function digestHash(algo: string, data: ArrayBuffer | string, encoding?: HexBase64Latin1Encoding) {
let h: Hash
h = createHash(algo.replace("-", ""))
h.update(typeof data === "string" ? data : Buffer.from(data))
if (!encoding) {
return transferInto(h.digest())
}
return h.digest(encoding)
}
_read (size: number = 0) {
let data = randBuffer(2048)
if (this.totalSize - this.readBytes < data.length) {
data = data.slice(0, this.totalSize - this.readBytes)
}
if (data.length > 0) {
this.sha256.update(data)
this.push(data)
this.readBytes += data.length
}
if (this.readBytes >= this.totalSize) {
this.sum = this.sha256.digest('hex')
this.push(null)
}
}