projects
/
crypto_lab3.git
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
|
inline
| side by side
Shamir's trick implementation.
[crypto_lab3.git]
/
src
/
RsaCrt.cpp
diff --git
a/src/RsaCrt.cpp
b/src/RsaCrt.cpp
index
ff3f21e
..
869fce5
100644
(file)
--- a/
src/RsaCrt.cpp
+++ b/
src/RsaCrt.cpp
@@
-33,11
+33,24
@@
pair<Rsa::KeyPub, RsaCrt::KeyPriv> RsaCrt::generateRSAKeys(uint exponent, uint k
}
mpz_class RsaCrt::sign(const mpz_class& m, const KeyPriv& kPriv)
}
mpz_class RsaCrt::sign(const mpz_class& m, const KeyPriv& kPriv)
+{
+ return sign(m, kPriv, false);
+}
+
+mpz_class RsaCrt::signWithFaultySp(const mpz_class& m, const KeyPriv& kPriv)
+{
+ return sign(m, kPriv, true);
+}
+
+mpz_class RsaCrt::sign(const mpz_class& m, const KeyPriv& kPriv, bool withError)
{
mpz_class sp, sq;
mpz_powm_sec(sp.get_mpz_t(), m.get_mpz_t(), kPriv.dp.get_mpz_t(), kPriv.p.get_mpz_t());
mpz_powm_sec(sq.get_mpz_t(), m.get_mpz_t(), kPriv.dq.get_mpz_t(), kPriv.q.get_mpz_t());
{
mpz_class sp, sq;
mpz_powm_sec(sp.get_mpz_t(), m.get_mpz_t(), kPriv.dp.get_mpz_t(), kPriv.p.get_mpz_t());
mpz_powm_sec(sq.get_mpz_t(), m.get_mpz_t(), kPriv.dq.get_mpz_t(), kPriv.q.get_mpz_t());
+ if (withError)
+ mpz_combit(sp.get_mpz_t(), 42); // Flip the fourty second bit.
+
return sq + ((kPriv.qInv * (sp - sq)) % kPriv.p) * kPriv.q;
}
return sq + ((kPriv.qInv * (sp - sq)) % kPriv.p) * kPriv.q;
}