Otaman — APDU Helper

Standalone offline HTML/JS tool for building APDU commands for SIM, USIM, and GlobalPlatform RAM, plus encoding conversions.

Open index.html in any modern browser. No server required.

Interface

Four tabs, each with a form and a "Сгенерировать" button. The output textarea contains the bare APDU hex string (no SPI/KIC/KID/TAR header).

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SIM Tab

CLA = A0 (GSM 11.11 / ISO 7816-4).

Commands

Command	INS	Description
SELECT	A4	Select EF/DF by FID, path, dfname, or chain
UPDATE RECORD	DC	Update a record in a record-oriented EF
UPDATE BINARY	D6	Update binary content at an offset
READ RECORD	B2	Read a record
READ BINARY	B0	Read binary content
ERASE BINARY	0E	Erase binary at an offset
ACTIVATE FILE	44	Activate a file
DEACTIVATE FILE	04	Deactivate a file
VERIFY PIN	20	Verify PIN1 or PIN2
CHANGE PIN	24	Change PIN1 or PIN2

SELECT methods

Method	P1	P2	Input
По FID	00	00	2-byte FID (4 hex)
По полному пути от MF	08	00	Full path hex from MF
По DF name / AID	04	00	AID (application ID)
ADF RFM цепочка	00	00	Comma-separated FIDs, each selected in turn

Options

• Начать с SELECT — checkbox to prepend a SELECT command before the operation. When unchecked, the operation is sent standalone with CLA.
• Режим выборки (P2) — for record commands: Absolute (04), Next (06), Previous (02).
• Размер записи — pad/truncate data to the specified byte count.
• Переопределить P1/P2 — checkbox to enable manual override of P1/P2 bytes.

References

• ISO/IEC 7816-4: Organization, security and commands for interchange
• ETSI TS 102 226: Remote APDU structure for UICC based applications
• GSM 11.11: SIM-ME Interface

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USIM Tab

CLA = 00 (ETSI TS 102 221). Same commands as SIM, but SELECT uses P1=09, P2=0C (by FID from current directory).

References

• ETSI TS 102 221: UICC-Terminal Interface; Physical and Logical Characteristics
• ETSI TS 102 226: Remote APDU structure for UICC based applications

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RAM Tab

CLA = 80 (GlobalPlatform Card Specification v2.3.1). Remote Application Management commands for card content management.

Commands

Command	INS	P1	Description
INSTALL [for load]	E6	02	Register a load file for loading
INSTALL [for install]	E6	0C	Install an application or SD
INSTALL [for make selectable]	E6	10	Make an application selectable
INSTALL [for registry update]	E6	01	Update registry entries
INSTALL [for extradition]	E6	04	Extradition (move between SDs)
LOAD	E8	00	Load executable code blocks
DELETE	E4	00/80	Delete application or SD
GET STATUS	F2	80/40/20/10	Get card status
GET DATA	CA	tag	Read card data objects
STORE DATA	E2	00/40/80/C0	Store data (key, certificate, etc.)
SET STATUS	F0	80/40/60	Lifecycle state management
EXTERNAL AUTHENTICATE	82	00	SCP host authentication
INTERNAL AUTHENTICATE	88	00	Card challenge-response

INSTALL [for install] — Privilege Builder

Tag C7 in the INSTALL data field. Built from 3 privilege bytes (GP spec Tables 11-7, 11-8, 11-9):

Byte 1 (bits):

Bit	Privilege
b8	Security Domain
b7	DAP Verification
b6	Delegated Management
b5	Card Lock
b4	Card Terminate
b3	Card Reset
b2	CVM Management

Byte 2 (bits):

Bit	Privilege
b8	Trusted Path
b7	Authorized Management
b6	Token Verification
b5	Global Delete
b4	Global Lock
b3	Global Registry
b2	Final Application

Byte 3 (bits):

Bit	Privilege
b8	Receipt Generation

INSTALL [for install] — SIM/UICC Toolkit Parameters

Optional TLV objects appended to the INSTALL data field:

• Tag CA (SIM Toolkit): Priority, Timers, Text Length, Menu Entries, Menu Positions, Channels, MSL, TAR, Access Domain
• Tag 80 (UICC Toolkit, inside EA): Same fields minus Access Domain

MSL (Minimum Security Level) — SPI1 byte per TS 102 225:

Value	Meaning
00	No check
11	RC/CC/DS
12	RC/DS/CC
15	RC/DS/CC + MAC
16	RC/DS/CC + MAC + Cipher
19	RC/DS/CC + MAC + Cipher + DS

GET STATUS P1 values

Value	Meaning
80	Issuer Security Domain (ISD)
40	Applications and Supplementary Security Domains
20	Executable Load Files
10	ELF and their Executable Modules

DELETE P1 values

Value	Meaning
00	By AID
80	Delete associated objects

STORE DATA P1 values

Value	Meaning
00	Last block, no encryption
40	More blocks, no encryption
80	Last block, encrypted
C0	More blocks, encrypted

SET STATUS parameters

P1 (Status Type):

Value	Target
80	Issuer Security Domain
40	Application or Supplementary Security Domain
60	Security Domain and its associated Applications

P2 (State):

Value	Action
00	Unlock (return to previous state)
80	Lock (LOCKED state)

References

• GlobalPlatform Card Specification v2.3.1 (GPC_Spec_v2.3.1): Commands, Privileges, TLV structures
• ETSI TS 102 226 V13.0.0 §8.2.1.3.2: SIM/UICC Toolkit parameters, MSL, TAR, Access Domain

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Конвертация Tab

Value encoding conversions.

IMSI → EF.IMSI

Per TS 31.102 §4.2.3. Encodes a 15-digit IMSI into the 9-byte EF.IMSI format:

• Byte 0: number of subsequent bytes (8)
• Odd/even indicator nibble in the last byte
• BCD digits, swapped nibble pairs per identity

Input: 15 decimal digits. Output: 18 hex characters.

MSISDN → BCD

Strips leading +, pads odd length with f, swaps nibble pairs.

ICCID → hex

Swaps nibble pairs of the ICCID string.

Provider Name → SPN

Per 3GPP TS 31.102 §4.2.5 (EF_SPN). Three encoding paths:

1. GSM 7-bit packed (all chars in GSM 7-bit default alphabet): prefix 01, DCS byte (spare bits), packed septets, 0xFF padding to 16 bytes.
2. UCS2 non-BMP (emoji / chars > U+FFFF): prefix 00, DCS 80, UTF-16BE, 0xFF padding to 16 bytes.
3. UCS2 BMP non-GSM7 (Cyrillic, etc.): prefix 00, DCS 81, base byte, per-char offsets, 0xFF padding to 16 bytes.

GSM 7-bit alphabet per 3GPP TS 23.038. Full extension table supported.

PLMN → EF_PLMNsel

Per TS 31.102 §4.2.3 (EF_PLMNsel). 3-byte BCD encoding:

• Byte 1: MCC digit 2 | MCC digit 1
• Byte 2: MNC digit 3 | MCC digit 3
• Byte 3: MNC digit 2 | MNC digit 1

Input: MCC (3 digits), MNC (2-3 digits). Output: 6 hex characters.

PLMNwAcT → EF_PLMNwAcT

Per TS 31.102. Same 3-byte PLMN + 2-byte Access Technology selector.

AcT values:

Value	Technologies
8000	GSM
4000	UTRAN
2000	E-UTRAN
1000	NGRAN
C000	GSM + UTRAN
6000	UTRAN + E-UTRAN
E000	GSM + UTRAN + E-UTRAN
F000	All

References

• 3GPP TS 31.102: Characteristics of the USIM Application
• 3GPP TS 23.038: Alphabets and language information
• ETSI TS 102 225: Secured packet structure for (U)SIM toolkit
• pySim: enc_imsi() implementation