Marc Mintel
5397309103
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21 lines
607 B
Plaintext
21 lines
607 B
Plaintext
import { JOSENotSupported } from '../util/errors.js';
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import random from '../runtime/random.js';
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export function bitLength(alg) {
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switch (alg) {
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case 'A128GCM':
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case 'A128GCMKW':
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case 'A192GCM':
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case 'A192GCMKW':
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case 'A256GCM':
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case 'A256GCMKW':
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return 96;
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case 'A128CBC-HS256':
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case 'A192CBC-HS384':
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case 'A256CBC-HS512':
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return 128;
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default:
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throw new JOSENotSupported(`Unsupported JWE Algorithm: ${alg}`);
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}
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}
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export default (alg) => random(new Uint8Array(bitLength(alg) >> 3));
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