diff options
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/rsa.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/crypto/rsa.c b/crypto/rsa.c index d9be9e86097e..78b28d14ced3 100644 --- a/crypto/rsa.c +++ b/crypto/rsa.c @@ -98,14 +98,13 @@ static int _rsa_dec_crt(const struct rsa_mpi_key *key, MPI m_or_m1_or_h, MPI c) goto err_free_mpi; /* (2iii) h = (m_1 - m_2) * qInv mod p */ - mpi_sub(m12_or_qh, m_or_m1_or_h, m2); - mpi_mulm(m_or_m1_or_h, m12_or_qh, key->qinv, key->p); + ret = mpi_sub(m12_or_qh, m_or_m1_or_h, m2) ?: + mpi_mulm(m_or_m1_or_h, m12_or_qh, key->qinv, key->p); /* (2iv) m = m_2 + q * h */ - mpi_mul(m12_or_qh, key->q, m_or_m1_or_h); - mpi_addm(m_or_m1_or_h, m2, m12_or_qh, key->n); - - ret = 0; + ret = ret ?: + mpi_mul(m12_or_qh, key->q, m_or_m1_or_h) ?: + mpi_addm(m_or_m1_or_h, m2, m12_or_qh, key->n); err_free_mpi: mpi_free(m12_or_qh); @@ -236,6 +235,7 @@ static int rsa_check_key_length(unsigned int len) static int rsa_check_exponent_fips(MPI e) { MPI e_max = NULL; + int err; /* check if odd */ if (!mpi_test_bit(e, 0)) { @@ -250,7 +250,12 @@ static int rsa_check_exponent_fips(MPI e) e_max = mpi_alloc(0); if (!e_max) return -ENOMEM; - mpi_set_bit(e_max, 256); + + err = mpi_set_bit(e_max, 256); + if (err) { + mpi_free(e_max); + return err; + } if (mpi_cmp(e, e_max) >= 0) { mpi_free(e_max); |