dsa: bump crypto-bigint to v0.7.0-rc.28 (#1233)

Updates to use `ConcatenatingMul`

Cargo.lock

@@ -289,9 +289,9 @@ checksum = "460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5"
 
 [[package]]
 name = "crypto-bigint"
-version = "0.7.0-rc.27"
+version = "0.7.0-rc.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b43308b9b6a47554f4612d5b1fb95ff935040aa3927dd42b1d6cbc015a262d96"
+checksum = "96dacf199529fb801ae62a9aafdc01b189e9504c0d1ee1512a4c16bcd8666a93"
 dependencies = [
  "cpubits",
  "ctutils",

dsa/Cargo.toml

@@ -18,7 +18,7 @@ rust-version = "1.85"
 [dependencies]
 der = { version = "0.8", features = ["alloc"] }
 digest = "0.11.0-rc.11"
-crypto-bigint = { version = "0.7.0-rc.27", default-features = false, features = ["alloc", "zeroize"] }
+crypto-bigint = { version = "0.7.0-rc.28", default-features = false, features = ["alloc", "zeroize"] }
 crypto-primes = { version = "0.7.0-pre.9", default-features = false }
 rfc6979 = { version = "0.5.0-rc.5" }
 sha2 = { version = "0.11.0-rc.5", default-features = false }

dsa/src/generate/components.rs

@@ -8,7 +8,7 @@ use crate::{
     two,
 };
 use crypto_bigint::{
-    BoxedUint, NonZero, Odd, RandomBits, Resize,
+    BoxedUint, ConcatenatingMul, NonZero, Odd, RandomBits, Resize,
     modular::{BoxedMontyForm, BoxedMontyParams},
 };
 use crypto_primes::{Flavor, is_prime};
@@ -47,7 +47,7 @@ pub(crate) fn common<R: CryptoRng + ?Sized>(
                     break 'gen_m m;
                 }
             };
-            let rem = NonZero::new((two() * &*q).resize(m.bits_precision()))
+            let rem = NonZero::new(two().concatenating_mul(&*q).resize(m.bits_precision()))
                 .expect("[bug] 2 * NonZero can't be zero");
 
             let mr = &m % &rem;

dsa/src/verifying_key.rs

@@ -5,7 +5,7 @@
 use crate::{Components, Signature, two};
 use core::cmp::min;
 use crypto_bigint::{
-    BoxedUint, NonZero, Resize,
+    BoxedUint, ConcatenatingMul, NonZero, Resize,
     modular::{BoxedMontyForm, BoxedMontyParams},
 };
 use digest::{Update, block_api::EagerHash};
@@ -102,7 +102,7 @@ impl VerifyingKey {
 
         let v1 = g_form.pow(&u1).retrieve();
         let v2 = y_form.pow(&u2).retrieve();
-        let v3 = v1 * v2;
+        let v3 = v1.concatenating_mul(&v2);
         let p = p.resize(v3.bits_precision());
         let q = q.resize(v3.bits_precision());
         let v4 = v3 % p.as_nz_ref();