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mem info - now accepts input id to facility easy testing. Signature offset also triggers erase before to enable easy updates

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iceman1001 2021-03-07 08:56:36 +01:00
commit dff732840f
3 changed files with 59 additions and 18 deletions
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doc/ext_flash_notes.md
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@ -39,8 +39,8 @@ Page 3:
* used by Proxmark3 RDV4 specific functions: flash signature and keys dictionaries, see below for details
* to dump it: `mem dump f page3_dump o 196608 l 65536`
* to erase it:
* **Beware** it will erase your flash signature (see below) so better to back it up first as you won't be able to regenerate it by yourself!
* It's possible to erase completely page 3 by erase the entire flash memory with the voluntarily undocumented command `mem wipe i`.
* **Beware** it will erase your flash signature so better to back it up first as you won't be able to regenerate it by yourself!
* edit the source code to enable Page 3 as a valid input in the `mem wipe` command.
* Updating keys dictionaries doesn't require to erase page 3.
## Page3 Layout
@ -64,7 +64,7 @@ Page3 is used as follows by the Proxmark3 RDV4 firmware:
* length: 1 sector (actually only a few bytes are used to store `t55xx_config` structure)
* **RSA SIGNATURE**, see below for details
* offset: page 3 sector 15 (0xF) offset 0xF7F @ 3*0x10000+15*0x1000+0xF7F=0x3FF7F
* offset: page 3 sector 15 (0xF) offset 0xF7F @ 3*0x10000+15*0x1000+0xF7F=0x3FF7F (decimal 262015)
* length: 128 bytes
* offset should have been 0x3FF80 but historically it's one byte off and therefore the last byte of the flash is unused
@ -91,5 +91,6 @@ You can verify it with: `mem info`
[+] RSA Verification ok
```
For a backup of the signature: `mem dump p f flash_signature_dump o 262015 l 128`
To make a backup of the signature to file:
`mem dump p f flash_signature_dump o 262015 l 128`