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authorGerald (Jerry) Carter <jerry@samba.org>2007-10-10 15:34:30 -0500
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 15:34:30 -0500
commite5a951325a6cac8567af3a66de6d2df577508ae4 (patch)
tree34da9fe59f3c2d7f8edb072144443a9704197831 /source3/libsmb/smb_seal.c
parent57482469b32645250e92a7ffd003aeeb4a42235e (diff)
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[GLUE] Rsync SAMBA_3_2_0 SVN r25598 in order to create the v3-2-test branch.
(This used to be commit 5c6c8e1fe93f340005110a7833946191659d88ab)
Diffstat (limited to 'source3/libsmb/smb_seal.c')
-rw-r--r--source3/libsmb/smb_seal.c496
1 files changed, 0 insertions, 496 deletions
diff --git a/source3/libsmb/smb_seal.c b/source3/libsmb/smb_seal.c
deleted file mode 100644
index 33352b85ce..0000000000
--- a/source3/libsmb/smb_seal.c
+++ /dev/null
@@ -1,496 +0,0 @@
-/*
- Unix SMB/CIFS implementation.
- SMB Transport encryption (sealing) code.
- Copyright (C) Jeremy Allison 2007.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-
-/******************************************************************************
- Pull out the encryption context for this packet. 0 means global context.
-******************************************************************************/
-
-NTSTATUS get_enc_ctx_num(char *buf, uint16 *p_enc_ctx_num)
-{
- if (smb_len(buf) < 8) {
- return NT_STATUS_INVALID_BUFFER_SIZE;
- }
-
- if (buf[4] == (char)0xFF) {
- if (buf[5] == 'S' && buf [6] == 'M' && buf[7] == 'B') {
- /* Not an encrypted buffer. */
- return NT_STATUS_NOT_FOUND;
- }
- if (buf[5] == 'E') {
- *p_enc_ctx_num = SVAL(buf,6);
- return NT_STATUS_OK;
- }
- }
- return NT_STATUS_INVALID_NETWORK_RESPONSE;
-}
-
-/******************************************************************************
- Generic code for client and server.
- Is encryption turned on ?
-******************************************************************************/
-
-BOOL common_encryption_on(struct smb_trans_enc_state *es)
-{
- return ((es != NULL) && es->enc_on);
-}
-
-/******************************************************************************
- Generic code for client and server.
- NTLM decrypt an incoming buffer.
- Abartlett tells me that SSPI puts the signature first before the encrypted
- output, so cope with the same for compatibility.
-******************************************************************************/
-
-NTSTATUS common_ntlm_decrypt_buffer(NTLMSSP_STATE *ntlmssp_state, char *buf)
-{
- NTSTATUS status;
- size_t buf_len = smb_len(buf) + 4; /* Don't forget the 4 length bytes. */
- size_t data_len;
- char *inbuf;
- DATA_BLOB sig;
-
- if (buf_len < 8 + NTLMSSP_SIG_SIZE) {
- return NT_STATUS_BUFFER_TOO_SMALL;
- }
-
- inbuf = (char *)smb_xmemdup(buf, buf_len);
-
- /* Adjust for the signature. */
- data_len = buf_len - 8 - NTLMSSP_SIG_SIZE;
-
- /* Point at the signature. */
- sig = data_blob_const(inbuf+8, NTLMSSP_SIG_SIZE);
-
- status = ntlmssp_unseal_packet(ntlmssp_state,
- (unsigned char *)inbuf + 8 + NTLMSSP_SIG_SIZE, /* 4 byte len + 0xFF 'E' <enc> <ctx> */
- data_len,
- (unsigned char *)inbuf + 8 + NTLMSSP_SIG_SIZE,
- data_len,
- &sig);
-
- if (!NT_STATUS_IS_OK(status)) {
- SAFE_FREE(inbuf);
- return status;
- }
-
- memcpy(buf + 8, inbuf + 8 + NTLMSSP_SIG_SIZE, data_len);
-
- /* Reset the length. */
- smb_setlen(inbuf, buf, data_len + 4);
-
- SAFE_FREE(inbuf);
- return NT_STATUS_OK;
-}
-
-/******************************************************************************
- Generic code for client and server.
- NTLM encrypt an outgoing buffer. Return the encrypted pointer in ppbuf_out.
- Abartlett tells me that SSPI puts the signature first before the encrypted
- output, so do the same for compatibility.
-******************************************************************************/
-
-NTSTATUS common_ntlm_encrypt_buffer(NTLMSSP_STATE *ntlmssp_state,
- uint16 enc_ctx_num,
- char *buf,
- char **ppbuf_out)
-{
- NTSTATUS status;
- char *buf_out;
- size_t data_len = smb_len(buf) - 4; /* Ignore the 0xFF SMB bytes. */
- DATA_BLOB sig;
-
- *ppbuf_out = NULL;
-
- if (data_len == 0) {
- return NT_STATUS_BUFFER_TOO_SMALL;
- }
-
- /*
- * We know smb_len can't return a value > 128k, so no int overflow
- * check needed.
- */
-
- buf_out = SMB_XMALLOC_ARRAY(char, 8 + NTLMSSP_SIG_SIZE + data_len);
-
- /* Copy the data from the original buffer. */
-
- memcpy(buf_out + 8 + NTLMSSP_SIG_SIZE, buf + 8, data_len);
-
- smb_set_enclen(buf_out, smb_len(buf) + NTLMSSP_SIG_SIZE, enc_ctx_num);
-
- sig = data_blob(NULL, NTLMSSP_SIG_SIZE);
-
- status = ntlmssp_seal_packet(ntlmssp_state,
- (unsigned char *)buf_out + 8 + NTLMSSP_SIG_SIZE, /* 4 byte len + 0xFF 'S' <enc> <ctx> */
- data_len,
- (unsigned char *)buf_out + 8 + NTLMSSP_SIG_SIZE,
- data_len,
- &sig);
-
- if (!NT_STATUS_IS_OK(status)) {
- data_blob_free(&sig);
- SAFE_FREE(buf_out);
- return status;
- }
-
- /* First 16 data bytes are signature for SSPI compatibility. */
- memcpy(buf_out + 8, sig.data, NTLMSSP_SIG_SIZE);
- *ppbuf_out = buf_out;
- return NT_STATUS_OK;
-}
-
-/******************************************************************************
- Generic code for client and server.
- gss-api decrypt an incoming buffer. We insist that the size of the
- unwrapped buffer must be smaller or identical to the incoming buffer.
-******************************************************************************/
-
-#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
-static NTSTATUS common_gss_decrypt_buffer(struct smb_tran_enc_state_gss *gss_state, char *buf)
-{
- gss_ctx_id_t gss_ctx = gss_state->gss_ctx;
- OM_uint32 ret = 0;
- OM_uint32 minor = 0;
- int flags_got = 0;
- gss_buffer_desc in_buf, out_buf;
- size_t buf_len = smb_len(buf) + 4; /* Don't forget the 4 length bytes. */
-
- if (buf_len < 8) {
- return NT_STATUS_BUFFER_TOO_SMALL;
- }
-
- in_buf.value = buf + 8;
- in_buf.length = buf_len - 8;
-
- ret = gss_unwrap(&minor,
- gss_ctx,
- &in_buf,
- &out_buf,
- &flags_got, /* did we get sign+seal ? */
- (gss_qop_t *) NULL);
-
- if (ret != GSS_S_COMPLETE) {
- ADS_STATUS adss = ADS_ERROR_GSS(ret, minor);
- DEBUG(0,("common_gss_encrypt_buffer: gss_unwrap failed. Error %s\n",
- ads_errstr(adss) ));
- return map_nt_error_from_gss(ret, minor);
- }
-
- if (out_buf.length > in_buf.length) {
- DEBUG(0,("common_gss_encrypt_buffer: gss_unwrap size (%u) too large (%u) !\n",
- (unsigned int)out_buf.length,
- (unsigned int)in_buf.length ));
- gss_release_buffer(&minor, &out_buf);
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- memcpy(buf + 8, out_buf.value, out_buf.length);
- smb_setlen((char *)out_buf.value, buf, out_buf.length + 4);
-
- gss_release_buffer(&minor, &out_buf);
- return NT_STATUS_OK;
-}
-
-/******************************************************************************
- Generic code for client and server.
- gss-api encrypt an outgoing buffer. Return the alloced encrypted pointer in buf_out.
-******************************************************************************/
-
-static NTSTATUS common_gss_encrypt_buffer(struct smb_tran_enc_state_gss *gss_state,
- uint16 enc_ctx_num,
- char *buf,
- char **ppbuf_out)
-{
- gss_ctx_id_t gss_ctx = gss_state->gss_ctx;
- OM_uint32 ret = 0;
- OM_uint32 minor = 0;
- int flags_got = 0;
- gss_buffer_desc in_buf, out_buf;
- size_t buf_len = smb_len(buf) + 4; /* Don't forget the 4 length bytes. */
-
- *ppbuf_out = NULL;
-
- if (buf_len < 8) {
- return NT_STATUS_BUFFER_TOO_SMALL;
- }
-
- in_buf.value = buf + 8;
- in_buf.length = buf_len - 8;
-
- ret = gss_wrap(&minor,
- gss_ctx,
- True, /* we want sign+seal. */
- GSS_C_QOP_DEFAULT,
- &in_buf,
- &flags_got, /* did we get sign+seal ? */
- &out_buf);
-
- if (ret != GSS_S_COMPLETE) {
- ADS_STATUS adss = ADS_ERROR_GSS(ret, minor);
- DEBUG(0,("common_gss_encrypt_buffer: gss_wrap failed. Error %s\n",
- ads_errstr(adss) ));
- return map_nt_error_from_gss(ret, minor);
- }
-
- if (!flags_got) {
- /* Sign+seal not supported. */
- gss_release_buffer(&minor, &out_buf);
- return NT_STATUS_NOT_SUPPORTED;
- }
-
- /* Ya see - this is why I *hate* gss-api. I don't
- * want to have to malloc another buffer of the
- * same size + 8 bytes just to get a continuous
- * header + buffer, but gss won't let me pass in
- * a pre-allocated buffer. Bastards (and you know
- * who you are....). I might fix this by
- * going to "encrypt_and_send" passing in a file
- * descriptor and doing scatter-gather write with
- * TCP cork on Linux. But I shouldn't have to
- * bother :-*(. JRA.
- */
-
- *ppbuf_out = (char *)SMB_MALLOC(out_buf.length + 8); /* We know this can't wrap. */
- if (!*ppbuf_out) {
- gss_release_buffer(&minor, &out_buf);
- return NT_STATUS_NO_MEMORY;
- }
-
- memcpy(*ppbuf_out+8, out_buf.value, out_buf.length);
- smb_set_enclen(*ppbuf_out, out_buf.length + 4, enc_ctx_num);
-
- gss_release_buffer(&minor, &out_buf);
- return NT_STATUS_OK;
-}
-#endif
-
-/******************************************************************************
- Generic code for client and server.
- Encrypt an outgoing buffer. Return the alloced encrypted pointer in buf_out.
-******************************************************************************/
-
-NTSTATUS common_encrypt_buffer(struct smb_trans_enc_state *es, char *buffer, char **buf_out)
-{
- if (!common_encryption_on(es)) {
- /* Not encrypting. */
- *buf_out = buffer;
- return NT_STATUS_OK;
- }
-
- switch (es->smb_enc_type) {
- case SMB_TRANS_ENC_NTLM:
- return common_ntlm_encrypt_buffer(es->s.ntlmssp_state, es->enc_ctx_num, buffer, buf_out);
-#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
- case SMB_TRANS_ENC_GSS:
- return common_gss_encrypt_buffer(es->s.gss_state, es->enc_ctx_num, buffer, buf_out);
-#endif
- default:
- return NT_STATUS_NOT_SUPPORTED;
- }
-}
-
-/******************************************************************************
- Generic code for client and server.
- Decrypt an incoming SMB buffer. Replaces the data within it.
- New data must be less than or equal to the current length.
-******************************************************************************/
-
-NTSTATUS common_decrypt_buffer(struct smb_trans_enc_state *es, char *buf)
-{
- if (!common_encryption_on(es)) {
- /* Not decrypting. */
- return NT_STATUS_OK;
- }
-
- switch (es->smb_enc_type) {
- case SMB_TRANS_ENC_NTLM:
- return common_ntlm_decrypt_buffer(es->s.ntlmssp_state, buf);
-#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
- case SMB_TRANS_ENC_GSS:
- return common_gss_decrypt_buffer(es->s.gss_state, buf);
-#endif
- default:
- return NT_STATUS_NOT_SUPPORTED;
- }
-}
-
-#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
-/******************************************************************************
- Shutdown a gss encryption state.
-******************************************************************************/
-
-static void common_free_gss_state(struct smb_tran_enc_state_gss **pp_gss_state)
-{
- OM_uint32 minor = 0;
- struct smb_tran_enc_state_gss *gss_state = *pp_gss_state;
-
- if (gss_state->creds != GSS_C_NO_CREDENTIAL) {
- gss_release_cred(&minor, &gss_state->creds);
- }
- if (gss_state->gss_ctx != GSS_C_NO_CONTEXT) {
- gss_delete_sec_context(&minor, &gss_state->gss_ctx, NULL);
- }
- SAFE_FREE(*pp_gss_state);
-}
-#endif
-
-/******************************************************************************
- Shutdown an encryption state.
-******************************************************************************/
-
-void common_free_encryption_state(struct smb_trans_enc_state **pp_es)
-{
- struct smb_trans_enc_state *es = *pp_es;
-
- if (es == NULL) {
- return;
- }
-
- if (es->smb_enc_type == SMB_TRANS_ENC_NTLM) {
- if (es->s.ntlmssp_state) {
- ntlmssp_end(&es->s.ntlmssp_state);
- }
- }
-#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
- if (es->smb_enc_type == SMB_TRANS_ENC_GSS) {
- /* Free the gss context handle. */
- if (es->s.gss_state) {
- common_free_gss_state(&es->s.gss_state);
- }
- }
-#endif
- SAFE_FREE(es);
- *pp_es = NULL;
-}
-
-/******************************************************************************
- Free an encryption-allocated buffer.
-******************************************************************************/
-
-void common_free_enc_buffer(struct smb_trans_enc_state *es, char *buf)
-{
- if (!common_encryption_on(es)) {
- return;
- }
-
- if (es->smb_enc_type == SMB_TRANS_ENC_NTLM) {
- SAFE_FREE(buf);
- return;
- }
-
-#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
- if (es->smb_enc_type == SMB_TRANS_ENC_GSS) {
- OM_uint32 min;
- gss_buffer_desc rel_buf;
- rel_buf.value = buf;
- rel_buf.length = smb_len(buf) + 4;
- gss_release_buffer(&min, &rel_buf);
- }
-#endif
-}
-
-/******************************************************************************
- Client side encryption.
-******************************************************************************/
-
-/******************************************************************************
- Is client encryption on ?
-******************************************************************************/
-
-BOOL cli_encryption_on(struct cli_state *cli)
-{
- /* If we supported multiple encrytion contexts
- * here we'd look up based on tid.
- */
- return common_encryption_on(cli->trans_enc_state);
-}
-
-/******************************************************************************
- Shutdown a client encryption state.
-******************************************************************************/
-
-void cli_free_encryption_context(struct cli_state *cli)
-{
- common_free_encryption_state(&cli->trans_enc_state);
-}
-
-/******************************************************************************
- Free an encryption-allocated buffer.
-******************************************************************************/
-
-void cli_free_enc_buffer(struct cli_state *cli, char *buf)
-{
- /* We know this is an smb buffer, and we
- * didn't malloc, only copy, for a keepalive,
- * so ignore session keepalives. */
-
- if(CVAL(buf,0) == SMBkeepalive) {
- return;
- }
-
- /* If we supported multiple encrytion contexts
- * here we'd look up based on tid.
- */
- common_free_enc_buffer(cli->trans_enc_state, buf);
-}
-
-/******************************************************************************
- Decrypt an incoming buffer.
-******************************************************************************/
-
-NTSTATUS cli_decrypt_message(struct cli_state *cli)
-{
- NTSTATUS status;
- uint16 enc_ctx_num;
-
- /* Ignore session keepalives. */
- if(CVAL(cli->inbuf,0) == SMBkeepalive) {
- return NT_STATUS_OK;
- }
-
- status = get_enc_ctx_num(cli->inbuf, &enc_ctx_num);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
- return NT_STATUS_INVALID_HANDLE;
- }
-
- return common_decrypt_buffer(cli->trans_enc_state, cli->inbuf);
-}
-
-/******************************************************************************
- Encrypt an outgoing buffer. Return the encrypted pointer in buf_out.
-******************************************************************************/
-
-NTSTATUS cli_encrypt_message(struct cli_state *cli, char **buf_out)
-{
- /* Ignore session keepalives. */
- if(CVAL(cli->outbuf,0) == SMBkeepalive) {
- return NT_STATUS_OK;
- }
-
- /* If we supported multiple encrytion contexts
- * here we'd look up based on tid.
- */
- return common_encrypt_buffer(cli->trans_enc_state, cli->outbuf, buf_out);
-}