--- a/libtomcrypt/src/hashes/helper/hash_filehandle.c	Thu Feb 08 23:11:40 2018 +0800
+++ b/libtomcrypt/src/hashes/helper/hash_filehandle.c	Fri Feb 09 21:44:05 2018 +0800
@@ -5,11 +5,10 @@
  *
  * The library is free for all purposes without any express
  * guarantee it works.
- *
- * Tom St Denis, [email protected], http://libtom.org
  */
 #include "tomcrypt.h"
 
+#ifndef LTC_NO_FILE
 /**
    @file hash_filehandle.c
    Hash open files, Tom St Denis
@@ -25,12 +24,8 @@
 */
 int hash_filehandle(int hash, FILE *in, unsigned char *out, unsigned long *outlen)
 {
-#ifdef LTC_NO_FILE
-    (void)hash; (void)in; (void)out; (void)outlen;
-    return CRYPT_NOP;
-#else
     hash_state md;
-    unsigned char buf[512];
+    unsigned char *buf;
     size_t x;
     int err;
 
@@ -38,35 +33,42 @@
     LTC_ARGCHK(outlen != NULL);
     LTC_ARGCHK(in     != NULL);
 
+    if ((buf = XMALLOC(LTC_FILE_READ_BUFSIZE)) == NULL) {
+        return CRYPT_MEM;
+    }
+
     if ((err = hash_is_valid(hash)) != CRYPT_OK) {
-        return err;
+        goto LBL_ERR;
     }
 
     if (*outlen < hash_descriptor[hash].hashsize) {
        *outlen = hash_descriptor[hash].hashsize;
-       return CRYPT_BUFFER_OVERFLOW;
+       err = CRYPT_BUFFER_OVERFLOW;
+       goto LBL_ERR;
     }
     if ((err = hash_descriptor[hash].init(&md)) != CRYPT_OK) {
-       return err;
+       goto LBL_ERR;
     }
 
+    do {
+        x = fread(buf, 1, LTC_FILE_READ_BUFSIZE, in);
+        if ((err = hash_descriptor[hash].process(&md, buf, (unsigned long)x)) != CRYPT_OK) {
+           goto LBL_CLEANBUF;
+        }
+    } while (x == LTC_FILE_READ_BUFSIZE);
+    if ((err = hash_descriptor[hash].done(&md, out)) == CRYPT_OK) {
     *outlen = hash_descriptor[hash].hashsize;
-    do {
-        x = fread(buf, 1, sizeof(buf), in);
-        if ((err = hash_descriptor[hash].process(&md, buf, x)) != CRYPT_OK) {
-           return err;
         }
-    } while (x == sizeof(buf));
-    err = hash_descriptor[hash].done(&md, out);
 
-#ifdef LTC_CLEAN_STACK
-    zeromem(buf, sizeof(buf));
-#endif
+LBL_CLEANBUF:
+    zeromem(buf, LTC_FILE_READ_BUFSIZE);
+LBL_ERR:
+    XFREE(buf);
     return err;
-#endif
 }
+#endif /* #ifndef LTC_NO_FILE */
 
 
-/* $Source$ */
-/* $Revision$ */
-/* $Date$ */
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */