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hono/deno_dist/utils/crypto.ts

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type Algorithm = {
name: string
alias: string
}
type Data = string | boolean | number | object | ArrayBufferView | ArrayBuffer | ReadableStream
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export const sha256 = async (data: Data) => {
const algorithm: Algorithm = { name: 'SHA-256', alias: 'sha256' }
const hash = await createHash(data, algorithm)
return hash
}
export const sha1 = async (data: Data) => {
const algorithm: Algorithm = { name: 'SHA-1', alias: 'sha1' }
const hash = await createHash(data, algorithm)
return hash
}
export const md5 = async (data: Data) => {
const algorithm: Algorithm = { name: 'MD5', alias: 'md5' }
const hash = await createHash(data, algorithm)
return hash
}
export const createHash = async (data: Data, algorithm: Algorithm): Promise<string | null> => {
let sourceBuffer: ArrayBufferView | ArrayBuffer
if (data instanceof ReadableStream) {
let body = ''
const reader = data.getReader()
await reader?.read().then(async (chuck) => {
const value = await createHash(chuck.value || '', algorithm)
body += value
})
return body
}
if (ArrayBuffer.isView(data) || data instanceof ArrayBuffer) {
sourceBuffer = data
} else {
if (typeof data === 'object') {
data = JSON.stringify(data)
}
sourceBuffer = new TextEncoder().encode(String(data))
}
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if (crypto && crypto.subtle) {
const buffer = await crypto.subtle.digest(
{
name: algorithm.name,
},
sourceBuffer
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)
const hash = Array.prototype.map
.call(new Uint8Array(buffer), (x) => ('00' + x.toString(16)).slice(-2))
.join('')
return hash
}
return null
}