diff options
| author | Namjae Jeon <namjae.jeon@samsung.com> | 2021-05-06 11:43:37 +0900 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2021-05-10 19:15:48 -0500 |
| commit | 5a0ca7700591a5275875920cf0c3113435e4b6f7 (patch) | |
| tree | c4edc3d50fed4e77c0d57f83c828413058bdfb1a /fs/cifsd/smb2pdu.c | |
| parent | 1fca8038e9f10bc14eb3484d212b3f03b49ac3f5 (diff) | |
cifsd: add support for AES256 encryption
Now that 256 bit encryption can be negotiated, update
names of the nonces to match the updated official protocol
documentation (e.g. AES_GCM_NONCE instead of AES_128GCM_NONCE)
since they apply to both 128 bit and 256 bit encryption.
update smb encryption code to set 32 byte key length and to
set gcm256/ccm256 when requested on mount.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifsd/smb2pdu.c')
| -rw-r--r-- | fs/cifsd/smb2pdu.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/cifsd/smb2pdu.c b/fs/cifsd/smb2pdu.c index ebae992f88a0..d07d7c45f899 100644 --- a/fs/cifsd/smb2pdu.c +++ b/fs/cifsd/smb2pdu.c @@ -904,7 +904,9 @@ static int decode_encrypt_ctxt(struct ksmbd_conn *conn, for (i = 0; i < cph_cnt; i++) { if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || - pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM) { + pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || + pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || + pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { ksmbd_debug(SMB, "Cipher ID = 0x%x\n", pneg_ctxt->Ciphers[i]); conn->cipher_type = pneg_ctxt->Ciphers[i]; @@ -7979,10 +7981,11 @@ static void fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, char *old_buf, tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); tr_hdr->Flags = cpu_to_le16(0x01); - if (cipher_type == SMB2_ENCRYPTION_AES128_GCM) - get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE); + if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || + cipher_type == SMB2_ENCRYPTION_AES256_GCM) + get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); else - get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE); + get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4); inc_rfc1001_len(tr_hdr, orig_len); |