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EMV Core Engine

See agnos..h

`#include`

Code Block

language	c

#include "agnoserrors.h"
//---- Agnos Framework Headers ----
#include "agnosdatabase.h"
//---- Global Headers ----
#include "gpi_agnos_framework_globals.h"

--

`tTransactionalContext`

Code Block

language	c

typedef struct {
	/** If bTRUE, TAC/IAC default processing is skipped if unable to go online*/
	tBoolean				mSkipTACIACDefault;
	/** If bTRUE, TAC processing is performed*/
	tBoolean				mTAC;
	/** If bTRUE, Floor Limit Checking is performed*/
	tBoolean				mFloorLimitChecking;
	/** If bTRUE, RTS is performed*/
	tBoolean				mRandomTransactionSelection;
	/** If bTRUE, Velocity Checking is performed*/
	tBoolean				mVelocityChecking;
	/** If bTRUE, Default TDOL is supported*/
	tBoolean				mDefaultTDOL;
	/** TDOL length*/
	tByte					mDefaultTDOLLen;
	/**Tag 0x97*/
	tByte					mDefaultTDOLValue[TDOL_MAX_LENGTH];
	/** If bTRUE, Default DDOL is supported*/
	tBoolean				mDefaultDDOL;
	/** DDOL length*/
	tByte					mDefaultDDOLLen;
	/**Tag 0x9F49 or 0x9F69 (UDOL for contactless)*/
	tByte					mDefaultDDOLValue[DDOL_MAX_LENGTH];
	/**Terminal Action Code - Denial*/
	tTVR 					mTACDenial; 
	/**Terminal Action Code - Online*/
	tTVR 					mTACOnline; 
	/**Terminal Action Code - Default*/
	tTVR 					mTACDefault;
	/**Tag 0x9F1B*/
	tAmount		 			mTerminalFloorLimit;
	/**See EMV Book III, TRM section - Random Transaction Selection*/
	tPercentage  			mTargetPercentage;
	/**See EMV Book III, TRM section - Random Transaction Selection. Same transaction currency exponent as 0x9F02*/
	tAmount		  			mThresholdValue;
	/**See EMV Book III, TRM section - Random Transaction Selection*/
	tPercentage  			mMaxTargetPercentage;
	/**if bTRUE, pin may be bypassed when requested*/
	tBoolean				mPINByPass;
	/**bTRUE when merchant manually requested transaction to go online*/
	tBoolean				mForcedOnline;

	/**Tag 0x9A*/
	tNumericDate			mTransactionDate[3];
	/**Tag 0x9F21*/
	tNumericDate			mTransactionTime[3];
	/**Tag 0x9F35*/
	tTerminalType			mTerminalType;
	/** Transaction language*/
	tByte					mLanguage;
	/** PIN entry delay in second*/
	tCounter				mPinTimeOut;
	/** CDAMode1, CDAMode2 and CDAMode3 only*/
	tCDAType				mCDAType;
	/**if bTRUE, Terminal Risk Management is performed even if ICC doesn't request it*/
	tBoolean				mForceTRM;

	/**Tag 0x5F57*/
	tByte					mAccountType;
	/**Tag 0x9F39*/
	tByte					mPOSEntryMode;
	/**Tag 0x9F41*/
	tCounter				mTransactionSequenceCounter;
	/**Tag 0x9F1D*/
	tByte					mTerminalRiskManagementData[8];
	/**Tag 0x9F3A*/
	tAmount					mAmountReferenceCurrency;
	/**Tag 0x9F3C*/
	tByte					mTransactionReferenceCurrencyCode[2];
	/**Tag 0x9F3D*/
	tByte					mTransactionReferenceCurrencyExponent;
	/**Tag 0x9F1A*/
	tByte 					mTerminalCountryCode[2];
	/**Tag 0x5F2A*/
	tByte 					mTransactionCurrencyCode[2];
	/**Tag 0x5F36*/
	tByte 					mTransactionCurrencyExponent;
	/**Tag 0x9F33*/
	tByte 					mTerminalCapabilities[3];
	/**Tag 0x9F40*/
	tByte 					mAdditionalTerminalCapabilities[5];
	/**Tag 0x9F09*/
	tByte 					mApplicationVersionNumber[2];
	/**Tag 0x9C*/
	tByte					mTxnType;
	/**Tag 0x9F1C*/
	tByte					mTerminalIdentification[8];
	/**Tag 0x9F1E*/
	tByte					mIFDSerialNumber[8];
	/**Tag 0x9F01*/
	tByte					mAcquirerIdentifier[6];
} tTransactionalContext;

`agnGetVersionNumber`

Code Block

language	c

DLLEXPORT tString agnGetVersionNumber(void);

Get EMV core engine version.

`agnOpenSession`

Code Block

language	c

DLLEXPORT tAgnosError agnOpenSession(
	const tString smartcardReaderName,
	const tString pinPadName,
	const tString applicationId,
	const tTransactionalContext *txnContext,
	tBoolean DirectExecution,
	tBoolean setEMVTag,
	tSessionId *session,
	tBoolean clipping,
	tBoolean sred
);

Open a CT session to initiate an EMV transaction flow.

`agnInitiateEMVTransaction`

Code Block

language	c

DLLEXPORT tAgnosError agnInitiateEMVTransaction (
	tSessionId session,
	const tAmount *amount,
	const tAmount *cashBack,
	const tByte *AID,
	tByte AIDLen,
	tByte *CID
);

Initiate/Resume an EMV transaction

`agnCompleteEMVTransaction`

Code Block

language	c

DLLEXPORT tAgnosError agnCompleteEMVTransaction (
	tSessionId session,
	tARC ARC,
	tByte *CID,
	const tByte *issuerResponse,
	tWord issuerResponseLen,
	tBoolean unableToGoOnline
);

Complete a transaction as per EMVCo definition

agnGetDatabase

Code Block

language	c

DLLEXPORT tTagDataBase* agnGetDatabase(const tSessionId session);

agnIsEMVTagKnown

Code Block

language	c

DLLEXPORT tBoolean agnIsEMVTagKnown(
	tWord tag	// In: Tag to search in db storing referenced tags
);

Return bTRUE is tag statically known.

agnIsEMVTagPresent

Code Block

language	c

DLLEXPORT tBoolean agnIsEMVTagPresent(
	tSessionId session,	// In: Kernel's session
	tWord tag			// In: Tag to search in current session
);

Return bTRUE if tag is present whatever its length.

agnIsEMVTagEmpty

Code Block

language	c

DLLEXPORT tBoolean agnIsEMVTagEmpty(
	tSessionId session,	// In: Kernel's session
	tWord tag			// In: Tag to assess length
);

Return bTRUE if tag’s length is 0.

agnIsEMVTagNotEmpty

Code Block

language	c

DLLEXPORT tBoolean agnIsEMVTagNotEmpty(
	tSessionId session,	// In: Kernel's session
	tWord tag			// In: Tag to assess length
);

Return bTRUE if tag’s length is not 0.

agnGetEMVTag

Code Block

language	c

DLLEXPORT tAgnosError agnGetEMVTag(
	tSessionId session, 		// In: Kernel's session
	tWord tag,				// In: See agnostypes.h. Tags values are word values (unsigned short)
	tByte *length,				// Out: Tag's length
	tByte *value				// Out: Value shall be allocated by calling application
)

Get a specific tag from Agnos database.

agnSetEMVTag

Code Block

language	c

DLLEXPORT tAgnosError agnSetEMVTag(
	tSessionId session,			// In: Kernel's session
	tWord tag,					// In: See agnostypes.h. Tags values are word values (unsigned short)
	tByte length,				// In: Length of tag's value
	const tByte *value			// In: Tag's length
);

Add a tag into Agnos database without checking tag’s update condition.

agnOverwriteEMVTag

Code Block

language	c

DLLEXPORT tAgnosError agnOverwriteEMVTag(
	tSessionId session,			// In: Kernel's session
	tWord tag,					// In: See agnostypes.h. Tags values are word values (unsigned short)
	tByte length,				// In: Length of tag's value
	const tByte *value			// In: Tag's length
);

Overwrite an existing tag. If it doesn’t exist, create it (no garbage collection if sizes don’t match).

agnRemoveEMVTag

Code Block
DLLEXPORT tAgnosError agnRemoveEMVTag( tSessionId session, // In: Kernel's session tWord tag // In: See agnostypes.h. Tags values are word values (unsigned short) );

Remove a tag from Agnos database (no garbage collection).

agnORTVR

Code Block
DLLEXPORT tAgnosError agnORTVR( tSessionId session, // In: Kernel's session tByte TVRPosition, // In: 0 based position tByte value // In: Value to OR );

OR a specific TVR’s bit to 1.

agnORAgnosTVR

Code Block

language	c

DLLEXPORT tAgnosError agnORAgnosTVR(
	tSessionId session,		// In: Kernel's session
	tByte AgnosTVRPosition, // In: 0 based position
	tByte value				// In: Value to OR
)

OR a specific Agnos TVR’s bit to 1.

agnSetAgnosTVR

Code Block

language	c

DLLEXPORT tAgnosError agnSetAgnosTVR(
	tSessionId session,		// In: Kernel's session
	tByte AgnosTVRPosition, // In: 0 based position
	tByte value				// In: Value to Set
);

Set a specific Agnos TVR byte value.

agnOpenSessionCL

Code Block

language	c

DLLEXPORT tAgnosError agnOpenSessionCL(
	const tString smartcardReaderName,			// In: Smartcard device name
	const tString pinPadName,					// In: Secured PIN entry device name
	const tString applicationId, 				// In: Application Id
	const tTransactionalContext *txnContext, 	// In: Context provided by the payment application
	tBoolean setEMVTag,							// In: set EMV data in kernel database (from transacitonal context)
	tSessionId *session,						// Out: Session returned by the kernel to be used when primitives are called
	tBoolean clipping,							// In: activate software clipping into Agnos
	tBoolean sred								// In: activate low level clipping
);

Open a CL session to initiate an EMV transaction flow

`agnCloseSession`

Code Block

language	c

DLLEXPORT tAgnosError agnCloseSession	(
	tSessionId session
);

Close a transaction flow.

agnSetAgnosDatabase

Add a series of tags. Each tag is statically indexed and ruled by an update condition. Use an appropriate update condition to store tags directly into Agnos database

agnSetKernelStatus

Set core engine to a specific state. Use this primitive to skip a state in State Machine mode

agnGetAllTags

Get all tags from Agnos database

Selection

See selection..h

#include

Code Block

language	c

#include "agnoserrors.h"
//---- Global Headers ----
#include "gpi_agnos_framework_globals.h"

--

`tADFList`

Code Block

language	c

typedef struct {
	tByte 		mNumberOfADF;
	tADF 		mList[MAX_SUPPORTED_ADF];
	tBoolean 	mEliminatedADF[MAX_SUPPORTED_ADF];
	tBoolean 	mCardBlocked;
	tBoolean 	mAnyBlockedApplication;
	tByte		mSelectionIndex;
} tADFList;

tADF

Code Block

typedef struct {
	tByte		mADFName[MAX_AID_LENGTH]; 		//0x4F
	tByte		mADFLen;
	tByte		mLabel[MAX_AID_LENGTH]; 		//0x50
	tByte		mLabelLen;
	tByte		mPreferredName[MAX_AID_LENGTH]; //0x9F12
	tByte		mPreferredNameLen;
	tByte		mPriorityIndicator; 			//0x87
	tByte		mLangagePreference[8]; 			//0x5F2D
	tByte		mLangagePreferenceLen;
	tByte		mIssuerCodeTableIndex; 			//0x9F11
	tByte		mRemainingFCI[MAX_REMAINING_FCI_LENGTH]; 			//0xBF0C. May contain Issuer Country Code 5F56 AND/OR Application Selection Flag DF62
	tByte		mRemainingFCILen;
	tByte		mBlocked;
	tByte		mCorrespondingAIDOrderNumber;	// Order of the ADF in the AID list (application supported by terminal)

	// Extension to support PPSE
	tByte		mKernelIdentifier[8];			//0x9F2A
	tByte		mKernelIdentifierLen;
	tByte		mRequestedKernelId;
	tByte		mExtendedSelection[MAX_AID_LENGTH];			//0x9F29
	tByte		mExtendedSelectionLen;
} tADF;

tPSE

Code Block

language	c

typedef struct {
	tByte		mPSEName[MAX_AID_LENGTH]; 		//0x84
	tByte		mPSELen;
	tByte		mSFI; 			//0x88
	tByte		mLangagePreference[8]; 			//0x5F2D
	tByte		mLangagePreferenceLen;
	tByte		mIssuerCodeTableIndex; 			//0x9F11
	tByte		mRemainingFCI[MAX_REMAINING_FCI_LENGTH]; 			//0xBF0C. May contain Issuer Country Code 5F56 AND/OR Application Selection Flag DF62
	tByte		mRemainingFCILen;
} tPSE;

Agnos Database

See selection..h

--

adbGetVersionNumber

Provide Agnos database version. Get all pointers on shared RAM spaces provided by SAL/HAL and set adbAddTag strategy to STANDARD (i.e. EMVCo rule where update conditions are not checked)

adbResetDataBase

Reserved to Agnos core engine.

Reset database structure

adbSetStrategy

Reserved to Agnos core engine and contactless card processing.

By default, Agnos databse uses EMVco tags storage strategy where no check is performed on tags' update conditions. If a storage strategy is defined (by a contactless card processing) then:

If an AddTag_Contacltess callback is defined (by a contactless card processing), Agnos database calls the callback to check wheter a tag can be added
Else, Agnos database uses its default contactless storage strategy

adbAddTag

Reserved to Agnos core engine.

Check whether a tag may be added into EMV tags database. In order to store EMV tags directly into Agnos database, use agnSetAgnosDataBase primitive instead

adbAddUnknownTag

Add any tags into EMV tags database in “UnknowTag” bucket

adbGetUnknowTags

Get all tags stored into unknown tags bucket

adbGetUnknownTagsLength

Get the bucket’s length

adbGetUnknownTagsCount

Get tags count from the bucket

adbGetAllTLV

Get all TLV stored in AgnosDB

Code Block

tTagDataBase db;
unsigned char buffer[100]="";
unsigned short maxLength=100, actualLength=0;

aceOut(adbGetVersionNumber());

adbResetDataBase(&db);

adbGetAllTLV(&db,buffer,maxLength,&actualLength);
aceSendRawDD(buffer,actualLength);

adbAddUnknownTag(&db,(const unsigned char*)"\x9F\x02\x06\x99\x99\x99\x99\x99\x99",0x09);
adbGetAllTLV(&db,buffer,maxLength,&actualLength);
aceSendRawDD(buffer,actualLength);

Code Example
See emvco.c. and selectionlogic.h. They provide good examples on agnos.h and selection.h integration in the scope of contact card processing.

Versions Compared

Old Version 40

New Version 41

Key

EMV Core Engine

`#include`

`tTransactionalContext`

`agnGetVersionNumber`

`agnOpenSession`

`agnInitiateEMVTransaction`

`agnCompleteEMVTransaction`

`agnCloseSession`

Selection

`tADFList`

Agnos Database

Code Example