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This commit is contained in:
Manav Rathi
2024-08-05 13:57:05 +05:30
parent 13ab0d4309
commit 22b2c49b63
1 changed files with 43 additions and 12 deletions
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55
web/packages/base/crypto/ente.ts
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@@ -76,8 +76,7 @@ export const encryptFileMetadata = async (
metadata: Record<string, unknown>,
keyB64: string,
) => {
const textEncoder = new TextEncoder();
const encodedMetadata = textEncoder.encode(JSON.stringify(metadata));
const encodedMetadata = new TextEncoder().encode(JSON.stringify(metadata));
const { encryptedData, decryptionHeaderB64 } =
await encryptFileAssociatedData(encodedMetadata, keyB64);
@@ -96,10 +95,10 @@ export const encryptFileMetadata = async (
*
* @param encryptedData A {@link Uint8Array} containing the bytes to decrypt.
*
* @param header A Base64 string containing the bytes of the decryption header
* that was produced during encryption.
* @param headerB64 A Base64 string containing the decryption header that was
* produced during encryption.
*
* @param keyB64 Base64 encoded string containing the encryption key. This is
* @param keyB64 A Base64 encoded string containing the encryption key. This is
* expected to be the key of the file with which {@link encryptedDataB64} is
* associated.
*
@@ -112,16 +111,15 @@ export const decryptFileAssociatedData = libsodium.decryptChaChaOneShot2;
*
* This is the sibling of {@link encryptFileEmbedding}.
*
* @param encryptedDataB64 Base64 encoded string containing the encrypted data.
* @param encryptedDataB64 A Base64 string containing the encrypted embedding.
*
* @param headerB64 Base64 encoded string containing the decryption header
* produced during encryption.
* @param headerB64 A Base64 string containing the decryption header produced
* during encryption.
*
* @param keyB64 Base64 encoded string containing the encryption key. This is
* expected to be the key of the file with which {@link encryptedDataB64} is
* associated.
* @param keyB64 A Base64 string containing the encryption key. This is expected
* to be the key of the file with which {@link encryptedDataB64} is associated.
*
* @returns The decrypted metadata bytes.
* @returns The decrypted metadata JSON object.
*/
export const decryptFileEmbedding = async (
encryptedDataB64: string,
@@ -133,3 +131,36 @@ export const decryptFileEmbedding = async (
decryptionHeaderB64,
keyB64,
);
/**
* Decrypt the metadata associated with a file using the file's key.
*
* This is the sibling of {@link decryptFileMetadata}.
*
* @param encryptedDataB64 Base64 encoded string containing the encrypted data.
*
* @param headerB64 Base64 encoded string containing the decryption header
* produced during encryption.
*
* @param keyB64 Base64 encoded string containing the encryption key. This is
* expected to be the key of the file with which {@link encryptedDataB64} is
* associated.
*
* @returns The decrypted JSON value. Since TypeScript does not have a native
* JSON type, we need to return it as an `unknown`.
*/
export const decryptFileMetadata = async (
encryptedDataB64: string,
decryptionHeaderB64: string,
keyB64: string,
) =>
JSON.parse(
new TextDecoder().decode(
await decryptFileAssociatedData(
await libsodium.fromB64(encryptedDataB64),
decryptionHeaderB64,
keyB64,
),
),
) as unknown;