openssl_pkey_get_public not open public key, “no start line” error

StackOverflow https://stackoverflow.com/questions/3617293

  •  26-09-2019
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Question

When generating public key and then reading it with function openssl_pkey_get_public - $publicKeyResource = bool(false) and message: error:0906D06C:PEM routines:PEM_read_bio:no start line

$privateKey = openssl_pkey_new(array('private_key_bits' => 2048, 'private_key_type' => OPENSSL_KEYTYPE_RSA));

$keyDetails = openssl_pkey_get_details($privateKey);

$publicKeyResource = openssl_pkey_get_public($keyDetails['key']);

What is wrong?

P.S. 

privateKey = 

array(3) {
  ["bits"]=>int(2048)

  ["key"]=>
  string(451) "-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApo5lpSuSQmAOXfqAmexj
IzjdGnd1X1gCKj5ko2DHgcR4XBlj1hbFNs1pzXx+R/UvLXTeF7dNQ+9AgXjEeRa6
71VbNxrUgvb/PHjEANwce7xBsnbu+dcSazyNHzx4ahWyEF4f3HyaJkGrT/Dgzcut
DO+yFAH9u8Hx26cj/8kyrtIHxazemnD+IDHRa3zOjKDmTfoDRKtOMTPVgFAsYBXn
tKcLyamCSBgpwfQwKfUUcYhfY1xD9UMhVXabSSiNQOiTMuOIZUHueO8UCp/tdK6a
LprUDBQ/tVmiV7ZMeZYMjh6XnK7higJ3WZp8RmD4PPeKbtG6j2AuGpbF/ddzD62T
XwIDAQAB
-----END PUBLIC KEY-----
"

  ["type"]=>
  int(0)
}
Was it helpful?

Solution

You might have an easier time with phpseclib's Crypt_RSA. eg.

createKey(2048)); echo $publickey; ?>

More info:

http://phpseclib.sourceforge.net/

OTHER TIPS

Same answer as I gave in PHP + OpenSSL : error returned, but correct result: This is apparently caused by openssl_pkey_get_public() which wants a certificate containing your public key rather than the public key by itself – it seems to load the public key but still causes this error. See details there.

Most likely PHP's openSSL rejects key in PEM form. Try RSA form instead

Reason:

This error is usually caused by one corrupt character at the beginning of the .crt file. So, the chances are that you have an extra space, an extra character, an extra line, etc. in either the SSL Certificate file (.crt) or the SSL key.

I suspect that this must be a bug in some version of either PHP or OpenSSL, because your posted code works fine for me (with PHP 5.2.6 and OpenSSL 0.9.8g).

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