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1 BSI-DSZ-CC for Infineon smart card IC (Security Controller) M7820 A11 and M11 with optional RSA2048/4096 v , EC v , SHA-2 v1.01 and Toolbox v libraries and with specific IC dedicated software from Infineon Technologies AG
2 BSI - Bundesamt für Sicherheit in der Informationstechnik, Postfach , D Bonn Phone +49 (0) , Fax +49 (0) , Infoline +49 (0) Certification Report V1.0 CC-Zert-327 V4.64
3 BSI-DSZ-CC Infineon smart card IC (Security Controller) M7820 A11 and M11 with optional RSA2048/4096 v , EC v , SHA-2 v1.01 and Toolbox v libraries and with specific IC dedicated software from Infineon Technologies AG PP Conformance: Security IC Platform Protection Profile, Version 1.0, 15 June 2007, BSI-CC-PP Functionality: Assurance: PP conformant plus product specific extensions Common Criteria Part 2 extended Common Criteria Part 3 conformant EAL 5 augmented by ALC_DVS.2 and AVA_VAN.5 Common Criteria Recognition Arrangement for components up to EAL 4 The IT product identified in this certificate has been evaluated at an approved evaluation facility using the Common Methodology for IT Security Evaluation (CEM), Version 3.1 extended by advice of the Certification Body for components beyond EAL 5 and guidance specific for the technology of the product for conformance to the Common Criteria for IT Security Evaluation (CC), Version 3.1. This certificate applies only to the specific version and release of the product in its evaluated configuration and in conjunction with the complete Certification Report. The evaluation has been conducted in accordance with the provisions of the certification scheme of the German Federal Office for Information Security (BSI) and the conclusions of the evaluation facility in the evaluation technical report are consistent with the evidence adduced. This certificate is not an endorsement of the IT product by the Federal Office for Information Security or any other organisation that recognises or gives effect to this certificate, and no warranty of the IT product by the Federal Office for Information Security or any other organisation that recognises or gives effect to this certificate, is either expressed or implied. Bonn, 5 September 2012 For the Federal Office for Information Security Bernd Kowalski Head of Department L.S. Bundesamt für Sicherheit in der Informationstechnik Godesberger Allee D Bonn - Postfach D Bonn Phone +49 (0) Fax +49 (0) Infoline +49 (0)
4 Certification Report BSI-DSZ-CC This page is intentionally left blank. 4 / 46
5 BSI-DSZ-CC Certification Report Preliminary Remarks Under the BSIG 1 Act, the Federal Office for Information Security (BSI) has the task of issuing certificates for information technology products. Certification of a product is carried out on the instigation of the vendor or a distributor, hereinafter called the sponsor. A part of the procedure is the technical examination (evaluation) of the product according to the security criteria published by the BSI or generally recognised security criteria. The evaluation is normally carried out by an evaluation facility recognised by the BSI or by BSI itself. The result of the certification procedure is the present Certification Report. This report contains among others the certificate (summarised assessment) and the detailed Certification Results. The Certification Results contain the technical description of the security functionality of the certified product, the details of the evaluation (strength and weaknesses) and instructions for the user. 1 Act on the Federal Office for Information Security (BSI-Gesetz - BSIG) of 14 August 2009, Bundesgesetzblatt I p / 46
6 Certification Report BSI-DSZ-CC Contents A Certification Specifications of the Certification Procedure Recognition Agreements European Recognition of ITSEC/CC Certificates (SOGIS-MRA) International Recognition of CC Certificates (CCRA) Performance of Evaluation and Certification Validity of the Certification Result Publication...9 B Certification Results Executive Summary Identification of the TOE Security Policy Assumptions and Clarification of Scope Architectural Information Documentation IT Product Testing Evaluated Configuration Results of the Evaluation CC specific results Results of cryptographic assessment Obligations and Notes for the Usage of the TOE Security Target Definitions Acronyms Glossary Bibliography...29 C Excerpts from the Criteria...31 D Annexes / 46
7 BSI-DSZ-CC Certification Report A Certification 1 Specifications of the Certification Procedure The certification body conducts the procedure according to the criteria laid down in the following: BSIG 2 BSI Certification Ordinance 3 BSI Schedule of Costs 4 Special decrees issued by the Bundesministerium des Innern (Federal Ministry of the Interior) DIN EN standard BSI certification: Procedural Description (BSI 7125) [3] Common Criteria for IT Security Evaluation (CC), Version [1] Common Methodology for IT Security Evaluation, Version 3.1 [2] BSI certification: Application Notes and Interpretation of the Scheme (AIS) [4] 2 Recognition Agreements In order to avoid multiple certification of the same product in different countries a mutual recognition of IT security certificates - as far as such certificates are based on ITSEC or CC - under certain conditions was agreed. 2.1 European Recognition of ITSEC/CC Certificates (SOGIS-MRA) The basic recognition level includes Common Criteria (CC) Evaluation Assurance Levels EAL1 to EAL4 and ITSEC Evaluation Assurance Levels E1 to E3 (basic). For higher recognition levels the technical domain Smart card and similar Devices has been defined. It includes assurance levels beyond EAL4 resp. E3 (basic). In Addition, certificates issued for Protection Profiles based on Common Criteria are part of the recognition agreement. As of September 2011 the new agreement has been signed by the national bodies of Austria, Finland, France, Germany, Italy, The Netherlands, Norway, Spain, Sweden and the United Kingdom.Details on recognition and the history of the agreement can be found at 2 Act on the Federal Office for Information Security (BSI-Gesetz - BSIG) of 14 August 2009, Bundesgesetzblatt I p Ordinance on the Procedure for Issuance of a Certificate by the Federal Office for Information Security (BSI-Zertifizierungsverordnung, BSIZertV) of 07 July 1992, Bundesgesetzblatt I p Schedule of Cost for Official Procedures of the Bundesamt für Sicherheit in der Informationstechnik (BSI-Kostenverordnung, BSI-KostV) of 03 March 2005, Bundesgesetzblatt I p Proclamation of the Bundesministerium des Innern of 12 February 2007 in the Bundesanzeiger dated 23 February 2007, p / 46
8 Certification Report BSI-DSZ-CC The SOGIS-MRA logo printed on the certificate indicates that it is recognised under the terms of this agreement by the nations listed above. 2.2 International Recognition of CC Certificates (CCRA) An arrangement (Common Criteria Recognition Arrangement) on the mutual recognition of certificates based on the CC Evaluation Assurance Levels up to and including EAL 4 has been signed in May 2000 (CCRA). It includes also the recognition of Protection Profiles based on the CC. As of September 2011 the arrangement has been signed by the national bodies of: Australia, Austria, Canada, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, India, Israel, Italy, Japan, Republic of Korea, Malaysia, The Netherlands, New Zealand, Norway, Pakistan, Republic of Singapore, Spain, Sweden, Turkey, United Kingdom, United States of America. The current list of signatory nations and approved certification schemes can be seen on the website: The Common Criteria Recognition Arrangement logo printed on the certificate indicates that this certification is recognised under the terms of this agreement. The Common Criteria Recognition Arrangement logo printed on the certificate indicates that this certification is recognised under the terms of this agreement. This evaluation contains the components ALC_DVS.2, AVA_VAN.5, ADV_FSP.5, ADV_INT.2, ADV_TDS.4, ALC_CMS.5, ALC_TAT.2 and ATE_DPT.3 that are not mutually recognised in accordance with the provisions of the CCRA. For mutual recognition the EAL4 components of these assurance families are relevant. 3 Performance of Evaluation and Certification The certification body monitors each individual evaluation to ensure a uniform procedure, a uniform interpretation of the criteria and uniform ratings. The product Infineon smart card IC (Security Controller) M7820 A11 and M11 with optional RSA2048/4096 v , EC v , SHA-2 v1.01 and Toolbox v libraries and with specific IC dedicated software has undergone the certification procedure at BSI. This is a re-certification based on BSI-DSZ-CC Specific results from the evaluation process BSI-DSZ-CC were re-used. The evaluation of the product Infineon smart card IC (Security Controller) M7820 A11 and M11 with optional RSA2048/4096 v , EC v , SHA-2 v1.01 and Toolbox v libraries and with specific IC dedicated software was conducted by TÜV Informationstechnik GmbH. The evaluation was completed on 29 August The TÜV Informationstechnik GmbH is an evaluation facility (ITSEF) 6 recognised by the certification body of BSI. For this certification procedure the sponsor and applicant is: Infineon Technologies AG. The product was developed by: Infineon Technologies AG. The certification is concluded with the comparability check and the production of this Certification Report. This work was completed by the BSI. 6 Information Technology Security Evaluation Facility 8 / 46
9 BSI-DSZ-CC Certification Report 4 Validity of the Certification Result This Certification Report only applies to the version of the product as indicated. The confirmed assurance package is only valid on the condition that all stipulations regarding generation, configuration and operation, as given in the following report, are observed, the product is operated in the environment described, as specified in the following report and in the Security Target. For the meaning of the assurance levels please refer to the excerpts from the criteria at the end of the Certification Report. The Certificate issued confirms the assurance of the product claimed in the Security Target at the date of certification. As attack methods evolve over time, the resistance of the certified version of the product against new attack methods needs to be re-assessed. Therefore, the sponsor should apply for the certified product being monitored within the assurance continuity program of the BSI Certification Scheme (e.g. by a re-certification). Specifically, if results of the certification are used in subsequent evaluation and certification procedures, in a system integration process or if a user's risk management needs regularly updated results, it is recommended to perform a re-assessment on a regular e.g. annual basis. In case of changes to the certified version of the product, the validity can be extended to the new versions and releases, provided the sponsor applies for assurance continuity (i.e. re-certification or maintenance) of the modified product, in accordance with the procedural requirements, and the evaluation does not reveal any security deficiencies. 5 Publication The product Infineon smart card IC (Security Controller) M7820 A11 and M11 with optional RSA2048/4096 v , EC v , SHA-2 v1.01 and Toolbox v libraries and with specific IC dedicated software has been included in the BSI list of certified products, which is published regularly (see also Internet: and [5]). Further information can be obtained from BSI-Infoline Further copies of this Certification Report can be requested from the developer 7 of the product. The Certification Report may also be obtained in electronic form at the internet address stated above. 7 Infineon Technologies AG Am Campeon Neubiberg 9 / 46
10 Certification Report BSI-DSZ-CC This page is intentionally left blank. 10 / 46
11 BSI-DSZ-CC Certification Report B Certification Results The following results represent a summary of the Security Target of the sponsor for the Target of Evaluation, the relevant evaluation results from the evaluation facility, and complementary notes and stipulations of the certification body. 11 / 46
12 Certification Report BSI-DSZ-CC Executive Summary The Target of Evaluation (TOE) is Infineon smart card IC (Security Controller) M7820 A11 and M11 with optional RSA2048/4096 v , EC v , SHA-2 v1.01 and Toolbox v libraries and with specific IC dedicated software. The TOE provides a real 16-bit CPU-architecture. The major components of the core system are the two CPUs (Central Processing Units), the MMU (Memory Management Unit) and MED (Memory Encryption/Decryption Unit). The two CPUs control each other in order to detect faults and serve by this for data integrity. The TOE implements a full 16 MByte linear addressable memory space for each privilege level, a simple scalable Memory Management concept and a scalable stack size. The flexible memory concept consists of ROM- and Flash-memory as part of the non volatile memory (NVM), respectively Infineon SOLID FLASH 8. The co-processor block contains the processors for RSA/EC and DES/AES processing, while the peripheral block contains the random number generation and the external interfaces service. The peripheral block contains also the timers and a watchdog. All data of the memory block is encrypted and all memory types are equipped with an error detection code (EDC), the Infineon SOLID FLASH in addition with an error correction code (ECC). The security modules serve for operation within the specified range and manage the alarms. The RMS library providing some functionality via an API to the Smartcard Embedded Software contains for example Infineon SOLID FLASH service routines. The Service Algorithm provides functionality for the tearing save write into the Infineon SOLID FLASH. The STS firmware is used for test purposes during start-up and the Flash Loader allows downloading user software to the NVM during the manufacturing process. The STS is implemented in a separated Test-ROM being part of the TOE. This dual interface controller is able to communicate using either the contact based or the contactless interface. The implemented dual interface provides a maximum flexibility in using following communication protocols respectively methods: ISO 7816, ISO Type A, ISO14443 Type B, ISO/IEC passive mode, Mifare compatible Interface or, The digital Contactless Bridge mode (DCLB), Advance Communication Mode (ACM). The DCLB mode is provided by the specific TOE derivatives as listed in Table 4 and enables the use of an external analogue interface or near field communication (NFC) modem via the ISO-pads. Those external analogue modems are typically deemed for applications running in mobile devices and are not part of this TOE. In case of the available DCLB mode, the part of the contactless interface using the external antenna is out of operation. Whether the DCLB option is available or not is a configuration applied in TOE production which can not be changed afterwards. 8 SOLID FLASH is an Infineon Trade Mark and stands for Flash EEPROM technology. 12 / 46
13 BSI-DSZ-CC Certification Report The availability of the DCLB mode is configured during TOE production and depends on the customer order. Regarding the DCLB enabled derivates it depends on the operating system of how the pads are used. The block diagram of the TOE is shown in [6], Figure 1. For more details please refere to [6, chapter 2.1). This TOE is intended to be used in smart cards or any other form factor for particularly security relevant applications and for its previous use as developing platform for smart card operating systems or similar according to the life cycle model from [7]. The term Smartcard Embedded Software is used in the following for all operating systems and applications stored and executed on the TOE. The TOE is the platform for the Smartcard Embedded Software. The Smartcard Embedded Software itself is not part of the TOE. All products based on the M7820 representing this TOE are identically from hardware perspective and produced with the same masks. The first metal mask (called M1 mask) contains the derivate specific information (e.g. development code, first digit of the design step and i.e. ROM mask data). Depending on the blocking configuration an M7820 product can have different user available memory sizes and can come with or without individual accessible cryptographic co-processors. For example a product with the M-number M7820 in the field can come in one project with the fully available Infineon SOLID FLASH or in another project with equal or any other Infineon SOLID FLASH -size below the physical implementation size, depending on the user requirements. And more, the user is free to choice prior to production, whether he needs the symmetric co-processor SCP, or the asymmetric co-processor Crypto2304T, or both, or none of them. In addition, the user is also free to choice whether the TOE comes with a free combination of delivered cryptographic libraries or without any. The entire configuration is done during the manufacturing process of the TOE according to the choice of the user. All differences between the products of this TOE are realized by means of blocking without changing the hardware. Therefore, all products of this TOE are equal from hardware perspective. The blocking of the Infineon SOLID FLASH is done by setting the according value in the chip configuration page, which is not available to the user. The same means of blocking are also used for switching on and off the accessibility of the cryptographic coprocessors SCP and/or Crypto2304T and also for the configuration of the XRAM- and ROM-sizes. The memory settings are done during the production process by programming the physical start and end-address of the user available memory areas. The entire configuration page including also the other blocking information can not be changed by the user afterwards and is protected against manipulation. For more details please refer to the Security Target [6], chapter 1. This TOE is equipped with Flash Loader Software (FL) to allow the download of user software, i.e. the operating system and applications. Various options can be chosen by the user to implement his software during production. For more details please refer to the Security Target [6], chapter 1. The Security Target [6] is the basis for this certification. It is based on the certified Protection Profile Security IC Platform Protection Profile, Version 1.0, 15 June 2007, BSI- CC-PP [7]. The TOE Security Assurance Requirements (SAR) are based entirely on the assurance components defined in Part 3 of the Common Criteria (see part C or [1], Part 3 for details). 13 / 46
14 Certification Report BSI-DSZ-CC The TOE meets the assurance requirements of the Evaluation Assurance Level EAL 5 augmented by ALC_DVS.2 and AVA_VAN.5. The TOE Security Functional Requirements (SFR) relevant for the TOE are outlined in the Security Target [6], chapter 7. They are selected from Common Criteria Part 2 and some of them are newly defined. Thus the TOE is CC Part 2 extended. The TOE Security Functional Requirements are implemented by the following TOE Security Features: TOE Security Features Addressed issue SF_DPM SF_PS SF_PMA SF_PLA SF_CS Device Phase Management Protection against Snooping Protection against Modification Attacks Protection against Logical Attacks Cryptographic Support Table 1: TOE Security Functionalities For more details please refer to the Security Target [6], chapter 8. The assets to be protected by the TOE are defined in the Security Target [6], chapter Based on these assets the TOE Security Environment is defined in terms of Assumptions, Threats and Organisational Security Policies. This is outlined in the Security Target [6], chapter 4.2. The TOE has various configurations. The entire configuration is done during the manufacturing process of the TOE according to the choice of the user. All differences between the products of this TOE are realized by means of blocking without changing the hardware. Therefore, all products of this TOE are equal from the hardware perspective. Please refer to chapter 8 for more details about the configurations. The vulnerability assessment results as stated within this certificate do not include a rating for those cryptographic algorithms and their implementation suitable for encryption and decryption (see BSIG Section 9, Para. 4, Clause 2). The certification results only apply to the version of the product indicated in the certificate and on the condition that all the stipulations are kept as detailed in this Certification Report. This certificate is not an endorsement of the IT product by the Federal Office for Information Security (BSI) or any other organisation that recognises or gives effect to this certificate, and no warranty of the IT product by BSI or any other organisation that recognises or gives effect to this certificate, is either expressed or implied. 2 Identification of the TOE The Target of Evaluation (TOE) is called: Infineon smart card IC (Security Controller) M7820 A11 and M11 with optional RSA2048/4096 v , EC v , SHA-2 v1.01 and Toolbox v libraries and with specific IC dedicated software 14 / 46
15 BSI-DSZ-CC Certification Report The following table outlines the TOE deliverables: No Type Identifier Release Form of delivery 1a HW M7820 Smart Card IC A11 (produced in Dresden) 1b HW M7820 Smart Card IC M11 (produced in Burlington) 2 FW Flash Loader V and FL patch version V FW STS Self Test Software (the IC Dedicated Test Software) 4 FW RMS Resource Management System (the IC Dedicated Support Software) V and STS patch version V800B V8000B001B and overall patch FW SAM library V20.22 and overall patch SW 9 ROM code (including Embedded Software and crypto libraries) 7 SW 10 NVM image (including Embedded Software and crypto libraries) 8 SW RSA library (optional) RSA2048 v Complete module, package, with or without inlay antenna mounting, in form of plain wafers, in an IC case or in bare dies. Complete module, package, with or without inlay antenna mounting, in form of plain wafers, in an IC case or in bare dies. Stored in reserved area of User ROM on the IC (patch in NVM) Stored in Test ROM on the IC (patch in NVM) Stored in reserved area of User ROM on the IC (patch in NVM) Stored in reserved area of User ROM on the IC (patch in NVM) Stored in User ROM on the IC Stored in Flash memory on the IC RSA4096 v Object code in electronic form 9 SW EC library (optional) EC v Object code in electronic form 10 SW SHA-2 library (optional) SHA-2v1.01 Object code in electronic form 11 SW Toolbox (optional) Toolbox v Object code in electronic form 12 DOC SLx 70 Family Hardware Reference Manual 13 DOC M7801 / M7820 Controller Family for Security Applications Errata Sheet Hardcopy or pdf-file Hardcopy or pdf-file 9 Only in case the IC Embedded Software Developer provides Infineon with code for ROM. 10 Only in case the IC Embedded Software Developer provides Infineon with code for Flash memory. 15 / 46
16 Certification Report BSI-DSZ-CC No Type Identifier Release Form of delivery 14 DOC M7801/M7820 Controller Security Guidelines User Manual 15 DOC SLE 70 Family Programmer s Reference User s Manual 16 DOC SLE70 Asymmetric Crypto Library for RSA / ECC / Toolbox ( ) Hardcopy or pdf-file Hardcopy and pdf-file Hardcopy and pdf-file 17 DOC User Manual Hardcopy and pdf-file 18 DOC SLx70 Family Secure Hash Algorithm SHA-2 (SHA 256/224, SHA 512/384) Library Version V DOC SLx 70 Family Production and Personalization User s Manual Hardcopy and pdf-file Hardcopy and pdf-file Table 2: Deliverables of the TOE A processing step during production testing incorporates the chip-individual features into the hardware of the TOE. The individual TOE hardware is uniquely identified by its serial number. The serial number comprises the lot number, the wafer number and the coordinates of the chip on the wafer. Each individual TOE can therefore be traced unambiguously and thus assigned to the entire development and production process. The hardware part of the TOE is identified by M7820 A11 and M11 (design step A11: produced in Dresden/Germany and design step M11: produced in Burlington/USA). Another characteristic of the TOE are the chip identification data. These chip identification data are chip specific as they contain: ROM type (individual coding of each customer ROM) Chip type (Development code and design step code) Batch number (Fab number, year, business week, lot number) Wafer number Die position (x-y-position of die on wafer) STS version STS patch version SAM version RMS build version Overall patch version In the field, the IC Embedded Software Developer can clearly identify a product in question by the ChipIdent function and the user guidance, whereas an additional RMS function provides the complete chip configuration. Thereby, the exact and clear identification of any product with its exact configuration of this TOE is given. All Chip Types included in this evaluation are listed in the table / 46
17 BSI-DSZ-CC Certification Report Different Chip Type codes exist for different design versions (e.g. M7820 A11 and M7820 M11). The chip type, version number and the fabrication facility are coded in the chip identification data as follows [12], chapter The TOE consists of the hardware part, the firmware parts and the software parts. The software parts are differentiated into: the cryptographic libraries RSA, EC and SHA-2 and the supporting libraries Toolbox and Base. RSA, EC, SHA-2 and Toolbox provide certain functionality via an API to the Smartcard Embedded Software. The Base Library is only used internally by the RSA, EC and Toolbox libraries and has no user interface. If none the three libraries RSA, EC and Toolbox is delivered, also the Base Library is not on board. The SHA-2 library does not use the Base Library. The firmware parts are the RMS library, the Service Algorithm Minimal (SAM), the STS firmware for test purpose, providing some functionality via an API to the Smartcard Embedded Software, the Flash Loader for downloading user software to the NVM and the Mifare compatible software interface. The STS is implemented in a separated Test-ROM being part of the TOE. The Smartcard Embedded Software, i.e. the operating system and applications are not part of the TOE. The RSA library is used to provide a high level interface to RSA (Rivest, Shamir, Adleman) cryptography implemented on the hardware component Crypto2304T and includes countermeasures against SPA, DPA and DFA attacks. The routines are used for the generation of RSA Key Pairs (RsaKeyGen), the RSA signature verification (RsaVerify), the RSA signature generation (RsaSign) and the RSA modulus recalculation (RsaModulus). The hardware Crypto2304T unit provides the basic long number calculations (add, subtract, multiply, square with 1100 bit numbers) with high performance. The RSA library is delivered as object code and in this way integrated in the user software. Firmware Type Name Version number / patch Flash loader Flash loader patch RMS SAM Overall patch version (includes patches for SAM, RMS and Mifare 11 ) STS STS patch V V V8000 B001B V V V800B Software RSA crypto library (optional) RSA2048 v EC library (optional) RSA4096 v EC v SHA-2 library (optional) SHA-2 v1.01 Toolbox (optional) Table 3: TOE Identification (Firmware and software parts) Toolbox v Note that Mifare is part of the RMS and mentioned here only for sake of consistency with [12]. 17 / 46
18 Certification Report BSI-DSZ-CC The EC library is used to provide a high level interface to Elliptic Curve cryptography implemented on the hardware component Crypto2304T and includes countermeasures against SPA, DPA and DFA attacks. The routines are used for ECDSA signature generation, ECDSA signature verification, ECDSA key generation and Elliptic Curve Diffie- Hellman key agreement. In addition, the EC library provides an additional function for calculating primitive elliptic curve operations like EC Add and EC Double. EC curves over prime field Fp, as well as over GF(2n) finite field are supported too. The EC library is delivered as object code and in this way integrated in the user software. The SHA-library provides the calculation of a hash value of freely chosen data input in the CPU. The SHA-library is delivered as object code and is in this way available for the user software. This secure hash-algorithm SHA-2 is intended to be used for signature generation, verification and generic data integrity checks. The use for keyed hash operations like HMAC or similar security critical operations involving keys, is not subject of this TOE and requires specific security improvements and DPA analysis including the operating system, which is not part of this TOE. The toolbox library does not provide cryptographic support or additional security functionality as it provides only the following basic long integer arithmetic and modular functions in software, supported by the cryptographic coprocessor: Addition, subtraction, division, multiplication, comparison, reduction, modular addition, modular subtraction, modular multiplication, modular inversion and modular exponentiation. No security relevant policy, mechanism or function is supported. The toolbox library is deemed for software developers as support for simplified implementation of long integer and modular arithmetic operations. The Base Library provides the low level interface to the asymmetric cryptographic coprocessor and has no user available interface. The base library does not provide any security functionality, implements no security mechanism, and does not provide additional specific security functionality. The cryptographic libraries RSA, EC, SHA-2 and the Toolbox library are delivery options. If one of the libraries RSA, EC and Toolbox or combination hereof are delivered, the Base Library is automatically part of it. The TOE may come with free combinations of or even without these libraries. In the case of coming without one or any combination of the cryptographic libraries RSA, EC and SHA-2, the TOE does not provide the Additional Specific Security Functionality Rivest-Shamir-Adleman Cryptography (RSA) and/or Elliptic Curve Cryptography (EC) and/or SHA-2. The Toolbox and Base Library are no cryptographic libraries and provide no additional specific security functionality. For more details please refer to [6], chapter Security Policy The Security Policy is expressed by the set of Security Functional Requirements and implemented by the TOE. It covers the following issues: Symmetric cryptographic block cipher algorithms (Triple-DES and AES), to ensure the confidentiality of plain text data by encryption and to support secure authentication protocols and it will provide a random number generation of appropriate quality. The RSA library is used to provide a high level interface to RSA (Rivest, Shamir, Adleman) cryptography implemented on the hardware component Crypto2304T and includes countermeasures against SPA, DPA and DFA attacks. The EC library is used to provide a high level interface to Elliptic Curve cryptography implemented on the hardware 18 / 46
19 BSI-DSZ-CC Certification Report component Crypto2304T and includes countermeasures against SPA, DPA and DFA attacks. The SHA-library provides the calculation of a hash value of freely chosen data input in the CPU. As the TOE is a hardware security platform, the security policy of the TOE is also to provide protection against leakage of information (e.g. to ensure the confidentiality of cryptographic keys during AES, Triple-DES, RSA and EC cryptographic functions performed by the TOE), against physical probing, against malfunctions, against physical manipulations and against abuse of functionality. Hence the TOE shall maintain the integrity and the confidentiality of data stored in the memory of the TOE and maintain the integrity, the correct operation and the confidentiality of security functionalities (security mechanisms and associated functions) provided by the TOE. 4 Assumptions and Clarification of Scope The Assumptions defined in the Security Target and some aspects of Threats and Organisational Security Policies are not covered by the TOE itself. These aspects lead to specific security objectives to be fulfilled by the TOE-Environment. The following topics are of relevance: protection during packaging, finishing and personalization, usage of hardware platform and treatment of user data. Details can be found in the Security Target [6], chapter Architectural Information The TOE is an integrated circuits (IC) providing a platform to a smart card operating system and smart card application software. A top level block diagram and a list of subsystems can be found within the TOE description of the Security Target [6], chapter 2.1. The TOE provides a real 16-bit CPU-architecture. The major components of the core system are the two CPUs (Central Processing Units), the MMU (Memory Management Unit) and MED (Memory Encryption/Decryption Unit). The two CPUs control each other in order to detect faults and serve by this for data integrity. The TOE implements a full 16 MByte linear addressable memory space for each privilege level, a simple scalable Memory Management concept and a scalable stack size. The flexible memory concept consists of ROM- and Flash-memory as part of the non volatile memory (NVM), respectively Infineon SOLID FLASH. The two cryptographic co-processors serve the need of modern cryptography: The symmetric co-processor (SCP) combines both AES and Triple-DES with dual-key or triplekey hardware acceleration. The Asymmetric Crypto Co-processor, called Crypto2304T in the following, is an optimized version of the used in the SLE88-family with performance improvements for RSA-2048 bit (4096-bit with CRT) and Elliptic Curve (EC) cryptography. The software part of the TOE consists of the cryptographic RSA-, EC- and the SHA-2 libraries and the supporting Toolbox and Base libraries. If RSA or EC or Toolbox or combinations hereof are part of the shipment, automatically the Base Library is included. Part of the evaluation are the RSA straight operations with key length from 1024 Bits to 2048 Bits, and the RSA CRT operations with key lengths of 1024 Bits to 4096 Bits. Note 19 / 46
20 Certification Report BSI-DSZ-CC that key lengths below 1024 Bits are not included in the certificate. The RSA library is delivered as object code and in this way integrated in the user software. The RSA library can perform RSA operations from 512 to 4096 bits. Depending on the customer s choice, the TOE can be delivered with the 4096 code portion or with the 2048 code portion only. The 2048 code portion is included in both. For more details please refer to the Security Target [6], chapter 1.2 and Documentation The evaluated documentation as outlined in table 2 is being provided with the product to the customer. This documentation contains the required information for secure usage of the TOE in accordance with the Security Target. Additional obligations and notes for secure usage of the TOE as outlined in chapter 10 of this report have to be followed. 7 IT Product Testing The tests performed by the developer were divided into six categories: 1. technology development tests as the earliest tests to check the technology against the specification and to get the technology parameters used in simulations of the circuitry (this testing is not strictly related to Security Functionalities); 2. tests which are performed in a simulation environment with different tools for the analogue circuitries and for the digital parts of the TOE; 3. regression tests of the hardware within a simulation environment based on special software dedicated only for the regression tests; 4. regression tests which are performed for the IC Dedicated Test Software and for the IC Dedicated Support Software on emulator versions of the TOE and within a software simulation of chip in special hardware; 5. characterisation and verification tests to release the TOE to production: a) used to determine the behaviour of the chip with respect to different operating conditions and varied process parameters (often also referred to as characterisation tests); b) special verification tests for Security Functionalities which were done with samples of the TOE (referred also as developers security evaluation) and which include also layout tests by automatic means and optical control, in order to verify statements concerning the layout; 6. functional production tests, which are done for every chip to check its correct functionality as a last step of the production process (phase 3). The developer tests cover all Security Functionalities and all security mechanisms as identified in the Functional specification. The evaluators were able to repeat the tests of the developer either using the library of programs, tools and prepared chip samples delivered to the evaluator or at the developers site. They performed independent tests to supplement, augment and to verify the tests performed by the developer. The tests of the developer were repeated by sampling, by repetition of complete regression tests and by software routines developed by the 20 / 46
M7892 A21. Version 1.2, 2011-12-13 Author: Hans-Ulrich Buchmüller
M7892 A21 Security Target Lite Version 1.2, Author: Hans-Ulrich Buchmüller Public Chip Card & Security Edition Published by Infineon Technologies AG 81726 Munich, Germany 2012 Infineon Technologies AG