We do not support CTS algorithms (cipher text stealing) algorithms.
Signed-off-by: Arne Schwabe <[email protected]>
---
src/openvpn/crypto_openssl.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/src/openvpn/crypto_openssl.c b/src/openvpn/crypto_openssl.c
index ab552efab..ac8287440 100644
--- a/src/openvpn/crypto_openssl.c
+++ b/src/openvpn/crypto_openssl.c
@@ -760,6 +760,9 @@ cipher_kt_mode_cbc(const cipher_kt_t *cipher)
{
return cipher && cipher_kt_mode(cipher) == OPENVPN_MODE_CBC
/* Exclude AEAD cipher modes, they require a different API */
+#ifdef EVP_CIPH_FLAG_CTS
+ && !(EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_CTS)
+#endif
&& !(EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER);
}
--
2.33.0
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