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Wiki / Protocol Messages

AuthenticationCleartextPassword

AuthenticationCleartextPassword 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
3
Documented flow contexts
Start-up
direction
B
manual path
/docs/18/protocol-message-formats.html
signature
AuthenticationCleartextPassword (B)

Definition PG 18

Byte1('R')

Identifies the message as an authentication request.

Int32(8)

Length of message contents in bytes, including self.

Int32(3)

Specifies that a clear-text password is required.

Wire fields in documented order

PositionFormatMeaning
1Byte1('R')Identifies the message as an authentication request.
2Int32(8)Length of message contents in bytes, including self.
3Int32(3)Specifies that a clear-text password is required.

Compare versions

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(8)], map[description:Specifies that a clear-text password is required. format:Int32(3)]

Source references

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f

Text language: en · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f