Date from which the application may be used. Status of the different functions as seen from the reader/terminal. Note that this amount may not be equal to the final transaction amount. 00 00 7F FF FF 00 00 00 00 00 00 00 00 00 00 20 80 00, Consecutive Transaction Counter Limit (CTCL), Consecutive Transaction Counter Upper Limit (CTCUL), Application Program Identifier (Program ID). This site is run by Steven Murdoch and hosted by the Information Security Group at University College London. Indicates the type of cryptogram and the actions to be performed by the Kernel. Contains the tag requested by the GET DATA command. For MasterCard applications, if the value of YY ranges from '00' to '49' the date reads 20YYMMDD. May be sent in authorisation response from issuer when response contains Issuer Script. Counter maintained by the application in the card (incrementing the ATC is managed by the card). The Third Party Data contains various information, possibly including information from a third party. Indicates the currency code of the transaction according to ISO 4217. Integrated data storage support by the Kernel depends on the presence of this data object. This amount is expressed with implicit decimal point corresponding to the minor unit of currency as defined by [ISO 4217] (for example the six bytes '00 00 00 00 01 23' represent USD 1.23 when the currency code is '840'). 1-4 languages stored in order of preference, each represented by 2 alphabetical characters according to ISO 639. Specifies conditions that cause a transaction to be transmitted online. Unprotected Data Envelopes can be retrieved with the GET DATA command and can be updated with the PUT DATA (CLA='80') command without secure messaging. 82 and 9F02 are an example of how EMVCo failed. I'm not an X690 guru by any means. Indicates the CVM capability of the Terminal/Reader in the case of a mag-stripe mode transaction when the Amount, Authorized (Numeric) is less than or equal to the Reader CVM Required Limit. This data item indicates the point at which the Kernel shifts from the Card reading phase to the Card writing phase. Indicates the transaction amount above which the Kernel instantiates the CVM capabilities field in Terminal Capabilities with CVM Capability - CVM Required. For transactions where Offline Data Authentication is performed, the Application Expiration Date is returned. Lists a number of card features beyond regular payment. It admits the following values: Transaction Reference Currency Conversion. If the object is not found, assume by default that the card and terminal application versions are compatible. Possible values are 'completed' or 'not completed'. Indicates whether the terminal supports an alternate payment interface to the contactless Reader. Identifies the AEF referenced in commands related to a given ADF or DDF. Contains proprietary application data for transmission to the issuer in an online transaction. Otherwise it is 28 bytes. Identifies the data field of a command message, Identifies the name of the DF as described in ISO/IEC 7816-4, Contains a command for transmission to the ICC, Indicates the priority of a given application or group of applications in a directory. Skip to content. Issuer discretionary part of the File Control Information Proprietary Template. PUNATC(Track2) indicates to the Kernel the positions in the discretionary data field of Track 2 Data where the Unpredictable Number (Numeric) digits and Application Transaction Counter digits have to be copied. Payment system public key used for offline data authentication. The Additional Terminal Capabilities is coded according to Annex A.3 of [EMV Book 4]. Payment system public key used for dynamic data authentication. This data allows the Kernel to check the consistency between DS Summary 1 and DS Summary 2, and so to ensure that DS ODS Card is provided by a genuine Card. Contains the Card stored operator proprietary data obtained in the response to the GET PROCESSING OPTIONS command. Used in application selection. The Terminal Capabilities is coded according to Annex A.2 of [EMV Book 4]. Authorised amount of the transaction (excluding adjustments). EMVTM is a trademark owned by EMVCo LLC. For an application in the ICC to be supported by an application in the terminal, the Application Selection Indicator indicates whether the associated AID in the terminal must match the AID in the card exactly, including the length of the AID, or only up to the length of the AID in the terminal There is only one Application Selection Indicator per AID supported by the terminal, At the discretion of the terminal. Indicates the type of cryptogram and the actions to be performed by the terminal after the GENERATE AC command. Indicates the floor limit in the terminal in conjunction with the AID, Designates the unique location of a Terminal at a merchant, Application-specific value used by the card for risk management purposes, Unique and permanent serial number assigned to the IFD by the manufacturer, Discretionary part of track 1 according to ISO/IEC 7813, Discretionary part of track 2 according to ISO/IEC 7813. Kernel 7 Spec v2.6 The Kernel stores the offline balance read from the Card in Balance Read Before Gen AC. This data object is part of the Discretionary Data provided by the Kernel to the Terminal. This variable length data item has an initial byte that defines the maximum version number supported by the Terminal and a variable number of subsequent bytes that define how the Terminal supports earlier versions of the specification. A Visa proprietary data element, Issuer Limit for VLP available funds, is used to reset VLP Available Funds after an online approved transaction. Indicates the security capability of the Kernel. Integrated Circuit Card (ICC) PIN Encipherment Public Key Certificate, ICC PIN Encipherment Public Key certified by the issuer, Integrated Circuit Card (ICC) PIN Encipherment Public Key Exponent, ICC PIN Encipherment Public Key Exponent used for PIN encipherment, Integrated Circuit Card (ICC) PIN Encipherment Public Key Remainder, Remaining digits of the ICC PIN Encipherment Public Key Modulus, Issuer public key exponent used for the verification of the Signed Static Application Data and the ICC Public Key Certificate. The Card Data Input Capability is coded according to Annex A.2 of [EMV Book 4]. Contains the Card indication, obtained in the response to the GET PROCESSING OPTIONS command, about either the stored summary associated with DS ODS Card if present, or about a default zero-filled summary if DS ODS Card is not present and DS Unpredictable Number is present. n 9F26: Application cryptogram EMV mode readers that support Dynamic Reader Limits (DRL) functionality examine the Application Program ID to determine the Reader Limit Set to apply. Dismiss Join GitHub today. Indicates the contactless transaction limit of the reader for a specific AID. Contains Terminal provided data if permanent data storage in the Card was applicable (DS Slot Management Control[8]=1b), remains applicable, or becomes applicable (DS ODS Info[8]=1b). Version number assigned by the payment system for the specific mag-stripe mode functionality of the Kernel. Discretionary data, discretionary template. If present indicates offline approval from card. If the value of YY ranges from '50' to '99' the date reads 19YYMMDD. From EMV 4.3 Book 3 Common Core Definitions, Application Specification, November 2011, Page 206, C7.2 The CVR has a fixed length of 5 bytes (10 hexadecimals characters) that are the bytes 4-8 included of Issuer Application Data, EMV tag 9F10. Required for EMV Mode. An internal working variable used to indicate the C-APDU that is currently being processed by the Card. Application Public Key Certificate used during CDA. Dynamic signature generated by the card and validated by the reader during fDDA processing. Encrypted PIN Block in Tag 9F62 - ISO 95641 Format 0, Encrypted PIN Block - ISO 9564-1 Format 1 PIN Block (Thales P3 Format 05). Specifies the issuer's conditions that cause a transaction to be transmitted online. I am working on a POS application that supports EMV cards. In Part I of this post, we talked a bit about EMV transactions and how they’re structured.We saw that: Unlike MSR (magstripe) transactions, an EMV transaction occurs in multiple stages. Indicates the type of cryptogram (TC, ARQC, or AAC) returned by the card and the actions to be performed by the reader. If necessary, it is padded to the left with hexadecimal zeroes to ensure a minimum length of 8 bytes. Visa proprietary data element specifying the upper limit of the total amount of offline domestic transactions in the designated currency (Application Currency Code) and a secondary currency (Secondary Application Currency Code) allowed for that card application before a transaction is forced to go online. Maximum time, in seconds, that a record can remain in the Torn Transaction Log. Proprietary data element returned from the Card in the GET PROCESSING OPTIONS response, indicating the status of Mobile CVM entry. Cryptogram returned by the ICC in response of the GENERATE AC or RECOVER AC command. The Discretionary Data is a list of Kernel-specific data objects sent to the Terminal as a separate field in the OUT signal. Choice is made dynamically by card based on transaction context and card risk management configuration. Defines the time in ms before the timer generates a TIMEOUT signal. EMV tag result emv emv tags tlv decoder cap calculator cryptogram calc crypto des calc asn1 decoder banking pin translation keyshare tools misc hex dump char converter research banking t&c pin usage relay attack sca in psd2 revocable payments sim swap scams confirmation of payee fraud on libra Contains data sent to the ICC to indicate whether the issuer approves or declines the transaction, and to initiate actions specified by the issuer. PAR SHALL be required personalisation data for payment tokens but will be optional for terminals to read and transmit. Contains list of tags of primitive data objects whose value fields are to be included in the ICC Public Key Certificate hash result. Indicates the limit for which CVM is required. Updating the Protected Data Envelope with the PUT DATA command requires secure messaging and is outside the scope of this specification. Indicates the form factor of the consumer payment device and the type of contactless interface over which the transaction was conducted. without Unpredictable Number (Numeric), Application Transaction Counter, CVC3 (Track2) and nUN included). It shall be present for EMV Mode and Legacy Mode. It is located in the ICC Dynamic Data recovered from the Signed Dynamic Application Data. I'm looking for EMV Tag value. The presence of Balance Read After Gen AC in the TLV Database is an indication to the Kernel to read the offline balance from the Card after the GENERATE AC command. Integrated Data Storage Record Update Template. Indicates the country of the issuer as defined in ISO 3166 (using a 2 character alphabetic code), Indicates the country of the issuer as defined in ISO 3166 (using a 3 character alphabetic code), Indicates the type of account selected on the terminal, coded as specified in Annex G, Commitment (e.g., a positive number less than the public RSA modulus in use), Challenge (e.g., a number, possibly zero, less than the public RSA exponent in use), Response (e.g., a positive number less than the public RSA modulus in use), Committed challenge (e.g., the hash-code of a commitment data object), Authentication code (e.g., the hash-code of one or more data fields and a commitment data object), Exponential (e.g., a public positive number for establishing a session key by a DH method). Defines the reader CVM requirement and capabilities, as well as other reader capabilities (online capability, contact EMV capability) for the Transaction, Cumulative Total Transaction Amount Limit (CTTAL). I am able to read card data from a Verifone MX card reader in TLV, but I am facing issues in decoding the TLV data to readable data. Max Number of Torn Transaction Log Records. Issuer's public key certified by a certificate authority for use in static data authentication. Kernel 3 shall not act on AIP bit settings that are not supported for Kernel 3 or that are Reserved for Future Use (RFU). Requested in CDOL1. File Control Information (FCI) Proprietary Template, Identifies the data object proprietary to this specification in the FCI template according to ISO/IEC 7816-4, File Control Information (FCI) Issuer Discretionary Data. This copy is used to verify the CDA signature during the subsequent transaction recovery process. Specifies the range in which the unpredictable number must be generated in for contactless mag-stripe mode. The Default UDOL must contain as its only entry the tag and length of the Unpredictable Number (Numeric) and has the value: '9F6A04'. This flag indicates whether a transaction with a zero amount is permitted. This data object may be provided several times by the Terminal in a DET signal. Indicates if CDA is to be performed for the transaction in progress. Holds a copy of a record from the Torn Transaction Log. DS Input (Term) is used by the Kernel as input to calculate DS Digest H. Contains instructions from the Terminal on how to proceed with the transaction if: Information reported by the Kernel to the Terminal about: Contains a value that uniquely identifies each Kernel. Non-zero value generated by the Authorisation Systems for an approved transaction. Indicates the Kernel configuration options. Certification Authority Public Key Index (PKI), Identifies the certification authority's public key in conjunction with the RID. There is one occurrence of this data object for each Kernel in the Reader. Any EMV tag missing? EMV-L2-Kernel-Tags . Otherwise, compare the value fields of the data objects with tag 9F08 and with tag … The value of this data object is composed of a series of TLVs. Indicates the time that the field is to be turned off after the transaction is completed if requested to do so by the cardholder device. In the authorization request message this is the amount used by the chip card when calculating the Application Cryptogram. Search for the data object with tag 9F08 in the EMV ¢ data objects heap. Present if the Combination supports Random Transaction Selection (EMV Mode only). In this case, the maximum length of 'Proprietary Data' is 26 bytes. ). Contains Terminal provided data if permanent data storage in the Card was applicable (DS Slot Management Control[8]=1b), remains applicable or becomes applicable (DS ODS Info[8]=1b). A counter that is decremented by the Amount Authorized when a VLP transaction is approved. Defines some acquirer options for the combination, e.g. These fields are grouped into two key sets. Torn Record is sent to the Terminal as part of the Discretionary Data. Transmitted to the card in Issuer Authentication Data. Issuer-specified data to be used with the Issuer's public key algorithm for static data authentication. Lower cummulative offline transaction amount, Upper cumulative offline transaction amount, Card Issuer Action Code (PayPass) - Default, Card Issuer Action Code (PayPass) - Online, Card Issuer Action Code (PayPass) - Decline. Indicates whether a timeout function should be started with the time specified. EMV® is a registered trademark of EMVCo LLC. 2020-12-24 Terminal Transaction Qualifiers(TTQ)(9F66)(PayWave). The reader shall return the value of the Merchant Name and Location when requested by the card in a Data Object List. Response messages for SFIs 11-30 are outside the scope of EMV, but may use template '70'), Contains proprietary issuer data for transmission to the ICC before the second GENERATE AC command, Contains proprietary issuer data for transmission to the ICC after the second GENERATE AC command, Issuer discretionary part of the directory according to ISO/IEC 7816-5, Contains the data objects (with tags and lengths) returned by the ICC in response to a command. Sign in to site. Secondary amount associated with the transaction representing a cashback amount. All other trademarks and registered trademarks are the property of their respective owners. Requested in CDOL1. Contains proprietary application data for transmission to the Issuer in all transaction messages. to display message with identifier: '1D' (“Please insert card”). Internal progression value ('X'-is a specific index, e.g., an index referencing a counter of file selections), External progression value ('Y'-is a specific index, e.g., an index referencing an external time stamp), Cryptographic mechanism identifier template, optional, Cryptogram (plain value coded in BER-TLV and including secure messaging data objects), Cryptogram (plain value coded in BER-TLV, but not including secure messaging data objects), Padding-content indicator byte followed by cryptogram (plain value not coded in BER-TLV), Cryptographic checksum (at least four bytes), Security environment identifier (SEID byte, see 6.5), Number Le in the unsecured command APDU (one or two bytes), Processing status of the secured response APDU (new SW1-SW2, two bytes), Input data element for the computation of a digital signature (the value field is signed), Input template for the computation of a hash-code (the template is hashed), Input template for the verification of a cryptographic checksum (the template is integrated), Control reference template for authentication (AT), Input template for the verification of a digital signature (the template is signed), Template, Control reference for hash-code (HT), Input template for the computation of a digital signature (the concatenated value fields are signed), Input template for the computation of a certificate (the concatenated value fields are certified), Plain value coded in BER-TLV and including secure messaging data objects, Plain value coded in BER-TLV, but not including secure messaging data objects, Control reference template for cryptographic checksum (CCT), Control reference template for digital signature (DST), Control reference template for confidentiality (CT), Input template for the computation of a digital signature (the template is signed), Input template for the verification of a certificate (the template is certified), Template, Nesting Interindustry data objects, Algorithm reference as used in control reference data objects for secure messaging, RSA Modulus (a number denoted as n coded on x bytes), or DSA First prime (a number denoted as p coded on y bytes), or ECDSA Prime (a number denoted as p coded on z bytes), RSA Public exponent (a number denoted as v, e.g., 65537), or DSA Second prime (a number denoted as q dividing p-1, e.g., 20 bytes), or ECDSA First coefficient (a number denoted as a coded on z bytes), DSA Basis (a number denoted as g of order q coded on y bytes), or ECDSA Second coefficient (a number denoted as b coded on z bytes), DSA Public key (a number denoted as y equal to g to the power x mod p where x is the private key coded on y bytes), or ECDSA Generator (a point denoted as PB on the curve, coded on 2z bytes), ECDSA Order (a prime number denoted as q, order of the generator PB, coded on z bytes), ECDSA Public key (a point denoted as PP on the curve, equal to x times PB where x is the private key, coded on 2z bytes), Template, Certificate Holder Authorization, Contains the data objects (without tags and lengths) returned by the ICC in response to a command. The date is expressed in the YYMMDD format. Tag Definition Emv [34m753o1o846]. The picture above shows a list of "EMV Tags" with corresponding meaning for each in the "Chip Data" column. This list can be augmented with Terminal requested data items provided during Kernel processing in DET signals. Contains information regarding the nature of the error that has been encountered during the transaction processing. Indicates the card data input, CVM, and security capabilities of the Terminal. Counter maintained by the application in the card. A copy of the card Track 2 Equivalent Data, kept by the Kernel after a torn transaction in EMV Mode to ensure that the card presented for recovery is the same as for the torn transaction. A Visa proprietary data element indicating the maximum amount allowed for single VLP transaction. Terminals that are Online Capable must be capable of performing Partial Online contactless transactions. Digital signature on critical application parameters for DDA or CDA, Time-variant number generated by the ICC, to be captured by the terminal, Provides the SFI of the Transaction Log file and its number of records. You need JavaScript enabled to view it. The presence of Balance Read Before Gen AC in the TLV Database is an indication to the Kernel to read the offline balance from the Card before the GENERATE AC command. Indicates the card's preference for the kernel on which the contactless application can be processed. Indicates the location (SFI range of records) of the Application Elementary Files associated with a particular AID, and read by the Kernel during a transaction. Data element indicating other interfaces supported by the device. Authorised amount of the transaction (excluding adjustments), Indicates the capabilities of the card to support specific functions in the application. For MasterCard branded applications if the value of YY ranges from '00' to '49' the date reads 20YYMMDD. Contains the data elements of track 2 according to ISO/IEC 7813, excluding start sentinel, end sentinel, and Longitudinal Redundancy Check (LRC). Cumulative Total Transaction Amount Upper Limit (CTTAUL). Specifies the acquirer's conditions that cause the denial of a transaction without attempt to go online, Used in Kernel 5 Terminal Action Analysis, Specifies the acquirer's conditions that cause a transaction to be transmitted online. Combines all parameters to be sent with the MSG signal. The actual values to be used for the Transaction Type data element are defined by the relevant payment system. Indicates a secondary currency to be converted to the designated currency in which the account is managed (Application Currency Code) according to ISO 4217. Nonzero value generated by the issuer for an approved transaction. This makes me wonder if the tag number should be 0x80 after the SHL 7 instead of 0. Number of non-zero bits in PUNATC(Track2) - NATC(Track2). Response messages for SFIs 11-30 are outside the scope of EMV, but may use template '70'), Contains the contents of the record read. Proprietary merchant data that may be requested by the Card. Indicates the implied position of the decimal point from the right of the transaction amount represented according to ISO 4217. The Mobile Support Indicator informs the Card that the Kernel supports extensions for mobile and requires on device cardholder verification. Specifies conditions that cause the decline of a transaction without attempting to go online. If it is not present in the Card, then the Default UDOL is used. Value is given in units of 100ms. Application Capabilities Information (ACI). Contains the data objects of the track 2, in accordance with [ISO/IEC 7813], excluding start sentinel, end sentinel, and LRC. Please let This email address is being protected from spambots. The Kernel stores the offline balance read from the Card in Balance Read After Gen AC. The number that identifies the major industry and the card issuer and that forms the first part of the Primary Account Number (PAN). Secondary amount associated with the transaction representing a cashback amount. Offline capable terminals are capable of performing offline contactless transactions. This field contains data generated by the issuer, which the card/device can use for verification to complete or decline the transaction. The Cryptogram Information Data is coded according to Table 14 of [EMV Book 3]. DD Card (Track2) contains a copy of the discretionary data field of Track 2 Data as returned by the Card in the file read using the READ RECORD command during a mag-stripe mode transaction (i.e. A Python package for EMV cryptography in payment systems - knovichikhin/pyemv. Indicates that the Terminal will send no more requests to read data other than as indicated in Tags To Read. List of data objects (tag and length) to be passed to the card in the GET MAGSTRIPE DATA command. Indicates the data input and output capabilities of the Terminal. Cardholder Verification Method (CVM) Results, Indicates the results of the last CVM performed, Indicates the environment of the terminal, its communications capability, and its operational control, Counter maintained by the application in the ICC (incrementing the ATC is managed by the ICC).