Add proper certificates for S3

Commit @71bc866 did not add the correct certificates as show by the test
from #673.  Now we have a tool to determine the correct certificates by
automatically from a certs.pem.

This updates #665 and #671.

Author: drbrain

lib/rubygems/ssl_certs/Class3PublicPrimaryCertificationAuthority.pem

@@ -0,0 +1,14 @@
+-----BEGIN CERTIFICATE-----
+MIICPDCCAaUCEHC65B0Q2Sk0tjjKewPMur8wDQYJKoZIhvcNAQECBQAwXzELMAkG
+A1UEBhMCVVMxFzAVBgNVBAoTDlZlcmlTaWduLCBJbmMuMTcwNQYDVQQLEy5DbGFz
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+AA9WjQKZ7aKQRUzkuxCkPfAyAw7xzvjoyVGM5mKf5p/AfbdynMk2OmufTqj/ZA1k
+-----END CERTIFICATE-----

lib/rubygems/ssl_certs/EntrustnetSecureServerCertificationAuthority.pem

@@ -0,0 +1,28 @@
+-----BEGIN CERTIFICATE-----
+MIIE2DCCBEGgAwIBAgIEN0rSQzANBgkqhkiG9w0BAQUFADCBwzELMAkGA1UEBhMC
+VVMxFDASBgNVBAoTC0VudHJ1c3QubmV0MTswOQYDVQQLEzJ3d3cuZW50cnVzdC5u
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+2cNgQ4xYDiKWL2KjLB+6rQXvqzJ4h6BUcxm1XAX5Uj5tLUUL9wqT6u0G+bI=
+-----END CERTIFICATE-----

lib/rubygems/ssl_certs/GeoTrustGlobalCA.pem

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDVDCCAjygAwIBAgIDAjRWMA0GCSqGSIb3DQEBBQUAMEIxCzAJBgNVBAYTAlVT
+MRYwFAYDVQQKEw1HZW9UcnVzdCBJbmMuMRswGQYDVQQDExJHZW9UcnVzdCBHbG9i
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+5fEWCRE11azbJHFwLJhWC9kXtNHjUStedejV0NxPNO3CBWaAocvmMw==
+-----END CERTIFICATE-----

lib/rubygems/ssl_certs/VerisignClass3PublicPrimaryCertificationAuthority-G5.pem

@@ -8,10 +8,18 @@
 #
 class TestBundledCA < Gem::TestCase
 
+  THIS_FILE = File.expand_path __FILE__
+
   def bundled_certificate_store
     store = OpenSSL::X509::Store.new
-    req = Gem::Request.new(nil,nil,nil,:no_proxy)
-    req.add_rubygems_trusted_certs(store)
+
+    ssl_cert_glob =
+      File.expand_path '../../../lib/rubygems/ssl_certs/*.pem', THIS_FILE
+
+    Dir[ssl_cert_glob].each do |ssl_cert|
+      store.add_file ssl_cert
+    end
+
     store
   end
 

lib/rubygems/ssl_certs/VerisignClass3SecureServerCA-G3.pem

@@ -0,0 +1,103 @@
+require 'net/http'
+require 'openssl'
+
+URIS = [
+  URI('https://rubygems.org'),
+  URI('https://s3.amazonaws.com'),
+  URI('https://d2chzxaqi4y7f8.cloudfront.net'),
+  URI('https://rubygems.global.ssl.fastly.net'),
+]
+
+def connect_to uri, store
+  http = Net::HTTP.new uri.hostname, uri.port
+
+  http.use_ssl = uri.scheme.downcase == 'https'
+  http.verify_mode = OpenSSL::SSL::VERIFY_PEER
+  http.cert_store = store
+
+  http.get '/'
+
+  true
+rescue OpenSSL::SSL::SSLError
+  false
+end
+
+def load_certificates io
+  cert_texts =
+    io.read.scan(/^-{5}BEGIN CERTIFICATE-{5}.*?^-{5}END CERTIFICATE-{5}/m)
+
+  cert_texts.map do |cert_text|
+    OpenSSL::X509::Certificate.new cert_text
+  end
+end
+
+def show_certificates certificates
+  certificates.each do |certificate|
+    p certificate.subject.to_a
+  end
+end
+
+def store_for certificates
+  store = OpenSSL::X509::Store.new
+  certificates.each do |certificate|
+    store.add_cert certificate
+  end
+
+  store
+end
+
+def test_certificates certificates, uri
+  1.upto certificates.length do |n|
+    puts "combinations of #{n} certificates"
+    certificates.combination(n).each do |combination|
+      match = test_uri uri, combination
+
+      if match then
+        $needed_combinations << match
+        puts
+        return
+      else
+        print '.'
+      end
+    end
+    puts
+  end
+end
+
+def test_uri uri, certificates
+  store = store_for certificates
+
+  verified = connect_to uri, store
+
+  return certificates if verified
+
+  nil
+end
+
+def write_certificates certificates
+  certificates.each do |certificate|
+    subject = certificate.subject.to_a
+    name = (subject.assoc('CN') || subject.assoc('OU'))[1]
+    name = name.delete ' .-'
+
+    open "lib/rubygems/ssl_certs/#{name}.pem", 'w' do |io|
+      io.write certificate.to_pem
+    end
+  end
+end
+
+certificates = load_certificates ARGF
+puts "loaded #{certificates.length} certificates"
+
+$needed_combinations = []
+
+URIS.each do |uri|
+  puts uri
+
+  test_certificates certificates, uri
+end
+
+needed = $needed_combinations.flatten.uniq
+
+write_certificates needed
+