mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-21 07:46:12 +08:00
CHG: Syntax suger, space -> tabs. etc.
FIX: Coverity Scan says out-of-bounds, Increased the databuffer. Legic List command needs to be re-done.
This commit is contained in:
iceman1001
parent
5f5aa82bb9
commit
52cf34c1cc
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@ -19,31 +19,6 @@
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#include "util.h"
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static int CmdHelp(const char *Cmd);
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static command_t CommandTable[] =
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{
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{"help", CmdHelp, 1, "This help"},
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{"decode", CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"},
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{"reader", CmdLegicRFRead, 0, "[offset [length]] -- read bytes from a LEGIC card"},
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{"save", CmdLegicSave, 0, "<filename> [<length>] -- Store samples"},
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{"load", CmdLegicLoad, 0, "<filename> -- Restore samples"},
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{"sim", CmdLegicRfSim, 0, "[phase drift [frame drift [req/resp drift]]] Start tag simulator (use after load or read)"},
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{"write", CmdLegicRfWrite,0, "<offset> <length> -- Write sample buffer (user after load or read)"},
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{"fill", CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
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{NULL, NULL, 0, NULL}
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};
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int CmdHFLegic(const char *Cmd)
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{
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CmdsParse(CommandTable, Cmd);
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return 0;
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}
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int CmdHelp(const char *Cmd)
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{
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CmdsHelp(CommandTable);
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return 0;
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}
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/*
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* Output BigBuf and deobfuscate LEGIC RF tag data.
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* This is based on information given in the talk held
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@ -51,177 +26,162 @@ int CmdHelp(const char *Cmd)
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*/
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int CmdLegicDecode(const char *Cmd)
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{
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int i, j, k, n;
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int segment_len = 0;
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int segment_flag = 0;
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int stamp_len = 0;
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int crc = 0;
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int wrp = 0;
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int wrc = 0;
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uint8_t data_buf[1053]; // receiver buffer
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char out_string[3076]; // just use big buffer - bad practice
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char token_type[4];
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// copy data from proxmark into buffer
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GetFromBigBuf(data_buf,sizeof(data_buf),0);
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WaitForResponse(CMD_ACK,NULL);
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// Output CDF System area (9 bytes) plus remaining header area (12 bytes)
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PrintAndLog("\nCDF: System Area");
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PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x",
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data_buf[0],
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data_buf[1],
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data_buf[2],
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data_buf[3],
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data_buf[4]
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);
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crc = data_buf[4];
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int i, j, k, n;
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int segment_len = 0;
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int segment_flag = 0;
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int stamp_len = 0;
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int crc = 0;
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int wrp = 0;
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int wrc = 0;
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uint8_t data_buf[3076]; // receiver buffer
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char out_string[3076]; // just use big buffer - bad practice
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char token_type[4];
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// copy data from proxmark into buffer
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GetFromBigBuf(data_buf,sizeof(data_buf),0);
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WaitForResponse(CMD_ACK,NULL);
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// Output CDF System area (9 bytes) plus remaining header area (12 bytes)
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PrintAndLog("\nCDF: System Area");
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PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x",
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data_buf[0],
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data_buf[1],
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data_buf[2],
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data_buf[3],
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data_buf[4]
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);
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crc = data_buf[4];
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switch (data_buf[5]&0x7f) {
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case 0x00 ... 0x2f:
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strncpy(token_type, "IAM",sizeof(token_type));
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break;
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case 0x30 ... 0x6f:
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strcpy(token_type, "SAM");
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break;
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case 0x70 ... 0x7f:
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strcpy(token_type, "GAM");
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break;
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default:
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strcpy(token_type, "???");
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break;
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}
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switch (data_buf[5]&0x7f) {
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case 0x00 ... 0x2f:
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strncpy(token_type, "IAM",sizeof(token_type));
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break;
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case 0x30 ... 0x6f:
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strcpy(token_type, "SAM");
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break;
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case 0x70 ... 0x7f:
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strcpy(token_type, "GAM");
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break;
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default:
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strcpy(token_type, "???");
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break;
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}
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stamp_len = 0xfc - data_buf[6];
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PrintAndLog("DCF: %02x %02x, Token_Type=%s (OLE=%01u), Stamp_len=%02u",
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data_buf[5],
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data_buf[6],
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token_type,
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(data_buf[5]&0x80)>>7,
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stamp_len
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);
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PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, raw=%02x, SSC=%02x",
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data_buf[7]&0x0f,
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(data_buf[7]&0x70)>>4,
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(data_buf[7]&0x80)>>7,
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data_buf[7],
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data_buf[8]
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);
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PrintAndLog("Remaining Header Area");
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PrintAndLog("%s", sprint_hex(data_buf+9, 13));
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PrintAndLog("\nADF: User Area");
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stamp_len = 0xfc - data_buf[6];
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PrintAndLog("DCF: %02x %02x, Token_Type=%s (OLE=%01u), Stamp_len=%02u",
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data_buf[5],
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data_buf[6],
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token_type,
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(data_buf[5]&0x80)>>7,
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stamp_len
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);
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PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, raw=%02x, SSC=%02x",
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data_buf[7]&0x0f,
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(data_buf[7]&0x70)>>4,
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(data_buf[7]&0x80)>>7,
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data_buf[7],
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data_buf[8]
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);
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PrintAndLog("Remaining Header Area");
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PrintAndLog("%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
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data_buf[9],
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data_buf[10],
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data_buf[11],
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data_buf[12],
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data_buf[13],
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data_buf[14],
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data_buf[15],
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data_buf[16],
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data_buf[17],
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data_buf[18],
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data_buf[19],
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data_buf[20],
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data_buf[21]
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);
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PrintAndLog("\nADF: User Area");
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i = 22;
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for (n=0; n<64; n++) {
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segment_len = ((data_buf[i+1]^crc)&0x0f) * 256 + (data_buf[i]^crc);
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segment_flag = ((data_buf[i+1]^crc)&0xf0)>>4;
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i = 22;
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for ( n=0; n<64; n++ ) {
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segment_len = ((data_buf[i+1]^crc)&0x0f) * 256 + (data_buf[i]^crc);
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segment_flag = ((data_buf[i+1]^crc)&0xf0)>>4;
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wrp = (data_buf[i+2]^crc);
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wrc = ((data_buf[i+3]^crc)&0x70)>>4;
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PrintAndLog("Segment %02u: raw header=%02x %02x %02x %02x, flag=%01x (valid=%01u, last=%01u), len=%04u, WRP=%02u, WRC=%02u, RD=%01u, CRC=%02x",
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n,
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data_buf[i]^crc,
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data_buf[i+1]^crc,
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data_buf[i+2]^crc,
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data_buf[i+3]^crc,
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segment_flag,
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(segment_flag&0x4)>>2,
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(segment_flag&0x8)>>3,
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segment_len,
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wrp,
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wrc,
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((data_buf[i+3]^crc)&0x80)>>7,
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(data_buf[i+4]^crc)
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);
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i+=5;
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wrp = (data_buf[i+2]^crc);
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wrc = ((data_buf[i+3]^crc)&0x70)>>4;
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if ( wrc>0 ) {
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PrintAndLog("WRC protected area:");
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for ( k=0, j=0; k < wrc && j<(sizeof(out_string)-3); k++, i++, j += 3) {
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sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
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out_string[j+2] = ' ';
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}
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out_string[j] = '\0';
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PrintAndLog("%s", out_string);
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}
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PrintAndLog("Segment %02u: raw header=%02x %02x %02x %02x, flag=%01x (valid=%01u, last=%01u), len=%04u, WRP=%02u, WRC=%02u, RD=%01u, CRC=%02x",
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n,
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data_buf[i]^crc,
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data_buf[i+1]^crc,
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data_buf[i+2]^crc,
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data_buf[i+3]^crc,
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segment_flag,
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(segment_flag&0x4)>>2,
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(segment_flag&0x8)>>3,
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segment_len,
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wrp,
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wrc,
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((data_buf[i+3]^crc)&0x80)>>7,
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(data_buf[i+4]^crc)
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);
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if ( wrp>wrc ) {
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PrintAndLog("Remaining write protected area:");
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for (k=0, j=0; k < (wrp-wrc) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
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sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
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out_string[j+2] = ' ';
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};
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out_string[j] = '\0';
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PrintAndLog("%s", out_string);
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if( (wrp-wrc) == 8 ) {
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sprintf(out_string, "Card ID: %2X%02X%02X", data_buf[i-4]^crc, data_buf[i-3]^crc, data_buf[i-2]^crc);
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PrintAndLog("%s", out_string);
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}
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}
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i+=5;
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PrintAndLog("Remaining segment payload:");
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for ( k=0, j=0; k < (segment_len - wrp - 5) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
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sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
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out_string[j+2] = ' ';
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};
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if (wrc>0) {
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PrintAndLog("WRC protected area:");
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for (k=0, j=0; k < wrc && j<(sizeof(out_string)-3); k++, i++, j += 3) {
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sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
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out_string[j+2] = ' ';
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};
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out_string[j] = '\0';
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out_string[j] = '\0';
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PrintAndLog("%s", out_string);
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}
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PrintAndLog("%s", out_string);
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if (wrp>wrc) {
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PrintAndLog("Remaining write protected area:");
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for (k=0, j=0; k < (wrp-wrc) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
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sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
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out_string[j+2] = ' ';
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};
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out_string[j] = '\0';
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PrintAndLog("%s", out_string);
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if((wrp-wrc) == 8) {
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sprintf(out_string,"Card ID: %2X%02X%02X",data_buf[i-4]^crc,data_buf[i-3]^crc,data_buf[i-2]^crc);
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PrintAndLog("%s", out_string);
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}
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}
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PrintAndLog("Remaining segment payload:");
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for (k=0, j=0; k < (segment_len - wrp - 5) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
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sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
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out_string[j+2] = ' ';
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};
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out_string[j] = '\0';
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PrintAndLog("%s", out_string);
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// end with last segment
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if (segment_flag & 0x8)
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return 0;
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};
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return 0;
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// end with last segment
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if (segment_flag & 0x8) return 0;
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} // end for loop
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return 0;
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}
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int CmdLegicRFRead(const char *Cmd)
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{
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int byte_count=0,offset=0;
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sscanf(Cmd, "%i %i", &offset, &byte_count);
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if(byte_count == 0) byte_count = -1;
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if(byte_count + offset > 1024) byte_count = 1024 - offset;
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UsbCommand c={CMD_READER_LEGIC_RF, {offset, byte_count, 0}};
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SendCommand(&c);
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return 0;
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int CmdLegicRFRead(const char *Cmd) {
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int byte_count=0, offset=0;
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sscanf(Cmd, "%i %i", &offset, &byte_count);
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if(byte_count == 0) byte_count = -1;
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if(byte_count + offset > 1024) byte_count = 1024 - offset;
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UsbCommand c= {CMD_READER_LEGIC_RF, {offset, byte_count, 0}};
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clearCommandBuffer();
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SendCommand(&c);
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return 0;
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}
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int CmdLegicLoad(const char *Cmd)
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{
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int CmdLegicLoad(const char *Cmd) {
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char filename[FILE_PATH_SIZE] = {0x00};
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int len = 0;
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if (param_getchar(Cmd, 0) == 'h' || param_getchar(Cmd, 0)== 0x00) {
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char cmdp = param_getchar(Cmd, 0);
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if ( cmdp == 'H' || cmdp == 'h' || cmdp == 0x00) {
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PrintAndLog("It loads datasamples from the file `filename`");
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PrintAndLog("Usage: hf legic load <file name>");
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PrintAndLog(" sample: hf legic load filename");
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@ -240,8 +200,12 @@ int CmdLegicLoad(const char *Cmd)
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PrintAndLog("couldn't open '%s'", Cmd);
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return -1;
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}
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char line[80]; int offset = 0; unsigned int data[8];
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while(fgets(line, sizeof(line), f)) {
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char line[80];
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int offset = 0, j;
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uint32_t data[8] = {0x00};
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while ( fgets(line, sizeof(line), f) ) {
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int res = sscanf(line, "%x %x %x %x %x %x %x %x",
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&data[0], &data[1], &data[2], &data[3],
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&data[4], &data[5], &data[6], &data[7]);
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@ -250,10 +214,12 @@ int CmdLegicLoad(const char *Cmd)
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fclose(f);
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return -1;
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}
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UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}};
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int j; for(j = 0; j < 8; j++) {
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UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}};
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for( j = 0; j < 8; j++) {
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c.d.asBytes[j] = data[j];
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}
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SendCommand(&c);
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WaitForResponse(CMD_ACK, NULL);
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offset += 8;
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@ -263,86 +229,82 @@ int CmdLegicLoad(const char *Cmd)
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return 0;
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}
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int CmdLegicSave(const char *Cmd)
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{
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int requested = 1024;
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int offset = 0;
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int delivered = 0;
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char filename[FILE_PATH_SIZE];
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uint8_t got[1024];
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sscanf(Cmd, " %s %i %i", filename, &requested, &offset);
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int CmdLegicSave(const char *Cmd) {
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int requested = 1024;
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int offset = 0;
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int delivered = 0;
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char filename[FILE_PATH_SIZE];
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uint8_t got[1024] = {0x00};
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/* If no length given save entire legic read buffer */
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/* round up to nearest 8 bytes so the saved data can be used with legicload */
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if (requested == 0) {
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requested = 1024;
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}
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if (requested % 8 != 0) {
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int remainder = requested % 8;
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requested = requested + 8 - remainder;
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}
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if (offset + requested > sizeof(got)) {
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PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 1024");
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return 0;
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}
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FILE *f = fopen(filename, "w");
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if(!f) {
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PrintAndLog("couldn't open '%s'", Cmd+1);
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return -1;
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}
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sscanf(Cmd, " %s %i %i", filename, &requested, &offset);
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GetFromBigBuf(got,requested,offset);
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WaitForResponse(CMD_ACK,NULL);
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/* If no length given save entire legic read buffer */
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/* round up to nearest 8 bytes so the saved data can be used with legicload */
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if (requested == 0) {
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requested = 1024;
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}
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for (int j = 0; j < requested; j += 8) {
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fprintf(f, "%02x %02x %02x %02x %02x %02x %02x %02x\n",
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got[j+0],
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got[j+1],
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got[j+2],
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got[j+3],
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got[j+4],
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got[j+5],
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got[j+6],
|
||||
got[j+7]
|
||||
);
|
||||
delivered += 8;
|
||||
if (delivered >= requested)
|
||||
break;
|
||||
}
|
||||
if (requested % 8 != 0) {
|
||||
int remainder = requested % 8;
|
||||
requested = requested + 8 - remainder;
|
||||
}
|
||||
|
||||
fclose(f);
|
||||
PrintAndLog("saved %u samples", delivered);
|
||||
return 0;
|
||||
if (offset + requested > sizeof(got)) {
|
||||
PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 1024");
|
||||
return 0;
|
||||
}
|
||||
|
||||
FILE *f = fopen(filename, "w");
|
||||
if(!f) {
|
||||
PrintAndLog("couldn't open '%s'", Cmd+1);
|
||||
return -1;
|
||||
}
|
||||
|
||||
GetFromBigBuf(got,requested,offset);
|
||||
WaitForResponse(CMD_ACK,NULL);
|
||||
|
||||
for (int j = 0; j < requested; j += 8) {
|
||||
fprintf(f, "%02x %02x %02x %02x %02x %02x %02x %02x\n",
|
||||
got[j+0],
|
||||
got[j+1],
|
||||
got[j+2],
|
||||
got[j+3],
|
||||
got[j+4],
|
||||
got[j+5],
|
||||
got[j+6],
|
||||
got[j+7]
|
||||
);
|
||||
delivered += 8;
|
||||
if (delivered >= requested) break;
|
||||
}
|
||||
|
||||
fclose(f);
|
||||
PrintAndLog("saved %u samples", delivered);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int CmdLegicRfSim(const char *Cmd)
|
||||
{
|
||||
UsbCommand c={CMD_SIMULATE_TAG_LEGIC_RF};
|
||||
c.arg[0] = 6;
|
||||
c.arg[1] = 3;
|
||||
c.arg[2] = 0;
|
||||
sscanf(Cmd, " %"lli" %"lli" %"lli, &c.arg[0], &c.arg[1], &c.arg[2]);
|
||||
SendCommand(&c);
|
||||
return 0;
|
||||
int CmdLegicRfSim(const char *Cmd) {
|
||||
UsbCommand c= {CMD_SIMULATE_TAG_LEGIC_RF, {6,3,0}};
|
||||
sscanf(Cmd, " %"lli" %"lli" %"lli, &c.arg[0], &c.arg[1], &c.arg[2]);
|
||||
clearCommandBuffer();
|
||||
SendCommand(&c);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int CmdLegicRfWrite(const char *Cmd)
|
||||
{
|
||||
UsbCommand c={CMD_WRITER_LEGIC_RF};
|
||||
int CmdLegicRfWrite(const char *Cmd) {
|
||||
UsbCommand c = {CMD_WRITER_LEGIC_RF};
|
||||
int res = sscanf(Cmd, " 0x%"llx" 0x%"llx, &c.arg[0], &c.arg[1]);
|
||||
if(res != 2) {
|
||||
PrintAndLog("Please specify the offset and length as two hex strings");
|
||||
return -1;
|
||||
}
|
||||
clearCommandBuffer();
|
||||
SendCommand(&c);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int CmdLegicRfFill(const char *Cmd)
|
||||
{
|
||||
UsbCommand cmd ={CMD_WRITER_LEGIC_RF};
|
||||
int CmdLegicRfFill(const char *Cmd) {
|
||||
UsbCommand cmd = {CMD_WRITER_LEGIC_RF};
|
||||
int res = sscanf(Cmd, " 0x%"llx" 0x%"llx" 0x%"llx, &cmd.arg[0], &cmd.arg[1], &cmd.arg[2]);
|
||||
if(res != 3) {
|
||||
PrintAndLog("Please specify the offset, length and value as two hex strings");
|
||||
|
|
@ -350,16 +312,40 @@ int CmdLegicRfFill(const char *Cmd)
|
|||
}
|
||||
|
||||
int i;
|
||||
UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {0, 0, 0}};
|
||||
UsbCommand c = {CMD_DOWNLOADED_SIM_SAMPLES_125K, {0, 0, 0}};
|
||||
for(i = 0; i < 48; i++) {
|
||||
c.d.asBytes[i] = cmd.arg[2];
|
||||
}
|
||||
for(i = 0; i < 22; i++) {
|
||||
c.arg[0] = i*48;
|
||||
SendCommand(&c);
|
||||
WaitForResponse(CMD_ACK,NULL);
|
||||
c.d.asBytes[i] = cmd.arg[2];
|
||||
}
|
||||
|
||||
for(i = 0; i < 22; i++) {
|
||||
c.arg[0] = i*48;
|
||||
SendCommand(&c);
|
||||
WaitForResponse(CMD_ACK,NULL);
|
||||
}
|
||||
clearCommandBuffer();
|
||||
SendCommand(&cmd);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static command_t CommandTable[] = {
|
||||
{"help", CmdHelp, 1, "This help"},
|
||||
{"decode", CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"},
|
||||
{"reader", CmdLegicRFRead, 0, "[offset [length]] -- read bytes from a LEGIC card"},
|
||||
{"save", CmdLegicSave, 0, "<filename> [<length>] -- Store samples"},
|
||||
{"load", CmdLegicLoad, 0, "<filename> -- Restore samples"},
|
||||
{"sim", CmdLegicRfSim, 0, "[phase drift [frame drift [req/resp drift]]] Start tag simulator (use after load or read)"},
|
||||
{"write", CmdLegicRfWrite,0, "<offset> <length> -- Write sample buffer (user after load or read)"},
|
||||
{"fill", CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
|
||||
{NULL, NULL, 0, NULL}
|
||||
};
|
||||
|
||||
int CmdHFLegic(const char *Cmd) {
|
||||
clearCommandBuffer();
|
||||
CmdsParse(CommandTable, Cmd);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int CmdHelp(const char *Cmd) {
|
||||
CmdsHelp(CommandTable);
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in a new issue