SRP in JavaScript

Radix: 10 16 64
Protocol: SRP-3 (k=1) SRP-6 (k=3) SRP-6a (k=H(N || g))

1. Parameters

If the fields below are empty, re-initialize this page.

Modulus (N) =

Generator (g) =

Predefined values:

Multiplier (k) =

2. Password Database (server-side)

Setup the server's password verifier. Default password is password.

Username:

Password (server):

Salt (s) =

x = H(salt || H(username || ":" || password))

=

Verifier (v) = g^x (mod N)

=

3. Authentication Protocol

Authentication will succeed if the client password corresponds to the server's verifier entry (set above).

Client Server

a= b=

A= g^a (mod N) B= kv + g^b (mod N)

= =

Password (client): u=

x= v=

S= (B - kg^x) ^ (a + ux) (mod N) S= (Av^u) ^ b (mod N)

= =

Status:

Modulus (N) =
Generator (g) =
Predefined values:
Multiplier (k) =

Username:
Password (server):
Salt (s) =
x =	H(salt \|\| H(username \|\| ":" \|\| password))
=
Verifier (v) =	g^x (mod N)
=

	Client		Server
a=		b=
A=	g^a (mod N)	B=	kv + g^b (mod N)
=		=
Password (client):		u=
x=		v=
S=	(B - kg^x) ^ (a + ux) (mod N)	S=	(Av^u) ^ b (mod N)
=		=