From 52c7413490876d8fe7446a40eec79f0a1a74ffc7 Mon Sep 17 00:00:00 2001
From: tb <>
Date: Sun, 11 Jun 2023 05:35:43 +0000
Subject: Unifdef ZLIB

This has long been unused code and compilation with -DZLIB was broken
for a long time after BIO was made opaque.

ok jsing
---
 src/lib/libcrypto/comp/c_zlib.c | 542 +---------------------------------------
 1 file changed, 2 insertions(+), 540 deletions(-)

(limited to 'src/lib/libcrypto/comp/c_zlib.c')

diff --git a/src/lib/libcrypto/comp/c_zlib.c b/src/lib/libcrypto/comp/c_zlib.c
index 009737d59d..ec98b26f5c 100644
--- a/src/lib/libcrypto/comp/c_zlib.c
+++ b/src/lib/libcrypto/comp/c_zlib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: c_zlib.c,v 1.26 2023/04/17 13:18:00 tb Exp $ */
+/* $OpenBSD: c_zlib.c,v 1.27 2023/06/11 05:35:43 tb Exp $ */
 /*
  * ---------------------------------------------------------------------------
  * Major patches to this file were contributed by
@@ -132,551 +132,13 @@ static COMP_METHOD zlib_method_nozlib = {
 	.name = "(undef)"
 };
 
-#ifdef ZLIB
-
-#include <zlib.h>
-
-static int zlib_stateful_init(COMP_CTX *ctx);
-static void zlib_stateful_finish(COMP_CTX *ctx);
-static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out,
-    unsigned int olen, unsigned char *in, unsigned int ilen);
-static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out,
-    unsigned int olen, unsigned char *in, unsigned int ilen);
-
-
-/* memory allocations functions for zlib initialization */
-static void*
-zlib_zalloc(void* opaque, unsigned int no, unsigned int size)
-{
-	return calloc(no, size);
-}
-
-static void
-zlib_zfree(void* opaque, void* address)
-{
-	free(address);
-}
-
-static COMP_METHOD zlib_stateful_method = {
-	.type = NID_zlib_compression,
-	.name = LN_zlib_compression,
-	.init = zlib_stateful_init,
-	.finish = zlib_stateful_finish,
-	.compress = zlib_stateful_compress_block,
-	.expand = zlib_stateful_expand_block
-};
-
-struct zlib_state {
-	z_stream istream;
-	z_stream ostream;
-};
-
-static int zlib_stateful_ex_idx = -1;
-
-static int
-zlib_stateful_init(COMP_CTX *ctx)
-{
-	int err;
-	struct zlib_state *state = malloc(sizeof(struct zlib_state));
-
-	if (state == NULL)
-		goto err;
-
-	state->istream.zalloc = zlib_zalloc;
-	state->istream.zfree = zlib_zfree;
-	state->istream.opaque = Z_NULL;
-	state->istream.next_in = Z_NULL;
-	state->istream.next_out = Z_NULL;
-	state->istream.avail_in = 0;
-	state->istream.avail_out = 0;
-	err = inflateInit_(&state->istream, ZLIB_VERSION, sizeof(z_stream));
-	if (err != Z_OK)
-		goto err;
-
-	state->ostream.zalloc = zlib_zalloc;
-	state->ostream.zfree = zlib_zfree;
-	state->ostream.opaque = Z_NULL;
-	state->ostream.next_in = Z_NULL;
-	state->ostream.next_out = Z_NULL;
-	state->ostream.avail_in = 0;
-	state->ostream.avail_out = 0;
-	err = deflateInit_(&state->ostream, Z_DEFAULT_COMPRESSION,
-	    ZLIB_VERSION, sizeof(z_stream));
-	if (err != Z_OK)
-		goto err;
-
-	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_COMP, ctx, &ctx->ex_data);
-	CRYPTO_set_ex_data(&ctx->ex_data, zlib_stateful_ex_idx, state);
-	return 1;
-
-err:
-	free(state);
-	return 0;
-}
-
-static void
-zlib_stateful_finish(COMP_CTX *ctx)
-{
-	struct zlib_state *state =
-	    (struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data,
-	    zlib_stateful_ex_idx);
-
-	inflateEnd(&state->istream);
-	deflateEnd(&state->ostream);
-	free(state);
-	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_COMP, ctx, &ctx->ex_data);
-}
-
-static int
-zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out,
-    unsigned int olen, unsigned char *in, unsigned int ilen)
-{
-	int err = Z_OK;
-	struct zlib_state *state =
-	    (struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data,
-	    zlib_stateful_ex_idx);
-
-	if (state == NULL)
-		return -1;
-
-	state->ostream.next_in = in;
-	state->ostream.avail_in = ilen;
-	state->ostream.next_out = out;
-	state->ostream.avail_out = olen;
-	if (ilen > 0)
-		err = deflate(&state->ostream, Z_SYNC_FLUSH);
-	if (err != Z_OK)
-		return -1;
-
-#ifdef DEBUG_ZLIB
-	fprintf(stderr, "compress(%4d)->%4d %s\n",
-	    ilen, olen - state->ostream.avail_out,
-	    (ilen != olen - state->ostream.avail_out)?"zlib":"clear");
-#endif
-
-	return olen - state->ostream.avail_out;
-}
-
-static int
-zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out,
-    unsigned int olen, unsigned char *in, unsigned int ilen)
-{
-	int err = Z_OK;
-
-	struct zlib_state *state =
-	    (struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data,
-	    zlib_stateful_ex_idx);
-
-	if (state == NULL)
-		return 0;
-
-	state->istream.next_in = in;
-	state->istream.avail_in = ilen;
-	state->istream.next_out = out;
-	state->istream.avail_out = olen;
-	if (ilen > 0)
-		err = inflate(&state->istream, Z_SYNC_FLUSH);
-	if (err != Z_OK)
-		return -1;
-
-#ifdef DEBUG_ZLIB
-	fprintf(stderr, "expand(%4d)->%4d %s\n",
-	    ilen, olen - state->istream.avail_out,
-	    (ilen != olen - state->istream.avail_out)?"zlib":"clear");
-#endif
-
-	return olen - state->istream.avail_out;
-}
-
-#endif
-
 COMP_METHOD *
 COMP_zlib(void)
 {
-	COMP_METHOD *meth = &zlib_method_nozlib;
-
-#ifdef ZLIB
-	{
-		/* init zlib_stateful_ex_idx here so that in a multi-process
-		 * application it's enough to initialize openssl before forking
-		 * (idx will be inherited in all the children) */
-		if (zlib_stateful_ex_idx == -1) {
-			CRYPTO_w_lock(CRYPTO_LOCK_COMP);
-			if (zlib_stateful_ex_idx == -1)
-				zlib_stateful_ex_idx =
-			    CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_COMP,
-			    0, NULL, NULL, NULL, NULL);
-			CRYPTO_w_unlock(CRYPTO_LOCK_COMP);
-			if (zlib_stateful_ex_idx == -1)
-				goto err;
-		}
-		if (!OPENSSL_init_crypto(0, NULL))
-			goto err;
-
-		meth = &zlib_stateful_method;
-	}
-
-err:
-#endif
-
-	return (meth);
+	return &zlib_method_nozlib;
 }
 
 void
 COMP_zlib_cleanup(void)
 {
 }
-
-#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 = {
-	.type = BIO_TYPE_COMP,
-	.name = "zlib",
-	.bwrite = bio_zlib_write,
-	.bread = bio_zlib_read,
-	.ctrl = bio_zlib_ctrl,
-	.create = bio_zlib_new,
-	.destroy = bio_zlib_free,
-	.callback_ctrl = 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;
-
-	ctx = malloc(sizeof(BIO_ZLIB_CTX));
-	if (!ctx) {
-		COMPerror(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);
-		free(ctx->ibuf);
-	}
-	if (ctx->obuf) {
-		/* Destroy compress context */
-		deflateEnd(&ctx->zout);
-		free(ctx->obuf);
-	}
-	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 = malloc(ctx->ibufsize);
-		if (!ctx->ibuf) {
-			COMPerror(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)) {
-				COMPerror(COMP_R_ZLIB_INFLATE_ERROR);
-				ERR_asprintf_error_data("zlib error:%s",
-				    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 = malloc(ctx->obufsize);
-		/* Need error here */
-		if (!ctx->obuf) {
-			COMPerror(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) {
-			COMPerror(COMP_R_ZLIB_DEFLATE_ERROR);
-			ERR_asprintf_error_data("zlib error:%s", 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) {
-			COMPerror(COMP_R_ZLIB_DEFLATE_ERROR);
-			ERR_asprintf_error_data("zlib error:%s", 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;
-		ret = 1;
-		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) {
-			free(ctx->ibuf);
-			ctx->ibuf = NULL;
-			ctx->ibufsize = ibs;
-		}
-
-		if (obs != -1) {
-			free(ctx->obuf);
-			ctx->obuf = NULL;
-			ctx->obufsize = obs;
-		}
-		ret = 1;
-		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
-- 
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