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-rw-r--r--lib/srp/session.rb16
-rw-r--r--test/session_test.rb28
2 files changed, 37 insertions, 7 deletions
diff --git a/lib/srp/session.rb b/lib/srp/session.rb
index a1153e0..db8d428 100644
--- a/lib/srp/session.rb
+++ b/lib/srp/session.rb
@@ -27,15 +27,16 @@ module SRP
def authenticate(m)
if(m == calculate_m(server_secret))
- return calculate_m2(m, server_secret)
+ return calculate_m2
end
end
protected
- def initialize_server(aa)
+ # only seed b for testing purposes.
+ def initialize_server(aa, b = nil)
@aa = aa
- @b = bigrand(32).hex
+ @b = b || bigrand(32).hex
# B = g^b + k v (mod N)
@bb = (modpow(GENERATOR, @b) + multiplier * @user.verifier) % BIG_PRIME_N
@u = calculate_u
@@ -66,13 +67,14 @@ module SRP
# this is outdated - SRP 6a uses
# M = H(H(N) xor H(g), H(I), s, A, B, K)
def calculate_m(secret)
- n_xor_g_hash = sha256_str(hn_xor_hg).hex
+ @k = sha256_int(secret).hex
+ n_xor_g_long = hn_xor_hg.bytes.map{|b| "%02x" % b.ord}.join.hex
username_hash = sha256_str(@user.username).hex
- sha256_int(n_xor_g_hash, username_hash, @user.salt, @aa, @bb, secret).hex
+ @m = sha256_int(n_xor_g_long, username_hash, @user.salt, @aa, @bb, @k).hex
end
- def calculate_m2(m, secret)
- sha256_int(@aa, m, secret).hex
+ def calculate_m2
+ sha256_int(@aa, @m, @k).hex
end
def calculate_u
diff --git a/test/session_test.rb b/test/session_test.rb
new file mode 100644
index 0000000..f41b34b
--- /dev/null
+++ b/test/session_test.rb
@@ -0,0 +1,28 @@
+require File.expand_path(File.dirname(__FILE__) + '/test_helper')
+
+class SessionTest < Test::Unit::TestCase
+
+ attr_accessor :salt, :verifier, :username
+
+ def setup
+ @username = "testuser"
+ @password = "password"
+ @salt = '4c78c3f8'.hex
+ @client = SRP::Client.new(@username, @password, @salt)
+ @verifier = @client.verifier
+ end
+
+ def test_equivalance_to_py_srp
+ aa = '9ff9d176b37d9100ad4d788b94ef887df6c88786f5fa2419c9a964001e1c1fa5cd22ea39dcf27682dac6cd8861d9de88184653451fd47f5654845ed24e828d531f95c44377c9bc3f5dd83a669716257c7b975a3a032d4d8adb605553cf4d45c483d7aceb7e6a23c5bd4b0aeeb2ef138b7fc75b27d9d706851c3ab9c721710272'.hex
+ b = 'ce414b3b52d13a1f67416b7e00cdefb07c874291aed395efeab9435ec1ad6ac3'.hex
+ bb = 'b2e852fe7af02d7931186f4958844b829d2976dd58c7bc7928ba3102ff269a9029c707112ab0b7cafdaf86a760f7b50ddd9c847e0c97f564d53cfd52daf61982f06582d49bbb3ea4ad6be55d513028eaf400a6d5a9d26b47689d3438a552716d65680d1b6ee77df3c9b3b6ba61023985562f2be4a6f1723282a2013160594565'.hex
+ m = 'a0c066844117ffe7a7999f84356f3a7c8dce38e4e936eca2b6979ab0fce6ff6d'.hex
+ m2 = '1f4a5ba9c5280b5b752465670f351bb1e61ff9ca06e02ad43c4418affeb3a1ef'.hex
+ session = SRP::Session.new(self, aa)
+ session.send(:initialize_server, aa, b) # seeding b to compare to py_srp
+ assert_equal bb.to_s(16), session.bb.to_s(16)
+ assert_equal m2, session.authenticate(m)
+ end
+
+
+end