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const {
ObjectKeys,
StringPrototypeToLowerCase,
} = primordials;
const kHashContextNode = 1;
const kHashContextWebCrypto = 2;
const kHashContextJwkRsa = 3;
const kHashContextJwkRsaPss = 4;
const kHashContextJwkRsaOaep = 5;
const kHashContextJwkHmac = 6;
const kHashContextJwkDsa = 7;
// WebCrypto and JWK use a bunch of different names for the
// standard set of SHA-* digest algorithms... which is ... fun.
// Here we provide a utility for mapping between them in order
// make it easier in the code.
const kHashNames = {
sha1: {
[kHashContextNode]: 'sha1',
[kHashContextWebCrypto]: 'SHA-1',
[kHashContextJwkRsa]: 'RS1',
[kHashContextJwkRsaPss]: 'PS1',
[kHashContextJwkRsaOaep]: 'RSA-OAEP',
[kHashContextJwkHmac]: 'HS1',
[kHashContextJwkDsa]: 'NODE-DSA-SHA-1',
},
sha256: {
[kHashContextNode]: 'sha256',
[kHashContextWebCrypto]: 'SHA-256',
[kHashContextJwkRsa]: 'RS256',
[kHashContextJwkRsaPss]: 'PS256',
[kHashContextJwkRsaOaep]: 'RSA-OAEP-256',
[kHashContextJwkHmac]: 'HS256',
[kHashContextJwkDsa]: 'NODE-DSA-SHA-256',
},
sha384: {
[kHashContextNode]: 'sha384',
[kHashContextWebCrypto]: 'SHA-384',
[kHashContextJwkRsa]: 'RS384',
[kHashContextJwkRsaPss]: 'PS384',
[kHashContextJwkRsaOaep]: 'RSA-OAEP-384',
[kHashContextJwkHmac]: 'HS384',
[kHashContextJwkDsa]: 'NODE-DSA-SHA-384',
},
sha512: {
[kHashContextNode]: 'sha512',
[kHashContextWebCrypto]: 'SHA-512',
[kHashContextJwkRsa]: 'RS512',
[kHashContextJwkRsaPss]: 'PS512',
[kHashContextJwkRsaOaep]: 'RSA-OAEP-512',
[kHashContextJwkHmac]: 'HS512',
[kHashContextJwkDsa]: 'NODE-DSA-SHA-512',
}
};
{
// Index the aliases
const keys = ObjectKeys(kHashNames);
for (let n = 0; n < keys.length; n++) {
const contexts = ObjectKeys(kHashNames[keys[n]]);
for (let i = 0; i < contexts.length; i++) {
const alias =
StringPrototypeToLowerCase(kHashNames[keys[n]][contexts[i]]);
if (kHashNames[alias] === undefined)
kHashNames[alias] = kHashNames[keys[n]];
}
}
}
function normalizeHashName(name, context = kHashContextNode) {
if (typeof name !== 'string')
return name;
name = StringPrototypeToLowerCase(name);
const alias = kHashNames[name] && kHashNames[name][context];
return alias || name;
}
normalizeHashName.kContextNode = kHashContextNode;
normalizeHashName.kContextWebCrypto = kHashContextWebCrypto;
normalizeHashName.kContextJwkRsa = kHashContextJwkRsa;
normalizeHashName.kContextJwkRsaPss = kHashContextJwkRsaPss;
normalizeHashName.kContextJwkRsaOaep = kHashContextJwkRsaOaep;
normalizeHashName.kContextJwkHmac = kHashContextJwkHmac;
normalizeHashName.kContextJwkDsa = kHashContextJwkDsa;
module.exports = normalizeHashName;
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