JWTGenerateKeyPair

Generates an asymmetric key pair appropriate for the given JWS algorithm. Returns a struct with privateKey and publicKey as PEM-encoded strings.

Method Signature

JWTGenerateKeyPair( [algorithm] )

Arguments

Argument	Type	Required	Description	Default
algorithm	string	No	Target algorithm. Determines key type and size.	RS256

Supported Algorithms

Algorithm	Key Type	Key Size
RS256 / RS384	RSA	2048-bit
RS512	RSA	4096-bit
ES256	EC (P-256)	—
ES384	EC (P-384)	—
ES512	EC (P-521)	—

Returns

A struct with:

• privateKey — PEM string

• publicKey — PEM string

Examples

rsaKeys = jwtGenerateKeyPair( "RS256" );
token   = jwtCreate( { sub: "u1" }, rsaKeys.privateKey, "RS256" );
payload = jwtVerify( token, rsaKeys.publicKey, "RS256" );

ecKeys  = jwtGenerateKeyPair( "ES256" );
token   = jwtCreate( { sub: "u1" }, ecKeys.privateKey, "ES256" );
payload = jwtVerify( token, ecKeys.publicKey, "ES256" );

// Persist keys for production
fileWrite( "/etc/keys/private.pem", rsaKeys.privateKey );
fileWrite( "/etc/keys/public.pem",  rsaKeys.publicKey  );

Related

• JWTGenerateSecret() — symmetric HMAC secret

• Key Management Guide

• Algorithms