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rust-secp256k1
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Do validation in pubkey::from_slice

This commit is contained in:
Andrew Poelstra 2014-08-31 16:04:14 -05:00
parent a0ecfe9e29
commit 059c72aa60
2 changed files with 9 additions and 2 deletions
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3
src/ffi.rs
View File

@ -48,6 +48,9 @@ extern "C" {
pub fn secp256k1_ecdsa_seckey_verify(sk: *const c_uchar) -> c_int;
pub fn secp256k1_ecdsa_pubkey_verify(pk: *const c_uchar,
pk_len: c_int) -> c_int;
pub fn secp256k1_ecdsa_privkey_tweak_add(sk: *mut c_uchar,
tweak: *const c_uchar)
-> c_int;

8
src/key.rs
View File

@ -159,6 +159,10 @@ impl PublicKey {
constants::COMPRESSED_PUBLIC_KEY_SIZE => {
let mut ret = [0, ..constants::COMPRESSED_PUBLIC_KEY_SIZE];
unsafe {
if ffi::secp256k1_ecdsa_pubkey_verify(data.as_ptr(),
data.len() as ::libc::c_int) == 0 {
return Err(InvalidPublicKey);
}
copy_nonoverlapping_memory(ret.as_mut_ptr(),
data.as_ptr(),
data.len());
@ -315,11 +319,11 @@ mod test {
assert_eq!(PublicKey::from_slice([]), Err(InvalidPublicKey));
assert_eq!(PublicKey::from_slice([1, 2, 3]), Err(InvalidPublicKey));
let uncompressed = PublicKey::from_slice([1, ..65]);
let uncompressed = PublicKey::from_slice([4, 54, 57, 149, 239, 162, 148, 175, 246, 254, 239, 75, 154, 152, 10, 82, 234, 224, 85, 220, 40, 100, 57, 121, 30, 162, 94, 156, 135, 67, 74, 49, 179, 57, 236, 53, 162, 124, 149, 144, 168, 77, 74, 30, 72, 211, 229, 110, 111, 55, 96, 193, 86, 227, 183, 152, 195, 155, 51, 247, 123, 113, 60, 228, 188]);
assert!(uncompressed.is_ok());
assert!(!uncompressed.unwrap().is_compressed());
let compressed = PublicKey::from_slice([1, ..33]);
let compressed = PublicKey::from_slice([3, 23, 183, 225, 206, 31, 159, 148, 195, 42, 67, 115, 146, 41, 248, 140, 11, 3, 51, 41, 111, 180, 110, 143, 114, 134, 88, 73, 198, 174, 52, 184, 78]);
assert!(compressed.is_ok());
assert!(compressed.unwrap().is_compressed());
}