def test_encrypt_command_data_mastercard_nonpadded() -> None: # If MasterCard data is not multiple of 8 bytes # then it has to be padded with 0x80 and 0x00 until # it is multiple of 8 bytes. # if the data is multiple of 8 bytes then no padding # is required. no_padding_required = sm.encrypt_command_data( sk_smc=bytes.fromhex("AAAAAAAAAAAAAAAABBBBBBBBBBBBBBBB"), command_data=bytes.fromhex("1234800000000000"), encryption_type=sm.EncryptionType.MASTERCARD, ) padding_required = sm.encrypt_command_data( sk_smc=bytes.fromhex("AAAAAAAAAAAAAAAABBBBBBBBBBBBBBBB"), command_data=bytes.fromhex("1234"), encryption_type=sm.EncryptionType.MASTERCARD, ) assert no_padding_required == padding_required
def test_encrypt_command_data_exception() -> None: # SK < 16 bytes with pytest.raises( ValueError, match="Session Key must be a double length DES key", ): sm.encrypt_command_data( sk_smc=bytes.fromhex("AAAAAAAAAAAAAAAA"), command_data=bytes.fromhex("12345678901214"), encryption_type=sm.EncryptionType.VISA, ) # SK > 16 bytes with pytest.raises( ValueError, match="Session Key must be a double length DES key", ): sm.encrypt_command_data( sk_smc=bytes.fromhex("AAAAAAAAAAAAAAAABBBBBBBBBBBBBBBBCCCCCCCCCCCCCCCC"), command_data=bytes.fromhex("12345678901214"), encryption_type=sm.EncryptionType.VISA, ) # Invalid encryption type with pytest.raises( TypeError, match="Encryption type must be EncryptionType Enum, not dict", ): sm.encrypt_command_data( sk_smc=bytes.fromhex("AAAAAAAAAAAAAAAABBBBBBBBBBBBBBBB"), command_data=bytes.fromhex("12345678901214"), encryption_type={}, # type: ignore )
def test_vis_change_current_pin_12(): """ Test generation of offline PIN script with VIS PIN block with current PIN Both PINs are 12 digits long. Master Key Derivation = Option A SMI/SMC using Visa Session Key Derivation PIN encipherment with mandatory Visa padding """ # Verify issuer master key check digits iss_mk_ac = bytes.fromhex("FEDCBA98765432100123456789ABCDEF") assert tools.key_check_digits(iss_mk_ac, 3).hex().upper() == "7B8358" iss_mk_smc = bytes.fromhex("11111111111111112222222222222222") assert tools.key_check_digits(iss_mk_smc, 3).hex().upper() == "D2B91C" iss_mk_smi = bytes.fromhex("0123456789ABCDEFFEDCBA9876543210") assert tools.key_check_digits(iss_mk_smi, 3).hex().upper() == "08D7B4" # Derive ICC master keys pan = b"1234567890123456" psn = b"01" icc_mk_ac = kd.derive_icc_mk_a(iss_mk_ac, pan, psn) assert tools.key_check_digits(icc_mk_ac, 3).hex().upper() == "C5CACD" icc_mk_smc = kd.derive_icc_mk_a(iss_mk_smc, pan, psn) assert tools.key_check_digits(icc_mk_smc, 3).hex().upper() == "6B0F76" icc_mk_smi = kd.derive_icc_mk_a(iss_mk_smi, pan, psn) assert tools.key_check_digits(icc_mk_smi, 3).hex().upper() == "02396B" # Verify SMC/SMI session key # Common Session Key Derivation Option r = bytes.fromhex("FFFF") sk_smc = kd.derive_visa_sm_sk(icc_mk_smc, r) assert tools.key_check_digits(sk_smc, 3).hex().upper() == "BD7C46" sk_smi = kd.derive_visa_sm_sk(icc_mk_smi, r) assert tools.key_check_digits(sk_smi, 3).hex().upper() == "A41D47" # Encrypt new PIN pin_block = sm.format_vis_pin_block(icc_mk_ac, b"999999999999", b"888888888888") assert pin_block.hex().upper() == "841111112A5E67F1" command_data = sm.encrypt_command_data(sk_smc, pin_block, sm.EncryptionType.VISA) assert command_data.hex().upper() == "622066A74F1E974AEE671384F0D3A7B9" # Script MAC generated using Session Key command_header = bytes.fromhex("8424000110") mac = sm.generate_command_mac(sk_smi, command_header + command_data) assert mac.hex().upper() == "829AC5DE4B88074D"
def test_vis_change_change_current_pin(pin: Union[bytes, str], current_pin: Union[bytes, str]) -> None: """ Test generation of offline PIN script with VIS PIN block with current PIN Master Key Derivation = Option A SMI/SMC using Visa Session Key Derivation PIN encipherment with mandatory Visa padding """ # Verify issuer master key check digits iss_mk_ac = bytes.fromhex("FEDCBA98765432100123456789ABCDEF") assert tools.key_check_digits(iss_mk_ac, 3).hex().upper() == "7B8358" iss_mk_smc = bytes.fromhex("11111111111111112222222222222222") assert tools.key_check_digits(iss_mk_smc, 3).hex().upper() == "D2B91C" iss_mk_smi = bytes.fromhex("0123456789ABCDEFFEDCBA9876543210") assert tools.key_check_digits(iss_mk_smi, 3).hex().upper() == "08D7B4" # Derive ICC master keys pan = "1234567890123456" psn = "01" icc_mk_ac = kd.derive_icc_mk_a(iss_mk_ac, pan, psn) assert tools.key_check_digits(icc_mk_ac, 3).hex().upper() == "C5CACD" icc_mk_smc = kd.derive_icc_mk_a(iss_mk_smc, pan, psn) assert tools.key_check_digits(icc_mk_smc, 3).hex().upper() == "6B0F76" icc_mk_smi = kd.derive_icc_mk_a(iss_mk_smi, pan, psn) assert tools.key_check_digits(icc_mk_smi, 3).hex().upper() == "02396B" # Verify SMC/SMI session key # Common Session Key Derivation Option r = bytes.fromhex("FFFF") sk_smc = kd.derive_visa_sm_sk(icc_mk_smc, r) assert tools.key_check_digits(sk_smc, 3).hex().upper() == "BD7C46" sk_smi = kd.derive_visa_sm_sk(icc_mk_smi, r) assert tools.key_check_digits(sk_smi, 3).hex().upper() == "A41D47" # Encrypt new PIN pin_block = sm.format_vis_pin_block(icc_mk_ac, pin, current_pin) assert pin_block.hex().upper() == "8C1199FFC4B001F1" command_data = sm.encrypt_command_data(sk_smc, pin_block, sm.EncryptionType.VISA) assert command_data.hex().upper() == "C29371CC36BA70C1EE671384F0D3A7B9" # Script MAC generated using Session Key command_header = bytes.fromhex("8424000110") mac = sm.generate_command_mac(sk_smi, command_header + command_data) assert mac.hex().upper() == "6AB3AD15D8B0621A"
def test_mastercard_pin_change_12(): """ Test generation of offline PIN script with ISO format 2 PIN block PIN is 12 digits long. Master Key Derivation = Option A SMI/SMC using Common Session Key Derivation (EMV SU-46) PIN encipherment with optional padding when block is not multiple of 8. However, no padding takes place because PIN block is 8 bytes long. """ # Verify issuer master key check digits iss_mk_smc = bytes.fromhex("11111111111111112222222222222222") assert tools.key_check_digits(iss_mk_smc, 3).hex().upper() == "D2B91C" iss_mk_smi = bytes.fromhex("0123456789ABCDEFFEDCBA9876543210") assert tools.key_check_digits(iss_mk_smi, 3).hex().upper() == "08D7B4" # Derive ICC master keys pan = b"1234567890123456" psn = b"01" icc_mk_smc = kd.derive_icc_mk_a(iss_mk_smc, pan, psn) assert tools.key_check_digits(icc_mk_smc, 3).hex().upper() == "6B0F76" icc_mk_smi = kd.derive_icc_mk_a(iss_mk_smi, pan, psn) assert tools.key_check_digits(icc_mk_smi, 3).hex().upper() == "02396B" # Verify SMC/SMI session key # Common Session Key Derivation Option r = bytes.fromhex("ABCDEF1234567890") sk_smc = kd.derive_common_sk(icc_mk_smc, r) assert tools.key_check_digits(sk_smc, 3).hex().upper() == "D694B8" sk_smi = kd.derive_common_sk(icc_mk_smi, r) assert tools.key_check_digits(sk_smi, 3).hex().upper() == "F088F8" # Encrypt new PIN pin_block = sm.format_iso9564_2_pin_block(b"999999999999") assert pin_block.hex().upper() == "2C999999999999FF" command_data = sm.encrypt_command_data(sk_smc, pin_block, sm.EncryptionType.MASTERCARD) assert command_data.hex().upper() == "99AD3AF9EB3ECF0C" # Script MAC generated using Session Key command_header = bytes.fromhex("8424000210") mac = sm.generate_command_mac(sk_smi, command_header + command_data) assert mac.hex().upper() == "1471D88C6393BE21"
def test_ccd_pin_change(pin: Union[bytes, str]) -> None: """ Test generation of offline PIN script with ISO format 2 PIN block' Common Core Definition. Mandatory padding. Master Key Derivation = Option A SMI/SMC using Common Session Key Derivation (EMV SU-46) PIN encipherment with optional padding when block is not multiple of 8. However, no padding takes place because PIN block is 8 bytes long. """ # Verify issuer master key check digits iss_mk_smc = bytes.fromhex("11111111111111112222222222222222") assert tools.key_check_digits(iss_mk_smc, 3).hex().upper() == "D2B91C" iss_mk_smi = bytes.fromhex("0123456789ABCDEFFEDCBA9876543210") assert tools.key_check_digits(iss_mk_smi, 3).hex().upper() == "08D7B4" # Derive ICC master keys pan = "1234567890123456" psn = "01" icc_mk_smc = kd.derive_icc_mk_a(iss_mk_smc, pan, psn) assert tools.key_check_digits(icc_mk_smc, 3).hex().upper() == "6B0F76" icc_mk_smi = kd.derive_icc_mk_a(iss_mk_smi, pan, psn) assert tools.key_check_digits(icc_mk_smi, 3).hex().upper() == "02396B" # Verify SMC/SMI session key # Common Session Key Derivation Option r = bytes.fromhex("ABCDEF1234567890") sk_smc = kd.derive_common_sk(icc_mk_smc, r) assert tools.key_check_digits(sk_smc, 3).hex().upper() == "D694B8" sk_smi = kd.derive_common_sk(icc_mk_smi, r) assert tools.key_check_digits(sk_smi, 3).hex().upper() == "F088F8" # Encrypt new PIN pin_block = sm.format_iso9564_2_pin_block(pin) assert pin_block.hex().upper() == "249999FFFFFFFFFF" command_data = sm.encrypt_command_data(sk_smc, pin_block, sm.EncryptionType.EMV) assert command_data.hex().upper() == "28367E05DE3381C29D30A6055A8DEB86" # Script MAC generated using Session Key command_header = bytes.fromhex("8424000210") mac = sm.generate_command_mac(sk_smi, command_header + command_data) assert mac.hex().upper() == "69DA1EE208823022"