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Commit0886dde

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Fix SSPI login when multiple roundtrips are required
This fixes SSPI login failures showing "The functionrequested is not supported", often showing up when connectingto localhost. The reason was not properly updating the SSPIhandle when multiple roundtrips were required to complete theauthentication sequence.Report and analysis by Ahmed Shinwari, patch by Magnus Hagander
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‎src/backend/libpq/auth.c

Lines changed: 8 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1349,16 +1349,22 @@ pg_SSPI_recvauth(Port *port)
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_("could not accept SSPI security context"),r);
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}
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1352+
/*
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* Overwrite the current context with the one we just received.
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* If sspictx is NULL it was the first loop and we need to allocate
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* a buffer for it. On subsequent runs, we can just overwrite the
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* buffer contents since the size does not change.
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*/
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if (sspictx==NULL)
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{
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sspictx=malloc(sizeof(CtxtHandle));
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if (sspictx==NULL)
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ereport(ERROR,
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(errmsg("out of memory")));
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1359-
memcpy(sspictx,&newctx,sizeof(CtxtHandle));
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}
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1366+
memcpy(sspictx,&newctx,sizeof(CtxtHandle));
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if (r==SEC_I_CONTINUE_NEEDED)
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elog(DEBUG4,"SSPI continue needed");
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