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authorsiddharth <s@ricketyspace.net>2022-04-09 20:26:52 -0400
committersiddharth <s@ricketyspace.net>2022-04-09 20:26:52 -0400
commitafc801186f2591555eb43c0138ac1951da02cea4 (patch)
tree54bd9e50c1a7e7024935dd7b8dd1e1a122c810a9 /lib/srp.go
parent33423e8e822165045f0506101763ff527cce9d22 (diff)
lib: add NewSRPClientSession
Diffstat (limited to 'lib/srp.go')
-rw-r--r--lib/srp.go30
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/srp.go b/lib/srp.go
index 20208a6..491565c 100644
--- a/lib/srp.go
+++ b/lib/srp.go
@@ -78,6 +78,8 @@ type SRPClientSession struct {
// Multipier parameter. Client and server agree upon the value
// of N.
k *big.Int
+ // Hashing object for H() function.
+ h Sha256
// User's email address
ident string
// Scrambling parameter.
@@ -131,3 +133,31 @@ func NewSRPUser(n, g, k, ident, pass string) (*SRPUser, error) {
return user, nil
}
+
+func NewSRPClientSession(n, g, k, ident string) (*SRPClientSession, error) {
+ var ok bool
+
+ session := new(SRPClientSession)
+ session.n, ok = new(big.Int).SetString(StripSpaceChars(n), 16)
+ if !ok {
+ return nil, CPError{"n is invalid"}
+ }
+ session.g, ok = new(big.Int).SetString(StripSpaceChars(g), 16)
+ if !ok {
+ return nil, CPError{"g is invalid"}
+ }
+ session.k, ok = new(big.Int).SetString(StripSpaceChars(k), 16)
+ if !ok {
+ return nil, CPError{"k is invalid"}
+ }
+ session.ident = ident
+
+ // Initialize hashing object.
+ session.h = Sha256{}
+ session.h.Init([]uint32{})
+
+ // Generate secret ephemeral value.
+ session.a = big.NewInt(RandomInt(1, 10000000))
+
+ return session, nil
+}