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Experimental: add ComputeEpochID to WASM #570

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Experimental: add ComputeEpochID to WASM #570

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16 changes: 16 additions & 0 deletions rolling-shutter/shcryptowasm/shutter_crypto_wasm.go
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@ func main() {

jsRegistry.Set("encrypt", encrypt)
jsRegistry.Set("decrypt", decrypt)
jsRegistry.Set("computeEpochID", computeEpochID)
jsRegistry.Set("verifyDecryptionKey", verifyDecryptionKey)

// Tell JS we're loaded
Expand Down Expand Up @@ -116,6 +117,21 @@ var verifyDecryptionKey = js.FuncOf(func(this js.Value, args []js.Value) interfa
return ok
})

var computeEpochID = js.FuncOf(func(this js.Value, args []js.Value) interface{} {
if len(args) != 1 {
return encodeResult(nil, fmt.Errorf("expected 1 argument, got %d", len(args)))
}
b, err := decodeBytesArg(args[0], "epochIDBytes")
if err != nil {
return encodeResult(nil, err)
}
e, err := shcrypto.ComputeEpochID(b)
if err != nil {
return encodeResult(nil, err)
}
return encodeResult(e, nil)
}

func encodeResult(encryptedMessage []byte, err error) string {
if err != nil {
return "Error: " + err.Error()
Expand Down