_state *state = |
| 196 | (struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data, |
| 197 | zlib_stateful_ex_idx); |
| 198 | |
| 199 | if (state == NULL) |
| 200 | return -1; |
| 201 | |
| 202 | state->ostream.next_in = in; |
| 203 | state->ostream.avail_in = ilen; |
| 204 | state->ostream.next_out = out; |
| 205 | state->ostream.avail_out = olen; |
| 206 | if (ilen > 0) |
| 207 | err = deflate(&state->ostream, Z_SYNC_FLUSH); |
| 208 | if (err != Z_OK) |
| 209 | return -1; |
| 210 | #ifdef DEBUG_ZLIB |
| 211 | fprintf(stderr,"compress(%4d)->%4d %s\n", |
| 212 | ilen,olen - state->ostream.avail_out, |
| 213 | (ilen != olen - state->ostream.avail_out)?"zlib":"clear"); |
| 214 | #endif |
| 215 | return olen - state->ostream.avail_out; |
| 216 | } |
| 217 | |
| 218 | static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out, |
| 219 | unsigned int olen, unsigned char *in, unsigned int ilen) |
| 220 | { |
| 221 | int err = Z_OK; |
| 222 | |
| 223 | struct zlib_state *state = |
| 224 | (struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data, |
| 225 | zlib_stateful_ex_idx); |
| 226 | |
| 227 | if (state == NULL) |
| 228 | return 0; |
| 229 | |
| 230 | state->istream.next_in = in; |
| 231 | state->istream.avail_in = ilen; |
| 232 | state->istream.next_out = out; |
| 233 | state->istream.avail_out = olen; |
| 234 | if (ilen > 0) |
| 235 | err = inflate(&state->istream, Z_SYNC_FLUSH); |
| 236 | if (err != Z_OK) |
| 237 | return -1; |
| 238 | #ifdef DEBUG_ZLIB |
| 239 | fprintf(stderr,"expand(%4d)->%4d %s\n", |
| 240 | ilen,olen - state->istream.avail_out, |
| 241 | (ilen != olen - state->istream.avail_out)?"zlib":"clear"); |
| 242 | #endif |
| 243 | return olen - state->istream.avail_out; |
| 244 | } |
| 245 | |
| 246 | #if 0 |
| 247 | static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out, |
| 248 | unsigned int olen, unsigned char *in, unsigned int ilen) |
| 249 | { |
| 250 | unsigned long l; |
| 251 | int i; |
| 252 | int clear=1; |
| 253 | |
| 254 | if (ilen > 128) |
| 255 | { |
| 256 | out[0]=1; |
| 257 | l=olen-1; |
| 258 | i=compress(&(out[1]),&l,in,(unsigned long)ilen); |
| 259 | if (i != Z_OK) |
| 260 | return(-1); |
| 261 | if (ilen > l) |
| 262 | { |
| 263 | clear=0; |
| 264 | l++; |
| 265 | } |
| 266 | } |
| 267 | if (clear) |
| 268 | { |
| 269 | out[0]=0; |
| 270 | memcpy(&(out[1]),in,ilen); |
| 271 | l=ilen+1; |
| 272 | } |
| 273 | #ifdef DEBUG_ZLIB |
| 274 | fprintf(stderr,"compress(%4d)->%4d %s\n", |
| 275 | ilen,(int)l,(clear)?"clear":"zlib"); |
| 276 | #endif |
| 277 | return((int)l); |
| 278 | } |
| 279 | |
| 280 | static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out, |
| 281 | unsigned int olen, unsigned char *in, unsigned int ilen) |
| 282 | { |
| 283 | unsigned long l; |
| 284 | int i; |
| 285 | |
| 286 | if (in[0]) |
| 287 | { |
| 288 | l=olen; |
| 289 | i=zz_uncompress(out,&l,&(in[1]),(unsigned long)ilen-1); |
| 290 | if (i != Z_OK) |
| 291 | return(-1); |
| 292 | } |
| 293 | else |
| 294 | { |
| 295 | memcpy(out,&(in[1]),ilen-1); |
| 296 | l=ilen-1; |
| 297 | } |
| 298 | #ifdef DEBUG_ZLIB |
| 299 | fprintf(stderr,"expand (%4d)->%4d %s\n", |
| 300 | ilen,(int)l,in[0]?"zlib":"clear"); |
| 301 | #endif |
| 302 | return((int)l); |
| 303 | } |
| 304 | |
| 305 | static int zz_uncompress (Bytef *dest, uLongf *destLen, const Bytef *source, |
| 306 | uLong sourceLen) |
| 307 | { |
| 308 | z_stream stream; |
| 309 | int err; |
| 310 | |
| 311 | stream.next_in = (Bytef*)source; |
| 312 | stream.avail_in = (uInt)sourceLen; |
| 313 | /* Check for source > 64K on 16-bit machine: */ |
| 314 | if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR; |
| 315 | |
| 316 | stream.next_out = dest; |
| 317 | stream.avail_out = (uInt)*destLen; |
| 318 | if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR; |
| 319 | |
| 320 | stream.zalloc = (alloc_func)0; |
| 321 | stream.zfree = (free_func)0; |
| 322 | |
| 323 | err = inflateInit_(&stream, |
| 324 | ZLIB_VERSION, sizeof(z_stream)); |
| 325 | if (err != Z_OK) return err; |
| 326 | |
| 327 | err = inflate(&stream, Z_FINISH); |
| 328 | if (err != Z_STREAM_END) { |
| 329 | inflateEnd(&stream); |
| 330 | return err; |
| 331 | } |
| 332 | *destLen = stream.total_out; |
| 333 | |
| 334 | err = inflateEnd(&stream); |
| 335 | return err; |
| 336 | } |
| 337 | #endif |
| 338 | |
| 339 | #endif |
| 340 | |
| 341 | COMP_METHOD *COMP_zlib(void) |
| 342 | { |
| 343 | COMP_METHOD *meth = &zlib_method_nozlib; |
| 344 | |
| 345 | #ifdef ZLIB_SHARED |
| 346 | if (!zlib_loaded) |
| 347 | { |
| 348 | #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) |
| 349 | zlib_dso = DSO_load(NULL, "ZLIB1", NULL, 0); |
| 350 | #else |
| 351 | zlib_dso = DSO_load(NULL, "z", NULL, 0); |
| 352 | #endif |
| 353 | if (zlib_dso != NULL) |
| 354 | { |
| 355 | p_compress |
| 356 | = (compress_ft) DSO_bind_func(zlib_dso, |
| 357 | "compress"); |
| 358 | p_inflateEnd |
| 359 | = (inflateEnd_ft) DSO_bind_func(zlib_dso, |
| 360 | "inflateEnd"); |
| 361 | p_inflate |
| 362 | = (inflate_ft) DSO_bind_func(zlib_dso, |
| 363 | "inflate"); |
| 364 | p_inflateInit_ |
| 365 | = (inflateInit__ft) DSO_bind_func(zlib_dso, |
| 366 | "inflateInit_"); |
| 367 | p_deflateEnd |
| 368 | = (deflateEnd_ft) DSO_bind_func(zlib_dso, |
| 369 | "deflateEnd"); |
| 370 | p_deflate |
| 371 | = (deflate_ft) DSO_bind_func(zlib_dso, |
| 372 | "deflate"); |
| 373 | p_deflateInit_ |
| 374 | = (deflateInit__ft) DSO_bind_func(zlib_dso, |
| 375 | "deflateInit_"); |
| 376 | p_zError |
| 377 | = (zError__ft) DSO_bind_func(zlib_dso, |
| 378 | "zError"); |
| 379 | |
| 380 | if (p_compress && p_inflateEnd && p_inflate |
| 381 | && p_inflateInit_ && p_deflateEnd |
| 382 | && p_deflate && p_deflateInit_ && p_zError) |
| 383 | zlib_loaded++; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | #endif |
| 388 | #ifdef ZLIB_SHARED |
| 389 | if (zlib_loaded) |
| 390 | #endif |
| 391 | #if defined(ZLIB) || defined(ZLIB_SHARED) |
| 392 | { |
| 393 | /* init zlib_stateful_ex_idx here so that in a multi-process |
| 394 | * application it's enough to intialize openssl before forking |
| 395 | * (idx will be inherited in all the children) */ |
| 396 | if (zlib_stateful_ex_idx == -1) |
| 397 | { |
| 398 | CRYPTO_w_lock(CRYPTO_LOCK_COMP); |
| 399 | if (zlib_stateful_ex_idx == -1) |
| 400 | zlib_stateful_ex_idx = |
| 401 | CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_COMP, |
| 402 | 0,NULL,NULL,NULL,NULL); |
| 403 | CRYPTO_w_unlock(CRYPTO_LOCK_COMP); |
| 404 | if (zlib_stateful_ex_idx == -1) |
| 405 | goto err; |
| 406 | } |
| 407 | |
| 408 | meth = &zlib_stateful_method; |
| 409 | } |
| 410 | err: |
| 411 | #endif |
| 412 | |
| 413 | return(meth); |
| 414 | } |
| 415 | |
| 416 | void COMP_zlib_cleanup(void) |
| 417 | { |
| 418 | #ifdef ZLIB_SHARED |
| 419 | if (zlib_dso) |
| 420 | DSO_free(zlib_dso); |
| 421 | #endif |
| 422 | } |
| 423 | |
| 424 | #ifdef ZLIB |
| 425 | |
| 426 | /* Zlib based compression/decompression filter BIO */ |
| 427 | |
| 428 | typedef struct |
| 429 | { |
| 430 | unsigned char *ibuf; /* Input buffer */ |
| 431 | int ibufsize; /* Buffer size */ |
| 432 | z_stream zin; /* Input decompress context */ |
| 433 | unsigned char *obuf; /* Output buffer */ |
| 434 | int obufsize; /* Output buffer size */ |
| 435 | unsigned char *optr; /* Position in output buffer */ |
| 436 | int ocount; /* Amount of data in output buffer */ |
| 437 | int odone; /* deflate EOF */ |
| 438 | int comp_level; /* Compression level to use */ |
| 439 | z_stream zout; /* Output compression context */ |
| 440 | } BIO_ZLIB_CTX; |
| 441 | |
| 442 | #define ZLIB_DEFAULT_BUFSIZE 1024 |
| 443 | |
| 444 | static int bio_zlib_new(BIO *bi); |
| 445 | static int bio_zlib_free(BIO *bi); |
| 446 | static int bio_zlib_read(BIO *b, char *out, int outl); |
| 447 | static int bio_zlib_write(BIO *b, const char *in, int inl); |
| 448 | static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr); |
| 449 | static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp); |
| 450 | |
| 451 | static BIO_METHOD bio_meth_zlib = |
| 452 | { |
| 453 | BIO_TYPE_COMP, |
| 454 | "zlib", |
| 455 | bio_zlib_write, |
| 456 | bio_zlib_read, |
| 457 | NULL, |
| 458 | NULL, |
| 459 | bio_zlib_ctrl, |
| 460 | bio_zlib_new, |
| 461 | bio_zlib_free, |
| 462 | bio_zlib_callback_ctrl |
| 463 | }; |
| 464 | |
| 465 | BIO_METHOD *BIO_f_zlib(void) |
| 466 | { |
| 467 | return &bio_meth_zlib; |
| 468 | } |
| 469 | |
| 470 | |
| 471 | static int bio_zlib_new(BIO *bi) |
| 472 | { |
| 473 | BIO_ZLIB_CTX *ctx; |
| 474 | #ifdef ZLIB_SHARED |
| 475 | (void)COMP_zlib(); |
| 476 | if (!zlib_loaded) |
| 477 | { |
| 478 | COMPerr(COMP_F_BIO_ZLIB_NEW, COMP_R_ZLIB_NOT_SUPPORTED); |
| 479 | return 0; |
| 480 | } |
| 481 | #endif |
| 482 | ctx = OPENSSL_malloc(sizeof(BIO_ZLIB_CTX)); |
| 483 | if(!ctx) |
| 484 | { |
| 485 | COMPerr(COMP_F_BIO_ZLIB_NEW, ERR_R_MALLOC_FAILURE); |
| 486 | return 0; |
| 487 | } |
| 488 | ctx->ibuf = NULL; |
| 489 | ctx->obuf = NULL; |
| 490 | ctx->ibufsize = ZLIB_DEFAULT_BUFSIZE; |
| 491 | ctx->obufsize = ZLIB_DEFAULT_BUFSIZE; |
| 492 | ctx->zin.zalloc = Z_NULL; |
| 493 | ctx->zin.zfree = Z_NULL; |
| 494 | ctx->zin.next_in = NULL; |
| 495 | ctx->zin.avail_in = 0; |
| 496 | ctx->zin.next_out = NULL; |
| 497 | ctx->zin.avail_out = 0; |
| 498 | ctx->zout.zalloc = Z_NULL; |
| 499 | ctx->zout.zfree = Z_NULL; |
| 500 | ctx->zout.next_in = NULL; |
| 501 | ctx->zout.avail_in = 0; |
| 502 | ctx->zout.next_out = NULL; |
| 503 | ctx->zout.avail_out = 0; |
| 504 | ctx->odone = 0; |
| 505 | ctx->comp_level = Z_DEFAULT_COMPRESSION; |
| 506 | bi->init = 1; |
| 507 | bi->ptr = (char *)ctx; |
| 508 | bi->flags = 0; |
| 509 | return 1; |
| 510 | } |
| 511 | |
| 512 | static int bio_zlib_free(BIO *bi) |
| 513 | { |
| 514 | BIO_ZLIB_CTX *ctx; |
| 515 | if(!bi) return 0; |
| 516 | ctx = (BIO_ZLIB_CTX *)bi->ptr; |
| 517 | if(ctx->ibuf) |
| 518 | { |
| 519 | /* Destroy decompress context */ |
| 520 | inflateEnd(&ctx->zin); |
| 521 | OPENSSL_free(ctx->ibuf); |
| 522 | } |
| 523 | if(ctx->obuf) |
| 524 | { |
| 525 | /* Destroy compress context */ |
| 526 | deflateEnd(&ctx->zout); |
| 527 | OPENSSL_free(ctx->obuf); |
| 528 | } |
| 529 | OPENSSL_free(ctx); |
| 530 | bi->ptr = NULL; |
| 531 | bi->init = 0; |
| 532 | bi->flags = 0; |
| 533 | return 1; |
| 534 | } |
| 535 | |
| 536 | static int bio_zlib_read(BIO *b, char *out, int outl) |
| 537 | { |
| 538 | BIO_ZLIB_CTX *ctx; |
| 539 | int ret; |
| 540 | z_stream *zin; |
| 541 | if(!out || !outl) return 0; |
| 542 | ctx = (BIO_ZLIB_CTX *)b->ptr; |
| 543 | zin = &ctx->zin; |
| 544 | BIO_clear_retry_flags(b); |
| 545 | if(!ctx->ibuf) |
| 546 | { |
| 547 | ctx->ibuf = OPENSSL_malloc(ctx->ibufsize); |
| 548 | if(!ctx->ibuf) |
| 549 | { |
| 550 | COMPerr(COMP_F_BIO_ZLIB_READ, ERR_R_MALLOC_FAILURE); |
| 551 | return 0; |
| 552 | } |
| 553 | inflateInit(zin); |
| 554 | zin->next_in = ctx->ibuf; |
| 555 | zin->avail_in = 0; |
| 556 | } |
| 557 | |
| 558 | /* Copy output data directly to supplied buffer */ |
| 559 | zin->next_out = (unsigned char *)out; |
| 560 | zin->avail_out = (unsigned int)outl; |
| 561 | for(;;) |
| 562 | { |
| 563 | /* Decompress while data available */ |
| 564 | while(zin->avail_in) |
| 565 | { |
| 566 | ret = inflate(zin, 0); |
| 567 | if((ret != Z_OK) && (ret != Z_STREAM_END)) |
| 568 | { |
| 569 | COMPerr(COMP_F_BIO_ZLIB_READ, |
| 570 | COMP_R_ZLIB_INFLATE_ERROR); |
| 571 | ERR_add_error_data(2, "zlib error:", |
| 572 | zError(ret)); |
| 573 | return 0; |
| 574 | } |
| 575 | /* If EOF or we've read everything then return */ |
| 576 | if((ret == Z_STREAM_END) || !zin->avail_out) |
| 577 | return outl - zin->avail_out; |
| 578 | } |
| 579 | |
| 580 | /* No data in input buffer try to read some in, |
| 581 | * if an error then return the total data read. |
| 582 | */ |
| 583 | ret = BIO_read(b->next_bio, ctx->ibuf, ctx->ibufsize); |
| 584 | if(ret <= 0) |
| 585 | { |
| 586 | /* Total data read */ |
| 587 | int tot = outl - zin->avail_out; |
| 588 | BIO_copy_next_retry(b); |
| 589 | if(ret < 0) return (tot > 0) ? tot : ret; |
| 590 | return tot; |
| 591 | } |
| 592 | zin->avail_in = ret; |
| 593 | zin->next_in = ctx->ibuf; |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | static int bio_zlib_write(BIO *b, const char *in, int inl) |
| 598 | { |
| 599 | BIO_ZLIB_CTX *ctx; |
| 600 | int ret; |
| 601 | z_stream *zout; |
| 602 | if(!in || !inl) return 0; |
| 603 | ctx = (BIO_ZLIB_CTX *)b->ptr; |
| 604 | if(ctx->odone) return 0; |
| 605 | zout = &ctx->zout; |
| 606 | BIO_clear_retry_flags(b); |
| 607 | if(!ctx->obuf) |
| 608 | { |
| 609 | ctx->obuf = OPENSSL_malloc(ctx->obufsize); |
| 610 | /* Need error here */ |
| 611 | if(!ctx->obuf) |
| 612 | { |
| 613 | COMPerr(COMP_F_BIO_ZLIB_WRITE, ERR_R_MALLOC_FAILURE); |
| 614 | return 0; |
| 615 | } |
| 616 | ctx->optr = ctx->obuf; |
| 617 | ctx->ocount = 0; |
| 618 | deflateInit(zout, ctx->comp_level); |
| 619 | zout->next_out = ctx->obuf; |
| 620 | zout->avail_out = ctx->obufsize; |
| 621 | } |
| 622 | /* Obtain input data directly from supplied buffer */ |
| 623 | zout->next_in = (void *)in; |
| 624 | zout->avail_in = inl; |
| 625 | for(;;) |
| 626 | { |
| 627 | /* If data in output buffer write it first */ |
| 628 | while(ctx->ocount) { |
| 629 | ret = BIO_write(b->next_bio, ctx->optr, ctx->ocount); |
| 630 | if(ret <= 0) |
| 631 | { |
| 632 | /* Total data written */ |
| 633 | int tot = inl - zout->avail_in; |
| 634 | BIO_copy_next_retry(b); |
| 635 | if(ret < 0) return (tot > 0) ? tot : ret; |
| 636 | return tot; |
| 637 | } |
| 638 | ctx->optr += ret; |
| 639 | ctx->ocount -= ret; |
| 640 | } |
| 641 | |
| 642 | /* Have we consumed all supplied data? */ |
| 643 | if(!zout->avail_in) |
| 644 | return inl; |
| 645 | |
| 646 | /* Compress some more */ |
| 647 | |
| 648 | /* Reset buffer */ |
| 649 | ctx->optr = ctx->obuf; |
| 650 | zout->next_out = ctx->obuf; |
| 651 | zout->avail_out = ctx->obufsize; |
| 652 | /* Compress some more */ |
| 653 | ret = deflate(zout, 0); |
| 654 | if(ret != Z_OK) |
| 655 | { |
| 656 | COMPerr(COMP_F_BIO_ZLIB_WRITE, |
| 657 | COMP_R_ZLIB_DEFLATE_ERROR); |
| 658 | ERR_add_error_data(2, "zlib error:", zError(ret)); |
| 659 | return 0; |
| 660 | } |
| 661 | ctx->ocount = ctx->obufsize - zout->avail_out; |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | static int bio_zlib_flush(BIO *b) |
| 666 | { |
| 667 | BIO_ZLIB_CTX *ctx; |
| 668 | int ret; |
| 669 | z_stream *zout; |
| 670 | ctx = (BIO_ZLIB_CTX *)b->ptr; |
| 671 | /* If no data written or already flush show success */ |
| 672 | if(!ctx->obuf || (ctx->odone && !ctx->ocount)) return 1; |
| 673 | zout = &ctx->zout; |
| 674 | BIO_clear_retry_flags(b); |
| 675 | /* No more input data */ |
| 676 | zout->next_in = NULL; |
| 677 | zout->avail_in = 0; |
| 678 | for(;;) |
| 679 | { |
| 680 | /* If data in output buffer write it first */ |
| 681 | while(ctx->ocount) |
| 682 | { |
| 683 | ret = BIO_write(b->next_bio, ctx->optr, ctx->ocount); |
| 684 | if(ret <= 0) |
| 685 | { |
| 686 | BIO_copy_next_retry(b); |
| 687 | return ret; |
| 688 | } |
| 689 | ctx->optr += ret; |
| 690 | ctx->ocount -= ret; |
| 691 | } |
| 692 | if(ctx->odone) return 1; |
| 693 | |
| 694 | /* Compress some more */ |
| 695 | |
| 696 | /* Reset buffer */ |
| 697 | ctx->optr = ctx->obuf; |
| 698 | zout->next_out = ctx->obuf; |
| 699 | zout->avail_out = ctx->obufsize; |
| 700 | /* Compress some more */ |
| 701 | ret = deflate(zout, Z_FINISH); |
| 702 | if(ret == Z_STREAM_END) ctx->odone = 1; |
| 703 | else if(ret != Z_OK) |
| 704 | { |
| 705 | COMPerr(COMP_F_BIO_ZLIB_FLUSH, |
| 706 | COMP_R_ZLIB_DEFLATE_ERROR); |
| 707 | ERR_add_error_data(2, "zlib error:", zError(ret)); |
| 708 | return 0; |
| 709 | } |
| 710 | ctx->ocount = ctx->obufsize - zout->avail_out; |
| 711 | } |
| 712 | } |
| 713 | |
| 714 | static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr) |
| 715 | { |
| 716 | BIO_ZLIB_CTX *ctx; |
| 717 | int ret, *ip; |
| 718 | int ibs, obs; |
| 719 | if(!b->next_bio) return 0; |
| 720 | ctx = (BIO_ZLIB_CTX *)b->ptr; |
| 721 | switch (cmd) |
| 722 | { |
| 723 | |
| 724 | case BIO_CTRL_RESET: |
| 725 | ctx->ocount = 0; |
| 726 | ctx->odone = 0; |
| 727 | ret = 1; |
| 728 | break; |
| 729 | |
| 730 | case BIO_CTRL_FLUSH: |
| 731 | ret = bio_zlib_flush(b); |
| 732 | if (ret > 0) |
| 733 | ret = BIO_flush(b->next_bio); |
| 734 | break; |
| 735 | |
| 736 | case BIO_C_SET_BUFF_SIZE: |
| 737 | ibs = -1; |
| 738 | obs = -1; |
| 739 | if (ptr != NULL) |
| 740 | { |
| 741 | ip = ptr; |
| 742 | if (*ip == 0) |
| 743 | ibs = (int) num; |
| 744 | else |
| 745 | obs = (int) num; |
| 746 | } |
| 747 | else |
| 748 | { |
| 749 | ibs = (int)num; |
| 750 | obs = ibs; |
| 751 | } |
| 752 | |
| 753 | if (ibs != -1) |
| 754 | { |
| 755 | if (ctx->ibuf) |
| 756 | { |
| 757 | OPENSSL_free(ctx->ibuf); |
| 758 | ctx->ibuf = NULL; |
| 759 | } |
| 760 | ctx->ibufsize = ibs; |
| 761 | } |
| 762 | |
| 763 | if (obs != -1) |
| 764 | { |
| 765 | if (ctx->obuf) |
| 766 | { |
| 767 | OPENSSL_free(ctx->obuf); |
| 768 | ctx->obuf = NULL; |
| 769 | } |
| 770 | ctx->obufsize = obs; |
| 771 | } |
| 772 | ret = 1; |
| 773 | break; |
| 774 | |
| 775 | case BIO_C_DO_STATE_MACHINE: |
| 776 | BIO_clear_retry_flags(b); |
| 777 | ret = BIO_ctrl(b->next_bio, cmd, num, ptr); |
| 778 | BIO_copy_next_retry(b); |
| 779 | break; |
| 780 | |
| 781 | default: |
| 782 | ret = BIO_ctrl(b->next_bio, cmd, num, ptr); |
| 783 | break; |
| 784 | |
| 785 | } |
| 786 | |
| 787 | return ret; |
| 788 | } |
| 789 | |
| 790 | |
| 791 | static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) |
| 792 | { |
| 793 | if(!b->next_bio) |
| 794 | return 0; |
| 795 | return |
| 796 | BIO_callback_ctrl(b->next_bio, cmd, fp); |
| 797 | } |
| 798 | |
| 799 | #endif |