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crypto: fix CipherBase Update int32 overflow #45769

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Merged
nodejs-github-bot merged 2 commits into from
Dec 9, 2022
Merged

crypto: fix CipherBase Update int32 overflow #45769

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f439605
crypto: fix CipherBase Update int32 overflow
marco-ippolito Dec 7, 2022
e9c81a8
Update test/parallel/test-crypto-cipheriv-decipheriv.js
panva Dec 7, 2022
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6 changes: 5 additions & 1 deletion src/crypto/crypto_cipher.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -803,7 +803,11 @@ CipherBase::UpdateResult CipherBase::Update(
if (kind_ == kDecipher && IsAuthenticatedMode())
CHECK(MaybePassAuthTagToOpenSSL());

int buf_len = len + EVP_CIPHER_CTX_block_size(ctx_.get());
const int block_size = EVP_CIPHER_CTX_block_size(ctx_.get());
CHECK_GT(block_size, 0);
if (len + block_size > INT_MAX) return kErrorState;
int buf_len = len + block_size;

// For key wrapping algorithms, get output size by calling
// EVP_CipherUpdate() with null output.
if (kind_ == kCipher && mode == EVP_CIPH_WRAP_MODE &&
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8 changes: 8 additions & 0 deletions test/parallel/test-crypto-cipheriv-decipheriv.js
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Original file line number Diff line number Diff line change
Expand Up @@ -215,3 +215,11 @@ for (let n = minIvLength; n < maxIvLength; n += 1) {
() => crypto.createCipheriv('aes-128-ecb', Buffer.alloc(17), null),
/Invalid key length/);
}

{
// overflowing
assert.throws(() => crypto.createCipheriv('aes-128-gcm', Buffer.alloc(16), Buffer.alloc(12))
.update(Buffer.allocUnsafeSlow(2 ** 31 - 1)), {
name: 'Error',
});
}