1 files changed, 85 insertions, 0 deletions
diff --git a/src/md5util.c b/src/md5util.c
new file mode 100644
index 0000000..41a5a31
--- /dev/null
+++ b/src/md5util.c
@@ -0,0 +1,85 @@
+/***
+  This file is part of pam_dotfile.
+
+  pam_dotfile is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+  
+  pam_dotfile is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+  
+  You should have received a copy of the GNU General Public License
+  along with pam_dotfile; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA
+***/
+
+#include <unistd.h>
+#include <sys/mman.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "md5util.h"
+#include "md5.h"
+
+void fhex(const unsigned char *bin,int len, char *txt) {
+    const static char hex[] = "0123456789abcdef";
+    int i;
+
+    for (i = 0; i < len; i++) {
+        txt[i*2] = hex[bin[i]>>4];
+        txt[i*2+1] = hex[bin[i]&0xF];
+    }
+}
+
+#define MMAPSIZE (100*1024*1024)
+#define BUFSIZE (1024*1024)
+
+int fdmd5(int fd, size_t l, char *md) {
+    void *d;
+    off_t o = 0;
+    size_t m;
+    int r = 0;
+    md5_state_t s;
+
+    md5_init(&s);
+
+    m = l < MMAPSIZE ? l : MMAPSIZE;
+
+    while (l > 0 && (d = mmap(NULL, m, PROT_READ, MAP_SHARED, fd, o))) {
+        md5_append(&s, d, m);
+        munmap(d, m);
+        
+        o += m;
+        l -= m;
+        m = l < MMAPSIZE ? l : MMAPSIZE;
+        
+    }
+
+    if (l > 0) {
+        void *p;
+        fprintf(stderr, "mmap() failed\n");
+
+        if (!(p = malloc(BUFSIZE)))
+            r = -1;
+        else {
+            
+            for (;;) {
+                ssize_t r;
+                
+                if ((r = read(fd, p, BUFSIZE)) <= 0)
+                    break;
+                
+                md5_append(&s, p, r);
+            }
+            
+            free(p);
+        }
+    }
+    
+    md5_finish(&s, md);
+    return r;
+}