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crypto: improve errors in DiffieHellmanGroup #31445

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crypto: improve errors in DiffieHellmanGroup #31445

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7 changes: 2 additions & 5 deletions src/node_crypto.cc
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Expand Up @@ -5697,18 +5697,15 @@ void DiffieHellman::DiffieHellmanGroup(
Environment* env = Environment::GetCurrent(args);
DiffieHellman* diffieHellman = new DiffieHellman(env, args.This());

if (args.Length() != 1) {
return THROW_ERR_MISSING_ARGS(env, "Group name argument is mandatory");
}

CHECK_EQ(args.Length(), 1);
THROW_AND_RETURN_IF_NOT_STRING(env, args[0], "Group name");

bool initialized = false;

const node::Utf8Value group_name(env->isolate(), args[0]);
const modp_group* group = FindDiffieHellmanGroup(*group_name);
if (group == nullptr)
return env->ThrowError("Unknown group");
return THROW_ERR_CRYPTO_UNKNOWN_DH_GROUP(env, "Unknown group");

initialized = diffieHellman->Init(group->prime,
group->prime_size,
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6 changes: 5 additions & 1 deletion test/parallel/test-crypto-dh.js
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Expand Up @@ -389,7 +389,11 @@ assert.throws(
function() {
crypto.getDiffieHellman('unknown-group');
},
/^Error: Unknown group$/,
{
name: 'Error',
code: 'ERR_CRYPTO_UNKNOWN_DH_GROUP',
message: 'Unknown group'
},
'crypto.getDiffieHellman(\'unknown-group\') ' +
'failed to throw the expected error.'
);
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