29 lines
549 B
Rust
29 lines
549 B
Rust
use libc::{c_uchar, c_int};
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#[link_name = "crypto"]
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#[abi = "cdecl"]
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extern mod libcrypto {
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fn RAND_bytes(buf: *mut u8, num: c_int) -> c_int;
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}
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pub fn rand_bytes(len: uint) -> ~[u8] {
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let mut out = vec::with_capacity(len);
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do vec::as_mut_buf(out) |out_buf, len| {
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let r = libcrypto::RAND_bytes(out_buf, len as c_int);
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if r != 1 as c_int { fail }
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}
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unsafe { vec::raw::set_len(out, len); }
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out
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}
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#[cfg(test)]
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mod tests {
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#[test]
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fn test_rand_bytes() {
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let _bytes = rand_bytes(5u);
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}
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}
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