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Difference between revisions of "WildcardTicket"
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0x4 Encrypted Ticket |
0x4 Encrypted Ticket |
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| − | The ticket is decrypted with TEA in CBC mode using a key hashed from the |
+ | The ticket is decrypted with [[TEA]] in [[CBC mode]] using a key hashed from the [[NORID]], [[CHIPID]], [[wikipedia:IMEI|IMEI]] and a [[wikipedia:Salt (cryptography)|salt]]. The layout of the decrypted ticket looks like this: |
0x00 Certificate Length (in bits) |
0x00 Certificate Length (in bits) |
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Revision as of 06:33, 15 August 2010
The wildcard ticket is used for activating the baseband. It is stored in the file "/var/root/Library/Lockdown/activation_records/wildcard_record.plist". When activating an iPhone, the ticket is pulled from Apple's server and stored on the device. It contains all the information about sim-/netlocks. Factory- and carrier-unlocked devices receive a wildcard ticket with policies that permit all SIM cards.
Layout
0x0 Version number (=2 for iPhone 3G, 3GS) 0x4 Encrypted Ticket
The ticket is decrypted with TEA in CBC mode using a key hashed from the NORID, CHIPID, IMEI and a salt. The layout of the decrypted ticket looks like this:
0x00 Certificate Length (in bits) 0x04 Certificate Serial (usually 1) 0x08 Public Key Length (in bits) 0x0c Public Key Exponent 0x10-0x90 Public Key (RSA Key 3) 0x90-0x110 Additional Public Key - not in use 0x110-0x190 Certificate of the first 0x110 bytes signed with rsa_key2 0x190-0x19B ICCID mask (relevant bits for simlock) 0x19C-0x1A3 IMEI 0x1A4-0x1B7 Hash of several hardware IDs (IMEI, norID, chipID) 0x1B8-... Table of "policies" (netlock)
Attached to the decrypted ticket is a certificate (0x80 byte) signed with the RSA key 3 at 0x10.
