AuthenticationSASL
AuthenticationSASL is a backend protocol message. Identifies the message as an authentication request.
Reading PG 18·Select a recorded version
- Direction
- Backend → frontend
- First wire field
- Byte1('R')
- Field entries
- 4
- Documented flow contexts
- Start-up
- direction
- B
- manual path
- /docs/18/protocol-message-formats.html
- signature
- AuthenticationSASL (B)
Definition PG 18
-
- Byte1('R')
-
Identifies the message as an authentication request.
- Int32
-
Length of message contents in bytes, including self.
- Int32(10)
-
Specifies that SASL authentication is required.
The message body is a list of SASL authentication mechanisms, in the server's order of preference. A zero byte is required as terminator after the last authentication mechanism name. For each mechanism, there is the following:
- String
-
Name of a SASL authentication mechanism.
Wire fields in documented order
| Position | Format | Meaning |
|---|---|---|
| 1 | Byte1('R') | Identifies the message as an authentication request. |
| 2 | Int32 | Length of message contents in bytes, including self. |
| 3 | Int32(10) | Specifies that SASL authentication is required. |
| 4 | String | Name of a SASL authentication mechanism. |
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Complete source facts
fields
map[description:Identifies the message as an authentication request. format:Byte1('R')], map[description:Length of message contents in bytes, including self. format:Int32], map[description:Specifies that SASL authentication is required. format:Int32(10)], map[description:Name of a SASL authentication mechanism. format:String]Source references
Full definition and evidence JSON
Definition sources
center · PostgreSQL 18 · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f
Text language: en · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f