Change this to do what it should have done from the start.

Add argument for buffer for output.
Fix manuals.

lib/libmd/Makefile

@@ -3,13 +3,17 @@
 LIB=	md
 NOPIC=	true
 SRCS=	md2c.c md4c.c md5c.c md2hl.c md4hl.c md5hl.c
-MAN3+=	mdX.3
-MLINKS+=mdX.3 MD2Init.3 mdX.3 MD2Update.3 mdX.3 MD2Final.3
-MLINKS+=mdX.3 MD2End.3  mdX.3 MD2File.3   mdX.3 MD2Data.3
-MLINKS+=mdX.3 MD4Init.3 mdX.3 MD4Update.3 mdX.3 MD4Final.3
-MLINKS+=mdX.3 MD4End.3  mdX.3 MD4File.3   mdX.3 MD4Data.3
-MLINKS+=mdX.3 MD5Init.3 mdX.3 MD5Update.3 mdX.3 MD5Final.3
-MLINKS+=mdX.3 MD5End.3  mdX.3 MD5File.3   mdX.3 MD5Data.3
+.if exists(obj)
+MAN3+=	obj/md2.3 obj/md4.3 obj/md5.3
+.else
+MAN3+=	md2.3 md4.3 md5.3
+.endif
+MLINKS+=md2.3 MD2Init.3 md2.3 MD2Update.3 md2.3 MD2Final.3
+MLINKS+=md2.3 MD2End.3  md2.3 MD2File.3   md2.3 MD2Data.3
+MLINKS+=md4.3 MD4Init.3 md4.3 MD4Update.3 md4.3 MD4Final.3
+MLINKS+=md4.3 MD4End.3  md4.3 MD4File.3   md4.3 MD4Data.3
+MLINKS+=md5.3 MD5Init.3 md5.3 MD5Update.3 md5.3 MD5Final.3
+MLINKS+=md5.3 MD5End.3  md5.3 MD5File.3   md5.3 MD5Data.3
 CLEANFILES+=	md[245]hl.c md[245].ref md[245].3 mddriver
 CFLAGS+= -I${.CURDIR}
 

lib/libmd/md2.h

@@ -33,8 +33,8 @@ typedef struct {
 void   MD2Init(MD2_CTX *);
 void   MD2Update(MD2_CTX *, const unsigned char *, unsigned int);
 void   MD2Final(unsigned char [16], MD2_CTX *);
-char * MD2End(MD2_CTX *);
-char * MD2File(char *);
-char * MD2Data(const unsigned char *, unsigned int);
+char * MD2End(MD2_CTX *, char *);
+char * MD2File(char *, char *);
+char * MD2Data(const unsigned char *, unsigned int, char *);
 
 #endif /* _MD2_H_ */

lib/libmd/md4.h

@@ -35,8 +35,8 @@ typedef struct {
 void   MD4Init(MD4_CTX *);
 void   MD4Update(MD4_CTX *, const unsigned char *, unsigned int);
 void   MD4Final(unsigned char [16], MD4_CTX *);
-char * MD4End(MD4_CTX *);
-char * MD4File(char *);
-char * MD4Data(const unsigned char *, unsigned int);
+char * MD4End(MD4_CTX *, char *);
+char * MD4File(char *, char *);
+char * MD4Data(const unsigned char *, unsigned int, char *);
 
 #endif /* _MD4_H_ */

lib/libmd/md5.h

@@ -36,7 +36,7 @@ typedef struct {
 void   MD5Init (MD5_CTX *);
 void   MD5Update (MD5_CTX *, const unsigned char *, unsigned int);
 void   MD5Final (unsigned char [16], MD5_CTX *);
-char * MD5End(MD5_CTX *);
-char * MD5File(char *);
-char * MD5Data(const unsigned char *, unsigned int);
+char * MD5End(MD5_CTX *, char *);
+char * MD5File(char *, char *);
+char * MD5Data(const unsigned char *, unsigned int, char *);
 #endif /* _MD5_H_ */

lib/libmd/mdX.3

@@ -28,11 +28,11 @@
 .Ft void
 .Fn MDXFinal "unsigned char digest[16]" "MDX_CTX *context"
 .Ft "char *"
-.Fn MDXEnd "MDX_CTX *context"
+.Fn MDXEnd "MDX_CTX *context" "char *buf"
 .Ft "char *"
-.Fn MDXFile "char *filename"
+.Fn MDXFile "char *filename" "char *buf"
 .Ft "char *"
-.Fn MDXData "unsigned char *data" "unsigned int len"
+.Fn MDXData "unsigned char *data" "unsigned int len" "char *buf"
 .Sh DESCRIPTION
 The MDX functions calculate a 128-bit cryptographic checksum (digest)
 for any number of input bytes.  A cryptographic checksum is a one-way
@@ -59,28 +59,37 @@ and finally extract the result using
 .Fn MDXFinal .
 
 .Fn MDXEnd
-is identical to 
+is a wrapper for
 .Fn MDXFinal ,
-except the return is in ASCII-HEX in a 
-string allocated with
-.Xr malloc 3 .
+which converts the return value to a 33 character (incl terminating NULL)
+ascii string which represents the 128 bits in hexadecimal.
 
 .Fn MDXFile
-calculates the digest of a file, and returns the ASCII-HEX result.
+calculates the digest of a file, and uses 
+.Fn MDXFinal
+to return the result.
 In case the file cannot be opened, NULL is returned.
 
 .Fn MDXData
-calculates the digest of a chunk of data in memory, and returns the ASCII-HEX
-result.
+calculates the digest of a chunk of data in memory, and uses
+.Fn MDXFinal
+to return the result.
 
 When using
 .Fn MDXEnd ,
 .Fn MDXFile
-and
+or
 .Fn MDXData ,
-the returned string must be explicitly deallocated using
+the 
+.Ar buf
+argument can be NULL, in which case the returned string is allocated with
+.Xr malloc 3
+and subsequently must be explicitly deallocated using
 .Xr free 3
 after use.
+If the 
+.Ar buf
+argument isn't NULL it must point to at least 33 characters of buffer space.
 .Sh SEE ALSO
 .Xr md2 3 ,
 .Xr md4 3 ,
@@ -111,6 +120,6 @@ No method is known to exist which finds two files having the same hash value,
 nor to find a file with a specific hash value.
 There is on the other hand no guarantee that such a method doesn't exist.
 
-MD2 can only be used for Privacy Enhanced Mail.
+MD2 has only been released for use in Privacy Enhanced eMail.
 Use MD4 or MD5 if that isn't what you're doing.
 .Sh COPYRIGHT

lib/libmd/mdXhl.c

@@ -6,7 +6,7 @@
  * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
  * ----------------------------------------------------------------------------
  *
- * $Id: mdXhl.c,v 1.4 1995/04/27 16:05:51 wollman Exp $
+ * $Id: mdXhl.c,v 1.5 1995/05/30 05:45:17 rgrimes Exp $
  *
  */
 
@@ -20,16 +20,19 @@
 #include <unistd.h>
 
 char *
-MDXEnd(MDX_CTX *ctx)
+MDXEnd(MDX_CTX *ctx, char *buf)
 {
     int i;
     char *p = malloc(33);
     unsigned char digest[16];
     static const char hex[]="0123456789abcdef";
 
-    if(!p) return 0;
+    if (!p)
+        p = malloc(33);
+    if (!p)
+	return 0;
     MDXFinal(digest,ctx);
-    for(i=0;i<16;i++) {
+    for (i=0;i<16;i++) {
 	p[i+i] = hex[digest[i] >> 4];
 	p[i+i+1] = hex[digest[i] & 0x0f];
     }
@@ -38,7 +41,7 @@ MDXEnd(MDX_CTX *ctx)
 }
 
 char *
-MDXFile (char *filename)
+MDXFile (char *filename, char *buf)
 {
     unsigned char buffer[BUFSIZ];
     MDX_CTX ctx;
@@ -46,23 +49,23 @@ MDXFile (char *filename)
 
     MDXInit(&ctx);
     f = open(filename,O_RDONLY);
-    if(f < 0) return 0;
-    while((i = read(f,buffer,sizeof buffer)) > 0) {
+    if (f < 0) return 0;
+    while ((i = read(f,buffer,sizeof buffer)) > 0) {
 	MDXUpdate(&ctx,buffer,i);
     }
     j = errno;
     close(f);
     errno = j;
-    if(i < 0) return 0;
-    return MDXEnd(&ctx);
+    if (i < 0) return 0;
+    return MDXEnd(&ctx, buf);
 }
 
 char *
-MDXData (const unsigned char *data, unsigned int len)
+MDXData (const unsigned char *data, unsigned int len, char *buf)
 {
     MDX_CTX ctx;
 
     MDXInit(&ctx);
     MDXUpdate(&ctx,data,len);
-    return MDXEnd(&ctx);
+    return MDXEnd(&ctx, buf);
 }

lib/libmd/mddriver.c

@@ -42,8 +42,10 @@
 static void MDString (string)
 char *string;
 {
+  char buf[33];
 
-  printf ("MD%d (\"%s\") = %s\n", MD, string, MDData(string,strlen(string)));
+  printf ("MD%d (\"%s\") = %s\n", 
+	MD, string, MDData(string,strlen(string),buf));
 }
 
 /* Digests a reference suite of strings and prints the results.

sys/sys/md5.h

@@ -36,7 +36,7 @@ typedef struct {
 void   MD5Init (MD5_CTX *);
 void   MD5Update (MD5_CTX *, const unsigned char *, unsigned int);
 void   MD5Final (unsigned char [16], MD5_CTX *);
-char * MD5End(MD5_CTX *);
-char * MD5File(char *);
-char * MD5Data(const unsigned char *, unsigned int);
+char * MD5End(MD5_CTX *, char *);
+char * MD5File(char *, char *);
+char * MD5Data(const unsigned char *, unsigned int, char *);
 #endif /* _MD5_H_ */