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Sweden-Number/dlls/secur32/schannel.c

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/* Copyright (C) 2005 Juan Lang
* Copyright 2008 Henri Verbeet
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* This file implements the schannel provider, or, the SSL/TLS implementations.
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#include <errno.h>
#include "windef.h"
#include "winbase.h"
#include "winnls.h"
#include "sspi.h"
#include "schannel.h"
#include "secur32_priv.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(secur32);
#if defined(SONAME_LIBGNUTLS) || defined (HAVE_SECURITY_SECURITY_H)
#define SCHAN_INVALID_HANDLE ~0UL
enum schan_handle_type
{
SCHAN_HANDLE_CRED,
SCHAN_HANDLE_CTX,
SCHAN_HANDLE_FREE
};
struct schan_handle
{
void *object;
enum schan_handle_type type;
};
struct schan_credentials
{
ULONG credential_use;
schan_imp_certificate_credentials credentials;
};
struct schan_context
{
schan_imp_session session;
ULONG req_ctx_attr;
};
struct schan_buffers
{
SIZE_T offset;
SIZE_T limit;
const SecBufferDesc *desc;
int current_buffer_idx;
BOOL allow_buffer_resize;
int (*get_next_buffer)(const struct schan_transport *, struct schan_buffers *);
};
struct schan_transport
{
struct schan_context *ctx;
struct schan_buffers in;
struct schan_buffers out;
};
static struct schan_handle *schan_handle_table;
static struct schan_handle *schan_free_handles;
static SIZE_T schan_handle_table_size;
static SIZE_T schan_handle_count;
static ULONG_PTR schan_alloc_handle(void *object, enum schan_handle_type type)
{
struct schan_handle *handle;
if (schan_free_handles)
{
DWORD index = schan_free_handles - schan_handle_table;
/* Use a free handle */
handle = schan_free_handles;
if (handle->type != SCHAN_HANDLE_FREE)
{
ERR("Handle %d(%p) is in the free list, but has type %#x.\n", index, handle, handle->type);
return SCHAN_INVALID_HANDLE;
}
schan_free_handles = handle->object;
handle->object = object;
handle->type = type;
return index;
}
if (!(schan_handle_count < schan_handle_table_size))
{
/* Grow the table */
SIZE_T new_size = schan_handle_table_size + (schan_handle_table_size >> 1);
struct schan_handle *new_table = HeapReAlloc(GetProcessHeap(), 0, schan_handle_table, new_size * sizeof(*schan_handle_table));
if (!new_table)
{
ERR("Failed to grow the handle table\n");
return SCHAN_INVALID_HANDLE;
}
schan_handle_table = new_table;
schan_handle_table_size = new_size;
}
handle = &schan_handle_table[schan_handle_count++];
handle->object = object;
handle->type = type;
return handle - schan_handle_table;
}
static void *schan_free_handle(ULONG_PTR handle_idx, enum schan_handle_type type)
{
struct schan_handle *handle;
void *object;
if (handle_idx == SCHAN_INVALID_HANDLE) return NULL;
if (handle_idx >= schan_handle_count) return NULL;
handle = &schan_handle_table[handle_idx];
if (handle->type != type)
{
ERR("Handle %ld(%p) is not of type %#x\n", handle_idx, handle, type);
return NULL;
}
object = handle->object;
handle->object = schan_free_handles;
handle->type = SCHAN_HANDLE_FREE;
schan_free_handles = handle;
return object;
}
static void *schan_get_object(ULONG_PTR handle_idx, enum schan_handle_type type)
{
struct schan_handle *handle;
if (handle_idx == SCHAN_INVALID_HANDLE) return NULL;
if (handle_idx >= schan_handle_count) return NULL;
handle = &schan_handle_table[handle_idx];
if (handle->type != type)
{
ERR("Handle %ld(%p) is not of type %#x\n", handle_idx, handle, type);
return NULL;
}
return handle->object;
}
static SECURITY_STATUS schan_QueryCredentialsAttributes(
PCredHandle phCredential, ULONG ulAttribute, VOID *pBuffer)
{
SECURITY_STATUS ret;
switch (ulAttribute)
{
case SECPKG_ATTR_SUPPORTED_ALGS:
if (pBuffer)
{
/* FIXME: get from CryptoAPI */
FIXME("SECPKG_ATTR_SUPPORTED_ALGS: stub\n");
ret = SEC_E_UNSUPPORTED_FUNCTION;
}
else
ret = SEC_E_INTERNAL_ERROR;
break;
case SECPKG_ATTR_CIPHER_STRENGTHS:
if (pBuffer)
{
SecPkgCred_CipherStrengths *r = pBuffer;
/* FIXME: get from CryptoAPI */
FIXME("SECPKG_ATTR_CIPHER_STRENGTHS: semi-stub\n");
r->dwMinimumCipherStrength = 40;
r->dwMaximumCipherStrength = 168;
ret = SEC_E_OK;
}
else
ret = SEC_E_INTERNAL_ERROR;
break;
case SECPKG_ATTR_SUPPORTED_PROTOCOLS:
if (pBuffer)
{
/* FIXME: get from OpenSSL? */
FIXME("SECPKG_ATTR_SUPPORTED_PROTOCOLS: stub\n");
ret = SEC_E_UNSUPPORTED_FUNCTION;
}
else
ret = SEC_E_INTERNAL_ERROR;
break;
default:
ret = SEC_E_UNSUPPORTED_FUNCTION;
}
return ret;
}
static SECURITY_STATUS SEC_ENTRY schan_QueryCredentialsAttributesA(
PCredHandle phCredential, ULONG ulAttribute, PVOID pBuffer)
{
SECURITY_STATUS ret;
TRACE("(%p, %d, %p)\n", phCredential, ulAttribute, pBuffer);
switch (ulAttribute)
{
case SECPKG_CRED_ATTR_NAMES:
FIXME("SECPKG_CRED_ATTR_NAMES: stub\n");
ret = SEC_E_UNSUPPORTED_FUNCTION;
break;
default:
ret = schan_QueryCredentialsAttributes(phCredential, ulAttribute,
pBuffer);
}
return ret;
}
static SECURITY_STATUS SEC_ENTRY schan_QueryCredentialsAttributesW(
PCredHandle phCredential, ULONG ulAttribute, PVOID pBuffer)
{
SECURITY_STATUS ret;
TRACE("(%p, %d, %p)\n", phCredential, ulAttribute, pBuffer);
switch (ulAttribute)
{
case SECPKG_CRED_ATTR_NAMES:
FIXME("SECPKG_CRED_ATTR_NAMES: stub\n");
ret = SEC_E_UNSUPPORTED_FUNCTION;
break;
default:
ret = schan_QueryCredentialsAttributes(phCredential, ulAttribute,
pBuffer);
}
return ret;
}
static SECURITY_STATUS schan_CheckCreds(const SCHANNEL_CRED *schanCred)
{
SECURITY_STATUS st;
DWORD i;
TRACE("dwVersion = %d\n", schanCred->dwVersion);
TRACE("cCreds = %d\n", schanCred->cCreds);
TRACE("hRootStore = %p\n", schanCred->hRootStore);
TRACE("cMappers = %d\n", schanCred->cMappers);
TRACE("cSupportedAlgs = %d:\n", schanCred->cSupportedAlgs);
for (i = 0; i < schanCred->cSupportedAlgs; i++)
TRACE("%08x\n", schanCred->palgSupportedAlgs[i]);
TRACE("grbitEnabledProtocols = %08x\n", schanCred->grbitEnabledProtocols);
TRACE("dwMinimumCipherStrength = %d\n", schanCred->dwMinimumCipherStrength);
TRACE("dwMaximumCipherStrength = %d\n", schanCred->dwMaximumCipherStrength);
TRACE("dwSessionLifespan = %d\n", schanCred->dwSessionLifespan);
TRACE("dwFlags = %08x\n", schanCred->dwFlags);
TRACE("dwCredFormat = %d\n", schanCred->dwCredFormat);
switch (schanCred->dwVersion)
{
case SCH_CRED_V3:
case SCHANNEL_CRED_VERSION:
break;
default:
return SEC_E_INTERNAL_ERROR;
}
if (schanCred->cCreds == 0)
st = SEC_E_NO_CREDENTIALS;
else if (schanCred->cCreds > 1)
st = SEC_E_UNKNOWN_CREDENTIALS;
else
{
DWORD keySpec;
HCRYPTPROV csp;
BOOL ret, freeCSP;
ret = CryptAcquireCertificatePrivateKey(schanCred->paCred[0],
0, /* FIXME: what flags to use? */ NULL,
&csp, &keySpec, &freeCSP);
if (ret)
{
st = SEC_E_OK;
if (freeCSP)
CryptReleaseContext(csp, 0);
}
else
st = SEC_E_UNKNOWN_CREDENTIALS;
}
return st;
}
static SECURITY_STATUS schan_AcquireClientCredentials(const SCHANNEL_CRED *schanCred,
PCredHandle phCredential, PTimeStamp ptsExpiry)
{
struct schan_credentials *creds;
SECURITY_STATUS st = SEC_E_OK;
TRACE("schanCred %p, phCredential %p, ptsExpiry %p\n", schanCred, phCredential, ptsExpiry);
if (schanCred)
{
st = schan_CheckCreds(schanCred);
if (st == SEC_E_NO_CREDENTIALS)
st = SEC_E_OK;
}
/* For now, the only thing I'm interested in is the direction of the
* connection, so just store it.
*/
if (st == SEC_E_OK)
{
ULONG_PTR handle;
creds = HeapAlloc(GetProcessHeap(), 0, sizeof(*creds));
if (!creds) return SEC_E_INSUFFICIENT_MEMORY;
handle = schan_alloc_handle(creds, SCHAN_HANDLE_CRED);
if (handle == SCHAN_INVALID_HANDLE) goto fail;
creds->credential_use = SECPKG_CRED_OUTBOUND;
if (!schan_imp_allocate_certificate_credentials(&creds->credentials))
{
schan_free_handle(handle, SCHAN_HANDLE_CRED);
goto fail;
}
phCredential->dwLower = handle;
phCredential->dwUpper = 0;
/* Outbound credentials have no expiry */
if (ptsExpiry)
{
ptsExpiry->LowPart = 0;
ptsExpiry->HighPart = 0;
}
}
return st;
fail:
HeapFree(GetProcessHeap(), 0, creds);
return SEC_E_INTERNAL_ERROR;
}
static SECURITY_STATUS schan_AcquireServerCredentials(const SCHANNEL_CRED *schanCred,
PCredHandle phCredential, PTimeStamp ptsExpiry)
{
SECURITY_STATUS st;
TRACE("schanCred %p, phCredential %p, ptsExpiry %p\n", schanCred, phCredential, ptsExpiry);
if (!schanCred) return SEC_E_NO_CREDENTIALS;
st = schan_CheckCreds(schanCred);
if (st == SEC_E_OK)
{
ULONG_PTR handle;
struct schan_credentials *creds;
creds = HeapAlloc(GetProcessHeap(), 0, sizeof(*creds));
if (!creds) return SEC_E_INSUFFICIENT_MEMORY;
creds->credential_use = SECPKG_CRED_INBOUND;
handle = schan_alloc_handle(creds, SCHAN_HANDLE_CRED);
if (handle == SCHAN_INVALID_HANDLE)
{
HeapFree(GetProcessHeap(), 0, creds);
return SEC_E_INTERNAL_ERROR;
}
phCredential->dwLower = handle;
phCredential->dwUpper = 0;
/* FIXME: get expiry from cert */
}
return st;
}
static SECURITY_STATUS schan_AcquireCredentialsHandle(ULONG fCredentialUse,
const SCHANNEL_CRED *schanCred, PCredHandle phCredential, PTimeStamp ptsExpiry)
{
SECURITY_STATUS ret;
if (fCredentialUse == SECPKG_CRED_OUTBOUND)
ret = schan_AcquireClientCredentials(schanCred, phCredential,
ptsExpiry);
else
ret = schan_AcquireServerCredentials(schanCred, phCredential,
ptsExpiry);
return ret;
}
static SECURITY_STATUS SEC_ENTRY schan_AcquireCredentialsHandleA(
SEC_CHAR *pszPrincipal, SEC_CHAR *pszPackage, ULONG fCredentialUse,
PLUID pLogonID, PVOID pAuthData, SEC_GET_KEY_FN pGetKeyFn,
PVOID pGetKeyArgument, PCredHandle phCredential, PTimeStamp ptsExpiry)
{
TRACE("(%s, %s, 0x%08x, %p, %p, %p, %p, %p, %p)\n",
debugstr_a(pszPrincipal), debugstr_a(pszPackage), fCredentialUse,
pLogonID, pAuthData, pGetKeyFn, pGetKeyArgument, phCredential, ptsExpiry);
return schan_AcquireCredentialsHandle(fCredentialUse,
pAuthData, phCredential, ptsExpiry);
}
static SECURITY_STATUS SEC_ENTRY schan_AcquireCredentialsHandleW(
SEC_WCHAR *pszPrincipal, SEC_WCHAR *pszPackage, ULONG fCredentialUse,
PLUID pLogonID, PVOID pAuthData, SEC_GET_KEY_FN pGetKeyFn,
PVOID pGetKeyArgument, PCredHandle phCredential, PTimeStamp ptsExpiry)
{
TRACE("(%s, %s, 0x%08x, %p, %p, %p, %p, %p, %p)\n",
debugstr_w(pszPrincipal), debugstr_w(pszPackage), fCredentialUse,
pLogonID, pAuthData, pGetKeyFn, pGetKeyArgument, phCredential, ptsExpiry);
return schan_AcquireCredentialsHandle(fCredentialUse,
pAuthData, phCredential, ptsExpiry);
}
static SECURITY_STATUS SEC_ENTRY schan_FreeCredentialsHandle(
PCredHandle phCredential)
{
struct schan_credentials *creds;
TRACE("phCredential %p\n", phCredential);
if (!phCredential) return SEC_E_INVALID_HANDLE;
creds = schan_free_handle(phCredential->dwLower, SCHAN_HANDLE_CRED);
if (!creds) return SEC_E_INVALID_HANDLE;
if (creds->credential_use == SECPKG_CRED_OUTBOUND)
schan_imp_free_certificate_credentials(creds->credentials);
HeapFree(GetProcessHeap(), 0, creds);
return SEC_E_OK;
}
static void init_schan_buffers(struct schan_buffers *s, const PSecBufferDesc desc,
int (*get_next_buffer)(const struct schan_transport *, struct schan_buffers *))
{
s->offset = 0;
s->limit = 0;
s->desc = desc;
s->current_buffer_idx = -1;
s->allow_buffer_resize = FALSE;
s->get_next_buffer = get_next_buffer;
}
static int schan_find_sec_buffer_idx(const SecBufferDesc *desc, unsigned int start_idx, ULONG buffer_type)
{
unsigned int i;
PSecBuffer buffer;
for (i = start_idx; i < desc->cBuffers; ++i)
{
buffer = &desc->pBuffers[i];
if (buffer->BufferType == buffer_type) return i;
}
return -1;
}
static void schan_resize_current_buffer(const struct schan_buffers *s, SIZE_T min_size)
{
SecBuffer *b = &s->desc->pBuffers[s->current_buffer_idx];
SIZE_T new_size = b->cbBuffer ? b->cbBuffer * 2 : 128;
void *new_data;
if (b->cbBuffer >= min_size || !s->allow_buffer_resize || min_size > UINT_MAX / 2) return;
while (new_size < min_size) new_size *= 2;
if (b->pvBuffer)
new_data = HeapReAlloc(GetProcessHeap(), 0, b->pvBuffer, new_size);
else
new_data = HeapAlloc(GetProcessHeap(), 0, new_size);
if (!new_data)
{
TRACE("Failed to resize %p from %d to %ld\n", b->pvBuffer, b->cbBuffer, new_size);
return;
}
b->cbBuffer = new_size;
b->pvBuffer = new_data;
}
static char *schan_get_buffer(const struct schan_transport *t, struct schan_buffers *s, size_t *count)
{
SIZE_T max_count;
PSecBuffer buffer;
if (!s->desc)
{
TRACE("No desc\n");
return NULL;
}
if (s->current_buffer_idx == -1)
{
/* Initial buffer */
int buffer_idx = s->get_next_buffer(t, s);
if (buffer_idx == -1)
{
TRACE("No next buffer\n");
return NULL;
}
s->current_buffer_idx = buffer_idx;
}
buffer = &s->desc->pBuffers[s->current_buffer_idx];
TRACE("Using buffer %d: cbBuffer %d, BufferType %#x, pvBuffer %p\n", s->current_buffer_idx, buffer->cbBuffer, buffer->BufferType, buffer->pvBuffer);
schan_resize_current_buffer(s, s->offset + *count);
max_count = buffer->cbBuffer - s->offset;
if (!max_count)
{
int buffer_idx;
s->allow_buffer_resize = FALSE;
buffer_idx = s->get_next_buffer(t, s);
if (buffer_idx == -1)
{
TRACE("No next buffer\n");
return NULL;
}
s->current_buffer_idx = buffer_idx;
s->offset = 0;
return schan_get_buffer(t, s, count);
}
if (*count > max_count) *count = max_count;
return (char *)buffer->pvBuffer + s->offset;
}
/* schan_pull
* Read data from the transport input buffer.
*
* t - The session transport object.
* buff - The buffer into which to store the read data. Must be at least
* *buff_len bytes in length.
* buff_len - On input, *buff_len is the desired length to read. On successful
* return, *buff_len is the number of bytes actually read.
*
* Returns:
* 0 on success, in which case:
* *buff_len == 0 indicates end of file.
* *buff_len > 0 indicates that some data was read. May be less than
* what was requested, in which case the caller should call again if/
* when they want more.
* EAGAIN when no data could be read without blocking
* another errno-style error value on failure
*
*/
int schan_pull(struct schan_transport *t, void *buff, size_t *buff_len)
{
char *b;
size_t local_len = *buff_len;
TRACE("Pull %zu bytes\n", local_len);
*buff_len = 0;
b = schan_get_buffer(t, &t->in, &local_len);
if (!b)
return EAGAIN;
if (t->in.limit != 0 && t->in.offset + local_len >= t->in.limit)
{
local_len = t->in.limit - t->in.offset;
if (local_len == 0)
return EAGAIN;
}
memcpy(buff, b, local_len);
t->in.offset += local_len;
TRACE("Read %zu bytes\n", local_len);
*buff_len = local_len;
return 0;
}
/* schan_push
* Write data to the transport output buffer.
*
* t - The session transport object.
* buff - The buffer of data to write. Must be at least *buff_len bytes in length.
* buff_len - On input, *buff_len is the desired length to write. On successful
* return, *buff_len is the number of bytes actually written.
*
* Returns:
* 0 on success
* *buff_len will be > 0 indicating how much data was written. May be less
* than what was requested, in which case the caller should call again
if/when they want to write more.
* EAGAIN when no data could be written without blocking
* another errno-style error value on failure
*
*/
int schan_push(struct schan_transport *t, const void *buff, size_t *buff_len)
{
char *b;
size_t local_len = *buff_len;
TRACE("Push %zu bytes\n", local_len);
*buff_len = 0;
b = schan_get_buffer(t, &t->out, &local_len);
if (!b)
return EAGAIN;
memcpy(b, buff, local_len);
t->out.offset += local_len;
TRACE("Wrote %zu bytes\n", local_len);
*buff_len = local_len;
return 0;
}
schan_imp_session schan_session_for_transport(struct schan_transport* t)
{
return t->ctx->session;
}
static int schan_init_sec_ctx_get_next_buffer(const struct schan_transport *t, struct schan_buffers *s)
{
if (s->current_buffer_idx == -1)
{
int idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
if (t->ctx->req_ctx_attr & ISC_REQ_ALLOCATE_MEMORY)
{
if (idx == -1)
{
idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_EMPTY);
if (idx != -1) s->desc->pBuffers[idx].BufferType = SECBUFFER_TOKEN;
}
if (idx != -1 && !s->desc->pBuffers[idx].pvBuffer)
{
s->desc->pBuffers[idx].cbBuffer = 0;
s->allow_buffer_resize = TRUE;
}
}
return idx;
}
return -1;
}
static void dump_buffer_desc(SecBufferDesc *desc)
{
unsigned int i;
if (!desc) return;
TRACE("Buffer desc %p:\n", desc);
for (i = 0; i < desc->cBuffers; ++i)
{
SecBuffer *b = &desc->pBuffers[i];
TRACE("\tbuffer %u: cbBuffer %d, BufferType %#x pvBuffer %p\n", i, b->cbBuffer, b->BufferType, b->pvBuffer);
}
}
/***********************************************************************
* InitializeSecurityContextW
*/
static SECURITY_STATUS SEC_ENTRY schan_InitializeSecurityContextW(
PCredHandle phCredential, PCtxtHandle phContext, SEC_WCHAR *pszTargetName,
ULONG fContextReq, ULONG Reserved1, ULONG TargetDataRep,
PSecBufferDesc pInput, ULONG Reserved2, PCtxtHandle phNewContext,
PSecBufferDesc pOutput, ULONG *pfContextAttr, PTimeStamp ptsExpiry)
{
struct schan_context *ctx;
struct schan_buffers *out_buffers;
struct schan_credentials *cred;
struct schan_transport transport;
SECURITY_STATUS ret;
TRACE("%p %p %s 0x%08x %d %d %p %d %p %p %p %p\n", phCredential, phContext,
debugstr_w(pszTargetName), fContextReq, Reserved1, TargetDataRep, pInput,
Reserved1, phNewContext, pOutput, pfContextAttr, ptsExpiry);
dump_buffer_desc(pInput);
dump_buffer_desc(pOutput);
if (!phContext)
{
ULONG_PTR handle;
if (!phCredential) return SEC_E_INVALID_HANDLE;
cred = schan_get_object(phCredential->dwLower, SCHAN_HANDLE_CRED);
if (!cred) return SEC_E_INVALID_HANDLE;
if (!(cred->credential_use & SECPKG_CRED_OUTBOUND))
{
WARN("Invalid credential use %#x\n", cred->credential_use);
return SEC_E_INVALID_HANDLE;
}
ctx = HeapAlloc(GetProcessHeap(), 0, sizeof(*ctx));
if (!ctx) return SEC_E_INSUFFICIENT_MEMORY;
handle = schan_alloc_handle(ctx, SCHAN_HANDLE_CTX);
if (handle == SCHAN_INVALID_HANDLE)
{
HeapFree(GetProcessHeap(), 0, ctx);
return SEC_E_INTERNAL_ERROR;
}
if (!schan_imp_create_session(&ctx->session, FALSE, cred->credentials))
{
schan_free_handle(handle, SCHAN_HANDLE_CTX);
HeapFree(GetProcessHeap(), 0, ctx);
return SEC_E_INTERNAL_ERROR;
}
phNewContext->dwLower = handle;
phNewContext->dwUpper = 0;
}
else
{
ctx = schan_get_object(phContext->dwLower, SCHAN_HANDLE_CTX);
}
ctx->req_ctx_attr = fContextReq;
transport.ctx = ctx;
init_schan_buffers(&transport.in, pInput, schan_init_sec_ctx_get_next_buffer);
init_schan_buffers(&transport.out, pOutput, schan_init_sec_ctx_get_next_buffer);
schan_imp_set_session_transport(ctx->session, &transport);
/* Perform the TLS handshake */
ret = schan_imp_handshake(ctx->session);
if(transport.in.offset && transport.in.offset != pInput->pBuffers[0].cbBuffer) {
if(pInput->cBuffers<2 || pInput->pBuffers[1].BufferType!=SECBUFFER_EMPTY)
return SEC_E_INVALID_TOKEN;
pInput->pBuffers[1].BufferType = SECBUFFER_EXTRA;
pInput->pBuffers[1].cbBuffer = pInput->pBuffers[0].cbBuffer-transport.in.offset;
}
out_buffers = &transport.out;
if (out_buffers->current_buffer_idx != -1)
{
SecBuffer *buffer = &out_buffers->desc->pBuffers[out_buffers->current_buffer_idx];
buffer->cbBuffer = out_buffers->offset;
}
*pfContextAttr = 0;
if (ctx->req_ctx_attr & ISC_REQ_ALLOCATE_MEMORY)
*pfContextAttr |= ISC_RET_ALLOCATED_MEMORY;
return ret;
}
/***********************************************************************
* InitializeSecurityContextA
*/
static SECURITY_STATUS SEC_ENTRY schan_InitializeSecurityContextA(
PCredHandle phCredential, PCtxtHandle phContext, SEC_CHAR *pszTargetName,
ULONG fContextReq, ULONG Reserved1, ULONG TargetDataRep,
PSecBufferDesc pInput, ULONG Reserved2, PCtxtHandle phNewContext,
PSecBufferDesc pOutput, ULONG *pfContextAttr, PTimeStamp ptsExpiry)
{
SECURITY_STATUS ret;
SEC_WCHAR *target_name = NULL;
TRACE("%p %p %s %d %d %d %p %d %p %p %p %p\n", phCredential, phContext,
debugstr_a(pszTargetName), fContextReq, Reserved1, TargetDataRep, pInput,
Reserved1, phNewContext, pOutput, pfContextAttr, ptsExpiry);
if (pszTargetName)
{
INT len = MultiByteToWideChar(CP_ACP, 0, pszTargetName, -1, NULL, 0);
target_name = HeapAlloc(GetProcessHeap(), 0, len * sizeof(*target_name));
MultiByteToWideChar(CP_ACP, 0, pszTargetName, -1, target_name, len);
}
ret = schan_InitializeSecurityContextW(phCredential, phContext, target_name,
fContextReq, Reserved1, TargetDataRep, pInput, Reserved2,
phNewContext, pOutput, pfContextAttr, ptsExpiry);
HeapFree(GetProcessHeap(), 0, target_name);
return ret;
}
static SECURITY_STATUS SEC_ENTRY schan_QueryContextAttributesW(
PCtxtHandle context_handle, ULONG attribute, PVOID buffer)
{
struct schan_context *ctx;
TRACE("context_handle %p, attribute %#x, buffer %p\n",
context_handle, attribute, buffer);
if (!context_handle) return SEC_E_INVALID_HANDLE;
ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
switch(attribute)
{
case SECPKG_ATTR_STREAM_SIZES:
{
SecPkgContext_ConnectionInfo info;
SECURITY_STATUS status = schan_imp_get_connection_info(ctx->session, &info);
if (status == SEC_E_OK)
{
SecPkgContext_StreamSizes *stream_sizes = buffer;
size_t mac_size = info.dwHashStrength;
unsigned int block_size = schan_imp_get_session_cipher_block_size(ctx->session);
TRACE("Using %zu mac bytes, block size %u\n", mac_size, block_size);
/* These are defined by the TLS RFC */
stream_sizes->cbHeader = 5;
stream_sizes->cbTrailer = mac_size + 256; /* Max 255 bytes padding + 1 for padding size */
stream_sizes->cbMaximumMessage = 1 << 14;
stream_sizes->cbBuffers = 4;
stream_sizes->cbBlockSize = block_size;
}
return status;
}
case SECPKG_ATTR_REMOTE_CERT_CONTEXT:
{
PCCERT_CONTEXT *cert = buffer;
return schan_imp_get_session_peer_certificate(ctx->session, cert);
}
case SECPKG_ATTR_CONNECTION_INFO:
{
SecPkgContext_ConnectionInfo *info = buffer;
return schan_imp_get_connection_info(ctx->session, info);
}
default:
FIXME("Unhandled attribute %#x\n", attribute);
return SEC_E_UNSUPPORTED_FUNCTION;
}
}
static SECURITY_STATUS SEC_ENTRY schan_QueryContextAttributesA(
PCtxtHandle context_handle, ULONG attribute, PVOID buffer)
{
TRACE("context_handle %p, attribute %#x, buffer %p\n",
context_handle, attribute, buffer);
switch(attribute)
{
case SECPKG_ATTR_STREAM_SIZES:
return schan_QueryContextAttributesW(context_handle, attribute, buffer);
case SECPKG_ATTR_REMOTE_CERT_CONTEXT:
return schan_QueryContextAttributesW(context_handle, attribute, buffer);
case SECPKG_ATTR_CONNECTION_INFO:
return schan_QueryContextAttributesW(context_handle, attribute, buffer);
default:
FIXME("Unhandled attribute %#x\n", attribute);
return SEC_E_UNSUPPORTED_FUNCTION;
}
}
static int schan_encrypt_message_get_next_buffer(const struct schan_transport *t, struct schan_buffers *s)
{
SecBuffer *b;
if (s->current_buffer_idx == -1)
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_STREAM_HEADER);
b = &s->desc->pBuffers[s->current_buffer_idx];
if (b->BufferType == SECBUFFER_STREAM_HEADER)
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
if (b->BufferType == SECBUFFER_DATA)
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_STREAM_TRAILER);
return -1;
}
static int schan_encrypt_message_get_next_buffer_token(const struct schan_transport *t, struct schan_buffers *s)
{
SecBuffer *b;
if (s->current_buffer_idx == -1)
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
b = &s->desc->pBuffers[s->current_buffer_idx];
if (b->BufferType == SECBUFFER_TOKEN)
{
int idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
if (idx != s->current_buffer_idx) return -1;
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
}
if (b->BufferType == SECBUFFER_DATA)
{
int idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
if (idx != -1)
idx = schan_find_sec_buffer_idx(s->desc, idx + 1, SECBUFFER_TOKEN);
return idx;
}
return -1;
}
static SECURITY_STATUS SEC_ENTRY schan_EncryptMessage(PCtxtHandle context_handle,
ULONG quality, PSecBufferDesc message, ULONG message_seq_no)
{
struct schan_transport transport;
struct schan_context *ctx;
struct schan_buffers *b;
SecBuffer *buffer;
SIZE_T data_size;
char *data;
ssize_t sent = 0;
int idx;
TRACE("context_handle %p, quality %d, message %p, message_seq_no %d\n",
context_handle, quality, message, message_seq_no);
if (!context_handle) return SEC_E_INVALID_HANDLE;
ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
dump_buffer_desc(message);
idx = schan_find_sec_buffer_idx(message, 0, SECBUFFER_DATA);
if (idx == -1)
{
WARN("No data buffer passed\n");
return SEC_E_INTERNAL_ERROR;
}
buffer = &message->pBuffers[idx];
data_size = buffer->cbBuffer;
data = HeapAlloc(GetProcessHeap(), 0, data_size);
memcpy(data, buffer->pvBuffer, data_size);
transport.ctx = ctx;
init_schan_buffers(&transport.in, NULL, NULL);
if (schan_find_sec_buffer_idx(message, 0, SECBUFFER_STREAM_HEADER) != -1)
init_schan_buffers(&transport.out, message, schan_encrypt_message_get_next_buffer);
else
init_schan_buffers(&transport.out, message, schan_encrypt_message_get_next_buffer_token);
schan_imp_set_session_transport(ctx->session, &transport);
while (sent < data_size)
{
size_t length = data_size - sent;
SECURITY_STATUS status = schan_imp_send(ctx->session, data + sent, &length);
if (status == SEC_I_CONTINUE_NEEDED)
break;
else if (status != SEC_E_OK)
{
HeapFree(GetProcessHeap(), 0, data);
ERR("Returning %d\n", status);
return status;
}
sent += length;
}
TRACE("Sent %zd bytes\n", sent);
b = &transport.out;
b->desc->pBuffers[b->current_buffer_idx].cbBuffer = b->offset;
HeapFree(GetProcessHeap(), 0, data);
return SEC_E_OK;
}
static int schan_decrypt_message_get_next_buffer(const struct schan_transport *t, struct schan_buffers *s)
{
if (s->current_buffer_idx == -1)
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
return -1;
}
static int schan_validate_decrypt_buffer_desc(PSecBufferDesc message)
{
int data_idx = -1;
unsigned int empty_count = 0;
unsigned int i;
if (message->cBuffers < 4)
{
WARN("Less than four buffers passed\n");
return -1;
}
for (i = 0; i < message->cBuffers; ++i)
{
SecBuffer *b = &message->pBuffers[i];
if (b->BufferType == SECBUFFER_DATA)
{
if (data_idx != -1)
{
WARN("More than one data buffer passed\n");
return -1;
}
data_idx = i;
}
else if (b->BufferType == SECBUFFER_EMPTY)
++empty_count;
}
if (data_idx == -1)
{
WARN("No data buffer passed\n");
return -1;
}
if (empty_count < 3)
{
WARN("Less than three empty buffers passed\n");
return -1;
}
return data_idx;
}
static void schan_decrypt_fill_buffer(PSecBufferDesc message, ULONG buffer_type, void *data, ULONG size)
{
int idx;
SecBuffer *buffer;
idx = schan_find_sec_buffer_idx(message, 0, SECBUFFER_EMPTY);
buffer = &message->pBuffers[idx];
buffer->BufferType = buffer_type;
buffer->pvBuffer = data;
buffer->cbBuffer = size;
}
static SECURITY_STATUS SEC_ENTRY schan_DecryptMessage(PCtxtHandle context_handle,
PSecBufferDesc message, ULONG message_seq_no, PULONG quality)
{
struct schan_transport transport;
struct schan_context *ctx;
SecBuffer *buffer;
SIZE_T data_size;
char *data;
unsigned expected_size;
ssize_t received = 0;
int idx;
unsigned char *buf_ptr;
TRACE("context_handle %p, message %p, message_seq_no %d, quality %p\n",
context_handle, message, message_seq_no, quality);
if (!context_handle) return SEC_E_INVALID_HANDLE;
ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
dump_buffer_desc(message);
idx = schan_validate_decrypt_buffer_desc(message);
if (idx == -1)
return SEC_E_INVALID_TOKEN;
buffer = &message->pBuffers[idx];
buf_ptr = buffer->pvBuffer;
expected_size = 5 + ((buf_ptr[3] << 8) | buf_ptr[4]);
if(buffer->cbBuffer < expected_size)
{
TRACE("Expected %u bytes, but buffer only contains %u bytes\n", expected_size, buffer->cbBuffer);
buffer->BufferType = SECBUFFER_MISSING;
buffer->cbBuffer = expected_size - buffer->cbBuffer;
/* This is a bit weird, but windows does it too */
idx = schan_find_sec_buffer_idx(message, 0, SECBUFFER_EMPTY);
buffer = &message->pBuffers[idx];
buffer->BufferType = SECBUFFER_MISSING;
buffer->cbBuffer = expected_size - buffer->cbBuffer;
TRACE("Returning SEC_E_INCOMPLETE_MESSAGE\n");
return SEC_E_INCOMPLETE_MESSAGE;
}
data_size = buffer->cbBuffer;
data = HeapAlloc(GetProcessHeap(), 0, data_size);
transport.ctx = ctx;
init_schan_buffers(&transport.in, message, schan_decrypt_message_get_next_buffer);
transport.in.limit = expected_size;
init_schan_buffers(&transport.out, NULL, NULL);
schan_imp_set_session_transport(ctx->session, &transport);
while (received < data_size)
{
size_t length = data_size - received;
SECURITY_STATUS status = schan_imp_recv(ctx->session, data + received, &length);
if (status == SEC_I_CONTINUE_NEEDED)
{
if (!received)
{
HeapFree(GetProcessHeap(), 0, data);
TRACE("Returning SEC_E_INCOMPLETE_MESSAGE\n");
return SEC_E_INCOMPLETE_MESSAGE;
}
break;
}
else if (status != SEC_E_OK)
{
HeapFree(GetProcessHeap(), 0, data);
ERR("Returning %d\n", status);
return status;
}
else if (!length)
break;
received += length;
}
TRACE("Received %zd bytes\n", received);
memcpy(buf_ptr + 5, data, received);
HeapFree(GetProcessHeap(), 0, data);
schan_decrypt_fill_buffer(message, SECBUFFER_DATA,
buf_ptr + 5, received);
schan_decrypt_fill_buffer(message, SECBUFFER_STREAM_TRAILER,
buf_ptr + 5 + received, buffer->cbBuffer - 5 - received);
if(buffer->cbBuffer > expected_size)
schan_decrypt_fill_buffer(message, SECBUFFER_EXTRA,
buf_ptr + expected_size, buffer->cbBuffer - expected_size);
buffer->BufferType = SECBUFFER_STREAM_HEADER;
buffer->cbBuffer = 5;
return SEC_E_OK;
}
static SECURITY_STATUS SEC_ENTRY schan_DeleteSecurityContext(PCtxtHandle context_handle)
{
struct schan_context *ctx;
TRACE("context_handle %p\n", context_handle);
if (!context_handle) return SEC_E_INVALID_HANDLE;
ctx = schan_free_handle(context_handle->dwLower, SCHAN_HANDLE_CTX);
if (!ctx) return SEC_E_INVALID_HANDLE;
schan_imp_dispose_session(ctx->session);
HeapFree(GetProcessHeap(), 0, ctx);
return SEC_E_OK;
}
static const SecurityFunctionTableA schanTableA = {
1,
NULL, /* EnumerateSecurityPackagesA */
schan_QueryCredentialsAttributesA,
schan_AcquireCredentialsHandleA,
schan_FreeCredentialsHandle,
NULL, /* Reserved2 */
schan_InitializeSecurityContextA,
NULL, /* AcceptSecurityContext */
NULL, /* CompleteAuthToken */
schan_DeleteSecurityContext,
NULL, /* ApplyControlToken */
schan_QueryContextAttributesA,
NULL, /* ImpersonateSecurityContext */
NULL, /* RevertSecurityContext */
NULL, /* MakeSignature */
NULL, /* VerifySignature */
FreeContextBuffer,
NULL, /* QuerySecurityPackageInfoA */
NULL, /* Reserved3 */
NULL, /* Reserved4 */
NULL, /* ExportSecurityContext */
NULL, /* ImportSecurityContextA */
NULL, /* AddCredentialsA */
NULL, /* Reserved8 */
NULL, /* QuerySecurityContextToken */
schan_EncryptMessage,
schan_DecryptMessage,
NULL, /* SetContextAttributesA */
};
static const SecurityFunctionTableW schanTableW = {
1,
NULL, /* EnumerateSecurityPackagesW */
schan_QueryCredentialsAttributesW,
schan_AcquireCredentialsHandleW,
schan_FreeCredentialsHandle,
NULL, /* Reserved2 */
schan_InitializeSecurityContextW,
NULL, /* AcceptSecurityContext */
NULL, /* CompleteAuthToken */
schan_DeleteSecurityContext,
NULL, /* ApplyControlToken */
schan_QueryContextAttributesW,
NULL, /* ImpersonateSecurityContext */
NULL, /* RevertSecurityContext */
NULL, /* MakeSignature */
NULL, /* VerifySignature */
FreeContextBuffer,
NULL, /* QuerySecurityPackageInfoW */
NULL, /* Reserved3 */
NULL, /* Reserved4 */
NULL, /* ExportSecurityContext */
NULL, /* ImportSecurityContextW */
NULL, /* AddCredentialsW */
NULL, /* Reserved8 */
NULL, /* QuerySecurityContextToken */
schan_EncryptMessage,
schan_DecryptMessage,
NULL, /* SetContextAttributesW */
};
static const WCHAR schannelComment[] = { 'S','c','h','a','n','n','e','l',' ',
'S','e','c','u','r','i','t','y',' ','P','a','c','k','a','g','e',0 };
static const WCHAR schannelDllName[] = { 's','c','h','a','n','n','e','l','.','d','l','l',0 };
void SECUR32_initSchannelSP(void)
{
/* This is what Windows reports. This shouldn't break any applications
* even though the functions are missing, because the wrapper will
* return SEC_E_UNSUPPORTED_FUNCTION if our function is NULL.
*/
static const LONG caps =
SECPKG_FLAG_INTEGRITY |
SECPKG_FLAG_PRIVACY |
SECPKG_FLAG_CONNECTION |
SECPKG_FLAG_MULTI_REQUIRED |
SECPKG_FLAG_EXTENDED_ERROR |
SECPKG_FLAG_IMPERSONATION |
SECPKG_FLAG_ACCEPT_WIN32_NAME |
SECPKG_FLAG_STREAM;
static const short version = 1;
static const LONG maxToken = 16384;
SEC_WCHAR *uniSPName = (SEC_WCHAR *)UNISP_NAME_W,
*schannel = (SEC_WCHAR *)SCHANNEL_NAME_W;
const SecPkgInfoW info[] = {
{ caps, version, UNISP_RPC_ID, maxToken, uniSPName, uniSPName },
{ caps, version, UNISP_RPC_ID, maxToken, schannel,
(SEC_WCHAR *)schannelComment },
};
SecureProvider *provider;
if (!schan_imp_init())
return;
schan_handle_table = HeapAlloc(GetProcessHeap(), 0, 64 * sizeof(*schan_handle_table));
if (!schan_handle_table)
{
ERR("Failed to allocate schannel handle table.\n");
goto fail;
}
schan_handle_table_size = 64;
provider = SECUR32_addProvider(&schanTableA, &schanTableW, schannelDllName);
if (!provider)
{
ERR("Failed to add schannel provider.\n");
goto fail;
}
SECUR32_addPackages(provider, sizeof(info) / sizeof(info[0]), NULL, info);
return;
fail:
HeapFree(GetProcessHeap(), 0, schan_handle_table);
schan_handle_table = NULL;
schan_imp_deinit();
return;
}
void SECUR32_deinitSchannelSP(void)
{
SIZE_T i = schan_handle_count;
if (!schan_handle_table) return;
/* deinitialized sessions first because a pointer to the credentials
* may be stored for the session. */
while (i--)
{
if (schan_handle_table[i].type == SCHAN_HANDLE_CTX)
{
struct schan_context *ctx = schan_free_handle(i, SCHAN_HANDLE_CTX);
schan_imp_dispose_session(ctx->session);
HeapFree(GetProcessHeap(), 0, ctx);
}
}
i = schan_handle_count;
while (i--)
{
if (schan_handle_table[i].type != SCHAN_HANDLE_FREE)
{
struct schan_credentials *cred;
cred = schan_free_handle(i, SCHAN_HANDLE_CRED);
schan_imp_free_certificate_credentials(cred->credentials);
HeapFree(GetProcessHeap(), 0, cred);
}
}
HeapFree(GetProcessHeap(), 0, schan_handle_table);
schan_imp_deinit();
}
#else /* SONAME_LIBGNUTLS || HAVE_SECURITY_SECURITY_H */
void SECUR32_initSchannelSP(void)
{
ERR("TLS library not found, SSL connections will fail\n");
}
void SECUR32_deinitSchannelSP(void) {}
#endif /* SONAME_LIBGNUTLS || HAVE_SECURITY_SECURITY_H */
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