diff options
Diffstat (limited to 'firmware/src')
| -rw-r--r-- | firmware/src/simtrace/iso7816_uart.c | 160 |
1 files changed, 148 insertions, 12 deletions
diff --git a/firmware/src/simtrace/iso7816_uart.c b/firmware/src/simtrace/iso7816_uart.c index 18335f6..12669c4 100644 --- a/firmware/src/simtrace/iso7816_uart.c +++ b/firmware/src/simtrace/iso7816_uart.c @@ -43,6 +43,7 @@ enum iso7816_3_state { ISO7816_S_IN_ATR, /* while we are receiving the ATR */ ISO7816_S_WAIT_APDU, /* waiting for start of new APDU */ ISO7816_S_IN_APDU, /* inside a single APDU */ + ISO7816_S_IN_PTS, /* while we are inside the PTS / PSS */ }; /* detailed sub-states of ISO7816_S_IN_ATR */ @@ -58,6 +59,29 @@ enum atr_state { ATR_S_DONE, }; +/* detailed sub-states of ISO7816_S_IN_PTS */ +enum pts_state { + PTS_S_WAIT_REQ_PTSS, + PTS_S_WAIT_REQ_PTS0, + PTS_S_WAIT_REQ_PTS1, + PTS_S_WAIT_REQ_PTS2, + PTS_S_WAIT_REQ_PTS3, + PTS_S_WAIT_REQ_PCK, + PTS_S_WAIT_RESP_PTSS = PTS_S_WAIT_REQ_PTSS | 0x10, + PTS_S_WAIT_RESP_PTS0 = PTS_S_WAIT_REQ_PTS0 | 0x10, + PTS_S_WAIT_RESP_PTS1 = PTS_S_WAIT_REQ_PTS1 | 0x10, + PTS_S_WAIT_RESP_PTS2 = PTS_S_WAIT_REQ_PTS2 | 0x10, + PTS_S_WAIT_RESP_PTS3 = PTS_S_WAIT_REQ_PTS3 | 0x10, + PTS_S_WAIT_RESP_PCK = PTS_S_WAIT_REQ_PCK | 0x10, +}; + +#define _PTSS 0 +#define _PTS0 1 +#define _PTS1 2 +#define _PTS2 3 +#define _PTS3 4 +#define _PCK 5 + struct iso7816_3_handle { enum iso7816_3_state state; @@ -66,12 +90,16 @@ struct iso7816_3_handle { u_int8_t wi; u_int32_t waiting_time; + enum atr_state atr_state; u_int8_t atr_idx; u_int8_t atr_hist_len; u_int8_t atr_last_td; - enum atr_state atr_state; u_int8_t atr[64]; + enum pts_state pts_state; + u_int8_t pts_req[6]; + u_int8_t pts_resp[6]; + struct simtrace_hdr sh; struct req_ctx *rctx; @@ -215,7 +243,7 @@ static void set_state(struct iso7816_3_handle *ih, enum iso7816_3_state new_stat if (ih->state == new_state) return; - DEBUGPCR("7816 state %u -> %u", ih->state, new_state); + //DEBUGPCR("7816 state %u -> %u", ih->state, new_state); ih->state = new_state; } @@ -236,12 +264,6 @@ static enum atr_state next_intb_state(struct iso7816_3_handle *ih, u_int8_t ch) case ATR_S_WAIT_TB: goto from_tb; case ATR_S_WAIT_TA: - if ((ih->atr_last_td & 0x0f) == 0) { - /* This must be TA1 */ - ih->fi = ch >> 4; - ih->di = ch & 0xf; - DEBUGPCR("found Fi=%u Di=%u", ih->fi, ih->di); - } goto from_ta; default: DEBUGPCR("something wrong, old_state != TA"); @@ -268,8 +290,6 @@ from_tc: static enum iso7816_3_state process_byte_atr(struct iso7816_3_handle *ih, u_int8_t byte) { - int rc; - /* add byte to ATR buffer */ ih->atr[ih->atr_idx] = byte; ih->atr_idx++; @@ -305,8 +325,6 @@ process_byte_atr(struct iso7816_3_handle *ih, u_int8_t byte) case ATR_S_WAIT_TCK: /* FIXME: process and verify the TCK */ set_atr_state(ih, ATR_S_DONE); - /* update baud rate generator with Fi/Di */ - update_fidi(ih); /* update the waiting time */ ih->waiting_time = 960 * di_table[ih->di] * ih->wi; tc_etu_set_wtime(ih->waiting_time); @@ -316,6 +334,113 @@ process_byte_atr(struct iso7816_3_handle *ih, u_int8_t byte) return ISO7816_S_IN_ATR; } +/* Update the ATR sub-state */ +static void set_pts_state(struct iso7816_3_handle *ih, enum pts_state new_ptss) +{ + //DEBUGPCR("PTS state %u -> %u", ih->pts_state, new_ptss); + ih->pts_state = new_ptss; +} + +/* Determine the next PTS state */ +static enum pts_state next_pts_state(struct iso7816_3_handle *ih) +{ + u_int8_t is_resp = ih->pts_state & 0x10; + u_int8_t sstate = ih->pts_state & 0x0f; + u_int8_t *pts_ptr; + + if (!is_resp) + pts_ptr = ih->pts_req; + else + pts_ptr = ih->pts_resp; + + switch (sstate) { + case PTS_S_WAIT_REQ_PTSS: + goto from_ptss; + case PTS_S_WAIT_REQ_PTS0: + goto from_pts0; + case PTS_S_WAIT_REQ_PTS1: + goto from_pts1; + case PTS_S_WAIT_REQ_PTS2: + goto from_pts2; + case PTS_S_WAIT_REQ_PTS3: + goto from_pts3; + } + + if (ih->pts_state == PTS_S_WAIT_REQ_PCK) + return PTS_S_WAIT_RESP_PTSS; + +from_ptss: + return PTS_S_WAIT_REQ_PTS0 | is_resp; +from_pts0: + if (pts_ptr[_PTS0] & (1 << 4)) + return PTS_S_WAIT_REQ_PTS1 | is_resp; +from_pts1: + if (pts_ptr[_PTS0] & (1 << 5)) + return PTS_S_WAIT_REQ_PTS2 | is_resp; +from_pts2: + if (pts_ptr[_PTS0] & (1 << 6)) + return PTS_S_WAIT_REQ_PTS3 | is_resp; +from_pts3: + return PTS_S_WAIT_REQ_PCK | is_resp; +} + +static enum iso7816_3_state +process_byte_pts(struct iso7816_3_handle *ih, u_int8_t byte) +{ + switch (ih->pts_state) { + case PTS_S_WAIT_REQ_PTSS: + ih->pts_req[_PTSS] = byte; + break; + case PTS_S_WAIT_REQ_PTS0: + ih->pts_req[_PTS0] = byte; + break; + case PTS_S_WAIT_REQ_PTS1: + ih->pts_req[_PTS1] = byte; + break; + case PTS_S_WAIT_REQ_PTS2: + ih->pts_req[_PTS2] = byte; + break; + case PTS_S_WAIT_REQ_PTS3: + ih->pts_req[_PTS3] = byte; + break; + case PTS_S_WAIT_REQ_PCK: + /* FIXME: check PCK */ + ih->pts_req[_PCK] = byte; + break; + case PTS_S_WAIT_RESP_PTSS: + ih->pts_resp[_PTSS] = byte; + break; + case PTS_S_WAIT_RESP_PTS0: + ih->pts_resp[_PTS0] = byte; + break; + case PTS_S_WAIT_RESP_PTS1: + /* This must be TA1 */ + ih->fi = byte >> 4; + ih->di = byte & 0xf; + DEBUGPCR("found Fi=%u Di=%u", ih->fi, ih->di); + ih->pts_resp[_PTS1] = byte; + break; + case PTS_S_WAIT_RESP_PTS2: + ih->pts_resp[_PTS2] = byte; + break; + case PTS_S_WAIT_RESP_PTS3: + ih->pts_resp[_PTS3] = byte; + break; + case PTS_S_WAIT_RESP_PCK: + ih->pts_resp[_PCK] = byte; + /* FIXME: check PCK */ + set_pts_state(ih, PTS_S_WAIT_REQ_PTSS); + /* update baud rate generator with Fi/Di */ + update_fidi(ih); + /* Wait for the next APDU */ + return ISO7816_S_WAIT_APDU; + } + /* calculate the next state and set it */ + set_pts_state(ih, next_pts_state(ih)); + + return ISO7816_S_IN_PTS; +} + static void process_byte(struct iso7816_3_handle *ih, u_int8_t byte) { int new_state = -1; @@ -332,9 +457,16 @@ static void process_byte(struct iso7816_3_handle *ih, u_int8_t byte) new_state = process_byte_atr(ih, byte); break; case ISO7816_S_WAIT_APDU: + if (byte == 0xff) { + new_state = process_byte_pts(ih, byte); + goto out_silent; + } case ISO7816_S_IN_APDU: new_state = ISO7816_S_IN_APDU; break; + case ISO7816_S_IN_PTS: + new_state = process_byte_pts(ih, byte); + goto out_silent; } rctx = ih->rctx; @@ -350,6 +482,7 @@ static void process_byte(struct iso7816_3_handle *ih, u_int8_t byte) if (rctx->tot_len >= rctx->size) send_rctx(ih); +out_silent: if (new_state != -1) set_state(ih, new_state); } @@ -362,6 +495,9 @@ void iso7816_wtime_expired(void) isoh.sh.flags |= SIMTRACE_FLAG_WTIME_EXP; send_rctx(&isoh); } + if (isoh.state == ISO7816_S_IN_PTS) { + /* Timout during PTS: Card does not support PTS */ + } set_state(&isoh, ISO7816_S_WAIT_APDU); } |