Description: ------------ When using GnuPG 2.x we call gpg-agent binary for every gpg operation except when we check the version. I think it is needed only for signing and decrypting. With this patch all tests pass: --- a/Crypt/GPG/Engine.php +++ b/Crypt/GPG/Engine.php @@ -1619,7 +1619,9 @@ class Crypt_GPG_Engine $env['LC_ALL'] = 'C'; // If using GnuPG 2.x start the gpg-agent - if (version_compare($version, '2.0.0', 'ge')) { + if (version_compare($version, '2.0.0', 'ge') + && preg_match('/--(sign|clearsign|detach-sign|decrypt)( |$)/', $this->_operation) + ) { if (!$this->_agent) { throw new Crypt_GPG_OpenSubprocessException( 'Unable to open gpg-agent subprocess (gpg-agent not found). ' .

In GnuPG 2.1: - gpg-agent is invoked for any operation with use of secret key (including import/export) - gpg-agent is started automatically by gpg So, I think we can ignore this.