luzifer/wasm-openssl
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Initial test

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Signed-off-by: Knut Ahlers <knut@ahlers.me>
This commit is contained in:
Knut Ahlers 2018-09-17 16:41:02 +02:00
commit d469b667c7
Signed by: luzifer
GPG key ID: DC2729FDD34BE99E
8 changed files with 120 additions and 0 deletions
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.gitignore vendored Normal file
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main.wasm*
wasm_exec.js

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Makefile Normal file
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default: build wasm_exec.js
build:
GOOS=js GOARCH=wasm go build -o main.wasm main.go
gzip -c main.wasm > main.wasm.gz
wasm_exec.js:
curl -sSfLo wasm_exec.js "https://raw.githubusercontent.com/golang/go/go1.11/misc/wasm/wasm_exec.js"

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README.md Normal file
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# go-openssl Wrapper for WASM support
```console
$ make
GOOS=js GOARCH=wasm go build -o main.wasm main.go
gzip -c main.wasm > main.wasm.gz
curl -sSfLo wasm_exec.js "https://raw.githubusercontent.com/golang/go/go1.11/misc/wasm/wasm_exec.js"
$ ls -lh main.wasm*
-rwxr-xr-x 1 luzifer luzifer 2.8M Sep 17 16:43 main.wasm
-rw-r--r-- 1 luzifer luzifer 611K Sep 17 16:43 main.wasm.gz
```
Chrome dev console output:
```
(index):14 (2) ["encryptResponse", "U2FsdGVkX1/baq9kUCX1EmUY/XZfnz7CwqGr70vqo6g="]
(index):10 (2) ["decryptResponse", "Knut"]
```

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go.mod Normal file
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module test
require github.com/Luzifer/go-openssl v2.0.0+incompatible

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go.sum Normal file
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github.com/Luzifer/go-openssl v2.0.0+incompatible h1:EpNNxrPDji4rRzE0KeOeIeV7pHyKe8zF9oNnAXy4mBY=
github.com/Luzifer/go-openssl v2.0.0+incompatible/go.mod h1:t2qnLjT8WQ3usGU1R8uAqjY4T7CK7eMg9vhQ3l9Ue/Y=

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index.html Normal file
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<!doctype html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<script src="wasm_exec.js"></script>
<script src="index.js"></script>
</body>
</html>

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index.js Normal file
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function decryptResponse(plaintext) {
console.log(["decryptResponse", plaintext])
}
function encryptResponse(ciphertext) {
console.log(["encryptResponse", ciphertext])
decrypt(ciphertext, "password", decryptResponse)
}
function wasmStartSuccess() {
encrypt("Knut", "password", encryptResponse)
}
const go = new Go()
WebAssembly.instantiateStreaming(fetch("main.wasm"), go.importObject).then(async obj => await go.run(obj.instance))

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main.go Normal file
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package main
import (
"fmt"
"syscall/js"
openssl "github.com/Luzifer/go-openssl"
)
func main() {
js.Global().Set("decrypt", js.NewCallback(decrypt))
js.Global().Set("encrypt", js.NewCallback(encrypt))
// Trigger custom "event"
js.Global().Call("wasmStartSuccess")
<-make(chan struct{}, 0)
}
func decrypt(i []js.Value) {
if len(i) != 3 {
println("decrypt requires 3 arguments")
return
}
var (
ciphertext = i[0].String()
password = i[1].String()
callback = i[2]
)
o := openssl.New()
plaintext, err := o.DecryptString(password, ciphertext)
if err != nil {
println(fmt.Sprintf("decrypt failed: %s", err))
return
}
callback.Invoke(string(plaintext))
}
func encrypt(i []js.Value) {
if len(i) != 3 {
println("encrypt requires 3 arguments")
return
}
var (
plaintext = i[0].String()
password = i[1].String()
callback = i[2]
)
o := openssl.New()
ciphertext, err := o.EncryptString(password, plaintext)
if err != nil {
println(fmt.Sprintf("encrypt failed: %s", err))
return
}
callback.Invoke(string(ciphertext))
}