Import of old SSLeay release: SSLeay 0.8.1b
diff --git a/crypto/mem.c b/crypto/mem.c
new file mode 100644
index 0000000..4274cc9
--- /dev/null
+++ b/crypto/mem.c
@@ -0,0 +1,355 @@
+/* crypto/mem.c */
+/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "buffer.h"
+#include "bio.h"
+#include "lhash.h"
+#include "cryptlib.h"
+
+static int mh_mode=CRYPTO_MEM_CHECK_OFF;
+static unsigned long order=0;
+
+static LHASH *mh=NULL;
+
+typedef struct mem_st
+ {
+ char *addr;
+ int num;
+ char *file;
+ int line;
+ unsigned long order;
+ } MEM;
+
+int CRYPTO_mem_ctrl(mode)
+int mode;
+ {
+ int ret=mh_mode;
+
+ CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
+ switch (mode)
+ {
+ case CRYPTO_MEM_CHECK_ON:
+ mh_mode|=CRYPTO_MEM_CHECK_ON;
+ break;
+ case CRYPTO_MEM_CHECK_OFF:
+ mh_mode&= ~CRYPTO_MEM_CHECK_ON;
+ break;
+ default:
+ break;
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
+ return(ret);
+ }
+
+static int mem_cmp(a,b)
+MEM *a,*b;
+ {
+ return(a->addr - b->addr);
+ }
+
+static unsigned long mem_hash(a)
+MEM *a;
+ {
+ unsigned long ret;
+
+ ret=(unsigned long)a->addr;
+
+ ret=ret*17851+(ret>>14)*7+(ret>>4)*251;
+ return(ret);
+ }
+
+static char *(*malloc_func)()= (char *(*)())malloc;
+static char *(*realloc_func)()= (char *(*)())realloc;
+static void (*free_func)()= (void (*)())free;
+
+void CRYPTO_set_mem_functions(m,r,f)
+char *(*m)();
+char *(*r)();
+void (*f)();
+ {
+ if ((m == NULL) || (r == NULL) || (f == NULL)) return;
+ malloc_func=m;
+ realloc_func=r;
+ free_func=f;
+ }
+
+void CRYPTO_get_mem_functions(m,r,f)
+char *(**m)();
+char *(**r)();
+void (**f)();
+ {
+ if (m != NULL) *m=malloc_func;
+ if (r != NULL) *r=realloc_func;
+ if (f != NULL) *f=free_func;
+ }
+
+char *CRYPTO_malloc(num)
+int num;
+ {
+ return(malloc_func(num));
+ }
+
+char *CRYPTO_realloc(str,num)
+char *str;
+int num;
+ {
+ return(realloc_func(str,num));
+ }
+
+void CRYPTO_free(str)
+char *str;
+ {
+ free_func(str);
+ }
+
+char *CRYPTO_dbg_malloc(num,file,line)
+int num;
+char *file;
+int line;
+ {
+ char *ret;
+ MEM *m;
+
+ if ((ret=malloc_func(num)) == NULL)
+ return(NULL);
+
+ if (mh_mode & CRYPTO_MEM_CHECK_ON)
+ {
+ if ((m=(MEM *)malloc(sizeof(MEM))) == NULL)
+ {
+ free(ret);
+ return(NULL);
+ }
+ CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
+ if (mh == NULL)
+ {
+ if ((mh=lh_new(mem_hash,mem_cmp)) == NULL)
+ {
+ free(ret);
+ free(m);
+ return(NULL);
+ }
+ }
+
+ m->addr=ret;
+ m->file=file;
+ m->line=line;
+ m->num=num;
+ m->order=order++;
+ if (lh_insert(mh,(char *)m) != NULL)
+ {
+ free(m);
+ free(ret);
+ /* abort(); */
+ ret=NULL;
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
+ }
+ return(ret);
+ }
+
+void CRYPTO_dbg_free(addr)
+char *addr;
+ {
+ MEM m,*mp;
+
+ if ((mh_mode & CRYPTO_MEM_CHECK_ON) && (mh != NULL))
+ {
+ CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
+ m.addr=addr;
+ mp=(MEM *)lh_delete(mh,(char *)&m);
+ if (mp != NULL)
+ free(mp);
+ CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
+ }
+ free_func(addr);
+ }
+
+char *CRYPTO_dbg_realloc(addr,num,file,line)
+char *addr;
+int num;
+char *file;
+int line;
+ {
+ char *ret;
+ MEM m,*mp;
+
+ ret=realloc_func(addr,num);
+ if (ret == addr) return(ret);
+
+ if (mh_mode & CRYPTO_MEM_CHECK_ON)
+ {
+ if (ret == NULL) return(NULL);
+ m.addr=addr;
+ CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
+ mp=(MEM *)lh_delete(mh,(char *)&m);
+ if (mp != NULL)
+ {
+ mp->addr=ret;
+ lh_insert(mh,(char *)mp);
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
+ }
+ return(ret);
+ }
+
+char *CRYPTO_remalloc(a,n)
+char *a;
+int n;
+ {
+ if (a != NULL) Free(a);
+ a=(char *)Malloc(n);
+ return(a);
+ }
+
+char *CRYPTO_dbg_remalloc(a,n,file,line)
+char *a;
+int n;
+char *file;
+int line;
+ {
+ if (a != NULL) CRYPTO_dbg_free(a);
+ a=(char *)CRYPTO_dbg_malloc(n,file,line);
+ return(a);
+ }
+
+
+typedef struct mem_leak_st
+ {
+ BIO *bio;
+ int chunks;
+ long bytes;
+ } MEM_LEAK;
+
+static void print_leak(m,l)
+MEM *m;
+MEM_LEAK *l;
+ {
+ char buf[128];
+
+ sprintf(buf,"%5ld file=%s, line=%d, number=%d, address=%08lX\n",
+ m->order,m->file,m->line,m->num,(long)m->addr);
+ BIO_puts(l->bio,buf);
+ l->chunks++;
+ l->bytes+=m->num;
+ }
+
+void CRYPTO_mem_leaks(b)
+BIO *b;
+ {
+ MEM_LEAK ml;
+ char buf[80];
+
+ if (mh == NULL) return;
+ ml.bio=b;
+ ml.bytes=0;
+ ml.chunks=0;
+ CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
+ lh_doall_arg(mh,(void (*)())print_leak,(char *)&ml);
+ CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
+ if (ml.chunks != 0)
+ {
+ sprintf(buf,"%ld bytes leaked in %d chunks\n",
+ ml.bytes,ml.chunks);
+ BIO_puts(b,buf);
+ }
+ /*
+ lh_stats_bio(mh,b);
+ lh_node_stats_bio(mh,b);
+ lh_node_usage_stats_bio(mh,b);
+ */
+ }
+
+static void (*mem_cb)()=NULL;
+
+static void cb_leak(m,cb)
+MEM *m;
+char *cb;
+ {
+ void (*mem_callback)()=(void (*)())cb;
+ mem_callback(m->order,m->file,m->line,m->num,m->addr);
+ }
+
+void CRYPTO_mem_leaks_cb(cb)
+void (*cb)();
+ {
+ if (mh == NULL) return;
+ CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
+ mem_cb=cb;
+ lh_doall_arg(mh,(void (*)())cb_leak,(char *)mem_cb);
+ mem_cb=NULL;
+ CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
+ }
+
+#ifndef WIN16
+void CRYPTO_mem_leaks_fp(fp)
+FILE *fp;
+ {
+ BIO *b;
+
+ if (mh == NULL) return;
+ if ((b=BIO_new(BIO_s_file())) == NULL)
+ return;
+ BIO_set_fp(b,fp,BIO_NOCLOSE);
+ CRYPTO_mem_leaks(b);
+ BIO_free(b);
+ }
+#endif
+
