diff options
| -rw-r--r-- | pySim/utils.py | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/pySim/utils.py b/pySim/utils.py index 51f2954..be670e9 100644 --- a/pySim/utils.py +++ b/pySim/utils.py @@ -347,3 +347,34 @@ def parse_st(st): avail_srvc.append((8*i) + j) byte = byte >> 1 return avail_srvc + +def dec_st(st, table="sim"): + """ + Parses the EF S/U/IST and prints the list of available services in EF S/U/IST + """ + + if table == "usim": + from pySim.ts_31_102 import EF_UST_map + lookup_map = EF_UST_map + else: + from pySim.ts_51_011 import EF_SST_map + lookup_map = EF_SST_map + + st_bytes = [st[i:i+2] for i in range(0, len(st), 2) ] + + avail_st = "" + # Get each byte and check for available services + for i in range(0, len(st_bytes)): + # Byte i contains info about Services num (8i+1) to num (8i+8) + byte = int(st_bytes[i], 16) + # Services in each byte are in order MSB to LSB + # MSB - Service (8i+8) + # LSB - Service (8i+1) + for j in range(1, 9): + if byte&0x01 == 0x01 and ((8*i) + j in lookup_map): + # Byte X contains info about Services num (8X-7) to num (8X) + # bit = 1: service available + # bit = 0: service not available + avail_st += '\tService %d - %s\n' % ((8*i) + j, lookup_map[(8*i) + j]) + byte = byte >> 1 + return avail_st |