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Текущая директория: /opt/BitGoJS/node_modules/@hashgraph/cryptography/src/primitive

Просмотр файла: aes.browser.js

export const CipherAlgorithm = {
    Aes128Ctr: "AES-128-CTR",
    Aes128Cbc: "AES-128-CBC",
};

/**
 * @param {string} algorithm
 * @param {Uint8Array} key
 * @param {Uint8Array} iv
 * @param {Uint8Array} data
 * @returns {Promise<Uint8Array>}
 */
export async function createCipheriv(algorithm, key, iv, data) {
    let algorithm_;

    switch (algorithm.toUpperCase()) {
        case CipherAlgorithm.Aes128Ctr:
            algorithm_ = {
                name: "AES-CTR",
                counter: iv,
                length: 128,
            };
            break;
        case CipherAlgorithm.Aes128Cbc:
            algorithm_ = {
                name: "AES-CBC",
                iv: iv,
            };
            break;
        default:
            throw new Error(
                "(BUG) non-exhaustive switch statement for CipherAlgorithm"
            );
    }

    const key_ = await window.crypto.subtle.importKey(
        "raw",
        key,
        algorithm_.name,
        false,
        ["encrypt"]
    );

    return new Uint8Array(
        // https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/encrypt#return_value
        /** @type {ArrayBuffer} */ (
            // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
            await window.crypto.subtle.encrypt(algorithm_, key_, data)
        )
    );
}

/**
 * @param {string} algorithm
 * @param {Uint8Array} key
 * @param {Uint8Array} iv
 * @param {Uint8Array} data
 * @returns {Promise<Uint8Array>}
 */
export async function createDecipheriv(algorithm, key, iv, data) {
    let algorithm_;

    switch (algorithm.toUpperCase()) {
        case CipherAlgorithm.Aes128Ctr:
            algorithm_ = {
                name: "AES-CTR",
                counter: iv,
                length: 128,
            };
            break;
        case CipherAlgorithm.Aes128Cbc:
            algorithm_ = {
                name: "AES-CBC",
                iv,
            };
            break;
        default:
            throw new Error(
                "(BUG) non-exhaustive switch statement for CipherAlgorithm"
            );
    }

    const key_ = await window.crypto.subtle.importKey(
        "raw",
        key,
        algorithm_.name,
        false,
        ["decrypt"]
    );

    return new Uint8Array(
        // https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/encrypt#return_value
        /** @type {ArrayBuffer} */ (
            // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
            await window.crypto.subtle.decrypt(algorithm_, key_, data)
        )
    );
}

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