diff options
Diffstat (limited to 'scd/iso7816.c')
| -rw-r--r-- | scd/iso7816.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/scd/iso7816.c b/scd/iso7816.c index a0b53f45b..35bf28298 100644 --- a/scd/iso7816.c +++ b/scd/iso7816.c @@ -43,6 +43,7 @@ #define CMD_SELECT_FILE 0xA4 +#define CMD_SELECT_DATA 0xA5 #define CMD_VERIFY ISO7816_VERIFY #define CMD_CHANGE_REFERENCE_DATA ISO7816_CHANGE_REFERENCE_DATA #define CMD_RESET_RETRY_COUNTER ISO7816_RESET_RETRY_COUNTER @@ -445,6 +446,44 @@ iso7816_reset_retry_counter (int slot, int chvno, } +/* Perform a SELECT DATA command to OCCURANCE of TAG. */ +gpg_error_t +iso7816_select_data (int slot, int occurrence, int tag) +{ + int sw; + int datalen; + unsigned char data[7]; + + data[0] = 0x60; + data[2] = 0x5c; + if (tag <= 0xff) + { + data[3] = 1; + data[4] = tag; + datalen = 5; + } + else if (tag <= 0xffff) + { + data[3] = 2; + data[4] = (tag >> 8); + data[5] = tag; + datalen = 6; + } + else + { + data[3] = 3; + data[4] = (tag >> 16); + data[5] = (tag >> 8); + data[6] = tag; + datalen = 7; + } + data[1] = datalen - 2; + + sw = apdu_send_le (slot, 0, 0x00, CMD_SELECT_DATA, + occurrence, 0x04, datalen, data, 0, NULL, NULL); + return map_sw (sw); +} + /* Perform a GET DATA command requesting TAG and storing the result in a newly allocated buffer at the address passed by RESULT. Return |