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fix infite recursion on getEncKey (#687)

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Kyle Spearrin 2022-02-17 11:36:00 -05:00 committed by GitHub
parent 1ef2ac1001
commit fc0638a7d9
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 39 additions and 36 deletions
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75
common/src/services/crypto.service.ts
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@ -158,41 +158,8 @@ export class CryptoService implements CryptoServiceAbstraction {
}
@sequentialize(() => "getEncKey")
async getEncKey(key: SymmetricCryptoKey = null): Promise<SymmetricCryptoKey> {
const inMemoryKey = await this.stateService.getDecryptedCryptoSymmetricKey();
if (inMemoryKey != null) {
return inMemoryKey;
}
const encKey = await this.stateService.getEncryptedCryptoSymmetricKey();
if (encKey == null) {
return null;
}
if (key == null) {
key = await this.getKey();
}
if (key == null) {
return null;
}
let decEncKey: ArrayBuffer;
const encKeyCipher = new EncString(encKey);
if (encKeyCipher.encryptionType === EncryptionType.AesCbc256_B64) {
decEncKey = await this.decryptToBytes(encKeyCipher, key);
} else if (encKeyCipher.encryptionType === EncryptionType.AesCbc256_HmacSha256_B64) {
const newKey = await this.stretchKey(key);
decEncKey = await this.decryptToBytes(encKeyCipher, newKey);
} else {
throw new Error("Unsupported encKey type.");
}
if (decEncKey == null) {
return null;
}
const symmetricCryptoKey = new SymmetricCryptoKey(decEncKey);
await this.stateService.setDecryptedCryptoSymmetricKey(symmetricCryptoKey);
return symmetricCryptoKey;
getEncKey(key: SymmetricCryptoKey = null): Promise<SymmetricCryptoKey> {
return this.getEncKeyHelper(key);
}
async getPublicKey(): Promise<ArrayBuffer> {
@ -747,7 +714,7 @@ export class CryptoService implements CryptoServiceAbstraction {
async validateKey(key: SymmetricCryptoKey) {
try {
const encPrivateKey = await this.stateService.getEncryptedPrivateKey();
const encKey = await this.getEncKey(key);
const encKey = await this.getEncKeyHelper(key);
if (encPrivateKey == null || encKey == null) {
return false;
}
@ -967,4 +934,40 @@ export class CryptoService implements CryptoServiceAbstraction {
await this.stateService.setCryptoMasterKeyAuto(null, { userId: userId });
await this.stateService.setCryptoMasterKeyBiometric(null, { userId: userId });
}
private async getEncKeyHelper(key: SymmetricCryptoKey = null): Promise<SymmetricCryptoKey> {
const inMemoryKey = await this.stateService.getDecryptedCryptoSymmetricKey();
if (inMemoryKey != null) {
return inMemoryKey;
}
const encKey = await this.stateService.getEncryptedCryptoSymmetricKey();
if (encKey == null) {
return null;
}
if (key == null) {
key = await this.getKey();
}
if (key == null) {
return null;
}
let decEncKey: ArrayBuffer;
const encKeyCipher = new EncString(encKey);
if (encKeyCipher.encryptionType === EncryptionType.AesCbc256_B64) {
decEncKey = await this.decryptToBytes(encKeyCipher, key);
} else if (encKeyCipher.encryptionType === EncryptionType.AesCbc256_HmacSha256_B64) {
const newKey = await this.stretchKey(key);
decEncKey = await this.decryptToBytes(encKeyCipher, newKey);
} else {
throw new Error("Unsupported encKey type.");
}
if (decEncKey == null) {
return null;
}
const symmetricCryptoKey = new SymmetricCryptoKey(decEncKey);
await this.stateService.setDecryptedCryptoSymmetricKey(symmetricCryptoKey);
return symmetricCryptoKey;
}
}