Crypt::PK::ECC(3)

User Contributed Perl Documentation

Crypt::PK::ECC(3)

NAME¶

Crypt::PK::ECC - Public key cryptography based on EC

SYNOPSIS¶

 ### OO interface
 my $message = 'hello world';
 my $alice = Crypt::PK::ECC->new();
 $alice->generate_key('secp256r1');
 my $alice_public_der = $alice->export_key_der('public');
 my $alice_public = Crypt::PK::ECC->new(\$alice_public_der);
 my $ciphertext = $alice_public->encrypt($message);
 my $plaintext = $alice->decrypt($ciphertext);
 my $signature = $alice->sign_message($message);
 $alice_public->verify_message($signature, $message) or die "ERROR";
 my $bob = Crypt::PK::ECC->new();
 $bob->generate_key('secp256r1');
 my $bob_public_der = $bob->export_key_der('public');
 my $bob_public = Crypt::PK::ECC->new(\$bob_public_der);
 my $alice_secret = $alice->shared_secret($bob_public);
 my $bob_secret = $bob->shared_secret($alice_public);
 my $private_der = $alice->export_key_der('private');
 my $public_pem = $alice_public->export_key_pem('public');
 my $public_raw = $alice_public->export_key_raw('public');

DESCRIPTION¶

The module provides a set of core ECC functions as well as implementation of ECDSA and ECDH.

Supports elliptic curves "y^2 = x^3 + a*x + b" over prime fields "Fp = Z/pZ" (binary fields not supported).

Legacy function-style wrappers still exist in code for backwards compatibility, but they are intentionally undocumented.

METHODS¶

new¶

 my $pk = Crypt::PK::ECC->new();
 #or
 my $source = Crypt::PK::ECC->new();
 $source->generate_key('secp256r1');
 my $public_der = $source->export_key_der('public');
 my $pub = Crypt::PK::ECC->new(\$public_der);
 my $private_pem = $source->export_key_pem('private', 'secret', 'AES-256-CBC');
 my $priv = Crypt::PK::ECC->new(\$private_pem, 'secret');

Passing $filename or "\$buffer" to "new" is equivalent: both forms immediately import the key material into the new object.

generate_key¶

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

 $pk->generate_key($curve_name);
 #or
 $pk->generate_key($hashref_with_curve_params);

The following predefined $curve_name values are supported:

 # curves from https://www.rfc-editor.org/rfc/rfc5639
 'brainpoolp160r1'
 'brainpoolp192r1'
 'brainpoolp224r1'
 'brainpoolp256r1'
 'brainpoolp320r1'
 'brainpoolp384r1'
 'brainpoolp512r1'
 # curve from https://www.legifrance.gouv.fr/jorf/id/JORFTEXT000024668816
 'frp256v1'
 # curves from https://www.secg.org/sec2-v2.pdf
 'secp112r1'
 'secp112r2'
 'secp128r1'
 'secp128r2'
 'secp160k1'
 'secp160r1'
 'secp160r2'
 'secp192k1'
 'secp192r1'   ... same as nistp192, prime192v1
 'secp224k1'
 'secp224r1'   ... same as nistp224
 'secp256k1'   ... used by Bitcoin
 'secp256r1'   ... same as nistp256, prime256v1
 'secp384r1'   ... same as nistp384
 'secp521r1'   ... same as nistp521
 #curves from https://csrc.nist.gov/pubs/fips/186-4/final
 'nistp192'    ... same as secp192r1, prime192v1
 'nistp224'    ... same as secp224r1
 'nistp256'    ... same as secp256r1, prime256v1
 'nistp384'    ... same as secp384r1
 'nistp521'    ... same as secp521r1
 # curves from ANS X9.62
 'prime192v1'   ... same as nistp192, secp192r1
 'prime192v2'
 'prime192v3'
 'prime239v1'
 'prime239v2'
 'prime239v3'
 'prime256v1'   ... same as nistp256, secp256r1

Using custom curve parameters:

 $pk->generate_key({ prime    => 'FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF',
                     A        => 'FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFC',
                     B        => '22123DC2395A05CAA7423DAECCC94760A7D462256BD56916',
                     Gx       => '7D29778100C65A1DA1783716588DCE2B8B4AEE8E228F1896',
                     Gy       => '38A90F22637337334B49DCB66A6DC8F9978ACA7648A943B0',
                     order    => 'FFFFFFFFFFFFFFFFFFFFFFFF7A62D031C83F4294F640EC13',
                     cofactor => 1 });

See <https://csrc.nist.gov/pubs/fips/186-4/final>, <https://www.secg.org/sec2-v2.pdf>, <https://www.rfc-editor.org/rfc/rfc5639>

import_key¶

Loads private or public key in DER or PEM format.

 my $source = Crypt::PK::ECC->new();
 $source->generate_key('secp256r1');
 my $public_der = $source->export_key_der('public');
 my $pub = Crypt::PK::ECC->new();
 $pub->import_key(\$public_der);
 my $private_pem = $source->export_key_pem('private', 'secret', 'AES-256-CBC');
 my $priv = Crypt::PK::ECC->new();
 $priv->import_key(\$private_pem, 'secret');

The same method also accepts filenames instead of buffers.

Loading private or public keys from a Perl HASH:

 $pk->import_key($hashref);
 # the $hashref is either a key exported via key2hash
 $pk->import_key({
      curve_A        => "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC",
      curve_B        => "1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45",
      curve_bits     => 160,
      curve_bytes    => 20,
      curve_cofactor => 1,
      curve_Gx       => "4A96B5688EF573284664698968C38BB913CBFC82",
      curve_Gy       => "23A628553168947D59DCC912042351377AC5FB32",
      curve_order    => "0100000000000000000001F4C8F927AED3CA752257",
      curve_prime    => "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF",
      k              => "B0EE84A749FE95DF997E33B8F333E12101E824C3",
      pub_x          => "5AE1ACE3ED0AEA9707CE5C0BCE014F6A2F15023A",
      pub_y          => "895D57E992D0A15F88D6680B27B701F615FCDC0F",
 });
 # or with the curve defined just by name
 $pk->import_key({
      curve_name => "secp160r1",
      k          => "B0EE84A749FE95DF997E33B8F333E12101E824C3",
      pub_x      => "5AE1ACE3ED0AEA9707CE5C0BCE014F6A2F15023A",
      pub_y      => "895D57E992D0A15F88D6680B27B701F615FCDC0F",
 });
 # or a hash with items corresponding to JWK (JSON Web Key)
 $pk->import_key({
       kty => "EC",
       crv => "P-256",
       x   => "MKBCTNIcKUSDii11ySs3526iDZ8AiTo7Tu6KPAqv7D4",
       y   => "4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM",
       d   => "870MB6gfuTJ4HtUnUvYMyJpr5eUZNP4Bk43bVdj3eAE",
 });

Supported key formats:

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

EC private keys with with all curve parameters

EC private keys with curve defined by OID (short form)

EC private keys with curve defined by OID + compressed form (supported since: CryptX-0.059)

 -----BEGIN EC PRIVATE KEY-----
 MFcCAQEEIBG1c3z52T8XwMsahGVdOZWgKCQJfv+l7djuJjgetdbDoAoGCCqGSM49
 AwEHoSQDIgADoBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE=
 -----END EC PRIVATE KEY-----

EC private keys in password protected PEM format

EC public keys with all curve parameters

EC public keys with curve defined by OID (short form)

 -----BEGIN PUBLIC KEY-----
 MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEoBUyo8CQAFPeYPvv78ylh5MwFZjT
 CLQeb042TjiMJxG+9DLFmRSMlBQ9T/RsLLc+PmpB1+7yPAR+oR5gZn3kJQ==
 -----END PUBLIC KEY-----

EC public keys with curve defined by OID + public point in compressed form (supported since: CryptX-0.059)

 -----BEGIN PUBLIC KEY-----
 MDkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDIgADoBUyo8CQAFPeYPvv78ylh5MwFZjT
 CLQeb042TjiMJxE=
 -----END PUBLIC KEY-----

PKCS#8 private keys with all curve parameters

PKCS#8 private keys with curve defined by OID (short form)

PKCS#8 encrypted private keys - password protected keys (supported since: CryptX-0.059)

EC public key from X509 certificate

SSH public EC keys

 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNT...T3xYfJIs=

SSH public EC keys (RFC-4716 format)

 ---- BEGIN SSH2 PUBLIC KEY ----
 Comment: "521-bit ECDSA, converted from OpenSSH"
 AAAAE2VjZHNhLXNoYTItbmlzdHA1MjEAAAAIbmlzdHA1MjEAAACFBAFk35srteP9twCwYK
 vU9ovMBi77Dd6lEBPrFaMEb0CZdZ5MC3nSqflGHRWkSbUpjdPdO7cYQNpK9YXHbNSO5hbU
 1gFZgyiGFxwJYYz8NAjedBXMgyH4JWplK5FQm5P5cvaglItC9qkKioUXhCc67YMYBtivXl
 Ue0PgIq6kbHTqbX6+5Nw==
 ---- END SSH2 PUBLIC KEY ----

EC private keys in JSON Web Key (JWK) format

See <https://www.rfc-editor.org/rfc/rfc7517>

 {
  "kty":"EC",
  "crv":"P-256",
  "x":"MKBCTNIcKUSDii11ySs3526iDZ8AiTo7Tu6KPAqv7D4",
  "y":"4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM",
  "d":"870MB6gfuTJ4HtUnUvYMyJpr5eUZNP4Bk43bVdj3eAE",
 }

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

EC public keys in JSON Web Key (JWK) format

 {
  "kty":"EC",
  "crv":"P-256",
  "x":"MKBCTNIcKUSDii11ySs3526iDZ8AiTo7Tu6KPAqv7D4",
  "y":"4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM",
 }

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

import_key_raw¶

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

 $pk->import_key_raw($key, $curve);
 # $key .... [binary string] data exported by export_key_raw()
 # $curve .. [string | hashref] curve name or hashref with curve parameters - same as by generate_key()

export_key_der¶

Returns the key as a binary DER-encoded string.

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

Since CryptX-0.36 "export_key_der" can also export keys in a format that does not explicitly contain curve parameters but only curve OID.

 my $private_der = $pk->export_key_der('private_short');
 #or
 my $public_der = $pk->export_key_der('public_short');

Since CryptX-0.59 "export_key_der" can also export keys in "compressed" format that defines curve by OID + stores public point in compressed form.

 my $private_pem = $pk->export_key_der('private_compressed');
 #or
 my $public_pem = $pk->export_key_der('public_compressed');

export_key_pem¶

Returns the key as a PEM-encoded string (ASCII).

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

Since CryptX-0.36 "export_key_pem" can also export keys in a format that does not explicitly contain curve parameters but only curve OID.

 my $private_pem = $pk->export_key_pem('private_short');
 #or
 my $public_pem = $pk->export_key_pem('public_short');

Since CryptX-0.59 "export_key_pem" can also export keys in "compressed" format that defines curve by OID + stores public point in compressed form.

 my $private_pem = $pk->export_key_pem('private_compressed');
 #or
 my $public_pem = $pk->export_key_pem('public_compressed');

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¶

Since: CryptX-0.022

Returns a JSON string, or a hashref if the optional second argument is true.

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_jwk_thumbprint¶

Since: CryptX-0.031

Exports the key's JSON Web Key Thumbprint as a string.

If you don't know what this is, see RFC 7638 <https://www.rfc-editor.org/rfc/rfc7638>.

 my $thumbprint = $pk->export_key_jwk_thumbprint('SHA256');

export_key_raw¶

Returns the raw key as a binary string.

Export raw public/private key. Public key is exported in ASN X9.62 format (compressed or uncompressed), private key is exported as raw bytes (padded with leading zeros to have the same size as the ECC curve).

 my $pubkey_octets  = $pk->export_key_raw('public');
 #or
 my $pubckey_octets = $pk->export_key_raw('public_compressed');
 #or
 my $privkey_octets = $pk->export_key_raw('private');

encrypt¶

Returns the ciphertext as a binary string.

 my $pk = Crypt::PK::ECC->new($pub_key_filename);
 my $ct = $pk->encrypt($message);
 #or
 my $ct = $pk->encrypt($message, $hash_name);
 # $hash_name .. [string] 'SHA1' (DEFAULT), 'SHA256' or any other hash supported by Crypt::Digest

decrypt¶

Returns the plaintext as a binary string.

 my $pk = Crypt::PK::ECC->new($priv_key_filename);
 my $pt = $pk->decrypt($ciphertext);

sign_message¶

Returns the signature as a binary string.

 my $pk = Crypt::PK::ECC->new($priv_key_filename);
 my $signature = $pk->sign_message($message);
 #or
 my $signature = $pk->sign_message($message, $hash_name);
 # $hash_name .. [string] 'SHA1' (DEFAULT), 'SHA256' or any other hash supported by Crypt::Digest

For ECDSA with SHAKE per RFC 8702 <https://www.rfc-editor.org/rfc/rfc8702> use 'SHAKE128' (output 32 bytes) or 'SHAKE256' (output 64 bytes); the fixed output sizes match the ones required by the ecdsa-with-shake128 and ecdsa-with-shake256 OIDs.

 my $sig = $pk->sign_message($message, 'SHAKE128');   # ecdsa-with-shake128
 my $sig = $pk->sign_message($message, 'SHAKE256');   # ecdsa-with-shake256

sign_message_rfc7518¶

Since: CryptX-0.024

Same as sign_message only the signature format is as defined by <https://www.rfc-editor.org/rfc/rfc7518> (JWA - JSON Web Algorithms).

BEWARE: This creates signatures according to the structure that RFC 7518 describes but does not apply the RFC logic for the hashing algorithm selection. You'll still need to specify, e.g., SHA256 for a P-256 key to get a fully RFC-7518-compliant signature.

verify_message¶

Returns 1 if the signature is valid, 0 otherwise.

 my $pk = Crypt::PK::ECC->new($pub_key_filename);
 my $valid = $pk->verify_message($signature, $message);
 #or
 my $valid = $pk->verify_message($signature, $message, $hash_name);
 # $hash_name .. [string] 'SHA1' (DEFAULT), 'SHA256' or any other hash supported by Crypt::Digest

verify_message_rfc7518¶

Since: CryptX-0.024

Same as verify_message only the signature format is as defined by <https://www.rfc-editor.org/rfc/rfc7518> (JWA - JSON Web Algorithms).

BEWARE: This verifies signatures according to the structure that RFC 7518 describes but does not apply the RFC logic for the hashing algorithm selection. You'll still need to specify, e.g., SHA256 for a P-256 key to get a fully RFC-7518-compliant signature.

sign_hash¶

Returns the signature as a binary string.

 my $pk = Crypt::PK::ECC->new($priv_key_filename);
 my $signature = $pk->sign_hash($message_hash, $deterministic_hash_name);
 # $deterministic_hash_name .. [string] 'SHA1', 'SHA256' or any other hash supported by Crypt::Digest
 #      in most cases it will be the same as used to create $message_hash, if not provided non-deterministic
 #      signature will be created

Since: CryptX-0.081

sign_hash_eth¶

Same as sign_hash but returns the signature in Ethereum format: 32-byte "r" value, 32-byte "s" value, 1-byte recovery ID (27 or 28). Total output is always exactly 65 bytes.

sign_hash_rfc7518¶

Since: CryptX-0.059

Same as sign_hash only the signature format is as defined by <https://www.rfc-editor.org/rfc/rfc7518> (JWA - JSON Web Algorithms).

verify_hash¶

Returns 1 if the signature is valid, 0 otherwise.

 my $pk = Crypt::PK::ECC->new($pub_key_filename);
 my $valid = $pk->verify_hash($signature, $message_hash);

verify_hash_rfc7518¶

Since: CryptX-0.081

Same as verify_hash only the signature format is as defined by <https://www.rfc-editor.org/rfc/rfc7518> (JWA - JSON Web Algorithms).

verify_hash_eth¶

Returns 1 if the signature is valid, 0 otherwise. Same as verify_hash but expects the signature in Ethereum format (65 bytes: r || s || recovery_id). Compatible with signatures generated by sign_hash_eth.

recovery_pub_eth¶

Alternative method to verify a signature with recovery of the public key. Mainly used in Ethereum-like blockchain networks. This method will recover public key from ECDSA signature in Ethereum format (see sign_hash_eth).

 my $pk = Crypt::PK::ECC->new($priv_key_filename);
 my $signature = $pk->sign_hash_eth($message_hash);
 my $pub_key = $pk->recovery_pub_eth($signature, $message_hash);

recovery_pub¶

Recovers the public key from an ECDSA signature produced by "sign_hash". Returns a new Crypt::PK::ECC object containing the recovered public key.

Unlike "recovery_pub_eth", the standard DER-encoded signature does not embed the recovery identifier, so $recid must be supplied explicitly.

 my $pk = Crypt::PK::ECC->new($priv_key_filename);
 my $signature = $pk->sign_hash($message_hash);
 my $pub_key = $pk->recovery_pub($signature, $message_hash, $recid);
 # $signature .... [binary string] binary DER-encoded ECDSA signature (from sign_hash)
 # $message_hash . [binary string] the hash that was signed
 # $recid ........ [integer] recovery identifier, 0 or 1 (selects which of the
 #                 two possible public keys corresponds to the signature)

recovery_pub_rfc7518¶

Since: CryptX-0.059

Same as recovery_pub_eth, but compatible with sign_hash_rfc7518 signatures. The main difference is that $recid is required, because an RFC 7518 signature does not contain the recovery bit, so you must specify it explicitly.

 my $pk = Crypt::PK::ECC->new($priv_key_filename);
 my $signature = $pk->sign_hash_rfc7518($message_hash);
 my $pub_key = $pk->recovery_pub_rfc7518($signature, $message_hash, $recid);

shared_secret¶

Returns the shared secret as a binary string (raw bytes).

  # Alice having her priv key $pk and Bob's public key $pkb
  my $pk  = Crypt::PK::ECC->new($priv_key_filename);
  my $pkb = Crypt::PK::ECC->new($pub_key_filename);
  my $shared_secret = $pk->shared_secret($pkb);
  # Bob having his priv key $pk and Alice's public key $pka
  my $pk = Crypt::PK::ECC->new($priv_key_filename);
  my $pka = Crypt::PK::ECC->new($pub_key_filename);
  my $shared_secret = $pk->shared_secret($pka);  # same value as computed by Alice

is_private¶

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

size¶

 my $size = $pk->size;
 # returns key size in bytes or undef if no key loaded

key2hash¶

Returns a hashref with the key components, or "undef" if no key is loaded.

 my $hash = $pk->key2hash;
 # returns hash like this (or undef if no key loaded):
 {
   size           => 20, # integer: key (curve) size in bytes
   type           => 1,  # integer: 1 .. private, 0 .. public
   #curve parameters
   curve_A        => "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC",
   curve_B        => "1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45",
   curve_bits     => 160,
   curve_bytes    => 20,
   curve_cofactor => 1,
   curve_Gx       => "4A96B5688EF573284664698968C38BB913CBFC82",
   curve_Gy       => "23A628553168947D59DCC912042351377AC5FB32",
   curve_name     => "secp160r1",
   curve_order    => "0100000000000000000001F4C8F927AED3CA752257",
   curve_prime    => "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF",
   #private key
   k              => "B0EE84A749FE95DF997E33B8F333E12101E824C3",
   #public key point coordinates
   pub_x          => "5AE1ACE3ED0AEA9707CE5C0BCE014F6A2F15023A",
   pub_y          => "895D57E992D0A15F88D6680B27B701F615FCDC0F",
 }

curve2hash¶

Since: CryptX-0.024

 my $crv = $pk->curve2hash;
 # returns a hash that can be passed to: $pk->generate_key($crv)
 {
   A        => "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC",
   B        => "1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45",
   cofactor => 1,
   Gx       => "4A96B5688EF573284664698968C38BB913CBFC82",
   Gy       => "23A628553168947D59DCC912042351377AC5FB32",
   order    => "0100000000000000000001F4C8F927AED3CA752257",
   prime    => "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF",
 }

OpenSSL interoperability¶

 ### let's have:
 # ECC private key in PEM format - eckey.priv.pem
 # ECC public key in PEM format  - eckey.pub.pem
 # data file to be signed - input.data

Sign by OpenSSL, verify by Crypt::PK::ECC¶

Create signature (from commandline):

 openssl dgst -sha1 -sign eckey.priv.pem -out input.sha1-ec.sig input.data

Verify signature (Perl code):

 use Crypt::PK::ECC;
 use Crypt::Digest 'digest_file';
 use Crypt::Misc 'read_rawfile';
 my $pkec = Crypt::PK::ECC->new("eckey.pub.pem");
 my $signature = read_rawfile("input.sha1-ec.sig");
 my $valid = $pkec->verify_hash($signature, digest_file("SHA1", "input.data"));
 print $valid ? "SUCCESS" : "FAILURE";

Sign by Crypt::PK::ECC, verify by OpenSSL¶

Create signature (Perl code):

 use Crypt::PK::ECC;
 use Crypt::Digest 'digest_file';
 use Crypt::Misc 'write_rawfile';
 my $pkec = Crypt::PK::ECC->new("eckey.priv.pem");
 my $signature = $pkec->sign_hash(digest_file("SHA1", "input.data"));
 write_rawfile("input.sha1-ec.sig", $signature);

Verify signature (from commandline):

 openssl dgst -sha1 -verify eckey.pub.pem -signature input.sha1-ec.sig input.data

Keys generated by Crypt::PK::ECC¶

Generate keys (Perl code):

 use Crypt::PK::ECC;
 use Crypt::Misc 'write_rawfile';
 my $pkec = Crypt::PK::ECC->new;
 $pkec->generate_key('secp160k1');
 write_rawfile("eckey.pub.der",  $pkec->export_key_der('public'));
 write_rawfile("eckey.priv.der", $pkec->export_key_der('private'));
 write_rawfile("eckey.pub.pem",  $pkec->export_key_pem('public'));
 write_rawfile("eckey.priv.pem", $pkec->export_key_pem('private'));
 write_rawfile("eckey-passwd.priv.pem", $pkec->export_key_pem('private', 'secret'));

Use keys by OpenSSL:

 openssl ec -in eckey.priv.der -text -inform der
 openssl ec -in eckey.priv.pem -text
 openssl ec -in eckey-passwd.priv.pem -text -inform pem -passin pass:secret
 openssl ec -in eckey.pub.der -pubin -text -inform der
 openssl ec -in eckey.pub.pem -pubin -text

Keys generated by OpenSSL¶

Generate keys:

 openssl ecparam -param_enc explicit -name prime192v3 -genkey -out eckey.priv.pem
 openssl ec -param_enc explicit -in eckey.priv.pem -out eckey.pub.pem -pubout
 openssl ec -param_enc explicit -in eckey.priv.pem -out eckey.priv.der -outform der
 openssl ec -param_enc explicit -in eckey.priv.pem -out eckey.pub.der -outform der -pubout
 openssl ec -param_enc explicit -in eckey.priv.pem -out eckey.privc.der -outform der -conv_form compressed
 openssl ec -param_enc explicit -in eckey.priv.pem -out eckey.pubc.der -outform der -pubout -conv_form compressed
 openssl ec -param_enc explicit -in eckey.priv.pem -passout pass:secret -des3 -out eckey-passwd.priv.pem

Load keys (Perl code):

 use Crypt::PK::ECC;
 my $pkec = Crypt::PK::ECC->new;
 $pkec->import_key("eckey.pub.der");
 $pkec->import_key("eckey.pubc.der");
 $pkec->import_key("eckey.priv.der");
 $pkec->import_key("eckey.privc.der");
 $pkec->import_key("eckey.pub.pem");
 $pkec->import_key("eckey.priv.pem");
 $pkec->import_key("eckey-passwd.priv.pem", "secret");

Source file:	Crypt::PK::ECC.3pm.en.gz (from perl-CryptX 0.89.0-1.1)
Source last updated:	2026-05-11T08:37:41Z
Converted to HTML:	2026-05-26T00:49:37Z

NAME¶

SYNOPSIS¶

DESCRIPTION¶

METHODS¶

new¶

generate_key¶

import_key¶

import_key_raw¶

export_key_der¶

export_key_pem¶

export_key_jwk¶

export_key_jwk_thumbprint¶

export_key_raw¶

encrypt¶

decrypt¶

sign_message¶

sign_message_rfc7518¶

verify_message¶

verify_message_rfc7518¶

sign_hash¶

sign_hash_eth¶

sign_hash_rfc7518¶

verify_hash¶

verify_hash_rfc7518¶

verify_hash_eth¶

recovery_pub_eth¶

recovery_pub¶

recovery_pub_rfc7518¶

shared_secret¶

is_private¶

size¶

key2hash¶

curve2hash¶

OpenSSL interoperability¶

Sign by OpenSSL, verify by Crypt::PK::ECC¶

Sign by Crypt::PK::ECC, verify by OpenSSL¶

Keys generated by Crypt::PK::ECC¶

Keys generated by OpenSSL¶

SEE ALSO¶