| public getFingerprintByPublicKey ( string $publicKeyString ) : string | ||
| $publicKeyString | string | RSA public key, PKCS1 encoded |
| return | string | The public key fingerprint |
public function getFingerprintByPublicKey($publicKeyString)
{
$keyResource = openssl_pkey_get_public($publicKeyString);
$keyDetails = openssl_pkey_get_details($keyResource);
$modulus = $this->sshConvertMpint($keyDetails['rsa']['n']);
$publicExponent = $this->sshConvertMpint($keyDetails['rsa']['e']);
$rsaPublicKey = pack('Na*Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($publicExponent), $publicExponent, strlen($modulus), $modulus);
return md5($rsaPublicKey);
} /**
* @test
*/
public function getFingerprintByPublicKeyCalculatesCorrectFingerprint()
{
$keyString = '-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDP7ZWzP/6x3SXyt0Al9UvyCe8D
TG6y1t7ovmWGw+D2x4BtZfbEHtNhlWHFkLLXzGKdgmzm4WjSB1fWQ1lfu5L8wY+g
HofCDIScx7AMgIB7hRB9ZMDEyWN/1vgSm8+4K4jUcD6OGLJYTSAlaQ7e2ZGaAY5h
p2P76gIh+wUlPjsr/QIDAQAB
-----END PUBLIC KEY-----';
$this->assertEquals('cfa6879e3dfcf709db4cfd8e61fdd782', $this->rsaWalletService->getFingerprintByPublicKey($keyString));
}