add assert length check to decrypt_int_fast

pass modulus to decrypt_int_fast
myheroyuki · Jan 23, 2025 · fb024d6 · fb024d6
1 parent baabcc7
commit fb024d6
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diff --git a/rsa/core.py b/rsa/core.py
@@ -66,6 +66,7 @@ def decrypt_int_fast(
     rs: typing.List[int],
     ds: typing.List[int],
     ts: typing.List[int],
+    n: int,
 ) -> int:
     """Decrypts a cypher text more quickly using the Chinese Remainder Theorem."""
 
@@ -76,6 +77,8 @@ def decrypt_int_fast(
         assert_int(d, "d")
     for t in ts:
         assert_int(t, "t")
+
+    assert_length(cyphertext, n)
 
     p, q, rs = rs[0], rs[1], rs[2:]
     exp1, exp2, ds = ds[0], ds[1], ds[2:]

diff --git a/rsa/key.py b/rsa/key.py
@@ -551,6 +551,7 @@ def blinded_decrypt(self, encrypted: int) -> int:
             [self.p, self.q] + self.rs,
             [self.exp1, self.exp2] + self.ds,
             [self.coef] + self.ts,
+            self.n,
         )
         return self.unblind(decrypted, blindfac_inverse)