/dev/hmac
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/dev/hmac is a device created by IOSP that can be accessed either by opening it with IOS_Open or by using FD 0x10002. It does not seem to exist in IOS28 and above as it got merged in /dev/sha
IOS_Ioctlv commands
| Command | In count | Io count | Notes |
|---|---|---|---|
| 0 | 3 | 2 | Possibly inner hash? Second vec must have length 4. |
| 1 | 3 | 2 | |
| 2 | 3 | 2 | Possibly outer hash? Most code is shared with request 0. |