saymrwulf/curve25519-dalek-source
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Fix two oversized buffer allocations in scalar code.

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Isis Lovecruft 2017-10-30 23:17:46 +00:00
parent aaa2315703
commit 6ed006abc1
Failed to extract signature
1 changed files with 2 additions and 2 deletions
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4
src/scalar_64bit.rs
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@ -50,7 +50,7 @@ impl Scalar64 {
/// Unpack a 32 byte / 256 bit scalar into 5 52-bit limbs. /// Unpack a 32 byte / 256 bit scalar into 5 52-bit limbs.
pub fn from_bytes(bytes: &[u8; 32]) -> Scalar64 { pub fn from_bytes(bytes: &[u8; 32]) -> Scalar64 {
let mut words = [0u64; 8]; let mut words = [0u64; 4];
for i in 0..4 { for i in 0..4 {
for j in 0..8 { for j in 0..8 {
words[i] |= (bytes[(i * 8) + j] as u64) << (j * 8); words[i] |= (bytes[(i * 8) + j] as u64) << (j * 8);
@ -72,7 +72,7 @@ impl Scalar64 {
/// Reduce a 64 byte / 512 bit scalar mod l /// Reduce a 64 byte / 512 bit scalar mod l
pub fn from_bytes_wide(bytes: &[u8; 64]) -> Scalar64 { pub fn from_bytes_wide(bytes: &[u8; 64]) -> Scalar64 {
let mut words = [064; 16]; let mut words = [064; 8];
for i in 0..8 { for i in 0..8 {
for j in 0..8 { for j in 0..8 {
words[i] |= (bytes[(i * 8) + j] as u64) << (j * 8); words[i] |= (bytes[(i * 8) + j] as u64) << (j * 8);