Source file src/github.com/tetratelabs/wazero/internal/gojs/crypto.go

Documentation: github.com/tetratelabs/wazero/internal/gojs

     1  package gojs
     2  
     3  import (
     4  	"context"
     5  
     6  	"github.com/tetratelabs/wazero/api"
     7  	"github.com/tetratelabs/wazero/internal/gojs/custom"
     8  	"github.com/tetratelabs/wazero/internal/gojs/goos"
     9  	"github.com/tetratelabs/wazero/internal/wasm"
    10  )
    11  
    12  // jsCrypto is used by crypto/rand.Read to gets random values.
    13  //
    14  // It has only one invocation pattern:
    15  //
    16  //	jsCrypto.Call("getRandomValues", a /* uint8Array */)
    17  //
    18  // This is defined as `Get("crypto")` in rand_js.go init
    19  var jsCrypto = newJsVal(goos.RefJsCrypto, custom.NameCrypto).
    20  	addFunction(custom.NameCryptoGetRandomValues, cryptoGetRandomValues{})
    21  
    22  // cryptoGetRandomValues implements jsFn
    23  type cryptoGetRandomValues struct{}
    24  
    25  func (cryptoGetRandomValues) invoke(_ context.Context, mod api.Module, args ...interface{}) (interface{}, error) {
    26  	randSource := mod.(*wasm.ModuleInstance).Sys.RandSource()
    27  
    28  	r := args[0].(*goos.ByteArray)
    29  	n, err := randSource.Read(r.Unwrap())
    30  	return uint32(n), err
    31  }
    32  

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