Difference between revisions of "83Plus:BCALLs:8111"
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| − | [[Category:83Plus:BCALLs:By Name:Display| | + | [[Category:83Plus:BCALLs:By Name:Display|Validate2048]] [[Category:83Plus:BCALLs:By Name|Validate2048]] [[Category:83Plus:BCALLs:By Address|8114 - Validate2048]][[Category:83Plus:BCALLs:By_Name:Cryptography|Validate2048]] |
== Synopsis == | == Synopsis == | ||
| − | '''Unofficial Name:''' | + | '''Unofficial Name:''' Validate2048 |
| − | '''BCALL Addresses:''' | + | '''BCALL Addresses:''' 8111h |
'''Minimum Hardware Version:''' 3 | '''Minimum Hardware Version:''' 3 | ||
| − | This is the bcall that TI added to boot code 1.03 to prevent downgrading. It MD5 hashes the OS and compares it with the transformation of the signature that is on page 73h. For this transformation, the key is | + | This is the bcall that TI added to boot code 1.03 to prevent downgrading. It MD5 hashes the OS and compares it with the transformation of the signature that is on page 73h. For this transformation, the key is 2048 bits and e = 65537. |
=== Inputs === | === Inputs === | ||
| − | * | + | * 8271h - Number of pages in the OS |
| − | * | + | * 8272h - Table listing all of the pages with OS code on them |
=== Outputs === | === Outputs === | ||
Latest revision as of 14:16, 31 August 2011
Synopsis
Unofficial Name: Validate2048
BCALL Addresses: 8111h
Minimum Hardware Version: 3
This is the bcall that TI added to boot code 1.03 to prevent downgrading. It MD5 hashes the OS and compares it with the transformation of the signature that is on page 73h. For this transformation, the key is 2048 bits and e = 65537.
Inputs
- 8271h - Number of pages in the OS
- 8272h - Table listing all of the pages with OS code on them
Outputs
- Z flag on success
Destroys
- All
Comments
This routine takes a very long time to run.
