diff options
Diffstat (limited to 'crypto/comp')
-rw-r--r-- | crypto/comp/c_zlib.c | 391 | ||||
-rw-r--r-- | crypto/comp/comp.h | 14 | ||||
-rw-r--r-- | crypto/comp/comp_err.c | 9 |
3 files changed, 412 insertions, 2 deletions
diff --git a/crypto/comp/c_zlib.c b/crypto/comp/c_zlib.c index 43402e75db..0f34597e70 100644 --- a/crypto/comp/c_zlib.c +++ b/crypto/comp/c_zlib.c @@ -105,6 +105,7 @@ typedef int (*deflateEnd_ft)(z_streamp strm); typedef int (*deflate_ft)(z_streamp strm, int flush); typedef int (*deflateInit__ft)(z_streamp strm, int level, const char * version, int stream_size); +typedef const char * (*zError__ft)(int err); static compress_ft p_compress=NULL; static inflateEnd_ft p_inflateEnd=NULL; static inflate_ft p_inflate=NULL; @@ -112,6 +113,7 @@ static inflateInit__ft p_inflateInit_=NULL; static deflateEnd_ft p_deflateEnd=NULL; static deflate_ft p_deflate=NULL; static deflateInit__ft p_deflateInit_=NULL; +static zError__ft p_zError=NULL; static int zlib_loaded = 0; /* only attempt to init func pts once */ static DSO *zlib_dso = NULL; @@ -123,6 +125,7 @@ static DSO *zlib_dso = NULL; #define deflateEnd p_deflateEnd #define deflate p_deflate #define deflateInit_ p_deflateInit_ +#define zError p_zError #endif /* ZLIB_SHARED */ struct zlib_state @@ -373,10 +376,13 @@ COMP_METHOD *COMP_zlib(void) p_deflateInit_ = (deflateInit__ft) DSO_bind_func(zlib_dso, "deflateInit_"); + p_zError + = (zError__ft) DSO_bind_func(zlib_dso, + "zError"); if (p_compress && p_inflateEnd && p_inflate && p_inflateInit_ && p_deflateEnd - && p_deflate && p_deflateInit_) + && p_deflate && p_deflateInit_ && p_zError) zlib_loaded++; } } @@ -410,3 +416,386 @@ err: return(meth); } +void COMP_zlib_cleanup(void) + { +#ifdef ZLIB_SHARED + if (zlib_dso) + DSO_free(zlib_dso); +#endif + } + +#ifdef ZLIB + +/* Zlib based compression/decompression filter BIO */ + +typedef struct + { + unsigned char *ibuf; /* Input buffer */ + int ibufsize; /* Buffer size */ + z_stream zin; /* Input decompress context */ + unsigned char *obuf; /* Output buffer */ + int obufsize; /* Output buffer size */ + unsigned char *optr; /* Position in output buffer */ + int ocount; /* Amount of data in output buffer */ + int odone; /* deflate EOF */ + int comp_level; /* Compression level to use */ + z_stream zout; /* Output compression context */ + } BIO_ZLIB_CTX; + +#define ZLIB_DEFAULT_BUFSIZE 1024 + +static int bio_zlib_new(BIO *bi); +static int bio_zlib_free(BIO *bi); +static int bio_zlib_read(BIO *b, char *out, int outl); +static int bio_zlib_write(BIO *b, const char *in, int inl); +static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr); +static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp); + +static BIO_METHOD bio_meth_zlib = + { + BIO_TYPE_COMP, + "zlib", + bio_zlib_write, + bio_zlib_read, + NULL, + NULL, + bio_zlib_ctrl, + bio_zlib_new, + bio_zlib_free, + bio_zlib_callback_ctrl + }; + +BIO_METHOD *BIO_f_zlib(void) + { + return &bio_meth_zlib; + } + + +static int bio_zlib_new(BIO *bi) + { + BIO_ZLIB_CTX *ctx; +#ifdef ZLIB_SHARED + (void)COMP_zlib(); + if (!zlib_loaded) + { + COMPerr(COMP_F_BIO_ZLIB_NEW, COMP_R_ZLIB_NOT_SUPPORTED); + return 0; + } +#endif + ctx = OPENSSL_malloc(sizeof(BIO_ZLIB_CTX)); + if(!ctx) + { + COMPerr(COMP_F_BIO_ZLIB_NEW, ERR_R_MALLOC_FAILURE); + return 0; + } + ctx->ibuf = NULL; + ctx->obuf = NULL; + ctx->ibufsize = ZLIB_DEFAULT_BUFSIZE; + ctx->obufsize = ZLIB_DEFAULT_BUFSIZE; + ctx->zin.zalloc = Z_NULL; + ctx->zin.zfree = Z_NULL; + ctx->zin.next_in = NULL; + ctx->zin.avail_in = 0; + ctx->zin.next_out = NULL; + ctx->zin.avail_out = 0; + ctx->zout.zalloc = Z_NULL; + ctx->zout.zfree = Z_NULL; + ctx->zout.next_in = NULL; + ctx->zout.avail_in = 0; + ctx->zout.next_out = NULL; + ctx->zout.avail_out = 0; + ctx->odone = 0; + ctx->comp_level = Z_DEFAULT_COMPRESSION; + bi->init = 1; + bi->ptr = (char *)ctx; + bi->flags = 0; + return 1; + } + +static int bio_zlib_free(BIO *bi) + { + BIO_ZLIB_CTX *ctx; + if(!bi) return 0; + ctx = (BIO_ZLIB_CTX *)bi->ptr; + if(ctx->ibuf) + { + /* Destroy decompress context */ + inflateEnd(&ctx->zin); + OPENSSL_free(ctx->ibuf); + } + if(ctx->obuf) + { + /* Destroy compress context */ + deflateEnd(&ctx->zout); + OPENSSL_free(ctx->obuf); + } + OPENSSL_free(ctx); + bi->ptr = NULL; + bi->init = 0; + bi->flags = 0; + return 1; + } + +static int bio_zlib_read(BIO *b, char *out, int outl) + { + BIO_ZLIB_CTX *ctx; + int ret; + z_stream *zin; + if(!out || !outl) return 0; + ctx = (BIO_ZLIB_CTX *)b->ptr; + zin = &ctx->zin; + BIO_clear_retry_flags(b); + if(!ctx->ibuf) + { + ctx->ibuf = OPENSSL_malloc(ctx->ibufsize); + if(!ctx->ibuf) + { + COMPerr(COMP_F_BIO_ZLIB_READ, ERR_R_MALLOC_FAILURE); + return 0; + } + inflateInit(zin); + zin->next_in = ctx->ibuf; + zin->avail_in = 0; + } + + /* Copy output data directly to supplied buffer */ + zin->next_out = (unsigned char *)out; + zin->avail_out = (unsigned int)outl; + for(;;) + { + /* Decompress while data available */ + while(zin->avail_in) + { + ret = inflate(zin, 0); + if((ret != Z_OK) && (ret != Z_STREAM_END)) + { + COMPerr(COMP_F_BIO_ZLIB_READ, + COMP_R_ZLIB_INFLATE_ERROR); + ERR_add_error_data(2, "zlib error:", + zError(ret)); + return 0; + } + /* If EOF or we've read everything then return */ + if((ret == Z_STREAM_END) || !zin->avail_out) + return outl - zin->avail_out; + } + + /* No data in input buffer try to read some in, + * if an error then return the total data read. + */ + ret = BIO_read(b->next_bio, ctx->ibuf, ctx->ibufsize); + if(ret <= 0) + { + /* Total data read */ + int tot = outl - zin->avail_out; + BIO_copy_next_retry(b); + if(ret < 0) return (tot > 0) ? tot : ret; + return tot; + } + zin->avail_in = ret; + zin->next_in = ctx->ibuf; + } + } + +static int bio_zlib_write(BIO *b, const char *in, int inl) + { + BIO_ZLIB_CTX *ctx; + int ret; + z_stream *zout; + if(!in || !inl) return 0; + ctx = (BIO_ZLIB_CTX *)b->ptr; + if(ctx->odone) return 0; + zout = &ctx->zout; + BIO_clear_retry_flags(b); + if(!ctx->obuf) + { + ctx->obuf = OPENSSL_malloc(ctx->obufsize); + /* Need error here */ + if(!ctx->obuf) + { + COMPerr(COMP_F_BIO_ZLIB_WRITE, ERR_R_MALLOC_FAILURE); + return 0; + } + ctx->optr = ctx->obuf; + ctx->ocount = 0; + deflateInit(zout, ctx->comp_level); + zout->next_out = ctx->obuf; + zout->avail_out = ctx->obufsize; + } + /* Obtain input data directly from supplied buffer */ + zout->next_in = (void *)in; + zout->avail_in = inl; + for(;;) + { + /* If data in output buffer write it first */ + while(ctx->ocount) { + ret = BIO_write(b->next_bio, ctx->optr, ctx->ocount); + if(ret <= 0) + { + /* Total data written */ + int tot = inl - zout->avail_in; + BIO_copy_next_retry(b); + if(ret < 0) return (tot > 0) ? tot : ret; + return tot; + } + ctx->optr += ret; + ctx->ocount -= ret; + } + + /* Have we consumed all supplied data? */ + if(!zout->avail_in) + return inl; + + /* Compress some more */ + + /* Reset buffer */ + ctx->optr = ctx->obuf; + zout->next_out = ctx->obuf; + zout->avail_out = ctx->obufsize; + /* Compress some more */ + ret = deflate(zout, 0); + if(ret != Z_OK) + { + COMPerr(COMP_F_BIO_ZLIB_WRITE, + COMP_R_ZLIB_DEFLATE_ERROR); + ERR_add_error_data(2, "zlib error:", zError(ret)); + return 0; + } + ctx->ocount = ctx->obufsize - zout->avail_out; + } + } + +static int bio_zlib_flush(BIO *b) + { + BIO_ZLIB_CTX *ctx; + int ret; + z_stream *zout; + ctx = (BIO_ZLIB_CTX *)b->ptr; + /* If no data written or already flush show success */ + if(!ctx->obuf || (ctx->odone && !ctx->ocount)) return 1; + zout = &ctx->zout; + BIO_clear_retry_flags(b); + /* No more input data */ + zout->next_in = NULL; + zout->avail_in = 0; + for(;;) + { + /* If data in output buffer write it first */ + while(ctx->ocount) + { + ret = BIO_write(b->next_bio, ctx->optr, ctx->ocount); + if(ret <= 0) + { + BIO_copy_next_retry(b); + return ret; + } + ctx->optr += ret; + ctx->ocount -= ret; + } + if(ctx->odone) return 1; + + /* Compress some more */ + + /* Reset buffer */ + ctx->optr = ctx->obuf; + zout->next_out = ctx->obuf; + zout->avail_out = ctx->obufsize; + /* Compress some more */ + ret = deflate(zout, Z_FINISH); + if(ret == Z_STREAM_END) ctx->odone = 1; + else if(ret != Z_OK) + { + COMPerr(COMP_F_BIO_ZLIB_FLUSH, + COMP_R_ZLIB_DEFLATE_ERROR); + ERR_add_error_data(2, "zlib error:", zError(ret)); + return 0; + } + ctx->ocount = ctx->obufsize - zout->avail_out; + } + } + +static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr) + { + BIO_ZLIB_CTX *ctx; + int ret, *ip; + int ibs, obs; + if(!b->next_bio) return 0; + ctx = (BIO_ZLIB_CTX *)b->ptr; + switch (cmd) + { + + case BIO_CTRL_RESET: + ctx->ocount = 0; + ctx->odone = 0; + break; + + case BIO_CTRL_FLUSH: + ret = bio_zlib_flush(b); + if (ret > 0) + ret = BIO_flush(b->next_bio); + break; + + case BIO_C_SET_BUFF_SIZE: + ibs = -1; + obs = -1; + if (ptr != NULL) + { + ip = ptr; + if (*ip == 0) + ibs = (int) num; + else + obs = (int) num; + } + else + { + ibs = (int)num; + obs = ibs; + } + + if (ibs != -1) + { + if (ctx->ibuf) + { + OPENSSL_free(ctx->ibuf); + ctx->ibuf = NULL; + } + ctx->ibufsize = ibs; + } + + if (obs != -1) + { + if (ctx->obuf) + { + OPENSSL_free(ctx->obuf); + ctx->obuf = NULL; + } + ctx->obufsize = obs; + } + + break; + + case BIO_C_DO_STATE_MACHINE: + BIO_clear_retry_flags(b); + ret = BIO_ctrl(b->next_bio, cmd, num, ptr); + BIO_copy_next_retry(b); + break; + + default: + ret = BIO_ctrl(b->next_bio, cmd, num, ptr); + break; + + } + + return ret; + } + + +static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) + { + if(!b->next_bio) + return 0; + return + BIO_callback_ctrl(b->next_bio, cmd, fp); + } + +#endif diff --git a/crypto/comp/comp.h b/crypto/comp/comp.h index 5d59354a57..4b405c7d49 100644 --- a/crypto/comp/comp.h +++ b/crypto/comp/comp.h @@ -47,6 +47,13 @@ int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen, unsigned char *in, int ilen); COMP_METHOD *COMP_rle(void ); COMP_METHOD *COMP_zlib(void ); +void COMP_zlib_cleanup(void); + +#ifdef HEADER_BIO_H +#ifdef ZLIB +BIO_METHOD *BIO_f_zlib(void); +#endif +#endif /* BEGIN ERROR CODES */ /* The following lines are auto generated by the script mkerr.pl. Any changes @@ -57,8 +64,15 @@ void ERR_load_COMP_strings(void); /* Error codes for the COMP functions. */ /* Function codes. */ +#define COMP_F_BIO_ZLIB_FLUSH 99 +#define COMP_F_BIO_ZLIB_NEW 100 +#define COMP_F_BIO_ZLIB_READ 101 +#define COMP_F_BIO_ZLIB_WRITE 102 /* Reason codes. */ +#define COMP_R_ZLIB_DEFLATE_ERROR 99 +#define COMP_R_ZLIB_INFLATE_ERROR 100 +#define COMP_R_ZLIB_NOT_SUPPORTED 101 #ifdef __cplusplus } diff --git a/crypto/comp/comp_err.c b/crypto/comp/comp_err.c index aad3235cf3..661c94c3a4 100644 --- a/crypto/comp/comp_err.c +++ b/crypto/comp/comp_err.c @@ -1,6 +1,6 @@ /* crypto/comp/comp_err.c */ /* ==================================================================== - * Copyright (c) 1999-2006 The OpenSSL Project. All rights reserved. + * Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -70,11 +70,18 @@ static ERR_STRING_DATA COMP_str_functs[]= { +{ERR_FUNC(COMP_F_BIO_ZLIB_FLUSH), "BIO_ZLIB_FLUSH"}, +{ERR_FUNC(COMP_F_BIO_ZLIB_NEW), "BIO_ZLIB_NEW"}, +{ERR_FUNC(COMP_F_BIO_ZLIB_READ), "BIO_ZLIB_READ"}, +{ERR_FUNC(COMP_F_BIO_ZLIB_WRITE), "BIO_ZLIB_WRITE"}, {0,NULL} }; static ERR_STRING_DATA COMP_str_reasons[]= { +{ERR_REASON(COMP_R_ZLIB_DEFLATE_ERROR) ,"zlib deflate error"}, +{ERR_REASON(COMP_R_ZLIB_INFLATE_ERROR) ,"zlib inflate error"}, +{ERR_REASON(COMP_R_ZLIB_NOT_SUPPORTED) ,"zlib not supported"}, {0,NULL} }; |