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