import { JOSENotSupported } from '../util/errors.js';
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function getModulusLengthOption(options) {
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const modulusLength = options?.modulusLength ?? 2048;
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if (typeof modulusLength !== 'number' || modulusLength < 2048) {
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throw new JOSENotSupported('Invalid or unsupported modulusLength option provided, 2048 bits or larger keys must be used');
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}
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return modulusLength;
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}
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export async function generateKeyPair(alg, options) {
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let algorithm;
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let keyUsages;
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switch (alg) {
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case 'PS256':
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case 'PS384':
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case 'PS512':
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algorithm = {
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name: 'RSA-PSS',
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hash: `SHA-${alg.slice(-3)}`,
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publicExponent: Uint8Array.of(0x01, 0x00, 0x01),
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modulusLength: getModulusLengthOption(options),
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};
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keyUsages = ['sign', 'verify'];
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break;
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case 'RS256':
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case 'RS384':
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case 'RS512':
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algorithm = {
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name: 'RSASSA-PKCS1-v1_5',
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hash: `SHA-${alg.slice(-3)}`,
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publicExponent: Uint8Array.of(0x01, 0x00, 0x01),
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modulusLength: getModulusLengthOption(options),
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};
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keyUsages = ['sign', 'verify'];
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break;
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case 'RSA-OAEP':
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case 'RSA-OAEP-256':
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case 'RSA-OAEP-384':
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case 'RSA-OAEP-512':
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algorithm = {
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name: 'RSA-OAEP',
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hash: `SHA-${parseInt(alg.slice(-3), 10) || 1}`,
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publicExponent: Uint8Array.of(0x01, 0x00, 0x01),
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modulusLength: getModulusLengthOption(options),
|
};
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keyUsages = ['decrypt', 'unwrapKey', 'encrypt', 'wrapKey'];
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break;
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case 'ES256':
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algorithm = { name: 'ECDSA', namedCurve: 'P-256' };
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keyUsages = ['sign', 'verify'];
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break;
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case 'ES384':
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algorithm = { name: 'ECDSA', namedCurve: 'P-384' };
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keyUsages = ['sign', 'verify'];
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break;
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case 'ES512':
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algorithm = { name: 'ECDSA', namedCurve: 'P-521' };
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keyUsages = ['sign', 'verify'];
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break;
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case 'Ed25519':
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case 'EdDSA': {
|
keyUsages = ['sign', 'verify'];
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algorithm = { name: 'Ed25519' };
|
break;
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}
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case 'ML-DSA-44':
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case 'ML-DSA-65':
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case 'ML-DSA-87': {
|
keyUsages = ['sign', 'verify'];
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algorithm = { name: alg };
|
break;
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}
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case 'ECDH-ES':
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case 'ECDH-ES+A128KW':
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case 'ECDH-ES+A192KW':
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case 'ECDH-ES+A256KW': {
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keyUsages = ['deriveBits'];
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const crv = options?.crv ?? 'P-256';
|
switch (crv) {
|
case 'P-256':
|
case 'P-384':
|
case 'P-521': {
|
algorithm = { name: 'ECDH', namedCurve: crv };
|
break;
|
}
|
case 'X25519':
|
algorithm = { name: 'X25519' };
|
break;
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default:
|
throw new JOSENotSupported('Invalid or unsupported crv option provided, supported values are P-256, P-384, P-521, and X25519');
|
}
|
break;
|
}
|
default:
|
throw new JOSENotSupported('Invalid or unsupported JWK "alg" (Algorithm) Parameter value');
|
}
|
return crypto.subtle.generateKey(algorithm, options?.extractable ?? false, keyUsages);
|
}
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