-module(ywt@sign_key).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/ywt/sign_key.gleam").
-export([hs256/1, hs384/1, hs512/1, with_random_id/1, id/1, match/5, algorithm/1, decoder/0, to_jwk/1]).
-export_type([sign_key/0]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

?MODULEDOC(
    " <style>\n"
    "   .goto-top {\n"
    "     display: block;\n"
    "     font-size: 0.85em;\n"
    "     text-align: right;\n"
    "   }\n"
    " </style>\n"
    " <script>\n"
    " (callback => document.readyState !== 'loading' ? callback() : document.addEventListener('DOMContentLoaded', callback, { once: true }))(() => {\n"
    "   const goToTop = document.createElement('a')\n"
    "   goToTop.classList.add('goto-top')\n"
    "   goToTop.setAttribute('href', '#')\n"
    "   goToTop.textContent = 'Back to top ↑'\n"
    "   for (const member of document.querySelectorAll('.member')) {\n"
    "     member.insertBefore(goToTop.cloneNode(true), null)\n"
    "   }\n"
    " })\n"
    " </script>\n"
).

-opaque sign_key() :: {sign_ecdsa,
        gleam@option:option(binary()),
        ywt@internal@core:named_curve(),
        ywt@internal@core:digest_type(),
        bitstring(),
        bitstring()} |
    {sign_rsa_simple,
        gleam@option:option(binary()),
        ywt@internal@core:digest_type(),
        bigi:big_int(),
        bigi:big_int(),
        bigi:big_int(),
        ywt@internal@core:padding()} |
    {sign_rsa_full,
        gleam@option:option(binary()),
        ywt@internal@core:digest_type(),
        bigi:big_int(),
        bigi:big_int(),
        bigi:big_int(),
        bigi:big_int(),
        bigi:big_int(),
        bigi:big_int(),
        bigi:big_int(),
        bigi:big_int(),
        list({bigi:big_int(), bigi:big_int(), bigi:big_int()}),
        ywt@internal@core:padding()} |
    {sign_hmac,
        gleam@option:option(binary()),
        ywt@internal@core:digest_type(),
        bitstring()}.

-file("src/ywt/sign_key.gleam", 92).
?DOC(
    " Creates a symmetric HMAC-SHA256 signing key for JWT authentication.\n"
    "\n"
    " This is the most commonly used algorithm for simple applications where you have a shared\n"
    " secret between your application and the service that will verify JWTs. The same key is\n"
    " used for both signing and verification.\n"
    "\n"
    " ## Security Considerations\n"
    " - The secret must be cryptographically random and at least 256 bits (32 bytes) long\n"
    " - Keep the secret absolutely confidential - anyone with access can forge tokens\n"
    " - Rotate secrets regularly and have a key rotation strategy\n"
    " - Never store secrets in code or version control\n"
    "\n"
    " ## Example\n"
    " ```gleam\n"
    " import gleam/crypto\n"
    "\n"
    " // Generate a secure random secret\n"
    " let secret = crypto.strong_random_bytes(32)\n"
    " let assert Ok(key) = sign_key.hs256(secret)\n"
    "\n"
    " // Use this key to sign JWTs\n"
    " ywt.encode(payload: [#(\"sub\", json.string(\"user123\"))], claims: [], key: key)\n"
    " ```\n"
    "\n"
    " ⚠️ **Warning:** HMAC keys are symmetric - the same key signs and verifies tokens.\n"
    " This means every service that needs to verify tokens must have the secret,\n"
    " increasing the attack surface.\n"
).
-spec hs256(bitstring()) -> {ok, sign_key()} | {error, nil}.
hs256(Secret) ->
    case erlang:bit_size(Secret) >= 256 of
        true ->
            {ok, {sign_hmac, none, sha256, Secret}};

        false ->
            {error, nil}
    end.

-file("src/ywt/sign_key.gleam", 127).
?DOC(
    " Creates a symmetric HMAC-SHA384 signing key for for JWT authentication.\n"
    "\n"
    " Choose this over HS256 when you need additional security margins or your security\n"
    " policy requires SHA-384.\n"
    "\n"
    " ## Security Considerations\n"
    " - The secret must be cryptographically random and at least 384 bits (48 bytes) long\n"
    " - Keep the secret absolutely confidential - anyone with access can forge tokens\n"
    " - Rotate secrets regularly and have a key rotation strategy\n"
    " - Never store secrets in code or version control\n"
    "\n"
    " ## Example\n"
    " ```gleam\n"
    " import gleam/crypto\n"
    "\n"
    " // Generate a secure random secret\n"
    " let secret = crypto.strong_random_bytes(48)\n"
    " let assert Ok(key) = sign_key.hs384(secret)\n"
    "\n"
    " // Use this key to sign JWTs\n"
    " ywt.encode(payload: [#(\"sub\", json.string(\"user123\"))], claims: [], key: key)\n"
    " ```\n"
    "\n"
    " ⚠️ **Warning:** HMAC keys are symmetric - the same key signs and verifies tokens.\n"
    " This means every service that needs to verify tokens must have the secret,\n"
    " increasing the attack surface.\n"
).
-spec hs384(bitstring()) -> {ok, sign_key()} | {error, nil}.
hs384(Secret) ->
    case erlang:bit_size(Secret) >= 384 of
        true ->
            {ok, {sign_hmac, none, sha384, Secret}};

        false ->
            {error, nil}
    end.

-file("src/ywt/sign_key.gleam", 161).
?DOC(
    " Creates a symmetric HMAC-SHA512 signing key for JWT authentication.\n"
    "\n"
    " This is the most commonly used algorithm for simple applications where you have a shared\n"
    " secret between your application and the service that will verify JWTs. The same key is\n"
    " used for both signing and verification.\n"
    "\n"
    " ## Security Considerations\n"
    " - The secret must be cryptographically random and at least 512 bits (64 bytes) long\n"
    " - Keep the secret absolutely confidential - anyone with access can forge tokens\n"
    " - Rotate secrets regularly and have a key rotation strategy\n"
    " - Never store secrets in code or version control\n"
    "\n"
    " ## Example\n"
    " ```gleam\n"
    " import gleam/crypto\n"
    "\n"
    " // Generate a secure random secret\n"
    " let secret = crypto.strong_random_bytes(64)\n"
    " let assert Ok(key) = sign_key.hs512(secret)\n"
    "\n"
    " // Use this key to sign JWTs\n"
    " ywt.encode(payload: [#(\"sub\", json.string(\"user123\"))], claims: [], key: key)\n"
    " ```\n"
    "\n"
    " ⚠️ **Warning:** HMAC keys are symmetric - the same key signs and verifies tokens.\n"
    " This means every service that needs to verify tokens must have the secret,\n"
    " increasing the attack surface.\n"
).
-spec hs512(bitstring()) -> {ok, sign_key()} | {error, nil}.
hs512(Secret) ->
    case erlang:bit_size(Secret) >= 512 of
        true ->
            {ok, {sign_hmac, none, sha512, Secret}};

        false ->
            {error, nil}
    end.

-file("src/ywt/sign_key.gleam", 178).
?DOC(
    " Assigns a random key identifier to a signing key for key management and rotation.\n"
    "\n"
    " This function generates a cryptographically random identifier and assigns it to\n"
    " the key's `id` field. Key identifiers enable proper key selection during JWT\n"
    " verification and are essential for implementing key rotation strategies.\n"
    "\n"
    " ## Usage\n"
    " Use this when you need to uniquely identify keys for distribution, storage,\n"
    " or rotation purposes. The identifier will be included in JWT headers as the\n"
    " `kid` (Key ID) field, allowing verifiers to select the correct key.\n"
).
-spec with_random_id(sign_key()) -> sign_key().
with_random_id(Key) ->
    Id = {some, ywt_core_ffi:random_id()},
    case Key of
        {sign_ecdsa, _, _, _, _, _} ->
            {sign_ecdsa,
                Id,
                erlang:element(3, Key),
                erlang:element(4, Key),
                erlang:element(5, Key),
                erlang:element(6, Key)};

        {sign_hmac, _, _, _} ->
            {sign_hmac, Id, erlang:element(3, Key), erlang:element(4, Key)};

        {sign_rsa_full, _, _, _, _, _, _, _, _, _, _, _, _} ->
            {sign_rsa_full,
                Id,
                erlang:element(3, Key),
                erlang:element(4, Key),
                erlang:element(5, Key),
                erlang:element(6, Key),
                erlang:element(7, Key),
                erlang:element(8, Key),
                erlang:element(9, Key),
                erlang:element(10, Key),
                erlang:element(11, Key),
                erlang:element(12, Key),
                erlang:element(13, Key)};

        {sign_rsa_simple, _, _, _, _, _, _} ->
            {sign_rsa_simple,
                Id,
                erlang:element(3, Key),
                erlang:element(4, Key),
                erlang:element(5, Key),
                erlang:element(6, Key),
                erlang:element(7, Key)}
    end.

-file("src/ywt/sign_key.gleam", 244).
-spec ec_decoder(gleam@option:option(binary())) -> gleam@dynamic@decode:decoder(sign_key()).
ec_decoder(Id) ->
    gleam@dynamic@decode:field(
        <<"crv"/utf8>>,
        ywt@internal@core:curve_decoder(),
        fun(Crv) ->
            gleam@dynamic@decode:field(
                <<"x"/utf8>>,
                ywt@internal@core:bits_decoder(),
                fun(X) ->
                    gleam@dynamic@decode:field(
                        <<"y"/utf8>>,
                        ywt@internal@core:bits_decoder(),
                        fun(Y) ->
                            gleam@dynamic@decode:field(
                                <<"d"/utf8>>,
                                ywt@internal@core:bits_decoder(),
                                fun(Private_key) ->
                                    Public_key = <<16#4,
                                        X/bitstring,
                                        Y/bitstring>>,
                                    Digest_type = case Crv of
                                        secp256r1 ->
                                            sha256;

                                        secp384r1 ->
                                            sha384;

                                        secp521r1 ->
                                            sha512
                                    end,
                                    gleam@dynamic@decode:success(
                                        {sign_ecdsa,
                                            Id,
                                            Crv,
                                            Digest_type,
                                            Public_key,
                                            Private_key}
                                    )
                                end
                            )
                        end
                    )
                end
            )
        end
    ).

-file("src/ywt/sign_key.gleam", 402).
-spec other_primes_info_decoder() -> gleam@dynamic@decode:decoder({bigi:big_int(),
    bigi:big_int(),
    bigi:big_int()}).
other_primes_info_decoder() ->
    Field_decoder = ywt@internal@core:int_decoder(),
    gleam@dynamic@decode:field(
        <<"r"/utf8>>,
        Field_decoder,
        fun(Factor) ->
            gleam@dynamic@decode:field(
                <<"d"/utf8>>,
                Field_decoder,
                fun(Exponent) ->
                    gleam@dynamic@decode:field(
                        <<"t"/utf8>>,
                        Field_decoder,
                        fun(Coefficient) ->
                            gleam@dynamic@decode:success(
                                {Factor, Exponent, Coefficient}
                            )
                        end
                    )
                end
            )
        end
    ).

-file("src/ywt/sign_key.gleam", 341).
-spec rsa_full_decoder(
    gleam@option:option(binary()),
    ywt@internal@core:digest_type(),
    ywt@internal@core:padding(),
    bigi:big_int(),
    bigi:big_int(),
    bigi:big_int()
) -> gleam@dynamic@decode:decoder(sign_key()).
rsa_full_decoder(
    Id,
    Digest_type,
    Padding,
    Public_exponent,
    Modulus,
    Private_exponent
) ->
    Field_decoder = ywt@internal@core:int_decoder(),
    gleam@dynamic@decode:field(
        <<"p"/utf8>>,
        Field_decoder,
        fun(First_prime_factor) ->
            gleam@dynamic@decode:field(
                <<"q"/utf8>>,
                Field_decoder,
                fun(Second_prime_factor) ->
                    gleam@dynamic@decode:field(
                        <<"dp"/utf8>>,
                        Field_decoder,
                        fun(First_factor_crt_exponent) ->
                            gleam@dynamic@decode:field(
                                <<"dq"/utf8>>,
                                Field_decoder,
                                fun(Second_factor_crt_exponent) ->
                                    gleam@dynamic@decode:field(
                                        <<"qi"/utf8>>,
                                        Field_decoder,
                                        fun(First_crt_coefficient) ->
                                            gleam@dynamic@decode:optional_field(
                                                <<"oth"/utf8>>,
                                                [],
                                                gleam@dynamic@decode:list(
                                                    other_primes_info_decoder()
                                                ),
                                                fun(Other_primes_info) ->
                                                    gleam@dynamic@decode:success(
                                                        {sign_rsa_full,
                                                            Id,
                                                            Digest_type,
                                                            Public_exponent,
                                                            Modulus,
                                                            Private_exponent,
                                                            First_prime_factor,
                                                            Second_prime_factor,
                                                            First_factor_crt_exponent,
                                                            Second_factor_crt_exponent,
                                                            First_crt_coefficient,
                                                            Other_primes_info,
                                                            Padding}
                                                    )
                                                end
                                            )
                                        end
                                    )
                                end
                            )
                        end
                    )
                end
            )
        end
    ).

-file("src/ywt/sign_key.gleam", 424).
?DOC(
    " Extracts the key identifier from a signing key, if present.\n"
    "\n"
    " This function retrieves the optional key identifier that was assigned to a key.\n"
    " Key identifiers are used for key selection during JWT verification.\n"
).
-spec id(sign_key()) -> {ok, binary()} | {error, nil}.
id(Key) ->
    gleam@option:to_result(erlang:element(2, Key), nil).

-file("src/ywt/sign_key.gleam", 431).
?DOC(false).
-spec match(
    sign_key(),
    fun((gleam@option:option(binary()), ywt@internal@core:named_curve(), ywt@internal@core:digest_type(), bitstring(), bitstring()) -> EUY),
    fun((gleam@option:option(binary()), ywt@internal@core:digest_type(), bigi:big_int(), bigi:big_int(), bigi:big_int(), ywt@internal@core:padding()) -> EUY),
    fun((gleam@option:option(binary()), ywt@internal@core:digest_type(), bigi:big_int(), bigi:big_int(), bigi:big_int(), bigi:big_int(), bigi:big_int(), bigi:big_int(), bigi:big_int(), bigi:big_int(), list({bigi:big_int(),
        bigi:big_int(),
        bigi:big_int()}), ywt@internal@core:padding()) -> EUY),
    fun((gleam@option:option(binary()), ywt@internal@core:digest_type(), bitstring()) -> EUY)
) -> EUY.
match(Sign_key, On_ecdsa, On_rsa_simple, On_rsa_full, On_hmac) ->
    case Sign_key of
        {sign_ecdsa, Id, Curve, Digest_type, Public_key, Private_key} ->
            On_ecdsa(Id, Curve, Digest_type, Public_key, Private_key);

        {sign_hmac, Id@1, Digest_type@1, Secret} ->
            On_hmac(Id@1, Digest_type@1, Secret);

        {sign_rsa_full,
            Id@2,
            Digest_type@2,
            Public_exponent,
            Modulus,
            Private_exponent,
            First_prime_factor,
            Second_prime_factor,
            First_factor_crt_exponent,
            Second_factor_crt_exponent,
            First_crt_coefficient,
            Other_primes_info,
            Padding} ->
            On_rsa_full(
                Id@2,
                Digest_type@2,
                Public_exponent,
                Modulus,
                Private_exponent,
                First_prime_factor,
                Second_prime_factor,
                First_factor_crt_exponent,
                Second_factor_crt_exponent,
                First_crt_coefficient,
                Other_primes_info,
                Padding
            );

        {sign_rsa_simple,
            Id@3,
            Digest_type@3,
            Public_exponent@1,
            Modulus@1,
            Private_exponent@1,
            Padding@1} ->
            On_rsa_simple(
                Id@3,
                Digest_type@3,
                Public_exponent@1,
                Modulus@1,
                Private_exponent@1,
                Padding@1
            )
    end.

-file("src/ywt/sign_key.gleam", 484).
?DOC(false).
-spec algorithm(sign_key()) -> ywt@algorithm:algorithm().
algorithm(Key) ->
    case Key of
        {sign_ecdsa, _, _, sha256, _, _} ->
            es256;

        {sign_ecdsa, _, _, sha384, _, _} ->
            es384;

        {sign_ecdsa, _, _, sha512, _, _} ->
            es512;

        {sign_hmac, _, sha256, _} ->
            hs256;

        {sign_hmac, _, sha384, _} ->
            hs384;

        {sign_hmac, _, sha512, _} ->
            hs512;

        {sign_rsa_simple, _, sha256, _, _, _, rsa_pkcs1_padding} ->
            rs256;

        {sign_rsa_full, _, sha256, _, _, _, _, _, _, _, _, _, rsa_pkcs1_padding} ->
            rs256;

        {sign_rsa_simple, _, sha384, _, _, _, rsa_pkcs1_padding} ->
            rs384;

        {sign_rsa_full, _, sha384, _, _, _, _, _, _, _, _, _, rsa_pkcs1_padding} ->
            rs384;

        {sign_rsa_simple, _, sha512, _, _, _, rsa_pkcs1_padding} ->
            rs512;

        {sign_rsa_full, _, sha512, _, _, _, _, _, _, _, _, _, rsa_pkcs1_padding} ->
            rs512;

        {sign_rsa_simple, _, sha256, _, _, _, rsa_pkcs1_pss_padding} ->
            ps256;

        {sign_rsa_full,
            _,
            sha256,
            _,
            _,
            _,
            _,
            _,
            _,
            _,
            _,
            _,
            rsa_pkcs1_pss_padding} ->
            ps256;

        {sign_rsa_simple, _, sha384, _, _, _, rsa_pkcs1_pss_padding} ->
            ps384;

        {sign_rsa_full,
            _,
            sha384,
            _,
            _,
            _,
            _,
            _,
            _,
            _,
            _,
            _,
            rsa_pkcs1_pss_padding} ->
            ps384;

        {sign_rsa_simple, _, sha512, _, _, _, rsa_pkcs1_pss_padding} ->
            ps512;

        {sign_rsa_full,
            _,
            sha512,
            _,
            _,
            _,
            _,
            _,
            _,
            _,
            _,
            _,
            rsa_pkcs1_pss_padding} ->
            ps512
    end.

-file("src/ywt/sign_key.gleam", 235).
-spec oct_decoder(gleam@option:option(binary())) -> gleam@dynamic@decode:decoder(sign_key()).
oct_decoder(Id) ->
    gleam@dynamic@decode:field(
        <<"alg"/utf8>>,
        ywt@algorithm:decoder(),
        fun(Alg) ->
            gleam@dynamic@decode:field(
                <<"k"/utf8>>,
                ywt@internal@core:bits_decoder(),
                fun(K) ->
                    Digest_type = ywt@algorithm:digest_type(Alg),
                    gleam@dynamic@decode:success(
                        {sign_hmac, Id, Digest_type, K}
                    )
                end
            )
        end
    ).

-file("src/ywt/sign_key.gleam", 287).
-spec rsa_decoder(gleam@option:option(binary())) -> gleam@dynamic@decode:decoder(sign_key()).
rsa_decoder(Id) ->
    gleam@dynamic@decode:field(
        <<"alg"/utf8>>,
        ywt@algorithm:decoder(),
        fun(Alg) ->
            Field_decoder = ywt@internal@core:int_decoder(),
            gleam@dynamic@decode:field(
                <<"e"/utf8>>,
                Field_decoder,
                fun(Public_exponent) ->
                    gleam@dynamic@decode:field(
                        <<"n"/utf8>>,
                        Field_decoder,
                        fun(Modulus) ->
                            gleam@dynamic@decode:field(
                                <<"d"/utf8>>,
                                Field_decoder,
                                fun(Private_exponent) ->
                                    Digest_type = ywt@algorithm:digest_type(Alg),
                                    gleam@dynamic@decode:then(
                                        case ywt@algorithm:padding(Alg) of
                                            {ok, Padding} ->
                                                gleam@dynamic@decode:success(
                                                    Padding
                                                );

                                            {error, _} ->
                                                gleam@dynamic@decode:failure(
                                                    rsa_pkcs1_padding,
                                                    <<"alg"/utf8>>
                                                )
                                        end,
                                        fun(Padding@1) ->
                                            Full = rsa_full_decoder(
                                                Id,
                                                Digest_type,
                                                Padding@1,
                                                Public_exponent,
                                                Modulus,
                                                Private_exponent
                                            ),
                                            gleam@dynamic@decode:one_of(
                                                Full,
                                                [gleam@dynamic@decode:success(
                                                        {sign_rsa_simple,
                                                            Id,
                                                            Digest_type,
                                                            Public_exponent,
                                                            Modulus,
                                                            Private_exponent,
                                                            Padding@1}
                                                    )]
                                            )
                                        end
                                    )
                                end
                            )
                        end
                    )
                end
            )
        end
    ).

-file("src/ywt/sign_key.gleam", 221).
?DOC(
    " Decodes a JSON Web Key (JWK) containing a private key into a signing key.\n"
    "\n"
    " Use this for loading private keys from secure configuration or key management systems\n"
    " when implementing JWT signing services.\n"
    "\n"
    " ## Security Considerations\n"
    " - Only accept keys from trusted sources\n"
    " - Store private keys in secure key management systems, never in code\n"
    " - Only keep private keys in your auth service, they should never leave secure boundaries\n"
    " - Rotate private keys regularly and have a key rotation strategy\n"
    "\n"
    " ## Example\n"
    " ```gleam\n"
    " // Load private key from secure configuration (never hardcode!)\n"
    " let private_jwk = load_from_secure_vault(\"jwt-signing-key\")\n"
    "\n"
    " case json.parse(private_jwk, sign_key.decoder()) {\n"
    "   Ok(sign_key) -> {\n"
    "     // Use to create signed JWTs\n"
    "     encode(payload: [#(\"sub\", json.string(\"user123\"))],\n"
    "            claims: [],\n"
    "            key: sign_key)\n"
    "   }\n"
    "   Error(_) -> // Handle key loading error\n"
    " }\n"
    " ```\n"
    "\n"
    " 🔐 **Critical:** Sign keys are the most important pieces of your security.\n"
    " Treat them accordingly.\n"
).
-spec decoder() -> gleam@dynamic@decode:decoder(sign_key()).
decoder() ->
    gleam@dynamic@decode:optional_field(
        <<"kid"/utf8>>,
        none,
        gleam@dynamic@decode:map(
            {decoder, fun gleam@dynamic@decode:decode_string/1},
            fun(Field@0) -> {some, Field@0} end
        ),
        fun(Id) ->
            gleam@dynamic@decode:field(
                <<"kty"/utf8>>,
                {decoder, fun gleam@dynamic@decode:decode_string/1},
                fun(Kty) -> case Kty of
                        <<"oct"/utf8>> ->
                            oct_decoder(Id);

                        <<"EC"/utf8>> ->
                            ec_decoder(Id);

                        <<"RSA"/utf8>> ->
                            rsa_decoder(Id);

                        _ ->
                            gleam@dynamic@decode:failure(
                                {sign_hmac, Id, sha256, <<>>},
                                <<"kty"/utf8>>
                            )
                    end end
            )
        end
    ).

-file("src/ywt/sign_key.gleam", 535).
?DOC(false).
-spec to_jwk(sign_key()) -> gleam@json:json().
to_jwk(Key) ->
    Fields@1 = case Key of
        {sign_hmac, _, _, _} ->
            [{<<"kty"/utf8>>, gleam@json:string(<<"oct"/utf8>>)},
                {<<"k"/utf8>>,
                    ywt@internal@core:bits_to_json(erlang:element(4, Key))}];

        {sign_ecdsa, _, _, _, _, _} ->
            Coord_size = ywt@internal@core:named_curve_size(
                erlang:element(3, Key)
            ),
            {X@1, Y@1} = case erlang:element(5, Key) of
                <<16#4, X:Coord_size/binary, Y:Coord_size/binary>> -> {X, Y};
                _assert_fail ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Pattern match failed, no pattern matched the value."/utf8>>,
                                file => <<?FILEPATH/utf8>>,
                                module => <<"ywt/sign_key"/utf8>>,
                                function => <<"to_jwk"/utf8>>,
                                line => 543,
                                value => _assert_fail,
                                start => 19801,
                                'end' => 19896,
                                pattern_start => 19812,
                                pattern_end => 19871})
            end,
            [{<<"kty"/utf8>>, gleam@json:string(<<"EC"/utf8>>)},
                {<<"crv"/utf8>>,
                    gleam@json:string(
                        ywt@internal@core:named_curve(erlang:element(3, Key))
                    )},
                {<<"x"/utf8>>, ywt@internal@core:bits_to_json(X@1)},
                {<<"y"/utf8>>, ywt@internal@core:bits_to_json(Y@1)},
                {<<"d"/utf8>>,
                    ywt@internal@core:bits_to_json(erlang:element(6, Key))}];

        {sign_rsa_simple, _, _, _, _, _, _} ->
            [{<<"kty"/utf8>>, gleam@json:string(<<"RSA"/utf8>>)},
                {<<"e"/utf8>>,
                    ywt@internal@core:int_to_json(erlang:element(4, Key))},
                {<<"n"/utf8>>,
                    ywt@internal@core:int_to_json(erlang:element(5, Key))},
                {<<"d"/utf8>>,
                    ywt@internal@core:int_to_json(erlang:element(6, Key))}];

        {sign_rsa_full, _, _, _, _, _, _, _, _, _, _, _, _} ->
            Fields = [{<<"kty"/utf8>>, gleam@json:string(<<"RSA"/utf8>>)},
                {<<"e"/utf8>>,
                    ywt@internal@core:int_to_json(erlang:element(4, Key))},
                {<<"n"/utf8>>,
                    ywt@internal@core:int_to_json(erlang:element(5, Key))},
                {<<"d"/utf8>>,
                    ywt@internal@core:int_to_json(erlang:element(6, Key))},
                {<<"p"/utf8>>,
                    ywt@internal@core:int_to_json(erlang:element(7, Key))},
                {<<"q"/utf8>>,
                    ywt@internal@core:int_to_json(erlang:element(8, Key))},
                {<<"dp"/utf8>>,
                    ywt@internal@core:int_to_json(erlang:element(9, Key))},
                {<<"dq"/utf8>>,
                    ywt@internal@core:int_to_json(erlang:element(10, Key))},
                {<<"qi"/utf8>>,
                    ywt@internal@core:int_to_json(erlang:element(11, Key))}],
            case erlang:element(12, Key) of
                [] ->
                    Fields;

                [_ | _] ->
                    [{<<"oth"/utf8>>,
                            gleam@json:array(
                                erlang:element(12, Key),
                                fun(Info) ->
                                    gleam@json:object(
                                        [{<<"r"/utf8>>,
                                                ywt@internal@core:int_to_json(
                                                    erlang:element(1, Info)
                                                )},
                                            {<<"d"/utf8>>,
                                                ywt@internal@core:int_to_json(
                                                    erlang:element(2, Info)
                                                )},
                                            {<<"t"/utf8>>,
                                                ywt@internal@core:int_to_json(
                                                    erlang:element(3, Info)
                                                )}]
                                    )
                                end
                            )} |
                        Fields]
            end
    end,
    Fields@2 = [{<<"alg"/utf8>>, ywt@algorithm:to_json(algorithm(Key))} |
        Fields@1],
    Fields@3 = case erlang:element(2, Key) of
        {some, Id} ->
            [{<<"kid"/utf8>>, gleam@json:string(Id)} | Fields@2];

        none ->
            Fields@2
    end,
    gleam@json:object(Fields@3).