{"Entry":{"collection":"protocol","key":"authenticationsspi-b","name":"AuthenticationSSPI","aliases":["AuthenticationSSPI","Byte1('R')"],"metadata":{"aliases":["AuthenticationSSPI","Byte1('R')"],"category":"Backend messages","content_hash":"78086dc9a6ed76eac8b5264548d7822b703184f1734c44aa3fd2a75ea86be426","derived_content_hash":"a4b275b500f56618b51b340b79c660d28f2d2e814446b0e4199b69bb0079b541","imported_at":"2026-09-30T00:40:44.429805+08:00","name":"AuthenticationSSPI","name_zh":"","slug":"authenticationsspi-b","summary":"AuthenticationSSPI is a backend protocol message. Identifies the message as an authentication request."}},"Definition":{"Collection":"protocol","Key":"authenticationsspi-b","SourceDatabase":"center","Version":"18","SourceTable":"protocol_message","SourceKey":"authenticationsspi-b","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"comparison_data":{"direction":"B","fields":[{"description":"Identifies the message as an authentication request.","format":"Byte1('R')"},{"description":"Length of message contents in bytes, including self.","format":"Int32(8)"},{"description":"Specifies that SSPI authentication is required.","format":"Int32(9)"}]},"comparison_hash":"1b85cb03a6f99f49a2feb26d6d252104baa70ecd5da4006ecd470e61bb5b8bad","description":["AuthenticationSSPI is a backend protocol message. Identifies the message as an authentication request."],"description_zh":"Byte1('R') 将该消息标识为认证请求。 Int32(8) 消息内容的长度（以字节为单位），包括其自身。 Int32(9) 表示需要 SSPI 认证。","description_zh_html":"\u003cp\u003e协议消息 AuthenticationSSPI (B)。\u003c/p\u003e\u003ch3\u003e同版本中文手册定义\u003c/h3\u003e\u003cdd\u003e\u003cdiv class=\"variablelist\"\u003e\u003cdl class=\"variablelist\"\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003eByte1('R')\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\u003cp\u003e\n         将该消息标识为认证请求。\n        \u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003eInt32(8)\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\u003cp\u003e\n         消息内容的长度（以字节为单位），包括其自身。\n        \u003c/p\u003e\u003c/dd\u003e\u003cdt\u003e\u003cspan class=\"term\"\u003eInt32(9)\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\u003cp\u003e\n         表示需要 SSPI 认证。\n        \u003c/p\u003e\u003c/dd\u003e\u003c/dl\u003e\u003c/div\u003e\u003c/dd\u003e\u003cp\u003e\u003ca href=\"/zh/docs/18/protocol-message-formats.html#PROTOCOL-MESSAGE-FORMATS-AUTHENTICATIONSSPI\"\u003e查看完整中文手册与上下文\u003c/a\u003e。\u003c/p\u003e","direction":"B","facts":[{"label":"Direction","value":"Backend → frontend"},{"label":"First wire field","value":"Byte1('R')"},{"label":"Field entries","value":"3"},{"label":"Documented flow contexts","value":"Start-up"}],"facts_zh":[{"label":"方向","value":"后端 → 前端"},{"label":"首个线上协议字段","value":"Byte1('R')"},{"label":"字段条目","value":"3"},{"label":"手册中的交互阶段","value":"启动"}],"fields":[{"description":"Identifies the message as an authentication request.","format":"Byte1('R')"},{"description":"Length of message contents in bytes, including self.","format":"Int32(8)"},{"description":"Specifies that SSPI authentication is required.","format":"Int32(9)"}],"manual_html":"\u003cdl\u003e\u003cdd\u003e\n\u003cdiv class=\"variablelist\"\u003e\n\u003cdl class=\"variablelist\"\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eByte1('R')\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eIdentifies the message as an authentication request.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eInt32(8)\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eLength of message contents in bytes, including self.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eInt32(9)\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eSpecifies that SSPI authentication is required.\u003c/p\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003c/dd\u003e\u003c/dl\u003e","manual_path":"/docs/18/protocol-message-formats.html","related":[{"label":"Protocol flow and exchange examples","url":"/docs/18/protocol-flow.html"},{"label":"Protocol overview","url":"/docs/18/protocol-overview.html"},{"label":"Start-up","url":"/docs/18/protocol-flow.html#PROTOCOL-FLOW-START-UP"}],"release":{"channel":"stable","label":"18.6","major":"18","ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sections":[{"paragraphs":["The complete definition below retains repetition, counts and conditional fields. A numbered table row is a documented field definition, not a fixed byte offset. Integer encodings and flow rules follow the same-version protocol chapter."],"title":"Framing and repetition"}],"sections_zh":[{"paragraphs":["下方完整定义保留重复项、计数与条件字段。表格行号表示文档中的字段定义，并非固定字节偏移量。整数编码与交互流程以同版本协议章节为准。"],"title":"消息边界与重复字段"}],"signature":"AuthenticationSSPI (B)","sources":[{"label":"PostgreSQL 18 English manual","path":"protocol-message-formats.html","sha256":"53f37652ac2c089e30ada87d8aee7bdd0f26695b03f275302e526a807d2a1f23","url":"/docs/18/protocol-message-formats.html#PROTOCOL-MESSAGE-FORMATS-AUTHENTICATIONSSPI"}],"tables":[{"columns":[{"key":"c0","label":"Position"},{"key":"c1","label":"Format"},{"key":"c2","label":"Meaning"}],"key":"fields","rows":[{"c0":"1","c1":"Byte1('R')","c2":"Identifies the message as an authentication request."},{"c0":"2","c1":"Int32(8)","c2":"Length of message contents in bytes, including self."},{"c0":"3","c1":"Int32(9)","c2":"Specifies that SSPI authentication is required."}],"title":"Wire fields in documented order"}],"tables_zh":[{"columns":[{"key":"c0","label":"位置"},{"key":"c1","label":"格式"},{"key":"c2","label":"含义"}],"key":"fields","rows":[{"c0":"1","c1":"Byte1('R')","c2":"将该消息标识为认证请求。"},{"c0":"2","c1":"Int32(8)","c2":"消息内容的长度（以字节为单位），包括其自身。"},{"c0":"3","c1":"Int32(9)","c2":"表示需要 SSPI 认证。"}],"title":"按手册顺序排列的线上协议字段"}],"zh_from":{"authored_translation":"source-derived-identity","body_sha256":"6dceb8c82255637b72e070ed6ee69b55c4400f5569c07878aeb6cee98c7ebdb4","kind":"same-version-chinese-manual-with-source-derived-identity","manual":{"anchor":"PROTOCOL-MESSAGE-FORMATS-AUTHENTICATIONSSPI","build_id":107,"extraction":"exact-definition","fragment_sha256":"f3aa729761c960eb6b924033a7c488109b055f06d902762d26563de927195e9c","locale":"zh-Hans","page_key":"protocol-message-formats.html","source_hash":"0be0a37b38d80c96c157ca9fcfe9222995654664aad8136f7ac2b1b552f6753a","source_revision":"unknown:rendered-translation-baseline","translated_from_revision":null,"translation_revision":"git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:08e987a66af27b98444a8057c256314eafa13611a3fb9e888214fc436824244b","url":"/zh/docs/18/protocol-message-formats.html#PROTOCOL-MESSAGE-FORMATS-AUTHENTICATIONSSPI","version":"18"},"runtime_rerun":false,"source_facts_revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}},"ManualEvidence":{"manual_path":"/docs/18/protocol-message-formats.html","release":{"channel":"stable","label":"18.6","major":"18","ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sources":[{"label":"PostgreSQL 18 English manual","path":"protocol-message-formats.html","sha256":"53f37652ac2c089e30ada87d8aee7bdd0f26695b03f275302e526a807d2a1f23","url":"/docs/18/protocol-message-formats.html#PROTOCOL-MESSAGE-FORMATS-AUTHENTICATIONSSPI"}]},"MeasuredEvidence":{}},"Text":{"Collection":"protocol","Key":"authenticationsspi-b","SourceDatabase":"center","Version":"18","Locale":"en","Title":"AuthenticationSSPI","Summary":"AuthenticationSSPI is a backend protocol message. Identifies the message as an authentication request.","BodyHTML":"\u003cdl\u003e\u003cdd\u003e\n\u003cdiv\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cspan\u003eByte1(\u0026#39;R\u0026#39;)\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eIdentifies the message as an authentication request.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003eInt32(8)\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eLength of message contents in bytes, including self.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003eInt32(9)\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eSpecifies that SSPI authentication is required.\u003c/p\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003c/dd\u003e\u003c/dl\u003e","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","ContentHash":"757f4d69f8a06441f63491b4358baf43495068b9d99a1a0b55dae50771ee8a4d","Payload":{"description":["AuthenticationSSPI is a backend protocol message. Identifies the message as an authentication request."],"manual_html":"\u003cdl\u003e\u003cdd\u003e\n\u003cdiv class=\"variablelist\"\u003e\n\u003cdl class=\"variablelist\"\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eByte1('R')\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eIdentifies the message as an authentication request.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eInt32(8)\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eLength of message contents in bytes, including self.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003eInt32(9)\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eSpecifies that SSPI authentication is required.\u003c/p\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003c/dd\u003e\u003c/dl\u003e","related":[{"label":"Protocol flow and exchange examples","url":"/docs/18/protocol-flow.html"},{"label":"Protocol overview","url":"/docs/18/protocol-overview.html"},{"label":"Start-up","url":"/docs/18/protocol-flow.html#PROTOCOL-FLOW-START-UP"}],"sections":[{"paragraphs":["The complete definition below retains repetition, counts and conditional fields. A numbered table row is a documented field definition, not a fixed byte offset. Integer encodings and flow rules follow the same-version protocol chapter."],"title":"Framing and repetition"}],"tables":[{"columns":[{"key":"c0","label":"Position"},{"key":"c1","label":"Format"},{"key":"c2","label":"Meaning"}],"key":"fields","rows":[{"c0":"1","c1":"Byte1('R')","c2":"Identifies the message as an authentication request."},{"c0":"2","c1":"Int32(8)","c2":"Length of message contents in bytes, including self."},{"c0":"3","c1":"Int32(9)","c2":"Specifies that SSPI authentication is required."}],"title":"Wire fields in documented order"}]}},"RequestedLocale":"en","Fallback":false,"Versions":["10","11","12","13","14","15","16","17","18","19","20"],"Locales":["en","zh-Hans"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}