FreeCalypso > hg > fc-sim-tools
view serial/hexinput.c @ 58:871281cb0555
doc/Low-level-commands: apdu-checksw documented
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Tue, 23 Mar 2021 00:21:02 +0000 |
parents | be27d1c85861 |
children |
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#include <sys/types.h> #include <ctype.h> #include <stdio.h> static decode_hex_digit(c) { if (isdigit(c)) return c - '0'; else if (islower(c)) return c - 'a' + 10; else return c - 'A' + 10; } parse_hex_input(inbuf, outbuf) char *inbuf; u_char *outbuf; { char *cp; unsigned count; count = 0; for (cp = inbuf; ; ) { while (isspace(*cp)) cp++; if (!*cp) break; if (!isxdigit(cp[0]) || !isxdigit(cp[1])) { printf("error: invalid hex APDU input\n"); return(-1); } if (count >= 260) { printf("error: command APDU is too long\n"); return(-1); } outbuf[count++] = (decode_hex_digit(cp[0]) << 4) | decode_hex_digit(cp[1]); cp += 2; } return count; }