This utility generates an entry suitable for use in the
/etc/ppp/srp-secrets file on a PPP EAP SRP-SHA1 authenticator
("server"). This file has the same basic layout as the other
pppd(8) authentication files, /etc/ppp/pap-secrets and
/etc/ppp/chap-secrets. Thus, the entry generated has at least
four main fields separated by spaces. The first field is the
authenticatee ("client") name. The second is the server name.
The third is the secret. The fourth is the allowed (or assigned)
IP address for the client, and defaults to "*". Additional
fields can contain additional IP addresses or pppd options; see
pppd(8) for details.
The third field has three subfields, separated by colons. The
first subfield is the index of the modulus and generator from
SRP's /etc/tpasswd.conf. The special value 0 is used to
represent the well-known modulus and generator specified in the
EAP SRP-SHA1 draft. The second subfield is the password
validator. The third is the password salt. These latter two
values are encoded in base64 notation.
Specifies the modulus/generator index in
/etc/tpasswd.conf. In order to use this option, you will
need to run the "tconf" utility from the SRP package to
generate local entries for this file. Note that if these
values are not known to the client, the client will be
forced to run time-consuming safety tests on the values
used. For this reason, using the well-known values is
Specifies the client name. The password validator is a
hashed combination of the client's name and password, and
both are required. If the client name is not supplied on
the command line, srp-entry will prompt for the client
Usernames, passwords and IP addresses for SRP
authentication. This file should be owned by root and not
readable or writable by any other user. Pppd will log a
warning if this is not the case. Note that srp-entry does
not write to this file. The user is responsible for
copying the output of srp-entry into this file.
Indexed copies of tested modulus/generator combinations;
part of the SRP package.
Blunk, L., Vollbrecht, J., PPP Extensible AuthenticationProtocol (EAP). March 1998.
Carlson, J., et al., EAP SRP-SHA1 Authentication Protocol.
Wu, T., The SRP Authentication and Key Exchange System
This page is part of the ppp (An implementation of the Point-to-
Point Protocol (PPP)) project. Information about the project can
be found at ⟨https://ppp.samba.org/⟩. If you have a bug report
for this manual page, see
⟨https://github.com/paulusmack/ppp/issues⟩. This page was
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