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Fix an overflow in DSA key generation.

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Adam Wick
2019-05-28 21:02:55 -07:00
parent 89c8705779
commit ef3174f224
1 changed files with 1 additions and 1 deletions
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2
src/dsa/mod.rs
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@@ -96,7 +96,7 @@ macro_rules! generate_dsa_pair {
// strength of requested_security_strength or more. If an ERROR // strength of requested_security_strength or more. If an ERROR
// indication is returned, then return an ERROR indication, // indication is returned, then return an ERROR indication,
// Invalid_x, and Invalid_y. // Invalid_x, and Invalid_y.
let returned_bits: Vec<u8> = rng.sample_iter(&Standard).take(n + 8).collect(); let returned_bits: Vec<u8> = rng.sample_iter(&Standard).take( (n + 64) / 8 ).collect();
// 5. Convert returned_bits to the (non-negative) integer c. // 5. Convert returned_bits to the (non-negative) integer c.
let c = $nbig::from_bytes(&returned_bits); let c = $nbig::from_bytes(&returned_bits);
// 6. x = (c mod (q-1)) + 1. // 6. x = (c mod (q-1)) + 1.