(PECL rnp >= 0.1.1)
rnp_op_encrypt — Encrypt message
$ffi,$message,$recipient_keys_fp,$options = ?
ffiThe FFI object returned by rnp_ffi_create().
messageMessage to be encrypted.
recipient_keys_fpArray with fingerprints of recipient's keys. At least one key must be present.
optionsAn associative array with options.
| Key | Data type | Descrizione | 
|---|---|---|
"compression_alg" | 
         string | Compression algorithm. Both
	   "compression_alg" and "compression_level"
	   must be set in order to enable data compression.
	  | 
        
"compression_level" | 
         integer | Compression level, 0-9. 0 disables compression. | 
"armor" | 
         boolean | Enable ASCII-armored output. Disabled by default. | 
"add_signature" | 
         boolean | Encrypted message will be also signed. | 
"hash" | 
         string | Set hash algorithm used during signature calculation. "add_signature" option should be set to true | 
        
"creation_time" | 
         integer | Set signature creation time in seconds since Jan, 1 1970 UTC. By default current time is used. | 
"expiration_time" | 
         integer | Set signature expiration time in seconds since the creation time. 0 value is used to mark signature as non-expiring (default value). | 
"password" | 
         string | Add password which is used to encrypt data. | 
"cipher" | 
         string | Set symmetric encryption algorithm. Possible values are "IDEA", "TRIPLEDES", "CAST5", "BLOWFISH", "AES128", "AES192", "AES256", "TWOFISH", "CAMELLIA128", "CAMELLIA192", "CAMELLIA256", "SM4". | 
"aead" | 
         string | Set AEAD mode algorithm. Possible values are "None" to disable AEAD, "EAX", "OCB". | 
"aead_bits" | 
         integer | Set chunk length for AEAD mode via number of chunk size bits. Must be between 0 to 56. | 
"flags" | 
         integer | Set additional encryption flags. Supported flags: RNP_ENCRYPT_NOWRAP - do not wrap the data in a literal data packet. This would allow to encrypt already signed data. | 
"file_name" | 
         string | Set the internally stored file name for the data being encrypted. Special value _CONSOLE may be used to mark message as 'for your eyes only', i.e. it should not be stored anywhere but only displayed to the receiver. Default is the empty string. | 
"file_mtime" | 
         integer | Set input file modification date in seconds since Jan, 1 1970 UTC. | 
   Encrypted data on success o false in caso di fallimento.