--- /dev/null
+/*
+ * Copyright 1998-2021 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ *
+ * Uses zstd compression library from https://github.com/facebook/zstd
+ * Requires version 1.4.x (latest as of this writing is 1.4.5)
+ * Using custom free functions require static linking, so that is disabled when
+ * using the shared library.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <openssl/objects.h>
+#include "internal/comp.h"
+#include <openssl/err.h>
+#include "crypto/cryptlib.h"
+#include "internal/bio.h"
+#include "internal/thread_once.h"
+#include "comp_local.h"
+
+COMP_METHOD *COMP_zstd(void);
+
+static COMP_METHOD zstd_method_nozstd = {
+ NID_undef,
+ "(undef)",
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+};
+
+#ifdef OPENSSL_NO_ZSTD
+# undef ZSTD_SHARED
+#else
+
+# ifndef ZSTD_SHARED
+# define ZSTD_STATIC_LINKING_ONLY
+# endif
+# include <zstd.h>
+
+/* Note: There is also a linux zstd.h file in the kernel source */
+# ifndef ZSTD_H_235446
+# error Wrong (i.e. linux) zstd.h included.
+# endif
+
+# if ZSTD_VERSION_MAJOR != 1 && ZSTD_VERSION_MINOR < 4
+# error Expecting version 1.4 or greater of ZSTD
+# endif
+
+# ifndef ZSTD_SHARED
+/* memory allocations functions for zstd initialisation */
+static void *zstd_alloc(void *opaque, size_t size)
+{
+ return OPENSSL_zalloc(size);
+}
+
+static void zstd_free(void *opaque, void *address)
+{
+ OPENSSL_free(address);
+}
+
+static ZSTD_customMem zstd_mem_funcs = {
+ zstd_alloc,
+ zstd_free,
+ NULL
+};
+# endif
+
+/*
+ * When OpenSSL is built on Windows, we do not want to require that
+ * the LIBZSTD.DLL be available in order for the OpenSSL DLLs to
+ * work. Therefore, all ZSTD routines are loaded at run time
+ * and we do not link to a .LIB file when ZSTD_SHARED is set.
+ */
+# if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
+# include <windows.h>
+# endif
+
+# ifdef ZSTD_SHARED
+# include "internal/dso.h"
+
+/* Function pointers */
+typedef ZSTD_CStream* (*createCStream_ft)(void);
+typedef size_t (*initCStream_ft)(ZSTD_CStream*, int);
+typedef size_t (*freeCStream_ft)(ZSTD_CStream*);
+typedef size_t (*compressStream2_ft)(ZSTD_CCtx*, ZSTD_outBuffer*, ZSTD_inBuffer*, ZSTD_EndDirective);
+typedef size_t (*flushStream_ft)(ZSTD_CStream*, ZSTD_outBuffer*);
+typedef size_t (*endStream_ft)(ZSTD_CStream*, ZSTD_outBuffer*);
+typedef size_t (*compress_ft)(void*, size_t, const void*, size_t, int);
+typedef ZSTD_DStream* (*createDStream_ft)(void);
+typedef size_t (*initDStream_ft)(ZSTD_DStream*);
+typedef size_t (*freeDStream_ft)(ZSTD_DStream*);
+typedef size_t (*decompressStream_ft)(ZSTD_DStream*, ZSTD_outBuffer*, ZSTD_inBuffer*);
+typedef size_t (*decompress_ft)(void*, size_t, const void*, size_t);
+typedef unsigned (*isError_ft)(size_t);
+typedef const char* (*getErrorName_ft)(size_t);
+typedef size_t (*DStreamInSize_ft)(void);
+typedef size_t (*CStreamInSize_ft)(void);
+
+static createCStream_ft p_createCStream = NULL;
+static initCStream_ft p_initCStream = NULL;
+static freeCStream_ft p_freeCStream = NULL;
+static compressStream2_ft p_compressStream2 = NULL;
+static flushStream_ft p_flushStream = NULL;
+static endStream_ft p_endStream = NULL;
+static compress_ft p_compress = NULL;
+static createDStream_ft p_createDStream = NULL;
+static initDStream_ft p_initDStream = NULL;
+static freeDStream_ft p_freeDStream = NULL;
+static decompressStream_ft p_decompressStream = NULL;
+static decompress_ft p_decompress = NULL;
+static isError_ft p_isError = NULL;
+static getErrorName_ft p_getErrorName = NULL;
+static DStreamInSize_ft p_DStreamInSize = NULL;
+static CStreamInSize_ft p_CStreamInSize = NULL;
+
+static DSO *zstd_dso = NULL;
+
+# define ZSTD_createCStream p_createCStream
+# define ZSTD_initCStream p_initCStream
+# define ZSTD_freeCStream p_freeCStream
+# define ZSTD_compressStream2 p_compressStream2
+# define ZSTD_flushStream p_flushStream
+# define ZSTD_endStream p_endStream
+# define ZSTD_compress p_compress
+# define ZSTD_createDStream p_createDStream
+# define ZSTD_initDStream p_initDStream
+# define ZSTD_freeDStream p_freeDStream
+# define ZSTD_decompressStream p_decompressStream
+# define ZSTD_decompress p_decompress
+# define ZSTD_isError p_isError
+# define ZSTD_getErrorName p_getErrorName
+# define ZSTD_DStreamInSize p_DStreamInSize
+# define ZSTD_CStreamInSize p_CStreamInSize
+
+# endif /* ifdef ZSTD_SHARED */
+
+struct zstd_state {
+ ZSTD_CStream *compressor;
+ ZSTD_DStream *decompressor;
+};
+
+static int zstd_stateful_init(COMP_CTX *ctx)
+{
+ struct zstd_state *state = OPENSSL_zalloc(sizeof(*state));
+
+ if (state == NULL)
+ return 0;
+
+# ifdef ZSTD_SHARED
+ state->compressor = ZSTD_createCStream();
+# else
+ state->compressor = ZSTD_createCStream_advanced(zstd_mem_funcs);
+# endif
+ if (state->compressor == NULL)
+ goto err;
+ ZSTD_initCStream(state->compressor, ZSTD_CLEVEL_DEFAULT);
+
+# ifdef ZSTD_SHARED
+ state->decompressor = ZSTD_createDStream();
+# else
+ state->decompressor = ZSTD_createDStream_advanced(zstd_mem_funcs);
+# endif
+ if (state->decompressor == NULL)
+ goto err;
+ ZSTD_initDStream(state->decompressor);
+
+ ctx->data = state;
+ return 1;
+ err:
+ ZSTD_freeCStream(state->compressor);
+ ZSTD_freeDStream(state->decompressor);
+ OPENSSL_free(state);
+ return 0;
+}
+
+static void zstd_stateful_finish(COMP_CTX *ctx)
+{
+ struct zstd_state *state = ctx->data;
+
+ if (state != NULL) {
+ ZSTD_freeCStream(state->compressor);
+ ZSTD_freeDStream(state->decompressor);
+ OPENSSL_free(state);
+ ctx->data = NULL;
+ }
+}
+
+static int zstd_stateful_compress_block(COMP_CTX *ctx, unsigned char *out,
+ unsigned int olen, unsigned char *in,
+ unsigned int ilen)
+{
+ ZSTD_inBuffer inbuf;
+ ZSTD_outBuffer outbuf;
+ size_t ret;
+ struct zstd_state *state = ctx->data;
+
+ inbuf.src = in;
+ inbuf.size = ilen;
+ inbuf.pos = 0;
+ outbuf.dst = out;
+ outbuf.size = olen;
+ outbuf.pos = 0;
+
+ if (state == NULL)
+ return -1;
+
+ /* If input length is zero, end the stream/frame ? */
+ if (ilen == 0) {
+ ret = ZSTD_endStream(state->compressor, &outbuf);
+ if (ZSTD_isError(ret))
+ return -1;
+ return outbuf.pos;
+ }
+
+ /*
+ * The finish API does not provide a final output buffer,
+ * so each compress operation has to be ended, if all
+ * the input data can't be accepted, or there is more output,
+ * this has to be considered an error, since there is no more
+ * output buffer space.
+ */
+ do {
+ ret = ZSTD_compressStream2(state->compressor, &outbuf, &inbuf, ZSTD_e_continue);
+ if (ZSTD_isError(ret))
+ return -1;
+ /* do I need to check for ret == 0 ? */
+ } while (inbuf.pos < inbuf.size);
+
+ /* Did not consume all the data */
+ if (inbuf.pos < inbuf.size)
+ return -1;
+
+ ret = ZSTD_flushStream(state->compressor, &outbuf);
+ if (ZSTD_isError(ret))
+ return -1;
+
+ return outbuf.pos;
+}
+
+static int zstd_stateful_expand_block(COMP_CTX *ctx, unsigned char *out,
+ unsigned int olen, unsigned char *in,
+ unsigned int ilen)
+{
+ ZSTD_inBuffer inbuf;
+ ZSTD_outBuffer outbuf;
+ size_t ret;
+ struct zstd_state *state = ctx->data;
+
+ inbuf.src = in;
+ inbuf.size = ilen;
+ inbuf.pos = 0;
+ outbuf.dst = out;
+ outbuf.size = olen;
+ outbuf.pos = 0;
+
+ if (state == NULL)
+ return -1;
+
+ if (ilen == 0)
+ return 0;
+
+ do {
+ ret = ZSTD_decompressStream(state->decompressor, &outbuf, &inbuf);
+ if (ZSTD_isError(ret))
+ return -1;
+ /* If we completed a frame, and there's more data, try again */
+ } while (ret == 0 && inbuf.pos < inbuf.size);
+
+ /* Did not consume all the data */
+ if (inbuf.pos < inbuf.size)
+ return -1;
+
+ return outbuf.pos;
+}
+
+
+static COMP_METHOD zstd_stateful_method = {
+ NID_zstd,
+ LN_zstd,
+ zstd_stateful_init,
+ zstd_stateful_finish,
+ zstd_stateful_compress_block,
+ zstd_stateful_expand_block
+};
+
+static int zstd_oneshot_init(COMP_CTX *ctx)
+{
+ return 1;
+}
+
+static void zstd_oneshot_finish(COMP_CTX *ctx)
+{
+}
+
+static int zstd_oneshot_compress_block(COMP_CTX *ctx, unsigned char *out,
+ unsigned int olen, unsigned char *in,
+ unsigned int ilen)
+{
+ size_t out_size;
+
+ if (ilen == 0)
+ return 0;
+
+ /* Note: uses STDLIB memory allocators */
+ out_size = ZSTD_compress(out, olen, in, ilen, ZSTD_CLEVEL_DEFAULT);
+ if (ZSTD_isError(out_size))
+ return -1;
+
+ return out_size;
+}
+
+static int zstd_oneshot_expand_block(COMP_CTX *ctx, unsigned char *out,
+ unsigned int olen, unsigned char *in,
+ unsigned int ilen)
+{
+ size_t out_size;
+
+ if (ilen == 0)
+ return 0;
+
+ /* Note: uses STDLIB memory allocators */
+ out_size = ZSTD_decompress(out, olen, in, ilen);
+ if (ZSTD_isError(out_size))
+ return -1;
+
+ return out_size;
+}
+
+static COMP_METHOD zstd_oneshot_method = {
+ NID_zstd,
+ LN_zstd,
+ zstd_oneshot_init,
+ zstd_oneshot_finish,
+ zstd_oneshot_compress_block,
+ zstd_oneshot_expand_block
+};
+
+static CRYPTO_ONCE zstd_once = CRYPTO_ONCE_STATIC_INIT;
+DEFINE_RUN_ONCE_STATIC(ossl_comp_zstd_init)
+{
+# ifdef ZSTD_SHARED
+# if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
+# define LIBZSTD "LIBZSTD"
+# else
+# define LIBZSTD "zstd"
+# endif
+
+ zstd_dso = DSO_load(NULL, LIBZSTD, NULL, 0);
+ if (zstd_dso != NULL) {
+ p_createCStream = (createCStream_ft)DSO_bind_func(zstd_dso, "ZSTD_createCStream");
+ p_initCStream = (initCStream_ft)DSO_bind_func(zstd_dso, "ZSTD_initCStream");
+ p_freeCStream = (freeCStream_ft)DSO_bind_func(zstd_dso, "ZSTD_freeCStream");
+ p_compressStream2 = (compressStream2_ft)DSO_bind_func(zstd_dso, "ZSTD_compressStream2");
+ p_flushStream = (flushStream_ft)DSO_bind_func(zstd_dso, "ZSTD_flushStream");
+ p_endStream = (endStream_ft)DSO_bind_func(zstd_dso, "ZSTD_endStream");
+ p_compress = (compress_ft)DSO_bind_func(zstd_dso, "ZSTD_compress");
+ p_createDStream = (createDStream_ft)DSO_bind_func(zstd_dso, "ZSTD_createDStream");
+ p_initDStream = (initDStream_ft)DSO_bind_func(zstd_dso, "ZSTD_initDStream");
+ p_freeDStream = (freeDStream_ft)DSO_bind_func(zstd_dso, "ZSTD_freeDStream");
+ p_decompressStream = (decompressStream_ft)DSO_bind_func(zstd_dso, "ZSTD_decompressStream");
+ p_decompress = (decompress_ft)DSO_bind_func(zstd_dso, "ZSTD_decompress");
+ p_isError = (isError_ft)DSO_bind_func(zstd_dso, "ZSTD_isError");
+ p_getErrorName = (getErrorName_ft)DSO_bind_func(zstd_dso, "ZSTD_getErrorName");
+ p_DStreamInSize = (DStreamInSize_ft)DSO_bind_func(zstd_dso, "ZSTD_DStreamInSize");
+ p_CStreamInSize = (CStreamInSize_ft)DSO_bind_func(zstd_dso, "ZSTD_CStreamInSize");
+ }
+
+ if (p_createCStream == NULL || p_initCStream == NULL || p_freeCStream == NULL
+ || p_compressStream2 == NULL || p_flushStream == NULL || p_endStream == NULL
+ || p_compress == NULL || p_createDStream == NULL || p_initDStream == NULL
+ || p_freeDStream == NULL || p_decompressStream == NULL || p_decompress == NULL
+ || p_isError == NULL || p_getErrorName == NULL || p_DStreamInSize == NULL
+ || p_CStreamInSize == NULL) {
+ ossl_comp_zstd_cleanup();
+ return 0;
+ }
+# endif
+ return 1;
+}
+#endif /* ifndef ZSTD / else */
+
+COMP_METHOD *COMP_zstd(void)
+{
+ COMP_METHOD *meth = &zstd_method_nozstd;
+
+#ifndef OPENSSL_NO_ZSTD
+ if (RUN_ONCE(&zstd_once, ossl_comp_zstd_init))
+ meth = &zstd_stateful_method;
+#endif
+ return meth;
+}
+
+COMP_METHOD *COMP_zstd_oneshot(void)
+{
+ COMP_METHOD *meth = &zstd_method_nozstd;
+
+#ifndef OPENSSL_NO_ZSTD
+ if (RUN_ONCE(&zstd_once, ossl_comp_zstd_init))
+ meth = &zstd_oneshot_method;
+#endif
+ return meth;
+}
+
+/* Also called from OPENSSL_cleanup() */
+void ossl_comp_zstd_cleanup(void)
+{
+#ifdef ZSTD_SHARED
+ DSO_free(zstd_dso);
+ zstd_dso = NULL;
+ p_createCStream = NULL;
+ p_initCStream = NULL;
+ p_freeCStream = NULL;
+ p_compressStream2 = NULL;
+ p_flushStream = NULL;
+ p_endStream = NULL;
+ p_compress = NULL;
+ p_createDStream = NULL;
+ p_initDStream = NULL;
+ p_freeDStream = NULL;
+ p_decompressStream = NULL;
+ p_decompress = NULL;
+ p_isError = NULL;
+ p_getErrorName = NULL;
+ p_DStreamInSize = NULL;
+ p_CStreamInSize = NULL;
+#endif
+}
+
+#ifndef OPENSSL_NO_ZSTD
+
+/* Zstd-based compression/decompression filter BIO */
+
+typedef struct {
+ struct { /* input structure */
+ ZSTD_DStream *state;
+ ZSTD_inBuffer inbuf; /* has const src */
+ size_t bufsize;
+ void* buffer;
+ } decompress;
+ struct { /* output structure */
+ ZSTD_CStream *state;
+ ZSTD_outBuffer outbuf;
+ size_t bufsize;
+ size_t write_pos;
+ } compress;
+} BIO_ZSTD_CTX;
+
+# define ZSTD_DEFAULT_BUFSIZE 1024
+
+static int bio_zstd_new(BIO *bi);
+static int bio_zstd_free(BIO *bi);
+static int bio_zstd_read(BIO *b, char *out, int outl);
+static int bio_zstd_write(BIO *b, const char *in, int inl);
+static long bio_zstd_ctrl(BIO *b, int cmd, long num, void *ptr);
+static long bio_zstd_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp);
+
+static const BIO_METHOD bio_meth_zstd = {
+ BIO_TYPE_COMP,
+ "zstd",
+ /* TODO: Convert to new style write function */
+ bwrite_conv,
+ bio_zstd_write,
+ /* TODO: Convert to new style read function */
+ bread_conv,
+ bio_zstd_read,
+ NULL, /* bio_zstd_puts, */
+ NULL, /* bio_zstd_gets, */
+ bio_zstd_ctrl,
+ bio_zstd_new,
+ bio_zstd_free,
+ bio_zstd_callback_ctrl
+};
+#endif
+
+const BIO_METHOD *BIO_f_zstd(void)
+{
+#ifndef OPENSSL_NO_ZSTD
+ return &bio_meth_zstd;
+#else
+ return NULL;
+#endif
+}
+
+#ifndef OPENSSL_NO_ZSTD
+static int bio_zstd_new(BIO *bi)
+{
+ BIO_ZSTD_CTX *ctx;
+
+# ifdef ZSTD_SHARED
+ (void)COMP_zstd();
+ if (zstd_dso == NULL) {
+ ERR_raise(ERR_LIB_COMP, COMP_R_ZSTD_NOT_SUPPORTED);
+ return 0;
+ }
+# endif
+ ctx = OPENSSL_zalloc(sizeof(*ctx));
+ if (ctx == NULL) {
+ ERR_raise(ERR_LIB_COMP, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+# ifdef ZSTD_SHARED
+ ctx->decompress.state = ZSTD_createDStream();
+# else
+ ctx->decompress.state = ZSTD_createDStream_advanced(zstd_mem_funcs);
+# endif
+ if (ctx->decompress.state == NULL)
+ goto err;
+ ZSTD_initDStream(ctx->decompress.state);
+ ctx->decompress.bufsize = ZSTD_DStreamInSize();
+
+# ifdef ZSTD_SHARED
+ ctx->compress.state = ZSTD_createCStream();
+# else
+ ctx->compress.state = ZSTD_createCStream_advanced(zstd_mem_funcs);
+# endif
+ if (ctx->compress.state == NULL)
+ goto err;
+ ZSTD_initCStream(ctx->compress.state, ZSTD_CLEVEL_DEFAULT);
+ ctx->compress.bufsize = ZSTD_CStreamInSize();
+
+ BIO_set_init(bi, 1);
+ BIO_set_data(bi, ctx);
+
+ return 1;
+ err:
+ ERR_raise(ERR_LIB_COMP, ERR_R_MALLOC_FAILURE);
+ ZSTD_freeDStream(ctx->decompress.state);
+ ZSTD_freeCStream(ctx->compress.state);
+ OPENSSL_free(ctx);
+ return 0;
+}
+
+static int bio_zstd_free(BIO *bi)
+{
+ BIO_ZSTD_CTX *ctx;
+
+ if (bi == NULL)
+ return 0;
+
+ ctx = BIO_get_data(bi);
+ if (ctx != NULL) {
+ ZSTD_freeDStream(ctx->decompress.state);
+ OPENSSL_free(ctx->decompress.buffer);
+ ZSTD_freeCStream(ctx->compress.state);
+ OPENSSL_free(ctx->compress.outbuf.dst);
+ OPENSSL_free(ctx);
+ }
+ BIO_set_data(bi, NULL);
+ BIO_set_init(bi, 0);
+
+ return 1;
+}
+
+static int bio_zstd_read(BIO *b, char *out, int outl)
+{
+ BIO_ZSTD_CTX *ctx;
+ size_t zret;
+ int ret;
+ ZSTD_outBuffer outBuf;
+ BIO *next = BIO_next(b);
+
+ if (out == NULL || outl <= 0)
+ return 0;
+
+ ctx = BIO_get_data(b);
+ BIO_clear_retry_flags(b);
+ if (ctx->decompress.buffer == NULL) {
+ ctx->decompress.buffer = OPENSSL_malloc(ctx->decompress.bufsize);
+ if (ctx->decompress.buffer == NULL) {
+ ERR_raise(ERR_LIB_COMP, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ ctx->decompress.inbuf.src = ctx->decompress.buffer;
+ ctx->decompress.inbuf.size = 0;
+ ctx->decompress.inbuf.pos = 0;
+ }
+
+ /* Copy output data directly to supplied buffer */
+ outBuf.dst = out;
+ outBuf.size = (size_t)outl;
+ outBuf.pos = 0;
+ for (;;) {
+ /* Decompress while data available */
+ do {
+ zret = ZSTD_decompressStream(ctx->decompress.state, &outBuf, &ctx->decompress.inbuf);
+ if (ZSTD_isError(zret)) {
+ ERR_raise(ERR_LIB_COMP, COMP_R_ZSTD_DECOMPRESS_ERROR);
+ ERR_add_error_data(1, ZSTD_getErrorName(zret));
+ return -1;
+ }
+ /* No more output space */
+ if (outBuf.pos == outBuf.size)
+ return outBuf.pos;
+ } while (ctx->decompress.inbuf.pos < ctx->decompress.inbuf.size);
+
+ /*
+ * No data in input buffer try to read some in, if an error then
+ * return the total data read.
+ */
+ ret = BIO_read(next, ctx->decompress.buffer, ctx->decompress.bufsize);
+ if (ret <= 0) {
+ BIO_copy_next_retry(b);
+ if (ret < 0 && outBuf.pos == 0)
+ return ret;
+ return outBuf.pos;
+ }
+ ctx->decompress.inbuf.size = ret;
+ ctx->decompress.inbuf.pos = 0;
+ }
+}
+
+static int bio_zstd_write(BIO *b, const char *in, int inl)
+{
+ BIO_ZSTD_CTX *ctx;
+ size_t zret;
+ ZSTD_inBuffer inBuf;
+ int ret;
+ int done = 0;
+ BIO *next = BIO_next(b);
+
+ if (in == NULL || inl <= 0)
+ return 0;
+
+ ctx = BIO_get_data(b);
+
+ BIO_clear_retry_flags(b);
+ if (ctx->compress.outbuf.dst == NULL) {
+ ctx->compress.outbuf.dst = OPENSSL_malloc(ctx->compress.bufsize);
+ if (ctx->compress.outbuf.dst == NULL) {
+ ERR_raise(ERR_LIB_COMP, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ ctx->compress.outbuf.size = ctx->compress.bufsize;
+ ctx->compress.outbuf.pos = 0;
+ ctx->compress.write_pos = 0;
+ }
+ /* Obtain input data directly from supplied buffer */
+ inBuf.src = in;
+ inBuf.size = inl;
+ inBuf.pos = 0;
+ for (;;) {
+ /* If data in output buffer write it first */
+ while (ctx->compress.write_pos < ctx->compress.outbuf.pos) {
+ ret = BIO_write(next, (unsigned char*)ctx->compress.outbuf.dst + ctx->compress.write_pos,
+ ctx->compress.outbuf.pos - ctx->compress.write_pos);
+ if (ret <= 0) {
+ BIO_copy_next_retry(b);
+ if (ret < 0 && inBuf.pos == 0)
+ return ret;
+ return inBuf.pos;
+ }
+ ctx->compress.write_pos += ret;
+ }
+
+ /* Have we consumed all supplied data? */
+ if (done)
+ return inBuf.pos;
+
+ /* Reset buffer */
+ ctx->compress.outbuf.pos = 0;
+ ctx->compress.outbuf.size = ctx->compress.bufsize;
+ ctx->compress.write_pos = 0;
+ /* Compress some more */
+ zret = ZSTD_compressStream2(ctx->compress.state, &ctx->compress.outbuf, &inBuf, ZSTD_e_end);
+ if (ZSTD_isError(zret)) {
+ ERR_raise(ERR_LIB_COMP, COMP_R_ZSTD_COMPRESS_ERROR);
+ ERR_add_error_data(1, ZSTD_getErrorName(zret));
+ return 0;
+ } else if (zret == 0) {
+ done = 1;
+ }
+ }
+}
+
+static int bio_zstd_flush(BIO *b)
+{
+ BIO_ZSTD_CTX *ctx;
+ size_t zret;
+ int ret;
+ BIO *next = BIO_next(b);
+
+ ctx = BIO_get_data(b);
+
+ /* If no data written or already flush show success */
+ if (ctx->compress.outbuf.dst == NULL)
+ return 1;
+
+ BIO_clear_retry_flags(b);
+ /* No more input data */
+ ctx->compress.outbuf.pos = 0;
+ ctx->compress.outbuf.size = ctx->compress.bufsize;
+ ctx->compress.write_pos = 0;
+ for (;;) {
+ /* If data in output buffer write it first */
+ while (ctx->compress.write_pos < ctx->compress.outbuf.pos) {
+ ret = BIO_write(next, (unsigned char*)ctx->compress.outbuf.dst + ctx->compress.write_pos,
+ ctx->compress.outbuf.pos - ctx->compress.write_pos);
+ if (ret <= 0) {
+ BIO_copy_next_retry(b);
+ return ret;
+ }
+ ctx->compress.write_pos += ret;
+ }
+
+ /* Reset buffer */
+ ctx->compress.outbuf.pos = 0;
+ ctx->compress.outbuf.size = ctx->compress.bufsize;
+ ctx->compress.write_pos = 0;
+ /* Compress some more */
+ zret = ZSTD_flushStream(ctx->compress.state, &ctx->compress.outbuf);
+ if (ZSTD_isError(zret)) {
+ ERR_raise(ERR_LIB_COMP, COMP_R_ZSTD_DECODE_ERROR);
+ ERR_add_error_data(1, ZSTD_getErrorName(zret));
+ return 0;
+ }
+ if (zret == 0)
+ return 1;
+ }
+}
+
+static long bio_zstd_ctrl(BIO *b, int cmd, long num, void *ptr)
+{
+ BIO_ZSTD_CTX *ctx;
+ int ret = 0, *ip;
+ size_t ibs, obs;
+ unsigned char *tmp;
+ BIO *next = BIO_next(b);
+
+ if (next == NULL)
+ return 0;
+ ctx = BIO_get_data(b);
+ switch (cmd) {
+
+ case BIO_CTRL_RESET:
+ ctx->compress.write_pos = 0;
+ ctx->compress.bufsize = 0;
+ ret = 1;
+ break;
+
+ case BIO_CTRL_FLUSH:
+ ret = bio_zstd_flush(b);
+ if (ret > 0)
+ ret = BIO_flush(next);
+ break;
+
+ case BIO_C_SET_BUFF_SIZE:
+ ibs = ctx->decompress.bufsize;
+ obs = ctx->compress.bufsize;
+ if (ptr != NULL) {
+ ip = ptr;
+ if (*ip == 0)
+ ibs = (size_t)num;
+ else
+ obs = (size_t)num;
+ } else {
+ obs = ibs = (size_t)num;
+ }
+
+ if (ibs > 0 && ibs != ctx->decompress.bufsize) {
+ if (ctx->decompress.buffer != NULL) {
+ tmp = OPENSSL_realloc(ctx->decompress.buffer, ibs);
+ if (tmp == NULL)
+ return 0;
+ if (ctx->decompress.inbuf.src == ctx->decompress.buffer)
+ ctx->decompress.inbuf.src = tmp;
+ ctx->decompress.buffer = tmp;
+ }
+ ctx->decompress.bufsize = ibs;
+ }
+
+ if (obs > 0 && obs != ctx->compress.bufsize) {
+ if (ctx->compress.outbuf.dst != NULL) {
+ tmp = OPENSSL_realloc(ctx->compress.outbuf.dst, obs);
+ if (tmp == NULL)
+ return 0;
+ ctx->compress.outbuf.dst = tmp;
+ }
+ ctx->compress.bufsize = obs;
+ }
+ ret = 1;
+ break;
+
+ case BIO_C_DO_STATE_MACHINE:
+ BIO_clear_retry_flags(b);
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ BIO_copy_next_retry(b);
+ break;
+
+ case BIO_CTRL_WPENDING:
+ if (ctx->compress.outbuf.pos < ctx->compress.outbuf.size)
+ ret = 1;
+ else
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+
+ case BIO_CTRL_PENDING:
+ if (ctx->decompress.inbuf.pos < ctx->decompress.inbuf.size)
+ ret = 1;
+ else
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+
+ default:
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+
+ }
+
+ return ret;
+}
+
+static long bio_zstd_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
+{
+ BIO *next = BIO_next(b);
+ if (next == NULL)
+ return 0;
+ return BIO_callback_ctrl(next, cmd, fp);
+}
+
+#endif
projects / openssl.git / blobdiff