NAME

Crypt::PK::Ed25519 - Digital signature based on Ed25519

SYNOPSIS

 use Crypt::PK::Ed25519;
 #Signature: Alice
 my $priv = Crypt::PK::Ed25519->new('Alice_priv_ed25519.der');
 my $sig = $priv->sign_message($message);
 #Signature: Bob (received $message + $sig)
 my $pub = Crypt::PK::Ed25519->new('Alice_pub_ed25519.der');
 $pub->verify_message($sig, $message) or die "ERROR";
 #Load key
 my $pk = Crypt::PK::Ed25519->new;
 my $pk_hex = "A05D1AEA5830AC9A65CDFB384660D497E3697C46B419CF2CEC85DE8BD245459D";
 $pk->import_key_raw(pack("H*", $pk_hex), "public");
 my $sk = Crypt::PK::Ed25519->new;
 my $sk_hex = "45C109BA6FD24E8B67D23EFB6B92D99CD457E2137172C0D749FE2B5A0C142DAD";
 $sk->import_key_raw(pack("H*", $sk_hex), "private");
 #Key generation
 my $pk = Crypt::PK::Ed25519->new->generate_key;
 my $private_der = $pk->export_key_der('private');
 my $public_der  = $pk->export_key_der('public');
 my $private_pem = $pk->export_key_pem('private');
 my $public_pem  = $pk->export_key_pem('public');
 my $private_raw = $pk->export_key_raw('private');
 my $public_raw  = $pk->export_key_raw('public');
 my $private_jwk = $pk->export_key_jwk('private');
 my $public_jwk  = $pk->export_key_jwk('public');

DESCRIPTION

Since: CryptX-0.067

METHODS

new

 my $pk = Crypt::PK::Ed25519->new();
 #or
 my $pk = Crypt::PK::Ed25519->new($priv_or_pub_key_filename);
 #or
 my $pk = Crypt::PK::Ed25519->new(\$buffer_containing_priv_or_pub_key);

Support for password protected PEM keys

 my $pk = Crypt::PK::Ed25519->new($priv_pem_key_filename, $password);
 #or
 my $pk = Crypt::PK::Ed25519->new(\$buffer_containing_priv_pem_key, $password);

generate_key

Uses Yarrow-based cryptographically strong random number generator seeded with random data taken from "/dev/random" (UNIX) or "CryptGenRandom" (Win32).

 $pk->generate_key;

import_key

Loads private or public key in DER or PEM format.

 $pk->import_key($filename);
 #or
 $pk->import_key(\$buffer_containing_key);

Support for password protected PEM keys:

 $pk->import_key($filename, $password);
 #or
 $pk->import_key(\$buffer_containing_key, $password);

Loading private or public keys form perl hash:

 $pk->import_key($hashref);
 # the $hashref is either a key exported via key2hash
 $pk->import_key({
      curve => "ed25519",
      pub   => "A05D1AEA5830AC9A65CDFB384660D497E3697C46B419CF2CEC85DE8BD245459D",
      priv  => "45C109BA6FD24E8B67D23EFB6B92D99CD457E2137172C0D749FE2B5A0C142DAD",
 });
 # or a hash with items corresponding to JWK (JSON Web Key)
 $pk->import_key({
       kty => "OKP",
       crv => "Ed25519",
       d   => "RcEJum_STotn0j77a5LZnNRX4hNxcsDXSf4rWgwULa0",
       x   => "oF0a6lgwrJplzfs4RmDUl-NpfEa0Gc8s7IXei9JFRZ0",
 });

Supported key formats:

 # all formats can be loaded from a file
 my $pk = Crypt::PK::Ed25519->new($filename);
 # or from a buffer containing the key
 my $pk = Crypt::PK::Ed25519->new(\$buffer_with_key);

Ed25519 private keys in PEM format

 -----BEGIN ED25519 PRIVATE KEY-----
 MC4CAQAwBQYDK2VwBCIEIEXBCbpv0k6LZ9I++2uS2ZzUV+ITcXLA10n+K1oMFC2t
 -----END ED25519 PRIVATE KEY-----

Ed25519 private keys in password protected PEM format

 -----BEGIN ED25519 PRIVATE KEY-----
 Proc-Type: 4,ENCRYPTED
 DEK-Info: DES-CBC,6A64D756D49C1EFF
 8xQ7OyfQ10IITNEKcJGZA53Z1yk+NJQU7hrKqXwChZtgWNInhMBJRl9pozLKDSkH
 v7u6EOve8NY=
 -----END ED25519 PRIVATE KEY-----

PKCS#8 private keys

 -----BEGIN PRIVATE KEY-----
 MC4CAQAwBQYDK2VwBCIEIEXBCbpv0k6LZ9I++2uS2ZzUV+ITcXLA10n+K1oMFC2t
 -----END PRIVATE KEY-----

PKCS#8 encrypted private keys

Ed25519 public keys in PEM format

 -----BEGIN PUBLIC KEY-----
 MCowBQYDK2VwAyEAoF0a6lgwrJplzfs4RmDUl+NpfEa0Gc8s7IXei9JFRZ0=
 -----END PUBLIC KEY-----

Ed25519 public key from X509 certificate

SSH public Ed25519 keys

 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIL0XsiFcRDp6Hpsoak8OdiiBMJhM2UKszNTxoGS7dJ++

SSH public Ed25519 keys (RFC-4716 format)

 ---- BEGIN SSH2 PUBLIC KEY ----
 Comment: "256-bit ED25519, converted from OpenSSH"
 AAAAC3NzaC1lZDI1NTE5AAAAIL0XsiFcRDp6Hpsoak8OdiiBMJhM2UKszNTxoGS7dJ++
 ---- END SSH2 PUBLIC KEY ----

Ed25519 private keys in JSON Web Key (JWK) format
See <https://tools.ietf.org/html/rfc8037>
```
 {
  "kty":"OKP",
  "crv":"Ed25519",
  "x":"oF0a6lgwrJplzfs4RmDUl-NpfEa0Gc8s7IXei9JFRZ0",
  "d":"RcEJum_STotn0j77a5LZnNRX4hNxcsDXSf4rWgwULa0",
 }
    
```
BEWARE: For JWK support you need to have JSON module installed.
Ed25519 public keys in JSON Web Key (JWK) format
```
 {
  "kty":"OKP",
  "crv":"Ed25519",
  "x":"oF0a6lgwrJplzfs4RmDUl-NpfEa0Gc8s7IXei9JFRZ0",
 }
    
```
BEWARE: For JWK support you need to have JSON module installed.

import_key_raw

Import raw public/private key - can load raw key data exported by "export_key_raw".

 $pk->import_key_raw($key, 'public');
 $pk->import_key_raw($key, 'private');

export_key_der

 my $private_der = $pk->export_key_der('private');
 #or
 my $public_der = $pk->export_key_der('public');

export_key_pem

 my $private_pem = $pk->export_key_pem('private');
 #or
 my $public_pem = $pk->export_key_pem('public');

Support for password protected PEM keys

 my $private_pem = $pk->export_key_pem('private', $password);
 #or
 my $private_pem = $pk->export_key_pem('private', $password, $cipher);
 # supported ciphers: 'DES-CBC'
 #                    'DES-EDE3-CBC'
 #                    'SEED-CBC'
 #                    'CAMELLIA-128-CBC'
 #                    'CAMELLIA-192-CBC'
 #                    'CAMELLIA-256-CBC'
 #                    'AES-128-CBC'
 #                    'AES-192-CBC'
 #                    'AES-256-CBC' (DEFAULT)

export_key_jwk

Exports public/private keys as a JSON Web Key (JWK).

 my $private_json_text = $pk->export_key_jwk('private');
 #or
 my $public_json_text = $pk->export_key_jwk('public');

Also exports public/private keys as a perl HASH with JWK structure.

 my $jwk_hash = $pk->export_key_jwk('private', 1);
 #or
 my $jwk_hash = $pk->export_key_jwk('public', 1);

BEWARE: For JWK support you need to have JSON module installed.

export_key_raw

Export raw public/private key

 my $private_bytes = $pk->export_key_raw('private');
 #or
 my $public_bytes = $pk->export_key_raw('public');

sign_message

 my $signature = $priv->sign_message($message);

verify_message

 my $valid = $pub->verify_message($signature, $message)

is_private

 my $rv = $pk->is_private;
 # 1 .. private key loaded
 # 0 .. public key loaded
 # undef .. no key loaded

key2hash

 my $hash = $pk->key2hash;
 # returns hash like this (or undef if no key loaded):
 {
   curve => "ed25519",
   # raw public key as a hexadecimal string
   pub   => "A05D1AEA5830AC9A65CDFB384660D497E3697C46B419CF2CEC85DE8BD245459D",
   # raw private key as a hexadecimal string. undef if key is public only
   priv  => "45C109BA6FD24E8B67D23EFB6B92D99CD457E2137172C0D749FE2B5A0C142DAD",
 }