ref: c07ad86666257eb54db8723b330d289b13036d44
dir: /man/8/signer/
.TH SIGNER 8 .SH NAME signer, verify, countersigner \- set-top box authentication .SH SYNOPSIS .B auth/signer .PP .BI auth/verify " set-top-box-id" .PP .B auth/countersigner .SH DESCRIPTION .I Signer and .I countersigner listen for requests on the service ports .B infsigner and .BR infcsigner , respectively. They are typically run via .IR svc (8) on a machine acting as authentication server for a network. .I Verify is invoked on the same server, after .I signer but before .IR countersigner , following an independent check of a caller's credentials. .PP .I Signer constructs an authentication certificate from the signer's key (in .BR /keydb/signerkey ) and information from the requesting client, including the set top box ID. The signer's key can be created using .IR createsignerkey (8), but if the key does not yet exist, .I signer creates and initialises .B /keydb/signerkey itself, with an owner name of .LR * . .PP .I Signer `blinds' the certificate by XOR-ing it with a random bit mask, then sends the result to the requesting client. The client machine's user uses that information to establish identity with a human agent on the signing machine. .I Signer also saves the both the `blinded' and `unblinded' result from the input in .BI /keydb/signed/ set-top-box-id for .I verify (see below). .PP .I Verify is run on the signing server by the agency running the authentication server, in response to a call from a remote user who has invoked .IR register (8) or an equivalent. .I Verify checks a caller's identity using information from the file .BI /keydb/signed/ set-top-box-id created by .IR signer . The file contains the previously crafted authentication certificate and the `blinded' version of the certificate that was sent to the requesting client. .PP .I Verify displays the `blinded' version textually or graphically, as appropriate, so that it can be compared to that reported by the set-top-box owner over a secure independent mechanism (for example, telephone). If the operator of .I verify is convinced of the identity of the caller, the operator should accept when prompted by .IR verify . .I Verify then writes the authentication certificate to .BI /keydb/countersigned/ set-top-box-id, as input for .I countersigner (see .IR signer (8)). .PP .I Note: if the operator of .I verify accepts the identity, the set-top-box owner should be requested to answer `yes' to the prompt displayed by .IR register (8). The order of acceptance\-first on the signer, then on the client\-is essential, to produce the countersigned certificate before invoking .I countersigner to read it. .PP .I Countersigner sends the blinding data in .BI /keydb/countersigned/ set-top-box-id to the requesting client. .SH FILES .TF /keydb/countersigned/set-top-box-id .TP .B /keydb/signerkey Secret key of the `signer' host. .TP .BI /keydb/signed/ set-top-box-id Repository of `blinded' and clear certificates. .TP .BI /keydb/countersigned/ set-top-box-id Repository of `unblinded' certificates. .SH SOURCE .B /appl/cmd/auth/signer.b .br .B /appl/cmd/auth/verify.b .br .B /appl/cmd/auth/countersigner.b .SH SEE ALSO .IR createsignerkey (8), .IR register (8), .IR svc (8)