Parsing an ATR: now in color

Since 2010 I provide a way to parse an ATR online using a web page. I also provide a Python script to do the same using a command line tool.

I am not a user interface design expert. But I like to have important elements in color. Syntax colorization is a great invention. So I decided to add color to the ATR parsing results.

Web page

Before

(compact TLV data object)
    Tag: 3, Len: 1 (card service data byte)
      Card service data byte: 193
        - Application selection: by full DF name
        - Application selection: by partial DF name
        - EF.DIR and EF.ATR access services: by GET RECORD(s) command
        - Card without MF
    Tag: 7, Len: 3 (card capabilities)
      Selection methods: 192
        - DF selection by partial DF name
        - DF selection by full DF name
      Data coding byte: 1
        - Behaviour of write functions: one-time write
        - Value 'FF' for the first byte of BER-TLV tag fields: valid
        - Data unit in quartets: 1
     Command chaining, length fields and logical channels: 0
        - Logical channel number assignment: No logical channel
        - Maximum number of logical channels: 0
    Mandatory status indicator (3 last bytes)
      LCS (life card cycle): 0 (No information given)
      SW: 9000 ()

After

(compact TLV data object)
    Tag: 3, Len: 1 (card service data byte)
      Card service data byte: 193
        - Application selection: by full DF name
        - Application selection: by partial DF name
        - EF.DIR and EF.ATR access services: by GET RECORD(s) command
        - Card without MF
    Tag: 7, Len: 3 (card capabilities)
      Selection methods: 192
        - DF selection by partial DF name
        - DF selection by full DF name
      Data coding byte: 1
        - Behaviour of write functions: one-time write
        - Value 'FF' for the first byte of BER-TLV tag fields: valid
        - Data unit in quartets: 1
      Command chaining, length fields and logical channels: 0
        - Logical channel number assignment: No logical channel
        - Maximum number of logical channels: 0
    Mandatory status indicator (3 last bytes)
      LCS (life card cycle): 0 (No information given)
      SW: 90 00 ()

Command line

Before

ATR: 3B FA 13 00 FF 81 31 80 45 00 31 C1 73 C0 01 00 00 90 00 B1
TS = 0x3B --> Direct Convention
T0 = 0xFA --> Y(1): b1111, K: 10 (historical bytes)
 TA(1) = 0x13 --> Fi=372, Di=4, 93 cycles/ETU (43010 bits/s at 4.00 MHz, 53763 bits/s for fMax=5 MHz)
 TB(1) = 0x00 --> VPP is not electrically connected
 TC(1) = 0xFF --> Extra guard time: 255 (special value)
 TD(1) = 0x81 --> Y(i+1) = b1000, Protocol T=1
----
 TD(2) = 0x31 --> Y(i+1) = b0011, Protocol T=1
----
 TA(3) = 0x80 --> IFSC: 128
 TB(3) = 0x45 --> Block Waiting Integer: 4 - Character Waiting Integer: 5
----
Historical bytes --> 00 31 C1 73 C0 01 00 00 90 00
  Category indicator byte: 0x00 -->  (compact TLV data object)
    Tag: 3, Len: 1 (card service data byte)
      Card service data byte: 193
        - Application selection: by full DF name
        - Application selection: by partial DF name
        - EF.DIR and EF.ATR access services: by GET RECORD(s) command
        - Card without MF
    Tag: 7, Len: 3 (card capabilities)
      Selection methods: 192
        - DF selection by partial DF name
        - DF selection by full DF name
      Data coding byte: 1
        - Behaviour of write functions: one-time write
        - Value 'FF' for the first byte of BER-TLV tag fields: valid
        - Data unit in quartets: 1
      Command chaining, length fields and logical channels: 0
        - Logical channel number assignment: No logical channel
        - Maximum number of logical channels: 0
    Mandatory status indicator (3 last bytes)
      LCS (life card cycle): 0 (No information given)
      SW: 9000 ()
TCK = 0xB1  --> (correct checksum)
Possibly identified card: OpenPGP

After

ATR: 3B FA 13 00 FF 81 31 80 45 00 31 C1 73 C0 01 00 00 90 00 B1
TS = 0x3B --> Direct Convention
T0 = 0xFA --> Y(1): b1111, K: 10 (historical bytes)
 TA(1) = 0x13 --> Fi=372, Di=4, 93 cycles/ETU (43010 bits/s at 4.00 MHz, 53763 bits/s for fMax=5 MHz)
 TB(1) = 0x00 --> VPP is not electrically connected
 TC(1) = 0xFF --> Extra guard time: 255 (special value)
 TD(1) = 0x81 --> Y(i+1) = b1000, Protocol T=1
----
 TD(2) = 0x31 --> Y(i+1) = b0011, Protocol T=1
----
 TA(3) = 0x80 --> IFSC: 128
 TB(3) = 0x45 --> Block Waiting Integer: 4 - Character Waiting Integer: 5
----
Historical bytes --> 00 31 C1 73 C0 01 00 00 90 00
  Category indicator byte: 0x00 -->  (compact TLV data object)
    Tag: 3, Len: 1 (card service data byte)
      Card service data byte: 193
        - Application selection: by full DF name
        - Application selection: by partial DF name
        - EF.DIR and EF.ATR access services: by GET RECORD(s) command
        - Card without MF
    Tag: 7, Len: 3 (card capabilities)
      Selection methods: 192
        - DF selection by partial DF name
        - DF selection by full DF name
      Data coding byte: 1
        - Behaviour of write functions: one-time write
        - Value 'FF' for the first byte of BER-TLV tag fields: valid
        - Data unit in quartets: 1
      Command chaining, length fields and logical channels: 0
        - Logical channel number assignment: No logical channel
        - Maximum number of logical channels: 0
    Mandatory status indicator (3 last bytes)
      LCS (life card cycle): 0 (No information given)
      SW: 90 00 ()
TCK = 0xB1  --> correct checksum
Possibly identified card: OpenPGP

Conclusion