Add BUF_strndup() and BUF_memdup(). Not currently used, but I've code

that uses them that I'll commit in a few days.

CHANGES

@@ -4,6 +4,12 @@
 
  Changes between 0.9.7a and 0.9.8  [xx XXX xxxx]
 
+  *) Add the functions BUF_strndup() and BUF_memdup().  BUF_strndup()
+     works like BUF_strdup() but can be used to duplicate a portion of
+     a string.  The copy gets NUL-terminated.  BUF_memdup() duplicates
+     a memory area.
+     [Richard Levitte]
+
   *) Add the function sk_find_ex() which works like sk_find(), but will
      return an index to an element even if an exact match couldn't be
      found.  The index is guaranteed to point at the element where the

crypto/buffer/buf_err.c

 /* crypto/buffer/buf_err.c */
 /* ====================================================================
- * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1999-2003 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
@@ -61,15 +61,16 @@
 #include <stdio.h>
 #include <openssl/err.h>
 #include <openssl/buffer.h>
-#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_ERR is defined */
 
 /* BEGIN ERROR CODES */
 #ifndef OPENSSL_NO_ERR
 static ERR_STRING_DATA BUF_str_functs[]=
 	{
+{ERR_PACK(0,BUF_F_BUF_MEMDUP,0),	"BUF_memdup"},
 {ERR_PACK(0,BUF_F_BUF_MEM_GROW,0),	"BUF_MEM_grow"},
 {ERR_PACK(0,BUF_F_BUF_MEM_NEW,0),	"BUF_MEM_new"},
 {ERR_PACK(0,BUF_F_BUF_STRDUP,0),	"BUF_strdup"},
+{ERR_PACK(0,BUF_F_BUF_STRNDUP,0),	"BUF_strndup"},
 {0,NULL}
 	};
 

crypto/buffer/buffer.c

@@ -163,23 +163,42 @@ int BUF_MEM_grow_clean(BUF_MEM *str, int len)
 	}
 
 char *BUF_strdup(const char *str)
+	{
+	if (str == NULL) return(NULL);
+	return BUF_strndup(str, strlen(str));
+	}
+
+char *BUF_strndup(const char *str, size_t siz)
 	{
 	char *ret;
-	int n;
 
 	if (str == NULL) return(NULL);
 
-	n=strlen(str);
-	ret=OPENSSL_malloc(n+1);
+	ret=OPENSSL_malloc(siz+1);
 	if (ret == NULL) 
 		{
-		BUFerr(BUF_F_BUF_STRDUP,ERR_R_MALLOC_FAILURE);
+		BUFerr(BUF_F_BUF_STRNDUP,ERR_R_MALLOC_FAILURE);
 		return(NULL);
 		}
-	memcpy(ret,str,n+1);
+	BUF_strlcpy(ret,str,siz+1);
 	return(ret);
 	}
 
+void *BUF_memdup(const void *data, size_t siz)
+	{
+	void *ret;
+
+	if (data == NULL) return(NULL);
+
+	ret=OPENSSL_malloc(siz);
+	if (ret == NULL) 
+		{
+		BUFerr(BUF_F_BUF_MEMDUP,ERR_R_MALLOC_FAILURE);
+		return(NULL);
+		}
+	return memcpy(ret, data, siz);
+	}	
+
 size_t BUF_strlcpy(char *dst, const char *src, size_t size)
 	{
 	size_t l = 0;

crypto/buffer/buffer.h

@@ -78,6 +78,8 @@ void	BUF_MEM_free(BUF_MEM *a);
 int	BUF_MEM_grow(BUF_MEM *str, int len);
 int	BUF_MEM_grow_clean(BUF_MEM *str, int len);
 char *	BUF_strdup(const char *str);
+char *	BUF_strndup(const char *str, size_t siz);
+void *	BUF_memdup(const void *data, size_t siz);
 
 /* safe string functions */
 size_t BUF_strlcpy(char *dst,const char *src,size_t siz);
@@ -93,9 +95,11 @@ void ERR_load_BUF_strings(void);
 /* Error codes for the BUF functions. */
 
 /* Function codes. */
+#define BUF_F_BUF_MEMDUP				 103
 #define BUF_F_BUF_MEM_GROW				 100
 #define BUF_F_BUF_MEM_NEW				 101
 #define BUF_F_BUF_STRDUP				 102
+#define BUF_F_BUF_STRNDUP				 104
 
 /* Reason codes. */