DOKK / manpages / debian 12 / libcrypt-jwt-perl / Crypt::JWT.3pm.en
Crypt::JWT(3pm) User Contributed Perl Documentation Crypt::JWT(3pm)

Crypt::JWT - JSON Web Token (JWT, JWS, JWE) as defined by RFC7519, RFC7515, RFC7516

   # encoding
   use Crypt::JWT qw(encode_jwt);
   my $jws_token = encode_jwt(payload=>$data, alg=>'HS256', key=>'secret');
   my $jwe_token = encode_jwt(payload=>$data, alg=>'PBES2-HS256+A128KW', enc=>'A128GCM', key=>'secret');
   # decoding
   use Crypt::JWT qw(decode_jwt);
   my $data1 = decode_jwt(token=>$jws_token, key=>'secret');
   my $data2 = decode_jwt(token=>$jwe_token, key=>'secret');

Implements JSON Web Token (JWT) - <https://tools.ietf.org/html/rfc7519>. The implementation covers not only JSON Web Signature (JWS) - <https://tools.ietf.org/html/rfc7515>, but also JSON Web Encryption (JWE) - <https://tools.ietf.org/html/rfc7516>.

The module implements all (100%) algorithms defined in <https://tools.ietf.org/html/rfc7518> - JSON Web Algorithms (JWA).

This module supports Compact JWS/JWE and Flattened JWS/JWE JSON serialization, general JSON serialization is not supported yet.

Nothing is exported by default.

You can export selected functions:

  use Crypt::JWT qw(decode_jwt encode_jwt);

Or all of them at once:

  use Crypt::JWT ':all';


 my $data = decode_jwt(%named_args);

Named arguments:

Mandatory argument, a string with either JWS or JWE JSON Web Token. 

 ### JWS token example (3 segments)
 $t = "eyJhbGciOiJIUzI1NiJ9.dGVzdA.ujBihtLSr66CEWqN74SpLUkv28lra_CeHnxLmLNp4Jo";
 my $data = decode_jwt(token=>$t, key=>$k);
 ### JWE token example (5 segments)
 $t = "eyJlbmMiOiJBMTI4R0NNIiwiYWxnIjoiQTEyOEtXIn0.UusxEbzhGkORxTRq0xkFKhvzPrXb9smw.VGfOuq0Fxt6TsdqLZUpnxw.JajIQQ.pkKZ7MHS0XjyGmRsqgom6w";
 my $data = decode_jwt(token=>$t, key=>$k);
A key used for token decryption (JWE) or token signature validation (JWS). The value depends on the "alg" token header value. 

 JWS alg header      key value
 ------------------  ----------------------------------
 none                no key required
 HS256               string (raw octects) of any length (or perl HASH ref with JWK, kty=>'oct')
 HS384               dtto
 HS512               dtto
 RS256               public RSA key, perl HASH ref with JWK key structure,
                     a reference to SCALAR string with PEM or DER or JSON/JWK data,
                     object: Crypt::PK::RSA, Crypt::OpenSSL::RSA, Crypt::X509 or Crypt::OpenSSL::X509
 RS384               public RSA key, see RS256
 RS512               public RSA key, see RS256
 PS256               public RSA key, see RS256
 PS384               public RSA key, see RS256
 PS512               public RSA key, see RS256
 ES256               public ECC key, perl HASH ref with JWK key structure,
                     a reference to SCALAR string with PEM or DER or JSON/JWK data,
                     an instance of Crypt::PK::ECC
 ES256K              public ECC key, see ES256
 ES384               public ECC key, see ES256
 ES512               public ECC key, see ES256
 EdDSA               public Ed25519 key
 JWE alg header      key value
 ------------------  ----------------------------------
 dir                 string (raw octects) or perl HASH ref with JWK, kty=>'oct', length depends on 'enc' algorithm
 A128KW              string (raw octects) 16 bytes (or perl HASH ref with JWK, kty=>'oct')
 A192KW              string (raw octects) 24 bytes (or perl HASH ref with JWK, kty=>'oct')
 A256KW              string (raw octects) 32 bytes (or perl HASH ref with JWK, kty=>'oct')
 A128GCMKW           string (raw octects) 16 bytes (or perl HASH ref with JWK, kty=>'oct')
 A192GCMKW           string (raw octects) 24 bytes (or perl HASH ref with JWK, kty=>'oct')
 A256GCMKW           string (raw octects) 32 bytes (or perl HASH ref with JWK, kty=>'oct')
 PBES2-HS256+A128KW  string (raw octects) of any length (or perl HASH ref with JWK, kty=>'oct')
 PBES2-HS384+A192KW  string (raw octects) of any length (or perl HASH ref with JWK, kty=>'oct')
 PBES2-HS512+A256KW  string (raw octects) of any length (or perl HASH ref with JWK, kty=>'oct')
 RSA-OAEP            private RSA key, perl HASH ref with JWK key structure,
                     a reference to SCALAR string with PEM or DER or JSON/JWK data,
                     an instance of Crypt::PK::RSA or Crypt::OpenSSL::RSA
 RSA-OAEP-256        private RSA key, see RSA-OAEP
 RSA1_5              private RSA key, see RSA-OAEP
 ECDH-ES             private ECC or X25519 key, perl HASH ref with JWK key structure,
                     a reference to SCALAR string with PEM or DER or JSON/JWK data,
                     an instance of Crypt::PK::ECC
 ECDH-ES+A128KW      private ECC or X25519 key, see ECDH-ES
 ECDH-ES+A192KW      private ECC or X25519 key, see ECDH-ES
 ECDH-ES+A256KW      private ECC or X25519 key, see ECDH-ES

Example using the key from "jwk" token header:

 my $data = decode_jwt(token=>$t, key_from_jwk_header=>1);
 my ($header, $data) = decode_jwt(token=>$t, decode_header=>1, key_from_jwk_header=>1);

Examples with raw octet keys:

 #string
 my $data = decode_jwt(token=>$t, key=>'secretkey');
 #binary key
 my $data = decode_jwt(token=>$t, key=>pack("H*", "788A6E38F36B7596EF6A669E94"));
 #perl HASH ref with JWK structure (key type 'oct')
 my $data = decode_jwt(token=>$t, key=>{kty=>'oct', k=>"GawgguFyGrWKav7AX4VKUg"});

Examples with RSA keys:

 my $pem_key_string = <<'EOF';
 -----BEGIN PRIVATE KEY-----
 MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQCoVm/Sl5r+Ofky
 jioRSZK26GW6WyjyfWKddsSi13/NOtCn0rRErSF/u3QrgGMpWFqKohqbi1VVC+SZ
 ...
 8c1vm2YFafgdkSk9Qd1oU2Fv1aOQy4VovOFzJ3CcR+2r7cbRfcpLGnintHtp9yek
 02p+d5g4OChfFNDhDtnIqjvY
 -----END PRIVATE KEY-----
 EOF
 my $jwk_key_json_string = '{"kty":"RSA","n":"0vx7agoebG...L6tSoc_BJECP","e":"AQAB"}';
 #a reference to SCALAR string with PEM or DER or JSON/JWK data,
 my $data = decode_jwt(token=>$t, key=>\$pem_key_string);
 my $data = decode_jwt(token=>$t, key=>\$der_key_string);
 my $data = decode_jwt(token=>$t, key=>\$jwk_key_json_string);
 #instance of Crypt::PK::RSA
 my $data = decode_jwt(token=>$t, key=>Crypt::PK::RSA->new('keyfile.pem'));
 my $data = decode_jwt(token=>$t, key=>Crypt::PK::RSA->new(\$pem_key_string));
 #instance of Crypt::OpenSSL::RSA
 my $data = decode_jwt(token=>$t, key=>Crypt::OpenSSL::RSA->new_private_key($pem_key_string));
 #instance of Crypt::X509 (public key only)
 my $data = decode_jwt(token=>$t, key=>Crypt::X509->new(cert=>$cert));
 #instance of Crypt::OpenSSL::X509 (public key only)
 my $data = decode_jwt(token=>$t, key=>Crypt::OpenSSL::X509->new_from_file('cert.pem'));
 my $data = decode_jwt(token=>$t, key=>Crypt::OpenSSL::X509->new_from_string($cert));
 #perl HASH ref with JWK structure (key type 'RSA')
 my $rsa_priv = {
   kty => "RSA",
   n   => "0vx7agoebGcQSuuPiLJXZpt...eZu0fM4lFd2NcRwr3XPksINHaQ-G_xBniIqbw0Ls1jF44-csFCur-kEgU8awapJzKnqDKgw",
   e   => "AQAB",
   d   => "X4cTteJY_gn4FYPsXB8rdXi...FLN5EEaG6RoVH-HLKD9Mdx5ooGURknhnrRwUkC7h5fJLMWbFAKLWY2v7B6NqSzUvx0_YSf",
   p   => "83i-7IvMGXoMXCskv73TKr8...Z27zvoj6pbUQyLPBQxtPnwD20-60eTmD2ujMt5PoMrm8RmNhVWtjjMmMjOpSicFHjXOuVI",
   q   => "3dfOR9cuYq-0S-mkFLzgItg...q3hWeMuG0ouqnb3obLyuqjVZQ1dIrdgTnCdYzBcOW5r37AFXjift_NGiovonzhKpoVVS78",
   dp  => "G4sPXkc6Ya9y8oJW9_ILj4...zi_H7TkS8x5SdX3oE0oiYwxIiemTAu0UOa5pgFGyJ4c8t2VF40XRugKTP8akhFo5tA77Qe",
   dq  => "s9lAH9fggBsoFR8Oac2R_E...T2kGOhvIllTE1efA6huUvMfBcpn8lqW6vzzYY5SSF7pMd_agI3G8IbpBUb0JiraRNUfLhc",
   qi  => "GyM_p6JrXySiz1toFgKbWV...4ypu9bMWx3QJBfm0FoYzUIZEVEcOqwmRN81oDAaaBk0KWGDjJHDdDmFW3AN7I-pux_mHZG",
 };
 my $data = decode_jwt(token=>$t, key=>$rsa_priv});

Examples with ECC keys:

 my $pem_key_string = <<'EOF';
 -----BEGIN EC PRIVATE KEY-----
 MHcCAQEEIBG1c3z52T8XwMsahGVdOZWgKCQJfv+l7djuJjgetdbDoAoGCCqGSM49
 AwEHoUQDQgAEoBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxG+9DLFmRSM
 lBQ9T/RsLLc+PmpB1+7yPAR+oR5gZn3kJQ==
 -----END EC PRIVATE KEY-----
 EOF
 my $jwk_key_json_string = '{"kty":"EC","crv":"P-256","x":"MKB..7D4","y":"4Et..FyM"}';
 #a reference to SCALAR string with PEM or DER or JSON/JWK data,
 my $data = decode_jwt(token=>$t, key=>\$pem_key_string);
 my $data = decode_jwt(token=>$t, key=>\$der_key_string);
 my $data = decode_jwt(token=>$t, key=>\$jwk_key_json_string);
 #instance of Crypt::PK::ECC
 my $data = decode_jwt(token=>$t, key=>Crypt::PK::ECC->new('keyfile.pem'));
 my $data = decode_jwt(token=>$t, key=>Crypt::PK::ECC->new(\$pem_key_string));
 #perl HASH ref with JWK structure (key type 'EC')
 my $ecc_priv = {
   kty => "EC",
   crv => "P-256",
   x   => "MKBCTNIcKUSDii11ySs3526iDZ8AiTo7Tu6KPAqv7D4",
   y   => "4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM",
   d   => "870MB6gfuTJ4HtUnUvYMyJpr5eUZNP4Bk43bVdj3eAE",
 };
 my $data = decode_jwt(token=>$t, key=>$ecc_priv});
When 'key' parameter is an encrypted private RSA or ECC key this optional parameter may contain a password for private key decryption.
This parametes can be either a JWK Set JSON string (see RFC7517) or a perl HASH ref with JWK Set structure like this: 

  my $keylist = {
    keys => [
      { kid=>"key1", kty=>"oct", k=>"GawgguFyGrWKav7AX4VKUg" },
      { kid=>"key2", kty=>"oct", k=>"ulxLGy4XqhbpkR5ObGh1gX" },
    ]
  };
  my $payload = decode_jwt(token=>$t, kid_keys=>$keylist);

The structure described above is used e.g. by <https://www.googleapis.com/oauth2/v2/certs>

  use Mojo::UserAgent;
  my $ua = Mojo::UserAgent->new;
  my $google_keys => $ua->get('https://www.googleapis.com/oauth2/v2/certs')->result->json;
  my $payload = decode_jwt(token => $t, kid_keys => $google_keys);

SINCE 0.019 we also support alternative structure used e.g. by <https://www.googleapis.com/oauth2/v1/certs>:

  use LWP::Simple;
  my $google_certs = get('https://www.googleapis.com/oauth2/v1/certs');
  my $payload = decode_jwt(token => $t, kid_keys => $google_certs);

When the token header contains "kid" item the corresponding key is looked up in "kid_keys" list and used for token decoding (you do not need to pass the explicit key via "key" parameter).

INCOMPATIBLE CHANGE in 0.023: When "kid_keys" is specified it croaks if token header does not contain "kid" value or if "kid" was not found in "kid_keys".

SINCE 0.023

1 - use "jwk" header value for validating JWS signature if neither "key" nor "kid_keys" specified, BEWARE: DANGEROUS, UNSECURE!!!

0 (default) - ignore "jwk" header value when validating JWS signature

Keep in mind that enabling "key_from_jwk_header" requires "jwk" header to exist and be an valid RSA/ECDSA public key (otherwise it croaks).

1 - accept JWS tokens with "none" 'alg' header value (which means that token has no signature), BEWARE: DANGEROUS, UNSECURE!!!

0 (default) - do not allow JWS with "none" 'alg' header value

1 - do not check signature on JWS tokens, BEWARE: DANGEROUS, UNSECURE!!!

0 (default) - check signature on JWS tokens

"undef" (default) means accept all 'alg' algorithms except 'none' (for accepting 'none' use "allow_none")

"string" name of accepted 'alg' algorithm (only one)

"ARRAY ref" a list of accepted 'alg' algorithms

"Regexp" that has to match 'alg' algorithm name

 my $payload = decode_jwt(token=>$t, key=>$k, accepted_alg=>'HS256');
 #or
 my $payload = decode_jwt(token=>$t, key=>$k, accepted_alg=>['HS256','HS384']);
 #or
 my $payload = decode_jwt(token=>$t, key=>$k, accepted_alg=>qr/^HS(256|384|512)$/);
"undef" (default) means accept all 'enc' algorithms

"string" name of accepted 'enc' algorithm (only one)

"ARRAY ref" a list of accepted 'enc' algorithms

"Regexp" that has to match 'enc' algorithm name

 my $payload = decode_jwt(token=>$t, key=>$k, accepted_enc=>'A192GCM');
 #or
 my $payload = decode_jwt(token=>$t, key=>$k, accepted_enc=>['A192GCM','A256GCM']);
 #or
 my $payload = decode_jwt(token=>$t, key=>$k, accepted_enc=>qr/^A(128|192|256)GCM$/);
0 - do not decode payload, return it as a raw string (octects).

1 - decode payload from JSON string, return it as perl hash ref (or array ref) - decode_json failure means fatal error (croak).

"undef" (default) - if possible decode payload from JSON string, if decode_json fails return payload as a raw string (octets).

0 (default) - do not return decoded header as a return value of decode_jwt()

1 - return decoded header as a return value of decode_jwt()

 my $payload = decode_jwt(token=>$t, key=>$k);
 #or
 my ($header, $payload) = decode_jwt(token=>$t, key=>$k, decode_header=>1);
INCOMPATIBLE CHANGE in 0.024: If "verify_iss" is specified and claim "iss" (Issuer) is completely missing it is a failure since 0.024

"CODE ref" - subroutine (with 'iss' claim value passed as argument) should return "true" otherwise verification fails

"Regexp ref" - 'iss' claim value has to match given regexp otherwise verification fails

"Scalar" - 'iss' claim value has to be equal to given string (since 0.029)

"undef" (default) - do not verify 'iss' claim

INCOMPATIBLE CHANGE in 0.024: If "verify_aud" is specified and claim "aud" (Audience) is completely missing it is a failure since 0.024

"CODE ref" - subroutine (with 'aud' claim value passed as argument) should return "true" otherwise verification fails

"Regexp ref" - 'aud' claim value has to match given regexp otherwise verification fails

"Scalar" - 'aud' claim value has to be equal to given string (since 0.029)

"undef" (default) - do not verify 'aud' claim

INCOMPATIBLE CHANGE in 0.024: If "verify_sub" is specified and claim "sub" (Subject) is completely missing it is a failure since 0.024

"CODE ref" - subroutine (with 'sub' claim value passed as argument) should return "true" otherwise verification fails

"Regexp ref" - 'sub' claim value has to match given regexp otherwise verification fails

"Scalar" - 'sub' claim value has to be equal to given string (since 0.029)

"undef" (default) - do not verify 'sub' claim

INCOMPATIBLE CHANGE in 0.024: If "verify_jti" is specified and claim "jti" (JWT ID) is completely missing it is a failure since 0.024

"CODE ref" - subroutine (with 'jti' claim value passed as argument) should return "true" otherwise verification fails

"Regexp ref" - 'jti' claim value has to match given regexp otherwise verification fails

"Scalar" - 'jti' claim value has to be equal to given string (since 0.029)

"undef" (default) - do not verify 'jti' claim

"undef" - Issued At 'iat' claim must be valid (not in the future) if present

0 (default) - ignore 'iat' claim

1 - require valid 'iat' claim

"undef" (default) - Not Before 'nbf' claim must be valid if present

0 - ignore 'nbf' claim

1 - require valid 'nbf' claim

"undef" (default) - Expiration Time 'exp' claim must be valid if present

0 - ignore 'exp' claim

1 - require valid 'exp' claim

Tolerance in seconds related to "verify_exp", "verify_nbf" and "verify_iat". Default is 0.
1 - do not check claims (iat, exp, nbf, iss, aud, sub, jti), BEWARE: DANGEROUS, UNSECURE!!!

0 (default) - check claims

 my $token = encode_jwt(%named_args);

Named arguments:

Value of this mandatory parameter can be a string/buffer or HASH ref or ARRAY ref 

 my $token = encode_jwt(payload=>"any raw data", key=>$k, alg=>'HS256');
 #or
 my $token = encode_jwt(payload=>{a=>1,b=>2}, key=>$k, alg=>'HS256');
 #or
 my $token = encode_jwt(payload=>[11,22,33,44], key=>$k, alg=>'HS256');

HASH refs and ARRAY refs payloads are serialized as JSON strings

The 'alg' header value is mandatory for both JWE and JWS tokens.

Supported JWE 'alg' algorithms:

 dir
 A128KW
 A192KW
 A256KW
 A128GCMKW
 A192GCMKW
 A256GCMKW
 PBES2-HS256+A128KW
 PBES2-HS384+A192KW
 PBES2-HS512+A256KW
 RSA-OAEP
 RSA-OAEP-256
 RSA1_5
 ECDH-ES+A128KW
 ECDH-ES+A192KW
 ECDH-ES+A256KW
 ECDH-ES

Supported JWS algorithms:

 none   ...  no integrity (NOTE: disabled by default)
 HS256  ...  HMAC+SHA256 integrity
 HS384  ...  HMAC+SHA384 integrity
 HS512  ...  HMAC+SHA512 integrity
 RS256  ...  RSA+PKCS1-V1_5 + SHA256 signature
 RS384  ...  RSA+PKCS1-V1_5 + SHA384 signature
 RS512  ...  RSA+PKCS1-V1_5 + SHA512 signature
 PS256  ...  RSA+PSS + SHA256 signature
 PS384  ...  RSA+PSS + SHA384 signature
 PS512  ...  RSA+PSS + SHA512 signature
 ES256  ...  ECDSA + SHA256 signature
 ES256K ...  ECDSA + SHA256 signature
 ES384  ...  ECDSA + SHA384 signature
 ES512  ...  ECDSA + SHA512 signature
 EdDSA  ...  Ed25519 signature
The 'enc' header is mandatory for JWE tokens.

Supported 'enc' algorithms:

 A128GCM
 A192GCM
 A256GCM
 A128CBC-HS256
 A192CBC-HS384
 A256CBC-HS512
A key used for token encryption (JWE) or token signing (JWS). The value depends on "alg" token header value. 

 JWS alg header      key value
 ------------------  ----------------------------------
 none                no key required
 HS256               string (raw octects) of any length (or perl HASH ref with JWK, kty=>'oct')
 HS384               dtto
 HS512               dtto
 RS256               private RSA key, perl HASH ref with JWK key structure,
                     a reference to SCALAR string with PEM or DER or JSON/JWK data,
                     object: Crypt::PK::RSA, Crypt::OpenSSL::RSA, Crypt::X509 or Crypt::OpenSSL::X509
 RS384               private RSA key, see RS256
 RS512               private RSA key, see RS256
 PS256               private RSA key, see RS256
 PS384               private RSA key, see RS256
 PS512               private RSA key, see RS256
 ES256               private ECC key, perl HASH ref with JWK key structure,
                     a reference to SCALAR string with PEM or DER or JSON/JWK data,
                     an instance of Crypt::PK::ECC
 ES256K              private ECC key, see ES256
 ES384               private ECC key, see ES256
 ES512               private ECC key, see ES256
 EdDSA               private Ed25519 key
 JWE alg header      key value
 ------------------  ----------------------------------
 dir                 string (raw octects) or perl HASH ref with JWK, kty=>'oct', length depends on 'enc' algorithm
 A128KW              string (raw octects) 16 bytes (or perl HASH ref with JWK, kty=>'oct')
 A192KW              string (raw octects) 24 bytes (or perl HASH ref with JWK, kty=>'oct')
 A256KW              string (raw octects) 32 bytes (or perl HASH ref with JWK, kty=>'oct')
 A128GCMKW           string (raw octects) 16 bytes (or perl HASH ref with JWK, kty=>'oct')
 A192GCMKW           string (raw octects) 24 bytes (or perl HASH ref with JWK, kty=>'oct')
 A256GCMKW           string (raw octects) 32 bytes (or perl HASH ref with JWK, kty=>'oct')
 PBES2-HS256+A128KW  string (raw octects) of any length (or perl HASH ref with JWK, kty=>'oct')
 PBES2-HS384+A192KW  string (raw octects) of any length (or perl HASH ref with JWK, kty=>'oct')
 PBES2-HS512+A256KW  string (raw octects) of any length (or perl HASH ref with JWK, kty=>'oct')
 RSA-OAEP            public RSA key, perl HASH ref with JWK key structure,
                     a reference to SCALAR string with PEM or DER or JSON/JWK data,
                     an instance of Crypt::PK::RSA or Crypt::OpenSSL::RSA
 RSA-OAEP-256        public RSA key, see RSA-OAEP
 RSA1_5              public RSA key, see RSA-OAEP
 ECDH-ES             public ECC or X25519 key, perl HASH ref with JWK key structure,
                     a reference to SCALAR string with PEM or DER or JSON/JWK data,
                     an instance of Crypt::PK::ECC
 ECDH-ES+A128KW      public ECC or X25519 key, see ECDH-ES
 ECDH-ES+A192KW      public ECC or X25519 key, see ECDH-ES
 ECDH-ES+A256KW      public ECC or X25519 key, see ECDH-ES
When 'key' parameter is an encrypted private RSA or ECC key this optional parameter may contain a password for private key decryption.
1 - allow JWS with "none" 'alg' header value (which means that token has no signature), BEWARE: DANGEROUS, UNSECURE!!!

0 (default) - do not allow JWS with "none" 'alg' header value

This optional parameter may contain a HASH ref with items that will be added to JWT header.

If you want to use PBES2-based 'alg' like "PBES2-HS512+A256KW" you can set PBES2 salt len (p2s) in bytes and iteration count (p2c) via "extra_headers" like this:

 my $token = encode_jwt(payload=>$p, key=>$k, alg=>'PBES2-HS512+A256KW', extra_headers=>{p2c=8000, p2s=>32});
 #NOTE: handling of p2s header is a special case, in the end it is replaced with the generated salt
A hash with additional integrity unprotected headers - JWS and JWE (not available for "compact" serialization);
A hash with additional integrity unprotected headers - JWE only (not available for "compact" serialization);
Additional Authenticated Data - scalar value with any (even raw octects) data - JWE only (not available for "compact" serialization);
Specify serialization method: "compat" (= default) for Compact JWS/JWE serialization or "flattened" for Flattened JWS/JWE JSON serialization.

General JSON serialization is not supported yet.

Compression method, currently 'deflate' is the only one supported. "undef" (default) means no compression. 

 my $token = encode_jwt(payload=>$p, key=>$k, alg=>'HS256', zip=>'deflate');
 #or define compression level
 my $token = encode_jwt(payload=>$p, key=>$k, alg=>'HS256', zip=>['deflate', 9]);
1 - set 'iat' (Issued At) claim to current time (epoch seconds since 1970) at the moment of token encoding

0 (default) - do not set 'iat' claim

NOTE: claims are part of the payload and can be used only if the payload is a HASH ref!

Set 'exp' claim (Expiration Time) to current time + "relative_exp" value (in seconds).

NOTE: claims are part of the payload and can be used only if the payload is a HASH ref!

Set 'nbf' claim (Not Before) to current time + "relative_nbf" value (in seconds).

NOTE: claims are part of the payload and can be used only if the payload is a HASH ref!

Crypt::Cipher::AES, Crypt::AuthEnc::GCM, Crypt::PK::RSA, Crypt::PK::ECC, Crypt::KeyDerivation, Crypt::KeyWrap

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

Copyright (c) 2015-2021 DCIT, a.s. <https://www.dcit.cz> / Karel Miko

2021-12-03 perl v5.32.1