From 5f84c80fc580bdd64b0f2f67a92a840965148e40 Mon Sep 17 00:00:00 2001
From: nahi <nahi@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 4 Sep 2003 10:31:29 +0000
Subject: * sample/openssl: added.  Sample of standard distribution library
 should be   locate in sample/{module_name}/*.

* ext/openssl/sample/*: removed.  move to sample/openssl/*.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4492 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 sample/openssl/certstore.rb | 161 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 sample/openssl/certstore.rb

(limited to 'sample/openssl/certstore.rb')

diff --git a/sample/openssl/certstore.rb b/sample/openssl/certstore.rb
new file mode 100644
index 0000000000..bbc637f668
--- /dev/null
+++ b/sample/openssl/certstore.rb
@@ -0,0 +1,161 @@
+require 'c_rehash'
+require 'crlstore'
+
+
+class CertStore
+  include OpenSSL
+  include X509
+
+  attr_reader :self_signed_ca
+  attr_reader :other_ca
+  attr_reader :ee
+  attr_reader :crl
+  attr_reader :request
+
+  def initialize(certs_dir)
+    @certs_dir = certs_dir
+    @c_store = CHashDir.new(@certs_dir)
+    @c_store.hash_dir(true)
+    @crl_store = CrlStore.new(@c_store)
+    @x509store = Store.new
+    @self_signed_ca = @other_ca = @ee = @crl = nil
+
+    # Uncomment this line to let OpenSSL to check CRL for each certs.
+    # @x509store.flags = V_FLAG_CRL_CHECK | V_FLAG_CRL_CHECK_ALL
+
+    add_path
+    scan_certs
+  end
+
+  def generate_cert(filename)
+    @c_store.load_pem_file(filename)
+  end
+
+  def verify(cert)
+    error, crl_map = do_verify(cert)
+    if error
+      [[false, cert, crl_map[cert.subject], error]]
+    else
+      @x509store.chain.collect { |c| [true, c, crl_map[c.subject], nil] }
+    end
+  end
+
+  def match_cert(cert1, cert2)
+    (cert1.issuer.cmp(cert2.issuer) == 0) and cert1.serial == cert2.serial
+  end
+
+  def is_ca?(cert)
+    case guess_cert_type(cert)
+    when CERT_TYPE_SELF_SIGNED
+      true
+    when CERT_TYPE_OTHER 
+      true
+    else
+      false
+    end
+  end
+
+  def scan_certs
+    @self_signed_ca = []
+    @other_ca = []
+    @ee = []
+    @crl = []
+    @request = []
+    load_certs
+  end
+
+private
+
+  def add_path
+    @x509store.add_path(@certs_dir)
+  end
+
+  def do_verify(cert)
+    error_map = {}
+    crl_map = {}
+    result = @x509store.verify(cert) do |ok, ctx|
+      cert = ctx.current_cert
+      if ctx.current_crl
+	crl_map[cert.subject] = true
+      end
+      if ok
+	if !ctx.current_crl
+	  if crl = @crl_store.find_crl(cert)
+	    crl_map[cert.subject] = true
+	    if crl.revoked.find { |revoked| revoked.serial == cert.serial }
+	      ok = false
+	      error_string = 'certification revoked'
+	    end
+	  end
+	end
+      end
+      error_map[cert.subject] = error_string if error_string
+      ok
+    end
+    error = if result
+	nil
+      else
+	error_map[cert.subject] || @x509store.error_string
+      end
+    return error, crl_map
+  end
+
+  def load_certs
+    @c_store.get_certs.each do |certfile|
+      cert = generate_cert(certfile)
+      case guess_cert_type(cert)
+      when CERT_TYPE_SELF_SIGNED
+	@self_signed_ca << cert
+      when CERT_TYPE_OTHER
+	@other_ca << cert
+      when CERT_TYPE_EE
+	@ee << cert
+      else
+	raise "Unknown cert type."
+      end
+    end
+    @c_store.get_crls.each do |crlfile|
+      @crl << generate_cert(crlfile)
+    end
+  end
+
+  CERT_TYPE_SELF_SIGNED = 0
+  CERT_TYPE_OTHER = 1
+  CERT_TYPE_EE = 2
+  def guess_cert_type(cert)
+    ca = self_signed = is_cert_self_signed(cert)
+    cert.extensions.each do |ext|
+      # Ignores criticality of extensions.  It's 'guess'ing.
+      case ext.oid
+      when 'basicConstraints'
+	/CA:(TRUE|FALSE), pathlen:(\d+)/ =~ ext.value
+	ca = ($1 == 'TRUE') unless ca
+      when 'keyUsage'
+	usage = ext.value.split(/\s*,\s*/)
+	ca = usage.include?('Certificate Sign') unless ca
+      when 'nsCertType'
+	usage = ext.value.split(/\s*,\s*/)
+	ca = usage.include?('SSL CA') unless ca
+      end
+    end
+    if ca
+      if self_signed
+	CERT_TYPE_SELF_SIGNED
+      else
+	CERT_TYPE_OTHER
+      end
+    else
+      CERT_TYPE_EE
+    end
+  end
+
+  def is_cert_self_signed(cert)
+    # cert.subject.cmp(cert.issuer) == 0
+    cert.subject.to_s == cert.issuer.to_s
+  end
+end
+
+
+if $0 == __FILE__
+  c = CertStore.new("trust_certs")
+end
-- 
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