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require 'rubygems/command'
require 'rubygems/security'
require 'openssl'
class Gem::Commands::CertCommand < Gem::Command
def initialize
super 'cert', 'Manage RubyGems certificates and signing settings',
:add => [], :remove => [], :list => [], :build => [], :sign => []
OptionParser.accept OpenSSL::X509::Certificate do |certificate|
begin
OpenSSL::X509::Certificate.new File.read certificate
rescue Errno::ENOENT
raise OptionParser::InvalidArgument, "#{certificate}: does not exist"
rescue OpenSSL::X509::CertificateError
raise OptionParser::InvalidArgument,
"#{certificate}: invalid X509 certificate"
end
end
OptionParser.accept OpenSSL::PKey::RSA do |key_file|
begin
key = OpenSSL::PKey::RSA.new File.read key_file
rescue Errno::ENOENT
raise OptionParser::InvalidArgument, "#{key_file}: does not exist"
rescue OpenSSL::PKey::RSAError
raise OptionParser::InvalidArgument, "#{key_file}: invalid RSA key"
end
raise OptionParser::InvalidArgument,
"#{key_file}: private key not found" unless key.private?
key
end
add_option('-a', '--add CERT', OpenSSL::X509::Certificate,
'Add a trusted certificate.') do |cert, options|
options[:add] << cert
end
add_option('-l', '--list [FILTER]',
'List trusted certificates where the',
'subject contains FILTER') do |filter, options|
filter ||= ''
options[:list] << filter
end
add_option('-r', '--remove FILTER',
'Remove trusted certificates where the',
'subject contains FILTER') do |filter, options|
options[:remove] << filter
end
add_option('-b', '--build EMAIL_ADDR',
'Build private key and self-signed',
'certificate for EMAIL_ADDR') do |email_address, options|
options[:build] << email_address
end
add_option('-C', '--certificate CERT', OpenSSL::X509::Certificate,
'Signing certificate for --sign') do |cert, options|
options[:issuer_cert] = cert
end
add_option('-K', '--private-key KEY', OpenSSL::PKey::RSA,
'Key for --sign or --build') do |key, options|
options[:key] = key
end
add_option('-s', '--sign CERT',
'Signs CERT with the key from -K',
'and the certificate from -C') do |cert_file, options|
raise OptionParser::InvalidArgument, "#{cert_file}: does not exist" unless
File.file? cert_file
options[:sign] << cert_file
end
end
def execute
options[:add].each do |certificate|
Gem::Security.trust_dir.trust_cert certificate
say "Added '#{certificate.subject}'"
end
options[:remove].each do |filter|
certificates_matching filter do |certificate, path|
FileUtils.rm path
say "Removed '#{certificate.subject}'"
end
end
options[:list].each do |filter|
certificates_matching filter do |certificate, _|
# this could probably be formatted more gracefully
say certificate.subject.to_s
end
end
options[:build].each do |name|
build name
end
unless options[:sign].empty? then
load_default_cert unless options[:issuer_cert]
load_default_key unless options[:key]
end
options[:sign].each do |cert_file|
sign cert_file
end
end
def build name
key = options[:key] || Gem::Security.create_key
cert = Gem::Security.create_cert_email name, key
key_path = Gem::Security.write key, "gem-private_key.pem"
cert_path = Gem::Security.write cert, "gem-public_cert.pem"
say "Certificate: #{cert_path}"
say "Private Key: #{key_path}"
say "Don't forget to move the key file to somewhere private!"
end
def certificates_matching filter
return enum_for __method__, filter unless block_given?
Gem::Security.trusted_certificates.select do |certificate, _|
subject = certificate.subject.to_s
subject.downcase.index filter
end.sort_by do |certificate, _|
certificate.subject.to_a.map { |name, data,| [name, data] }
end.each do |certificate, path|
yield certificate, path
end
end
def description # :nodoc:
<<-EOF
The cert command manages signing keys and certificates for creating signed
gems. Your signing certificate and private key are typically stored in
~/.gem/gem-public_cert.pem and ~/.gem/gem-private_key.pem respectively.
To build a certificate for signing gems:
gem cert --build you@example
If you already have an RSA key, or are creating a new certificate for an
existing key:
gem cert --build you@example --private-key /path/to/key.pem
If you wish to trust a certificate you can add it to the trust list with:
gem cert --add /path/to/cert.pem
You can list trusted certificates with:
gem cert --list
or:
gem cert --list cert_subject_substring
If you wish to remove a previously trusted certificate:
gem cert --remove cert_subject_substring
To sign another gem author's certificate:
gem cert --sign /path/to/other_cert.pem
For further reading on signing gems see `ri Gem::Security`.
EOF
end
def load_default_cert
cert_file = File.join Gem.default_cert_path
cert = File.read cert_file
options[:issuer_cert] = OpenSSL::X509::Certificate.new cert
rescue Errno::ENOENT
alert_error \
"--certificate not specified and ~/.gem/gem-public_cert.pem does not exist"
terminate_interaction 1
rescue OpenSSL::X509::CertificateError
alert_error \
"--certificate not specified and ~/.gem/gem-public_cert.pem is not valid"
terminate_interaction 1
end
def load_default_key
key_file = File.join Gem.default_key_path
key = File.read key_file
options[:key] = OpenSSL::PKey::RSA.new key
rescue Errno::ENOENT
alert_error \
"--private-key not specified and ~/.gem/gem-private_key.pem does not exist"
terminate_interaction 1
rescue OpenSSL::PKey::RSAError
alert_error \
"--private-key not specified and ~/.gem/gem-private_key.pem is not valid"
terminate_interaction 1
end
def sign cert_file
cert = File.read cert_file
cert = OpenSSL::X509::Certificate.new cert
permissions = File.stat(cert_file).mode & 0777
issuer_cert = options[:issuer_cert]
issuer_key = options[:key]
cert = Gem::Security.sign cert, issuer_key, issuer_cert
Gem::Security.write cert, cert_file, permissions
end
end