X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/90edb255effd0d29d94e662ca5bf3e9eda7ed122..c02f66668d32980a3770e450061c5b96b9f31690:/sbr/ruserpass.c

diff --git a/sbr/ruserpass.c b/sbr/ruserpass.c
index 610f32a5..1d946fa2 100644
--- a/sbr/ruserpass.c
+++ b/sbr/ruserpass.c
@@ -26,6 +26,7 @@
 
 static FILE *cfile;
 
+#define TOK_EOF 0
 #define	DEFAULT	1
 #define	LOGIN	2
 #define	PASSWD	3
@@ -34,7 +35,7 @@ static FILE *cfile;
 #define	ID	10
 #define	MACH	11
 
-#define MAX_TOKVAL_SIZE 1024
+#define MAX_TOKVAL_SIZE 1024 /* Including terminating NUL. */
 
 struct toktab {
     char *tokstr;
@@ -42,6 +43,7 @@ struct toktab {
 };
 
 static struct toktab toktabs[] = {
+    { "",         TOK_EOF },
     { "default",  DEFAULT },
     { "login",    LOGIN },
     { "password", PASSWD },
@@ -105,8 +107,8 @@ ruserpass(const char *host, char **aname, char **apass, int flags)
 			    (stb.st_mode & 077) != 0) {
 			    /* We make this a fatal error to force the
 			       user to correct it. */
-			    advise(NULL, "Error - file %s must not be world or "
-				   "group readable.", credentials_file);
+                            advise(NULL, "group or other permissions, %#o, "
+                                "forbidden: %s", stb.st_mode, credentials_file);
 			    adios(NULL, "Remove password or correct file "
 				  "permissions.");
 			}
@@ -145,7 +147,7 @@ ruserpass(const char *host, char **aname, char **apass, int flags)
 	}
 	printf("Name (%s:%s): ", host, myname);
 
-	if (fgets(tmp, sizeof(tmp) - 1, stdin) == NULL) {
+	if (fgets(tmp, sizeof tmp, stdin) == NULL) {
 	    advise ("tmp", "fgets");
 	}
         TrimSuffixC(tmp, '\n');
@@ -175,46 +177,47 @@ ruserpass(const char *host, char **aname, char **apass, int flags)
 static int
 token(char *tokval)
 {
-    char *cp;
     int c;
+    const char normalStop[] = "\t\n ,"; /* Each breaks a word. */
+    const char *stop;
+    char *cp;
     struct toktab *t;
 
-    if (feof(cfile))
-	return (0);
-    while ((c = getc(cfile)) != EOF &&
-	   (c == '\n' || c == '\t' || c == ' ' || c == ','))
-	continue;
+    if (feof(cfile) || ferror(cfile))
+	return TOK_EOF;
+
+    stop = normalStop;
+    while ((c = getc(cfile)) != EOF && c && strchr(stop, c))
+        ;
     if (c == EOF)
-	return (0);
+	return TOK_EOF;
+
     cp = tokval;
-    if (c == '"') {
-	while ((c = getc(cfile)) != EOF && c != '"') {
-	    if (c == '\\')
-		c = getc(cfile);
-	    *cp++ = c;
-            if (cp - tokval > MAX_TOKVAL_SIZE-1) {
-                adios(NULL, "credential tokens restricted to length %d",
-                      MAX_TOKVAL_SIZE - 1);
-            }
-	}
-    } else {
-	*cp++ = c;
-	while ((c = getc(cfile)) != EOF
-	       && c != '\n' && c != '\t' && c != ' ' && c != ',') {
-	    if (c == '\\')
-		c = getc(cfile);
-	    *cp++ = c;
-            if (cp - tokval > MAX_TOKVAL_SIZE-1) {
-                adios(NULL, "credential tokens restricted to length %d",
-                      MAX_TOKVAL_SIZE - 1);
-            }
-	}
+    if (c == '"')
+        /* FIXME: Where is the quoted-string syntax of netrc documented?
+         * This code treats «"foo""bar"» as two tokens without further
+         * separators. */
+        stop = "\"";
+    else
+        /* Might be backslash.  Get it again later.  It's handled then. */
+        if (ungetc(c, cfile) == EOF)
+            return TOK_EOF;
+
+    while ((c = getc(cfile)) != EOF && c && !strchr(stop, c)) {
+        if (c == '\\' && (c = getc(cfile)) == EOF)
+            return TOK_EOF; /* Discard whole token. */
+
+        *cp++ = c;
+        if (cp - tokval > MAX_TOKVAL_SIZE-1) {
+            adios(NULL, "credential tokens restricted to length %d",
+                  MAX_TOKVAL_SIZE - 1);
+        }
     }
-    *cp = 0;
-    if (tokval[0] == 0)
-	return (0);
+    *cp = '\0';
+
     for (t = toktabs; t->tokstr; t++)
 	if (!strcmp(t->tokstr, tokval))
 	    return (t->tval);
+
     return (ID);
 }