+/*
+Copyright (c) 2013 Eugene Crosser
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must
+ not claim that you wrote the original software. If you use this
+ software in a product, an acknowledgment in the product documentation
+ would be appreciated but is not required.
+
+ 2. Altered source versions must be plainly marked as such, and must
+ not be misrepresented as being the original software.
+
+ 3. This notice may not be removed or altered from any source
+ distribution.
+*/
+
#ifndef _PCSC_CR_H
#define _PCSC_CR_H
-int pcsc_option(char *option);
-long pcsc_cr(unsigned char *chal, int csize, unsigned char *resp, int *rsize);
+int pcsc_option(const char *option);
+long pcsc_cr(const unsigned char *chal, const int csize,
+ unsigned char *resp, int *rsize);
char *pcsc_errstr(long err);
#endif