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| var lookup = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 62, 0, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
| 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
| 21, 22, 23, 24, 25, 0, 0, 0, 0, 63, 0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
| 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
| ]
|
| function base64Decode (source, target) {
| var sourceLength = source.length
| var paddingLength = (source[sourceLength - 2] === '=' ? 2 : (source[sourceLength - 1] === '=' ? 1
| : 0))
|
| var tmp
| var byteIndex = 0
| var baseLength = (sourceLength - paddingLength) & 0xfffffffc
|
| for (var i = 0; i < baseLength; i += 4) {
| tmp = (lookup[source.charCodeAt(i)] << 18) |
| (lookup[source.charCodeAt(i + 1)] << 12) |
| (lookup[source.charCodeAt(i + 2)] << 6) |
| (lookup[source.charCodeAt(i + 3)])
|
| target[byteIndex++] = (tmp >> 16) & 0xFF
| target[byteIndex++] = (tmp >> 8) & 0xFF
| target[byteIndex++] = (tmp) & 0xFF
| }
|
| if (paddingLength === 1) {
| tmp = (lookup[source.charCodeAt(i)] << 10) |
| (lookup[source.charCodeAt(i + 1)] << 4) |
| (lookup[source.charCodeAt(i + 2)] >> 2)
|
| target[byteIndex++] = (tmp >> 8) & 0xFF
| target[byteIndex++] = tmp & 0xFF
| }
|
| if (paddingLength === 2) {
| tmp = (lookup[source.charCodeAt(i)] << 2) | (lookup[source.charCodeAt(i + 1)] >> 4)
|
| target[byteIndex++] = tmp & 0xFF
| }
| }
|
| export default {
| getRandomValues (arr) {
| if (!(
| arr instanceof Int8Array ||
| arr instanceof Uint8Array ||
| arr instanceof Int16Array ||
| arr instanceof Uint16Array ||
| arr instanceof Int32Array ||
| arr instanceof Uint32Array ||
| arr instanceof Uint8ClampedArray
| )) {
| throw new Error('Expected an integer array')
| }
| if (arr.byteLength > 65536) {
| throw new Error('Can only request a maximum of 65536 bytes')
| }
| var crypto = uni.requireNativePlugin('DCloud-Crypto')
| base64Decode(crypto.getRandomValues(arr.byteLength), new Uint8Array(arr.buffer, arr.byteOffset,
| arr.byteLength))
| return arr
| }
| }
|
|
