Вот как я могу сделать это с phpseclib (который работает):

<?php
include('Crypt/RSA.php');

$rsa = new Crypt_RSA();
$rsa->setPassword('password');
$result = $rsa->loadKey('-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,E3B1C06E0D0C2633

gvmXzl6W7eV1a3N5rQNwBWKY9on3IgxZudS33cip5f88FotsPSDJMvqj6LVw2RxobDjhlOOzqmTb
VrlTnoQ6CogXFZSfiPmixiyyptCUEKJkSiEhYGM5GQm0OoGcLeLbgBb9tRpWh5IlXulKD6XFhx8q
/eGg5a+mSkX1i7kv2+Ih3jHmEKwrnfzhcA29pBF3OQJo+Ks9IYneuk676pHtsIs7CpFKq1tDvD8Q
O7URxnVnHLltaFvIxshqyZu92xbUYZR7YzjXl5+3w4TVgeAHUogEV+H9iZTosD/copUsbQO+78w2
E1D3iDS94wRgx0Tjv4xlwrTpOV38FS5rdL32492DcCRlCYM4VtuwjYeWi5shJg69jCb0EwGRqfAo
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9qcSK6tPSrjK1LPlnOOppFgDElZaZ0rxsgjtiWSIAEw/Ad+SIM5u+vqwzF8J317JlsdKoBFDw8mS
MxCMuMksKJ23mgvY+THRIVgH3E7lEDZQzCi1Uy6ldLJcran/6wHwP88pVM2odiHkpnrJGcEBbbIk
qsxJZhFT8aUt/cUEBj3fnP7cxoNLQfTHMPqUTqKBWaVufFzGU9YB1R+XWFULLddwJHnV7gPheBlk
MDapowb+Is77+a9Y2VDsOXEvNpqTY0giiSrckG05IZnrhJ24JnSCwyNd99lm7XKdEGGrjBCMqIyI
Fqox8Ahkv3KWAJPYK1eOCc5d/KwZHlnlFJq7ZYy9u3fEnxQCjOEmeXLkLangKA==
-----END RSA PRIVATE KEY-----');

echo $result ? 'true' : 'false';
?>

Однако для сравнения я пытаюсь сделать это с помощью OpenSSL. Вот мой код:

<?php
$pkey = openssl_pkey_get_private('-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,E3B1C06E0D0C2633

gvmXzl6W7eV1a3N5rQNwBWKY9on3IgxZudS33cip5f88FotsPSDJMvqj6LVw2RxobDjhlOOzqmTb
VrlTnoQ6CogXFZSfiPmixiyyptCUEKJkSiEhYGM5GQm0OoGcLeLbgBb9tRpWh5IlXulKD6XFhx8q
/eGg5a+mSkX1i7kv2+Ih3jHmEKwrnfzhcA29pBF3OQJo+Ks9IYneuk676pHtsIs7CpFKq1tDvD8Q
O7URxnVnHLltaFvIxshqyZu92xbUYZR7YzjXl5+3w4TVgeAHUogEV+H9iZTosD/copUsbQO+78w2
E1D3iDS94wRgx0Tjv4xlwrTpOV38FS5rdL32492DcCRlCYM4VtuwjYeWi5shJg69jCb0EwGRqfAo
xko+lbKWELTuFKwD7n1rc/2fTarbGuf8S2AEggBLZyfXHC/9N84mXLFO2XKq+0WdiEFhQj2Cze+a
9qcSK6tPSrjK1LPlnOOppFgDElZaZ0rxsgjtiWSIAEw/Ad+SIM5u+vqwzF8J317JlsdKoBFDw8mS
MxCMuMksKJ23mgvY+THRIVgH3E7lEDZQzCi1Uy6ldLJcran/6wHwP88pVM2odiHkpnrJGcEBbbIk
qsxJZhFT8aUt/cUEBj3fnP7cxoNLQfTHMPqUTqKBWaVufFzGU9YB1R+XWFULLddwJHnV7gPheBlk
MDapowb+Is77+a9Y2VDsOXEvNpqTY0giiSrckG05IZnrhJ24JnSCwyNd99lm7XKdEGGrjBCMqIyI
Fqox8Ahkv3KWAJPYK1eOCc5d/KwZHlnlFJq7ZYy9u3fEnxQCjOEmeXLkLangKA==
-----END RSA PRIVATE KEY-----', 'password');
if ($pkey === false) exit('FAILURE');
openssl_pkey_export($pkey, $out_key_file);
echo $out_key_file;
?>

Единственная проблема: код преждевременно умирает, отражая неудачу. то есть. openssl_pkey_get_private () не загружает ключ. openssl_error_string говорит: «ошибка: 0906D066: процедуры PEM: PEM_read_bio: неверный конец строки».

Есть идеи?