869e917dc6
This uses Mingw-w64, which seems to be the de facto standard for porting Unixy programs to Windows.
42 строки
883 Б
Go
42 строки
883 Б
Go
package rand
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import "errors"
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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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var errRandom = errors.New("failed to obtain random data from rand_s")
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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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return
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}
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var randomByte uint32
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for i := range b {
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// Call rand_s every four bytes because it's a C int (always 32-bit in
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// Windows).
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if i%4 == 0 {
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errCode := libc_rand_s(&randomByte)
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if errCode != 0 {
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// According to the documentation, it can return an error.
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return n, errRandom
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}
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} else {
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randomByte >>= 8
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}
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b[i] = byte(randomByte)
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}
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return len(b), nil
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}
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// Cryptographically secure random number generator.
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// https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/rand-s?view=msvc-170
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// errno_t rand_s(unsigned int* randomValue);
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//export rand_s
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func libc_rand_s(randomValue *uint32) int32
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