leading zeros of public exponent need to be dropped for digest

ebics.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name        = 'ebics'
-  s.version     = '0.0.5'
+  s.version     = '0.1.0'
   s.licenses    = ['MIT']
   s.summary     = "EBICS Ruby Client"
   s.description = "EBICS 2.5 H004 Implementation in Ruby."

keys/example.cer

@@ -0,0 +1,17 @@
+-----BEGIN CERTIFICATE-----
+MIIDQDCCAiigAwIBAgIBATANBgkqhkiG9w0BAQsFADBOMQswCQYDVQQGEwJGUjEOMAwGA1UEBxMF
+UGFyaXMxEzARBgNVBAoTCkUuQi5JLkMuUy4xCTAHBgNVBAsTADEPMA0GA1UEAxMGRS4gQml4MB4X
+DTA5MDcyNzA5MDYxNVoXDTE0MDcyNzA5MDYxNVowTjELMAkGA1UEBhMCRlIxDjAMBgNVBAcTBVBh
+cmlzMRMwEQYDVQQKEwpFLkIuSS5DLlMuMQkwBwYDVQQLEwAxDzANBgNVBAMTBkUuIEJpeDCCASIw
+DQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBANeOaO2fHl56a7bcS4FAnfTyvGiibmiyed9Jx1wi
+fCojuzzLpnSVWnbDm2wyB1/YXK1V/cllK+LCrav48xMnoga0aRcVxrSCtpAW+PB6Wn1hKkNW2m/w
+IuP1Vg+LB2EAsAVvCiMrCpyGKUUGNQ5x0Ph913xYUgZ41Rq/CNJ2w4AtuCgbr5KvRTwvKEv4JEJ5
+qymedq3Yy1kt6t5HbQkLzMpMOBtMLzUBiZUv1sTApEtK39CdCI8GAEsZdW5ePSdr77y0qsA7QCTx
+WliLpNDBx4BOuYJz9IdejqtNT4zAD7sQB6Yai54LzJ0lpHmA3baK3/Y3gBJqxC3WHSBf68x66icC
+AwEAAaMpMCcwCwYDVR0PBAQDAgZAMAoGA1UdDgQDBAExMAwGA1UdIwQFMAOAATEwDQYJKoZIhvcN
+AQELBQADggEBALo97IHqI3SfAS7rcTRGykCxqImtaDKJ3c77iKaUBIfJtBWuSxMLbLyC5xG5WQmS
+/IdjSLp8WWetDylP2mkKvqk601UJGYHTnvUHblVY9MhG5kD6LB6bfjp6PfOm1629Mlmg5BCZ7cO1
++pEbQK2IE1MTreCYPiQyJJeT6umUKfeRgS3WFWCya/zfaLlCZDrRy+N8TVFKauMMKa8AugUn9eAm
+7CuKgt89RkH3ERhJUZWb5Rbo6ykvHzbpDjaCedtnobUURjKeiwNR8cM5Tt8yeH4fOh63vbYZWUBv
+3jQ5URJX2vHgkOP6sNB/E7/yqYPLxhj3E7Ty2d4/ru3yjJfRiVE=
+-----END CERTIFICATE-----

lib/ebics.rb

@@ -90,7 +90,9 @@ def public_exponent
     end
 
     def public_sha_256
-      public_key_string = "#{ @rsa.public_key.e.to_s(16) } #{ @rsa.public_key.n.to_s(16) }"
+      public_key_string = "#{ @rsa.public_key.e.to_s(16).downcase } #{ @rsa.public_key.n.to_s(16).downcase }"
+      public_key_string.gsub! /\A0/, ''
+      puts public_key_string
       public_key_string.encode!('US-ASCII')
       Digest::SHA256.hexdigest(public_key_string)
     end

test/specification_test.rb

@@ -0,0 +1,21 @@
+require 'minitest/autorun'
+require_relative '../lib/ebics'
+
+class SchemaTest < Minitest::Test
+  def setup
+    @user = EBICS::User.new do |key|
+      key.rsa = OpenSSL::X509::Certificate.new File.read('keys/example.cer')
+    end
+
+    @example_key = @user.key('example')
+  end
+
+  def test_key_digest
+    assert_equal @example_key.public_exponent, 'AQAB'
+    assert_equal @example_key.public_sha_256.upcase, "F5ACB7B5CF88DCC80905AAE8783ED725F3AD1DCABB211DB77E58D679F9747739"
+  end
+
+  def test_public_modulus
+    assert_equal Base64.strict_decode64(@example_key.public_modulus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
+  end
+end