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10 srp\-entry \- Generate a SRP\-SHA1 Server Entry
20 This utility generates an entry suitable for use in the
21 /etc/ppp/srp\-secrets file on a PPP EAP SRP\-SHA1 authenticator
22 ("server"). This file has the same basic layout as the other pppd(8)
23 authentication files, /etc/ppp/pap\-secrets and /etc/ppp/chap\-secrets.
24 Thus, the entry generated has at least four main fields separated by
25 spaces. The first field is the authenticatee ("client") name. The
26 second is the server name. The third is the secret. The fourth is
27 the allowed (or assigned) IP address for the client, and defaults to
28 "*". Additional fields can contain additional IP addresses or pppd
29 options; see pppd(8) for details.
31 The third field has three subfields, separated by colons. The first
32 subfield is the index of the modulus and generator from SRP's
33 /etc/tpasswd.conf. The special value 0 is used to represent the
34 well-known modulus and generator specified in the EAP SRP\-SHA1 draft.
35 The second subfield is the password validator. The third is the
36 password salt. These latter two values are encoded in base64 notation.
40 Specifies the modulus/generator index in /etc/tpasswd.conf. In order
41 to use this option, you will need to run the "tconf" utility from the
42 SRP package to generate local entries for this file. Note that if
43 these values are not known to the client, the client will be forced to
44 run time-consuming safety tests on the values used. For this reason,
45 using the well-known values is recommended.
48 Specifies the client name. The password validator is a hashed
49 combination of the client's name and password, and both are required.
50 If the client name is not supplied on the command line, srp\-entry will
51 prompt for the client name first.
54 .B /etc/ppp/srp\-secrets
55 Usernames, passwords and IP addresses for SRP authentication. This
56 file should be owned by root and not readable or writable by any other
57 user. Pppd will log a warning if this is not the case. Note that
58 srp\-entry does not write to this file. The user is responsible for
59 copying the output of srp\-entry into this file.
62 Indexed copies of tested modulus/generator combinations; part of the
69 Blunk, L., Vollbrecht, J.,
70 .I PPP Extensible Authentication Protocol (EAP).
73 .B draft\-ietf\-pppext\-eap\-srp\-03.txt
75 .I EAP SRP\-SHA1 Authentication Protocol.
80 .I The SRP Authentication and Key Exchange System
83 James Carlson (james.d.carlson@sun.com)