FreeCalypso > hg > fc-sim-tools
view libutil/alpha_valid.c @ 93:6041c601304d
fcsim1-mkprov: revert OTA key addition
It appears that GrcardSIM2 cards (which is what we got for FCSIM1)
do not support OTA after all, contrary to what we were previously
led to believe by some tech support emails from Grcard - apparently
those support emails and OTA descriptions referred to some other
card model(s).
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Wed, 21 Apr 2021 05:38:39 +0000 |
parents | 34bbb0585cab |
children |
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/* * This module contains functions for validating alpha fields * that exist in various SIM files. */ #include <sys/types.h> #include <string.h> #include <strings.h> #include <stdio.h> #include <stdlib.h> static validate_classic_gsm(data, nbytes, textlenp) u_char *data; unsigned nbytes, *textlenp; { u_char *dp; unsigned n; dp = data; for (n = 0; n < nbytes; n++) { if (*dp == 0xFF) break; if (*dp & 0x80) return(-1); dp++; } if (textlenp) *textlenp = n; for (; n < nbytes; n++) if (*dp++ != 0xFF) return(-1); return(0); } static validate_ucs2_80(data, nbytes, textlenp) u_char *data; unsigned nbytes, *textlenp; { u_char *dp, *endp; if (nbytes < 3) return(-1); dp = data + 1; endp = data + nbytes; while (dp < endp) { if (dp + 1 == endp) { if (*dp != 0xFF) return(-1); if (textlenp) *textlenp = dp - data; return(0); } if (dp[0] == 0xFF && dp[1] == 0xFF) break; dp += 2; } if (textlenp) *textlenp = dp - data; while (dp < endp) if (*dp++ != 0xFF) return(-1); return(0); } static validate_ucs2_81(data, nbytes, textlenp) u_char *data; unsigned nbytes, *textlenp; { u_char *dp, *endp; unsigned textlen; if (nbytes < 4) return(-1); if (!data[1]) return(-1); textlen = data[1] + 3; if (textlen > nbytes) return(-1); if (textlenp) *textlenp = textlen; dp = data + textlen; endp = data + nbytes; while (dp < endp) if (*dp++ != 0xFF) return(-1); return(0); } static validate_ucs2_82(data, nbytes, textlenp) u_char *data; unsigned nbytes, *textlenp; { u_char *dp, *endp; unsigned textlen; if (nbytes < 5) return(-1); if (!data[1]) return(-1); textlen = data[1] + 4; if (textlen > nbytes) return(-1); if (textlenp) *textlenp = textlen; dp = data + textlen; endp = data + nbytes; while (dp < endp) if (*dp++ != 0xFF) return(-1); return(0); } static validate_empty(data, nbytes, textlenp) u_char *data; unsigned nbytes, *textlenp; { u_char *dp; unsigned n; dp = data; for (n = 0; n < nbytes; n++) if (*dp++ != 0xFF) return(-1); if (textlenp) *textlenp = 0; return(0); } validate_alpha_field(data, nbytes, textlenp) u_char *data; unsigned nbytes, *textlenp; { if (data[0] < 0x80) return validate_classic_gsm(data, nbytes, textlenp); switch (data[0]) { case 0x80: return validate_ucs2_80(data, nbytes, textlenp); case 0x81: return validate_ucs2_81(data, nbytes, textlenp); case 0x82: return validate_ucs2_82(data, nbytes, textlenp); case 0xFF: return validate_empty(data, nbytes, textlenp); default: return -1; } }