(PHP 5 >= 5.2.0, PHP 7, PHP 8)
openssl_pkey_get_details — Returns an array with the key details
This function returns the key details (bits, key, type).
keyResource holding the key.
   Returns an array with the key details on success or false on failure.
   Returned array has indexes bits (number of bits),
   key (string representation of the public key) and
   type (type of the key which is one of
   OPENSSL_KEYTYPE_RSA,
   OPENSSL_KEYTYPE_DSA,
   OPENSSL_KEYTYPE_DH,
   OPENSSL_KEYTYPE_EC,
   OPENSSL_KEYTYPE_X25519,
   OPENSSL_KEYTYPE_ED25519,
   OPENSSL_KEYTYPE_X448,
   OPENSSL_KEYTYPE_ED448,
   or -1 meaning unknown).
  
Depending on the key type used, additional details may be returned. Note that some elements may not always be available.
OPENSSL_KEYTYPE_RSA, an additional array key named "rsa", 
     containing the key data is returned.
    
     | Key | Опис | 
|---|---|
| "n" | modulus | 
| "e" | public exponent | 
| "d" | private exponent | 
| "p" | prime 1 | 
| "q" | prime 2 | 
| "dmp1" | exponent1, d mod (p-1) | 
| "dmq1" | exponent2, d mod (q-1) | 
| "iqmp" | coefficient, (inverse of q) mod p | 
OPENSSL_KEYTYPE_DSA, an additional array key named "dsa", 
     containing the key data is returned.
    
     | Key | Опис | 
|---|---|
| "p" | prime number (public) | 
| "q" | 160-bit subprime, q | p-1 (public) | 
| "g" | generator of subgroup (public) | 
| "priv_key" | private key x | 
| "pub_key" | public key y = g^x | 
OPENSSL_KEYTYPE_DH, an additional array key named "dh", 
     containing the key data is returned.
    
     | Key | Опис | 
|---|---|
| "p" | prime number (shared) | 
| "g" | generator of Z_p (shared) | 
| "priv_key" | private DH value x | 
| "pub_key" | public DH value g^x | 
OPENSSL_KEYTYPE_X25519,
     OPENSSL_KEYTYPE_ED25519,
     OPENSSL_KEYTYPE_X448,
     or OPENSSL_KEYTYPE_ED448
     an additional array key named
     "x25519",
     "ed25519",
     "x448",
     or "ed448" respectively,
     is returned, containing the key data.
    
     | Key | Опис | 
|---|---|
| "priv_key" | private key | 
| "pub_key" | public key | 
| Версія | Опис | 
|---|---|
| 8.4.0 | Added support for Curve25519 and Curve448 based keys.
       Specifically the x25519,ed25519,x448anded448fields have been introduced. | 
| 8.0.0 | keyaccepts an OpenSSLAsymmetricKey now;
       previously, a resource of typeOpenSSL keywas accepted. | 
