diff options
Diffstat (limited to 'src/plugins/ikev2/ikev2_crypto.c')
| -rw-r--r-- | src/plugins/ikev2/ikev2_crypto.c | 47 |
1 files changed, 39 insertions, 8 deletions
diff --git a/src/plugins/ikev2/ikev2_crypto.c b/src/plugins/ikev2/ikev2_crypto.c index 26ff43387e7..572bee8fc65 100644 --- a/src/plugins/ikev2/ikev2_crypto.c +++ b/src/plugins/ikev2/ikev2_crypto.c @@ -458,6 +458,23 @@ ikev2_encrypt_data (ikev2_sa_t * sa, v8 * src, u8 * dst) return out_len + bs; } +#ifndef BN_bn2binpad +int +BN_bn2binpad (const BIGNUM * a, unsigned char *to, int tolen) +{ + int r = BN_bn2bin (a, to); + ASSERT (tolen >= r); + int pad = tolen - r; + if (pad) + { + vec_insert (to, pad, 0); + clib_memset (to, 0, pad); + _vec_len (to) -= pad; + } + return tolen; +} +#endif + void ikev2_generate_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t) { @@ -486,13 +503,13 @@ ikev2_generate_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t) sa->dh_private_key = vec_new (u8, t->key_len); #if OPENSSL_VERSION_NUMBER >= 0x10100000L DH_get0_key (dh, &pub_key, &priv_key); - r = BN_bn2bin (pub_key, sa->i_dh_data); + r = BN_bn2binpad (pub_key, sa->i_dh_data, t->key_len); ASSERT (r == t->key_len); - r = BN_bn2bin (priv_key, sa->dh_private_key); + r = BN_bn2binpad (priv_key, sa->dh_private_key, t->key_len); #else - r = BN_bn2bin (dh->pub_key, sa->i_dh_data); + r = BN_bn2binpad (dh->pub_key, sa->i_dh_data, t->key_len); ASSERT (r == t->key_len); - r = BN_bn2bin (dh->priv_key, sa->dh_private_key); + r = BN_bn2binpad (dh->priv_key, sa->dh_private_key, t->key_len); #endif ASSERT (r == t->key_len); } @@ -501,9 +518,9 @@ ikev2_generate_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t) sa->r_dh_data = vec_new (u8, t->key_len); #if OPENSSL_VERSION_NUMBER >= 0x10100000L DH_get0_key (dh, &pub_key, &priv_key); - r = BN_bn2bin (pub_key, sa->r_dh_data); + r = BN_bn2binpad (pub_key, sa->r_dh_data, t->key_len); #else - r = BN_bn2bin (dh->pub_key, sa->r_dh_data); + r = BN_bn2binpad (dh->pub_key, sa->r_dh_data, t->key_len); #endif ASSERT (r == t->key_len); @@ -511,7 +528,14 @@ ikev2_generate_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t) sa->dh_shared_key = vec_new (u8, t->key_len); ex = BN_bin2bn (sa->i_dh_data, vec_len (sa->i_dh_data), NULL); r = DH_compute_key (sa->dh_shared_key, ex, dh); - ASSERT (r == t->key_len); + ASSERT (t->key_len >= r); + int pad = t->key_len - r; + if (pad) + { + vec_insert (sa->dh_shared_key, pad, 0); + clib_memset (sa->dh_shared_key, 0, pad); + _vec_len (sa->dh_shared_key) -= pad; + } BN_clear_free (ex); } DH_free (dh); @@ -630,7 +654,14 @@ ikev2_complete_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t) sa->dh_shared_key = vec_new (u8, t->key_len); ex = BN_bin2bn (sa->r_dh_data, vec_len (sa->r_dh_data), NULL); r = DH_compute_key (sa->dh_shared_key, ex, dh); - ASSERT (r == t->key_len); + ASSERT (t->key_len >= r); + int pad = t->key_len - r; + if (pad) + { + vec_insert (sa->dh_shared_key, pad, 0); + clib_memset (sa->dh_shared_key, 0, pad); + _vec_len (sa->dh_shared_key) -= pad; + } BN_clear_free (ex); DH_free (dh); } |