Files
tinygo/src/crypto/rand/rand_arc4random.go
T
dkegel-fastly 8135be4e90 GNUmakefile: add spellfix target, use it. (#4387)
TODO: Remove the go.mod/go.sum in internal/tools once doing so doesn't break CI (e.g. once we drop support for go 1.19)

* builder/cc1as.h: fix typo found by 'make spell'
* GNUmakefile: remove exception for inbetween, fix instance now found by 'make spell'
* GNUmakefile: remove exception for programmmer, fix instance now found by 'make spell'
* go.mod: use updated misspell. GNUmakefile: add spellfix target, use it.
* ignore directories properly when invoking spellchecker.
* make spell: give internal/tools its own go.mod, as misspell requires newer go
* make lint: depend on tools and run the installed revive
(which was perhaps implied by the change that added revive to internal/tools,
but not required in GNUmakefile until we gave internal/tools its own temporary go.mod)
* .github: now that 'make spell' works well, run it from CI
* GNUmakefile: make spell now aborts if it finds misspelt words, so what it finds doesn't get lost in CI logs
* GNUmakefile: tools: avoid -C option on go generate to make test-llvm15-go119 circleci job happy, see
https://cs.opensource.google/go/go/+/2af48cbb7d85e5fdc635e75b99f949010c607786
* internal/tools/go.mod: fix format of go version to leave out patchlevel, else go complains.
2024-08-12 14:24:38 -07:00

32 lines
747 B
Go

//go:build darwin || wasip1 || wasip2 || wasm
// This implementation of crypto/rand uses the arc4random_buf function
// (available on both MacOS and WASI) to generate random numbers.
//
// Note: arc4random_buf (unlike what the name suggests) does not use the insecure
// RC4 cipher. Instead, it uses a high-quality cipher, varying by the libc
// implementation.
package rand
import "unsafe"
func init() {
Reader = &reader{}
}
type reader struct {
}
func (r *reader) Read(b []byte) (n int, err error) {
if len(b) != 0 {
libc_arc4random_buf(unsafe.Pointer(&b[0]), uint(len(b)))
}
return len(b), nil
}
// void arc4random_buf(void *buf, size_t buflen);
//
//export arc4random_buf
func libc_arc4random_buf(buf unsafe.Pointer, buflen uint)