1 files changed, 33 insertions, 0 deletions
diff --git a/src/check.c b/src/check.c
index 4c71edd..cf12dd4 100644
--- a/src/check.c
+++ b/src/check.c
@@ -104,6 +104,39 @@ _p11t_check_bool(const char *what, CK_BBOOL value)
 	return CONTINUE;
 }
 
+static int
+atoin (const char *p, int digits)
+{
+	int ret = 0, base = 1;
+	while(--digits >= 0) {
+		if (p[digits] < '0' || p[digits] > '9')
+			return -1;
+		ret += (p[digits] - '0') * base;
+		base *= 10;
+	}
+	return ret;
+}
+
+int
+_p11t_check_date(const char *what, CK_DATE* value)
+{
+	int year, month, day;
+
+	year = atoin((const char*)value->year, 4);
+	month = atoin((const char*)value->month, 2);
+	day = atoin((const char*)value->day, 2);
+
+	if(year < 0 || year > 9999 ||
+	   month < 1 || month > 12 ||
+	   day < 1 || day > 31)
+	{
+		p11t_check_fail("%s: invalid date", what);
+		return STOP;
+	}
+
+	return CONTINUE;
+}
+
 int
 _p11t_check_string(const char *what, CK_UTF8CHAR_PTR value, CK_ULONG length)
 {