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test: test privateEncrypt/publicDecrypt + padding #27188

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test: test privateEncrypt/publicDecrypt + padding #27188

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test: test privateEncrypt/publicDecrypt + padding 
Verify that RSA_NO_PADDING and RSA_PKCS1_PADDING work as advertised.
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@bnoordhuis
bnoordhuis committed Apr 11, 2019
commit 3980d0547909eac93d1f92c10d169931f7b8c125
36 changes: 36 additions & 0 deletions test/parallel/test-crypto-rsa-dsa.js
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Original file line number Diff line number Diff line change
Expand Up @@ -74,6 +74,42 @@ const decryptError = {
}, encryptedBuffer);
assert.strictEqual(decryptedBufferWithPassword.toString(), input);

// Now with explicit RSA_PKCS1_PADDING.
encryptedBuffer = crypto.privateEncrypt({
padding: crypto.constants.RSA_PKCS1_PADDING,
key: rsaKeyPemEncrypted,
passphrase: Buffer.from('password')
}, bufferToEncrypt);

decryptedBufferWithPassword = crypto.publicDecrypt({
padding: crypto.constants.RSA_PKCS1_PADDING,
key: rsaKeyPemEncrypted,
passphrase: Buffer.from('password')
}, encryptedBuffer);
assert.strictEqual(decryptedBufferWithPassword.toString(), input);

// Omitting padding should be okay because RSA_PKCS1_PADDING is the default.
decryptedBufferWithPassword = crypto.publicDecrypt({
key: rsaKeyPemEncrypted,
passphrase: Buffer.from('password')
}, encryptedBuffer);
assert.strictEqual(decryptedBufferWithPassword.toString(), input);

// Now with RSA_NO_PADDING. Plaintext needs to match key size.
const plaintext = 'x'.repeat(128);
encryptedBuffer = crypto.privateEncrypt({
padding: crypto.constants.RSA_NO_PADDING,
key: rsaKeyPemEncrypted,
passphrase: Buffer.from('password')
}, Buffer.from(plaintext));

decryptedBufferWithPassword = crypto.publicDecrypt({
padding: crypto.constants.RSA_NO_PADDING,
key: rsaKeyPemEncrypted,
passphrase: Buffer.from('password')
}, encryptedBuffer);
assert.strictEqual(decryptedBufferWithPassword.toString(), plaintext);

encryptedBuffer = crypto.publicEncrypt(certPem, bufferToEncrypt);

decryptedBuffer = crypto.privateDecrypt(keyPem, encryptedBuffer);
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