IRK Calculator
==============
author: optedoblivion@google.com
This tool is used to verify an IRK + RPA pair and generate an RPA from an IRK.
```
irk-calculator 0.1.0
USAGE:
irk-calculator --command <COMMAND> --irk <IRK> --address <ADDRESS>
OPTIONS:
-a, --address <ADDRESS>
-c, --command <COMMAND>
-h, --help Print help information
-i, --irk <IRK>
-V, --version Print version information
```
```
Legend:
IRK = Identity Resolving Key (see BT Spec for more)
RPA = Resolvable Private Address (see BT spec for more)
```
Example Data:
```
IRK: 0102030405060708090a0b0c0d0e0f10
RPA: 79:CB:92:70:BE:B3
IRK: 0102030405060708090a0b0c0d0e0f10
RPA: 58:9B:3E:A3:5B:24
```
Example Usage:
```
$ cargo build && RUST_BACKTRACE=1 ./target/debug/irk-calculator -c verify -a "79:CB:92:70:BE:B3" -i "0102030405060708090a0b0c0d0e0f10"
Verifying 0102030405060708090a0b0c0d0e0f10 and 79:CB:92:70:BE:B3
IRK Byte Array: [01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0B, 0C, 0D, 0E, 0F, 10]
Address Byte Array: [79, CB, 92, 70, BE, B3]
prand: [79, CB, 92]
Given Hash: [70, BE, B3]
irk slice: [01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0B, 0C, 0D, 0E, 0F, 10]
=====[ ah ]=====
K: [01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0B, 0C, 0D, 0E, 0F, 10]
R: [79, CB, 92]
R': [00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 79, CB, 92]
=====[ e ]=====
key_reversed: [10, 0F, 0E, 0D, 0C, 0B, 0A, 09, 08, 07, 06, 05, 04, 03, 02, 01]
block: [00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 79, CB, 92]
e-block: [05, 5A, 53, 46, BB, 26, 28, 67, AC, 24, 73, 66, 41, 70, BE, B3]
=====[ /e ]=====
ED: [05, 5A, 53, 46, BB, 26, 28, 67, AC, 24, 73, 66, 41, 70, BE, B3]
ret: [70, BE, B3]
=====[ /ah ]=====
given hash: [70, BE, B3]
calcd hash: [70, BE, B3]
IRK + Address combination is valid: true
$ cargo build && RUST_BACKTRACE=1 ./target/debug/irk-calculator -c verify -a "58:9B:3E:A3:5B:24" -i "0102030405060708090a0b0c0d0e0f10"
Verifying 0102030405060708090a0b0c0d0e0f10 and 58:9B:3E:A3:5B:24
IRK Byte Array: [01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0B, 0C, 0D, 0E, 0F, 10]
Address Byte Array: [58, 9B, 3E, A3, 5B, 24]
prand: [58, 9B, 3E]
Given Hash: [A3, 5B, 24]
irk slice: [01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0B, 0C, 0D, 0E, 0F, 10]
=====[ ah ]=====
K: [01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0B, 0C, 0D, 0E, 0F, 10]
R: [58, 9B, 3E]
R': [00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 58, 9B, 3E]
=====[ e ]=====
key_reversed: [10, 0F, 0E, 0D, 0C, 0B, 0A, 09, 08, 07, 06, 05, 04, 03, 02, 01]
block: [00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 58, 9B, 3E]
e-block: [A9, EC, 77, CE, BB, BC, 24, A7, 45, 1E, 5E, 23, F7, A3, 5B, 24]
=====[ /e ]=====
ED: [A9, EC, 77, CE, BB, BC, 24, A7, 45, 1E, 5E, 23, F7, A3, 5B, 24]
ret: [A3, 5B, 24]
=====[ /ah ]=====
given hash: [A3, 5B, 24]
calcd hash: [A3, 5B, 24]
IRK + Address combination is valid: true
```
