diff options
Diffstat (limited to 'scd/iso7816.c')
| -rw-r--r-- | scd/iso7816.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/scd/iso7816.c b/scd/iso7816.c index c878a03c0..941b68d38 100644 --- a/scd/iso7816.c +++ b/scd/iso7816.c @@ -56,6 +56,7 @@ #define CMD_GET_CHALLENGE 0x84 #define CMD_READ_BINARY 0xB0 #define CMD_READ_RECORD 0xB2 +#define CMD_UPDATE_BINARY 0xD6 static gpg_error_t map_sw (int sw) @@ -1025,6 +1026,7 @@ iso7816_read_record_ext (int slot, int recno, int reccount, int short_ef, return 0; } + gpg_error_t iso7816_read_record (int slot, int recno, int reccount, int short_ef, unsigned char **result, size_t *resultlen) @@ -1032,3 +1034,23 @@ iso7816_read_record (int slot, int recno, int reccount, int short_ef, return iso7816_read_record_ext (slot, recno, reccount, short_ef, result, resultlen, NULL); } + + +/* Perform an UPDATE BINARY command on card in SLOT. Write DATA of + * length DATALEN to a transparent file at OFFSET. */ +gpg_error_t +iso7816_update_binary (int slot, int extended_mode, size_t offset, + const void *data, size_t datalen) +{ + int sw; + + /* We can only encode 15 bits in p0,p1 to indicate an offset. Thus + * we check for this limit. */ + if (offset > 32767) + return gpg_error (GPG_ERR_INV_VALUE); + + sw = apdu_send_simple (slot, extended_mode, 0x00, CMD_UPDATE_BINARY, + ((offset>>8) & 0xff), (offset & 0xff), + datalen, (const char*)data); + return map_sw (sw); +} |