@transcend-io/encrypt-web-streams/wasm/aes_gcm_stream_wasm.js

WebAssembly-powered streaming AES-256-GCM encryption and decryption with a web-native TransformStream API.

let wasm;

const cachedTextDecoder = (typeof TextDecoder !== 'undefined' ? new TextDecoder('utf-8', { ignoreBOM: true, fatal: true }) : { decode: () => { throw Error('TextDecoder not available') } } );

if (typeof TextDecoder !== 'undefined') { cachedTextDecoder.decode(); };

let cachedUint8ArrayMemory0 = null;

function getUint8ArrayMemory0() {
    if (cachedUint8ArrayMemory0 === null || cachedUint8ArrayMemory0.byteLength === 0) {
        cachedUint8ArrayMemory0 = new Uint8Array(wasm.memory.buffer);
    }
    return cachedUint8ArrayMemory0;
}

function getStringFromWasm0(ptr, len) {
    ptr = ptr >>> 0;
    return cachedTextDecoder.decode(getUint8ArrayMemory0().subarray(ptr, ptr + len));
}

let WASM_VECTOR_LEN = 0;

function passArray8ToWasm0(arg, malloc) {
    const ptr = malloc(arg.length * 1, 1) >>> 0;
    getUint8ArrayMemory0().set(arg, ptr / 1);
    WASM_VECTOR_LEN = arg.length;
    return ptr;
}

function takeFromExternrefTable0(idx) {
    const value = wasm.__wbindgen_export_0.get(idx);
    wasm.__externref_table_dealloc(idx);
    return value;
}

function getArrayU8FromWasm0(ptr, len) {
    ptr = ptr >>> 0;
    return getUint8ArrayMemory0().subarray(ptr / 1, ptr / 1 + len);
}

function isLikeNone(x) {
    return x === undefined || x === null;
}

const DecryptorFinalization = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(ptr => wasm.__wbg_decryptor_free(ptr >>> 0, 1));
/**
 * Streaming AES-256-GCM decryptor.
 */
export class Decryptor {

    __destroy_into_raw() {
        const ptr = this.__wbg_ptr;
        this.__wbg_ptr = 0;
        DecryptorFinalization.unregister(this);
        return ptr;
    }

    free() {
        const ptr = this.__destroy_into_raw();
        wasm.__wbg_decryptor_free(ptr, 0);
    }
    /**
     * @param {Uint8Array} key
     * @param {Uint8Array} iv
     */
    constructor(key, iv) {
        const ptr0 = passArray8ToWasm0(key, wasm.__wbindgen_malloc);
        const len0 = WASM_VECTOR_LEN;
        const ptr1 = passArray8ToWasm0(iv, wasm.__wbindgen_malloc);
        const len1 = WASM_VECTOR_LEN;
        const ret = wasm.decryptor_new(ptr0, len0, ptr1, len1);
        if (ret[2]) {
            throw takeFromExternrefTable0(ret[1]);
        }
        this.__wbg_ptr = ret[0] >>> 0;
        DecryptorFinalization.register(this, this.__wbg_ptr, this);
        return this;
    }
    /**
     * @param {Uint8Array} adata
     */
    init_adata(adata) {
        const ptr0 = passArray8ToWasm0(adata, wasm.__wbindgen_malloc);
        const len0 = WASM_VECTOR_LEN;
        wasm.decryptor_init_adata(this.__wbg_ptr, ptr0, len0);
    }
    /**
     * @param {Uint8Array} chunk
     * @returns {Uint8Array}
     */
    update(chunk) {
        const ptr0 = passArray8ToWasm0(chunk, wasm.__wbindgen_malloc);
        const len0 = WASM_VECTOR_LEN;
        const ret = wasm.decryptor_update(this.__wbg_ptr, ptr0, len0);
        var v2 = getArrayU8FromWasm0(ret[0], ret[1]).slice();
        wasm.__wbindgen_free(ret[0], ret[1] * 1, 1);
        return v2;
    }
    /**
     * Finalize: checks tag and returns any remaining plaintext or errors.
     * @param {boolean | null} [dangerously_ignore_auth_tag]
     * @returns {Uint8Array}
     */
    finalize(dangerously_ignore_auth_tag) {
        const ret = wasm.decryptor_finalize(this.__wbg_ptr, isLikeNone(dangerously_ignore_auth_tag) ? 0xFFFFFF : dangerously_ignore_auth_tag ? 1 : 0);
        if (ret[3]) {
            throw takeFromExternrefTable0(ret[2]);
        }
        var v1 = getArrayU8FromWasm0(ret[0], ret[1]).slice();
        wasm.__wbindgen_free(ret[0], ret[1] * 1, 1);
        return v1;
    }
}

const EncryptorFinalization = (typeof FinalizationRegistry === 'undefined')
    ? { register: () => {}, unregister: () => {} }
    : new FinalizationRegistry(ptr => wasm.__wbg_encryptor_free(ptr >>> 0, 1));
/**
 * Streaming AES-256-GCM encryptor.
 */
export class Encryptor {

    __destroy_into_raw() {
        const ptr = this.__wbg_ptr;
        this.__wbg_ptr = 0;
        EncryptorFinalization.unregister(this);
        return ptr;
    }

    free() {
        const ptr = this.__destroy_into_raw();
        wasm.__wbg_encryptor_free(ptr, 0);
    }
    /**
     * Create with a 32-byte key and iv (recommend 12 bytes).
     * @param {Uint8Array} key
     * @param {Uint8Array} iv
     */
    constructor(key, iv) {
        const ptr0 = passArray8ToWasm0(key, wasm.__wbindgen_malloc);
        const len0 = WASM_VECTOR_LEN;
        const ptr1 = passArray8ToWasm0(iv, wasm.__wbindgen_malloc);
        const len1 = WASM_VECTOR_LEN;
        const ret = wasm.encryptor_new(ptr0, len0, ptr1, len1);
        if (ret[2]) {
            throw takeFromExternrefTable0(ret[1]);
        }
        this.__wbg_ptr = ret[0] >>> 0;
        EncryptorFinalization.register(this, this.__wbg_ptr, this);
        return this;
    }
    /**
     * (Optional) set Additional Authenticated Data.
     * @param {Uint8Array} adata
     */
    init_adata(adata) {
        const ptr0 = passArray8ToWasm0(adata, wasm.__wbindgen_malloc);
        const len0 = WASM_VECTOR_LEN;
        wasm.encryptor_init_adata(this.__wbg_ptr, ptr0, len0);
    }
    /**
     * Encrypt one chunk; returns ciphertext for that chunk.
     * @param {Uint8Array} chunk
     * @returns {Uint8Array}
     */
    update(chunk) {
        const ptr0 = passArray8ToWasm0(chunk, wasm.__wbindgen_malloc);
        const len0 = WASM_VECTOR_LEN;
        const ret = wasm.encryptor_update(this.__wbg_ptr, ptr0, len0);
        var v2 = getArrayU8FromWasm0(ret[0], ret[1]).slice();
        wasm.__wbindgen_free(ret[0], ret[1] * 1, 1);
        return v2;
    }
    /**
     * Finalize: returns `(remaining_ciphertext, tag)`, concatenated.
     * @returns {Uint8Array}
     */
    finalize() {
        const ret = wasm.encryptor_finalize(this.__wbg_ptr);
        var v1 = getArrayU8FromWasm0(ret[0], ret[1]).slice();
        wasm.__wbindgen_free(ret[0], ret[1] * 1, 1);
        return v1;
    }
}

async function __wbg_load(module, imports) {
    if (typeof Response === 'function' && module instanceof Response) {
        if (typeof WebAssembly.instantiateStreaming === 'function') {
            try {
                return await WebAssembly.instantiateStreaming(module, imports);

            } catch (e) {
                if (module.headers.get('Content-Type') != 'application/wasm') {
                    console.warn("`WebAssembly.instantiateStreaming` failed because your server does not serve Wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:\n", e);

                } else {
                    throw e;
                }
            }
        }

        const bytes = await module.arrayBuffer();
        return await WebAssembly.instantiate(bytes, imports);

    } else {
        const instance = await WebAssembly.instantiate(module, imports);

        if (instance instanceof WebAssembly.Instance) {
            return { instance, module };

        } else {
            return instance;
        }
    }
}

function __wbg_get_imports() {
    const imports = {};
    imports.wbg = {};
    imports.wbg.__wbindgen_init_externref_table = function() {
        const table = wasm.__wbindgen_export_0;
        const offset = table.grow(4);
        table.set(0, undefined);
        table.set(offset + 0, undefined);
        table.set(offset + 1, null);
        table.set(offset + 2, true);
        table.set(offset + 3, false);
        ;
    };
    imports.wbg.__wbindgen_string_new = function(arg0, arg1) {
        const ret = getStringFromWasm0(arg0, arg1);
        return ret;
    };
    imports.wbg.__wbindgen_throw = function(arg0, arg1) {
        throw new Error(getStringFromWasm0(arg0, arg1));
    };

    return imports;
}

function __wbg_init_memory(imports, memory) {

}

function __wbg_finalize_init(instance, module) {
    wasm = instance.exports;
    __wbg_init.__wbindgen_wasm_module = module;
    cachedUint8ArrayMemory0 = null;


    wasm.__wbindgen_start();
    return wasm;
}

function initSync(module) {
    if (wasm !== undefined) return wasm;


    if (typeof module !== 'undefined') {
        if (Object.getPrototypeOf(module) === Object.prototype) {
            ({module} = module)
        } else {
            console.warn('using deprecated parameters for `initSync()`; pass a single object instead')
        }
    }

    const imports = __wbg_get_imports();

    __wbg_init_memory(imports);

    if (!(module instanceof WebAssembly.Module)) {
        module = new WebAssembly.Module(module);
    }

    const instance = new WebAssembly.Instance(module, imports);

    return __wbg_finalize_init(instance, module);
}

async function __wbg_init(module_or_path) {
    if (wasm !== undefined) return wasm;


    if (typeof module_or_path !== 'undefined') {
        if (Object.getPrototypeOf(module_or_path) === Object.prototype) {
            ({module_or_path} = module_or_path)
        } else {
            console.warn('using deprecated parameters for the initialization function; pass a single object instead')
        }
    }

    if (typeof module_or_path === 'undefined') {
        module_or_path = new URL('aes_gcm_stream_wasm_bg.wasm', import.meta.url);
    }
    const imports = __wbg_get_imports();

    if (typeof module_or_path === 'string' || (typeof Request === 'function' && module_or_path instanceof Request) || (typeof URL === 'function' && module_or_path instanceof URL)) {
        module_or_path = fetch(module_or_path);
    }

    __wbg_init_memory(imports);

    const { instance, module } = await __wbg_load(await module_or_path, imports);

    return __wbg_finalize_init(instance, module);
}

export { initSync };
export default __wbg_init;