diff options
author | Namjae Jeon <linkinjeon@kernel.org> | 2021-09-27 21:47:48 +0900 |
---|---|---|
committer | Steve French <stfrench@microsoft.com> | 2021-09-29 16:17:34 -0500 |
commit | ce812992f239f45e13c820a52455fec6eacbce1e (patch) | |
tree | 743f1ea2edbb126c662e7cffacd0e8697dd6f583 /fs/ksmbd | |
parent | 1018bf24550fd0feec14648309a0aeb62401f4dc (diff) | |
download | linux-ce812992f239f45e13c820a52455fec6eacbce1e.tar.bz2 |
ksmbd: remove NTLMv1 authentication
Remove insecure NTLMv1 authentication.
Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Cc: Ralph Böhme <slow@samba.org>
Reviewed-by: Tom Talpey <tom@talpey.com>
Acked-by: Steve French <smfrench@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/ksmbd')
-rw-r--r-- | fs/ksmbd/auth.c | 205 | ||||
-rw-r--r-- | fs/ksmbd/crypto_ctx.c | 16 | ||||
-rw-r--r-- | fs/ksmbd/crypto_ctx.h | 8 |
3 files changed, 0 insertions, 229 deletions
diff --git a/fs/ksmbd/auth.c b/fs/ksmbd/auth.c index de36f12070bf..71c989f1568d 100644 --- a/fs/ksmbd/auth.c +++ b/fs/ksmbd/auth.c @@ -68,125 +68,6 @@ void ksmbd_copy_gss_neg_header(void *buf) memcpy(buf, NEGOTIATE_GSS_HEADER, AUTH_GSS_LENGTH); } -static void -str_to_key(unsigned char *str, unsigned char *key) -{ - int i; - - key[0] = str[0] >> 1; - key[1] = ((str[0] & 0x01) << 6) | (str[1] >> 2); - key[2] = ((str[1] & 0x03) << 5) | (str[2] >> 3); - key[3] = ((str[2] & 0x07) << 4) | (str[3] >> 4); - key[4] = ((str[3] & 0x0F) << 3) | (str[4] >> 5); - key[5] = ((str[4] & 0x1F) << 2) | (str[5] >> 6); - key[6] = ((str[5] & 0x3F) << 1) | (str[6] >> 7); - key[7] = str[6] & 0x7F; - for (i = 0; i < 8; i++) - key[i] = (key[i] << 1); -} - -static int -smbhash(unsigned char *out, const unsigned char *in, unsigned char *key) -{ - unsigned char key2[8]; - struct des_ctx ctx; - - if (fips_enabled) { - ksmbd_debug(AUTH, "FIPS compliance enabled: DES not permitted\n"); - return -ENOENT; - } - - str_to_key(key, key2); - des_expand_key(&ctx, key2, DES_KEY_SIZE); - des_encrypt(&ctx, out, in); - memzero_explicit(&ctx, sizeof(ctx)); - return 0; -} - -static int ksmbd_enc_p24(unsigned char *p21, const unsigned char *c8, unsigned char *p24) -{ - int rc; - - rc = smbhash(p24, c8, p21); - if (rc) - return rc; - rc = smbhash(p24 + 8, c8, p21 + 7); - if (rc) - return rc; - return smbhash(p24 + 16, c8, p21 + 14); -} - -/* produce a md4 message digest from data of length n bytes */ -static int ksmbd_enc_md4(unsigned char *md4_hash, unsigned char *link_str, - int link_len) -{ - int rc; - struct ksmbd_crypto_ctx *ctx; - - ctx = ksmbd_crypto_ctx_find_md4(); - if (!ctx) { - ksmbd_debug(AUTH, "Crypto md4 allocation error\n"); - return -ENOMEM; - } - - rc = crypto_shash_init(CRYPTO_MD4(ctx)); - if (rc) { - ksmbd_debug(AUTH, "Could not init md4 shash\n"); - goto out; - } - - rc = crypto_shash_update(CRYPTO_MD4(ctx), link_str, link_len); - if (rc) { - ksmbd_debug(AUTH, "Could not update with link_str\n"); - goto out; - } - - rc = crypto_shash_final(CRYPTO_MD4(ctx), md4_hash); - if (rc) - ksmbd_debug(AUTH, "Could not generate md4 hash\n"); -out: - ksmbd_release_crypto_ctx(ctx); - return rc; -} - -static int ksmbd_enc_update_sess_key(unsigned char *md5_hash, char *nonce, - char *server_challenge, int len) -{ - int rc; - struct ksmbd_crypto_ctx *ctx; - - ctx = ksmbd_crypto_ctx_find_md5(); - if (!ctx) { - ksmbd_debug(AUTH, "Crypto md5 allocation error\n"); - return -ENOMEM; - } - - rc = crypto_shash_init(CRYPTO_MD5(ctx)); - if (rc) { - ksmbd_debug(AUTH, "Could not init md5 shash\n"); - goto out; - } - - rc = crypto_shash_update(CRYPTO_MD5(ctx), server_challenge, len); - if (rc) { - ksmbd_debug(AUTH, "Could not update with challenge\n"); - goto out; - } - - rc = crypto_shash_update(CRYPTO_MD5(ctx), nonce, len); - if (rc) { - ksmbd_debug(AUTH, "Could not update with nonce\n"); - goto out; - } - - rc = crypto_shash_final(CRYPTO_MD5(ctx), md5_hash); - if (rc) - ksmbd_debug(AUTH, "Could not generate md5 hash\n"); -out: - ksmbd_release_crypto_ctx(ctx); - return rc; -} - /** * ksmbd_gen_sess_key() - function to generate session key * @sess: session of connection @@ -325,43 +206,6 @@ out: } /** - * ksmbd_auth_ntlm() - NTLM authentication handler - * @sess: session of connection - * @pw_buf: NTLM challenge response - * @passkey: user password - * - * Return: 0 on success, error number on error - */ -int ksmbd_auth_ntlm(struct ksmbd_session *sess, char *pw_buf) -{ - int rc; - unsigned char p21[21]; - char key[CIFS_AUTH_RESP_SIZE]; - - memset(p21, '\0', 21); - memcpy(p21, user_passkey(sess->user), CIFS_NTHASH_SIZE); - rc = ksmbd_enc_p24(p21, sess->ntlmssp.cryptkey, key); - if (rc) { - pr_err("password processing failed\n"); - return rc; - } - - ksmbd_enc_md4(sess->sess_key, user_passkey(sess->user), - CIFS_SMB1_SESSKEY_SIZE); - memcpy(sess->sess_key + CIFS_SMB1_SESSKEY_SIZE, key, - CIFS_AUTH_RESP_SIZE); - sess->sequence_number = 1; - - if (strncmp(pw_buf, key, CIFS_AUTH_RESP_SIZE) != 0) { - ksmbd_debug(AUTH, "ntlmv1 authentication failed\n"); - return -EINVAL; - } - - ksmbd_debug(AUTH, "ntlmv1 authentication pass\n"); - return 0; -} - -/** * ksmbd_auth_ntlmv2() - NTLMv2 authentication handler * @sess: session of connection * @ntlmv2: NTLMv2 challenge response @@ -442,44 +286,6 @@ out: } /** - * __ksmbd_auth_ntlmv2() - NTLM2(extended security) authentication handler - * @sess: session of connection - * @client_nonce: client nonce from LM response. - * @ntlm_resp: ntlm response data from client. - * - * Return: 0 on success, error number on error - */ -static int __ksmbd_auth_ntlmv2(struct ksmbd_session *sess, char *client_nonce, - char *ntlm_resp) -{ - char sess_key[CIFS_SMB1_SESSKEY_SIZE] = {0}; - int rc; - unsigned char p21[21]; - char key[CIFS_AUTH_RESP_SIZE]; - - rc = ksmbd_enc_update_sess_key(sess_key, - client_nonce, - (char *)sess->ntlmssp.cryptkey, 8); - if (rc) { - pr_err("password processing failed\n"); - goto out; - } - - memset(p21, '\0', 21); - memcpy(p21, user_passkey(sess->user), CIFS_NTHASH_SIZE); - rc = ksmbd_enc_p24(p21, sess_key, key); - if (rc) { - pr_err("password processing failed\n"); - goto out; - } - - if (memcmp(ntlm_resp, key, CIFS_AUTH_RESP_SIZE) != 0) - rc = -EINVAL; -out: - return rc; -} - -/** * ksmbd_decode_ntlmssp_auth_blob() - helper function to construct * authenticate blob * @authblob: authenticate blob source pointer @@ -512,17 +318,6 @@ int ksmbd_decode_ntlmssp_auth_blob(struct authenticate_message *authblob, nt_off = le32_to_cpu(authblob->NtChallengeResponse.BufferOffset); nt_len = le16_to_cpu(authblob->NtChallengeResponse.Length); - /* process NTLM authentication */ - if (nt_len == CIFS_AUTH_RESP_SIZE) { - if (le32_to_cpu(authblob->NegotiateFlags) & - NTLMSSP_NEGOTIATE_EXTENDED_SEC) - return __ksmbd_auth_ntlmv2(sess, (char *)authblob + - lm_off, (char *)authblob + nt_off); - else - return ksmbd_auth_ntlm(sess, (char *)authblob + - nt_off); - } - /* TODO : use domain name that imported from configuration file */ domain_name = smb_strndup_from_utf16((const char *)authblob + le32_to_cpu(authblob->DomainName.BufferOffset), diff --git a/fs/ksmbd/crypto_ctx.c b/fs/ksmbd/crypto_ctx.c index 5f4b1008d17e..81488d04199d 100644 --- a/fs/ksmbd/crypto_ctx.c +++ b/fs/ksmbd/crypto_ctx.c @@ -81,12 +81,6 @@ static struct shash_desc *alloc_shash_desc(int id) case CRYPTO_SHASH_SHA512: tfm = crypto_alloc_shash("sha512", 0, 0); break; - case CRYPTO_SHASH_MD4: - tfm = crypto_alloc_shash("md4", 0, 0); - break; - case CRYPTO_SHASH_MD5: - tfm = crypto_alloc_shash("md5", 0, 0); - break; default: return NULL; } @@ -214,16 +208,6 @@ struct ksmbd_crypto_ctx *ksmbd_crypto_ctx_find_sha512(void) return ____crypto_shash_ctx_find(CRYPTO_SHASH_SHA512); } -struct ksmbd_crypto_ctx *ksmbd_crypto_ctx_find_md4(void) -{ - return ____crypto_shash_ctx_find(CRYPTO_SHASH_MD4); -} - -struct ksmbd_crypto_ctx *ksmbd_crypto_ctx_find_md5(void) -{ - return ____crypto_shash_ctx_find(CRYPTO_SHASH_MD5); -} - static struct ksmbd_crypto_ctx *____crypto_aead_ctx_find(int id) { struct ksmbd_crypto_ctx *ctx; diff --git a/fs/ksmbd/crypto_ctx.h b/fs/ksmbd/crypto_ctx.h index ef11154b43df..4a367c62f653 100644 --- a/fs/ksmbd/crypto_ctx.h +++ b/fs/ksmbd/crypto_ctx.h @@ -15,8 +15,6 @@ enum { CRYPTO_SHASH_CMACAES, CRYPTO_SHASH_SHA256, CRYPTO_SHASH_SHA512, - CRYPTO_SHASH_MD4, - CRYPTO_SHASH_MD5, CRYPTO_SHASH_MAX, }; @@ -43,8 +41,6 @@ struct ksmbd_crypto_ctx { #define CRYPTO_CMACAES(c) ((c)->desc[CRYPTO_SHASH_CMACAES]) #define CRYPTO_SHA256(c) ((c)->desc[CRYPTO_SHASH_SHA256]) #define CRYPTO_SHA512(c) ((c)->desc[CRYPTO_SHASH_SHA512]) -#define CRYPTO_MD4(c) ((c)->desc[CRYPTO_SHASH_MD4]) -#define CRYPTO_MD5(c) ((c)->desc[CRYPTO_SHASH_MD5]) #define CRYPTO_HMACMD5_TFM(c) ((c)->desc[CRYPTO_SHASH_HMACMD5]->tfm) #define CRYPTO_HMACSHA256_TFM(c)\ @@ -52,8 +48,6 @@ struct ksmbd_crypto_ctx { #define CRYPTO_CMACAES_TFM(c) ((c)->desc[CRYPTO_SHASH_CMACAES]->tfm) #define CRYPTO_SHA256_TFM(c) ((c)->desc[CRYPTO_SHASH_SHA256]->tfm) #define CRYPTO_SHA512_TFM(c) ((c)->desc[CRYPTO_SHASH_SHA512]->tfm) -#define CRYPTO_MD4_TFM(c) ((c)->desc[CRYPTO_SHASH_MD4]->tfm) -#define CRYPTO_MD5_TFM(c) ((c)->desc[CRYPTO_SHASH_MD5]->tfm) #define CRYPTO_GCM(c) ((c)->ccmaes[CRYPTO_AEAD_AES_GCM]) #define CRYPTO_CCM(c) ((c)->ccmaes[CRYPTO_AEAD_AES_CCM]) @@ -64,8 +58,6 @@ struct ksmbd_crypto_ctx *ksmbd_crypto_ctx_find_hmacsha256(void); struct ksmbd_crypto_ctx *ksmbd_crypto_ctx_find_cmacaes(void); struct ksmbd_crypto_ctx *ksmbd_crypto_ctx_find_sha512(void); struct ksmbd_crypto_ctx *ksmbd_crypto_ctx_find_sha256(void); -struct ksmbd_crypto_ctx *ksmbd_crypto_ctx_find_md4(void); -struct ksmbd_crypto_ctx *ksmbd_crypto_ctx_find_md5(void); struct ksmbd_crypto_ctx *ksmbd_crypto_ctx_find_gcm(void); struct ksmbd_crypto_ctx *ksmbd_crypto_ctx_find_ccm(void); void ksmbd_crypto_destroy(void); |