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Be specific about encoding of QR codes

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Hugh Nimmo-Smith 2024-06-03 09:29:58 +01:00
parent a17550648c
commit ad81d0efa3
1 changed files with 10 additions and 4 deletions
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14
content/client-server-api/modules/end_to_end_encryption.md
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@ -1179,10 +1179,16 @@ The process between Alice and Bob verifying each other would be:
###### QR code format
The QR codes to be displayed and scanned using this format will encode binary
strings in the general form:
The QR codes to be displayed and scanned must be
[ISO/IEC 18004:2015](https://www.iso.org/standard/62021.html) compatible and
contain a single segment that uses the byte mode encoding.
- the ASCII string `MATRIX`
The error correction level can be chosen by the device displaying the QR code.
The binary segment must be of the following form:
- the string `MATRIX` encoded as one ASCII byte per character (i.e. `0x4D`,
`0x41`, `0x54`, `0x52`, `0x49`, `0x58`)
- one byte indicating the QR code version (must be `0x02`)
- one byte indicating the QR code verification mode. Should be one of the
following values:
@ -1210,7 +1216,7 @@ strings in the general form:
secret, and it is not a fixed size, clients will just use the remainder of
binary string as the shared secret.
For example, if Alice displays a QR code encoding the following binary string:
For example, if Alice displays a QR code encoding the following binary data:
```
"MATRIX" |ver|mode| len | event ID