--- /dev/null
+#ifndef NO_GSSAPI
+
+#include <windows.h>
+#define SECURITY_WIN32
+#include <security.h>
+#include "sshgss.h"
+#include "misc.h"
+
+#define NOTHING
+#define DECL_SSPI_FUNCTION(linkage, rettype, name, params) \
+ typedef rettype (WINAPI *t_##name) params; \
+ linkage t_##name p_##name
+#define GET_SSPI_FUNCTION(module, name) \
+ p_##name = module ? (t_##name) GetProcAddress(module, #name) : NULL
+
+DECL_SSPI_FUNCTION(static, SECURITY_STATUS,
+ AcquireCredentialsHandleA,
+ (SEC_CHAR *, SEC_CHAR *, ULONG, PLUID,
+ PVOID, SEC_GET_KEY_FN, PVOID, PCredHandle, PTimeStamp));
+DECL_SSPI_FUNCTION(static, SECURITY_STATUS,
+ InitializeSecurityContextA,
+ (PCredHandle, PCtxtHandle, SEC_CHAR *, ULONG, ULONG,
+ ULONG, PSecBufferDesc, ULONG, PCtxtHandle,
+ PSecBufferDesc, PULONG, PTimeStamp));
+DECL_SSPI_FUNCTION(static, SECURITY_STATUS,
+ FreeContextBuffer,
+ (PVOID));
+DECL_SSPI_FUNCTION(static, SECURITY_STATUS,
+ FreeCredentialsHandle,
+ (PCredHandle));
+DECL_SSPI_FUNCTION(static, SECURITY_STATUS,
+ DeleteSecurityContext,
+ (PCtxtHandle));
+DECL_SSPI_FUNCTION(static, SECURITY_STATUS,
+ QueryContextAttributesA,
+ (PCtxtHandle, ULONG, PVOID));
+DECL_SSPI_FUNCTION(static, SECURITY_STATUS,
+ MakeSignature,
+ (PCtxtHandle, ULONG, PSecBufferDesc, ULONG));
+
+static HMODULE security_module = NULL;
+
+typedef struct winSsh_gss_ctx {
+ unsigned long maj_stat;
+ unsigned long min_stat;
+ CredHandle cred_handle;
+ CtxtHandle context;
+ PCtxtHandle context_handle;
+ TimeStamp expiry;
+} winSsh_gss_ctx;
+
+
+const Ssh_gss_buf gss_mech_krb5={9,"\x2A\x86\x48\x86\xF7\x12\x01\x02\x02"};
+
+int ssh_gss_init(void)
+{
+ if (security_module)
+ return 1; /* already initialised */
+
+ security_module = LoadLibrary("secur32.dll");
+ if (security_module) {
+ GET_SSPI_FUNCTION(security_module, AcquireCredentialsHandleA);
+ GET_SSPI_FUNCTION(security_module, InitializeSecurityContextA);
+ GET_SSPI_FUNCTION(security_module, FreeContextBuffer);
+ GET_SSPI_FUNCTION(security_module, FreeCredentialsHandle);
+ GET_SSPI_FUNCTION(security_module, DeleteSecurityContext);
+ GET_SSPI_FUNCTION(security_module, QueryContextAttributesA);
+ GET_SSPI_FUNCTION(security_module, MakeSignature);
+ return 1;
+ }
+ return 0;
+}
+
+Ssh_gss_stat ssh_gss_indicate_mech(Ssh_gss_buf *mech)
+{
+ *mech = gss_mech_krb5;
+ return SSH_GSS_OK;
+}
+
+
+Ssh_gss_stat ssh_gss_import_name(char *host, Ssh_gss_name *srv_name)
+{
+ char *pStr;
+
+ /* Check hostname */
+ if (host == NULL) return SSH_GSS_FAILURE;
+
+ /* copy it into form host/FQDN */
+ pStr = dupcat("host/", host, NULL);
+
+ *srv_name = (Ssh_gss_name) pStr;
+
+ return SSH_GSS_OK;
+}
+
+Ssh_gss_stat ssh_gss_acquire_cred(Ssh_gss_ctx *ctx)
+{
+ winSsh_gss_ctx *winctx = snew(winSsh_gss_ctx);
+
+ /* prepare our "wrapper" structure */
+ winctx->maj_stat = winctx->min_stat = SEC_E_OK;
+ winctx->context_handle = NULL;
+
+ /* Specifying no principal name here means use the credentials of
+ the current logged-in user */
+
+ winctx->maj_stat = p_AcquireCredentialsHandleA(NULL,
+ "Kerberos",
+ SECPKG_CRED_OUTBOUND,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ &winctx->cred_handle,
+ &winctx->expiry);
+
+ if (winctx->maj_stat != SEC_E_OK) return SSH_GSS_FAILURE;
+
+ *ctx = (Ssh_gss_ctx) winctx;
+ return SSH_GSS_OK;
+}
+
+
+Ssh_gss_stat ssh_gss_init_sec_context(Ssh_gss_ctx *ctx,
+ Ssh_gss_name srv_name,
+ int to_deleg,
+ Ssh_gss_buf *recv_tok,
+ Ssh_gss_buf *send_tok)
+{
+ winSsh_gss_ctx *winctx = (winSsh_gss_ctx *) *ctx;
+ SecBuffer wsend_tok = {send_tok->len,SECBUFFER_TOKEN,send_tok->data};
+ SecBuffer wrecv_tok = {recv_tok->len,SECBUFFER_TOKEN,recv_tok->data};
+ SecBufferDesc output_desc={SECBUFFER_VERSION,1,&wsend_tok};
+ SecBufferDesc input_desc ={SECBUFFER_VERSION,1,&wrecv_tok};
+ unsigned long flags=ISC_REQ_MUTUAL_AUTH|ISC_REQ_REPLAY_DETECT|
+ ISC_REQ_CONFIDENTIALITY|ISC_REQ_ALLOCATE_MEMORY;
+ unsigned long ret_flags=0;
+
+ /* check if we have to delegate ... */
+ if (to_deleg) flags |= ISC_REQ_DELEGATE;
+ winctx->maj_stat = p_InitializeSecurityContextA(&winctx->cred_handle,
+ winctx->context_handle,
+ (char*) srv_name,
+ flags,
+ 0, /* reserved */
+ SECURITY_NATIVE_DREP,
+ &input_desc,
+ 0, /* reserved */
+ &winctx->context,
+ &output_desc,
+ &ret_flags,
+ &winctx->expiry);
+
+ /* prepare for the next round */
+ winctx->context_handle = &winctx->context;
+ send_tok->data = (char*) wsend_tok.pvBuffer;
+ send_tok->len = wsend_tok.cbBuffer;
+
+ /* check & return our status */
+ if (winctx->maj_stat==SEC_E_OK) return SSH_GSS_S_COMPLETE;
+ if (winctx->maj_stat==SEC_I_CONTINUE_NEEDED) return SSH_GSS_S_CONTINUE_NEEDED;
+
+ return SSH_GSS_FAILURE;
+}
+
+Ssh_gss_stat ssh_gss_free_tok(Ssh_gss_buf *send_tok)
+{
+ /* check input */
+ if (send_tok == NULL) return SSH_GSS_FAILURE;
+
+ /* free Windows buffer */
+ p_FreeContextBuffer(send_tok->data);
+ send_tok->len = 0; send_tok->data = NULL;
+
+ return SSH_GSS_OK;
+}
+
+Ssh_gss_stat ssh_gss_release_cred(Ssh_gss_ctx *ctx)
+{
+ winSsh_gss_ctx *winctx= (winSsh_gss_ctx *) *ctx;
+
+ /* check input */
+ if (winctx == NULL) return SSH_GSS_FAILURE;
+
+ /* free Windows data */
+ p_FreeCredentialsHandle(&winctx->cred_handle);
+ p_DeleteSecurityContext(&winctx->context);
+
+ /* delete our "wrapper" structure */
+ sfree(winctx);
+ *ctx = (Ssh_gss_ctx) NULL;
+
+ return SSH_GSS_OK;
+}
+
+
+Ssh_gss_stat ssh_gss_release_name(Ssh_gss_name *srv_name)
+{
+ char *pStr= (char *) *srv_name;
+
+ if (pStr == NULL) return SSH_GSS_FAILURE;
+ sfree(pStr);
+ *srv_name = (Ssh_gss_name) NULL;
+
+ return SSH_GSS_OK;
+}
+
+Ssh_gss_stat ssh_gss_display_status(Ssh_gss_ctx ctx, Ssh_gss_buf *buf)
+{
+ winSsh_gss_ctx *winctx = (winSsh_gss_ctx *) ctx;
+ char *msg;
+
+ if (winctx == NULL) return SSH_GSS_FAILURE;
+
+ /* decode the error code */
+ switch (winctx->maj_stat) {
+ case SEC_E_OK: msg="SSPI status OK"; break;
+ case SEC_E_INVALID_HANDLE: msg="The handle passed to the function"
+ " is invalid.";
+ break;
+ case SEC_E_TARGET_UNKNOWN: msg="The target was not recognized."; break;
+ case SEC_E_LOGON_DENIED: msg="The logon failed."; break;
+ case SEC_E_INTERNAL_ERROR: msg="The Local Security Authority cannot"
+ " be contacted.";
+ break;
+ case SEC_E_NO_CREDENTIALS: msg="No credentials are available in the"
+ " security package.";
+ break;
+ case SEC_E_NO_AUTHENTICATING_AUTHORITY:
+ msg="No authority could be contacted for authentication."
+ "The domain name of the authenticating party could be wrong,"
+ " the domain could be unreachable, or there might have been"
+ " a trust relationship failure.";
+ break;
+ case SEC_E_INSUFFICIENT_MEMORY:
+ msg="One or more of the SecBufferDesc structures passed as"
+ " an OUT parameter has a buffer that is too small.";
+ break;
+ case SEC_E_INVALID_TOKEN:
+ msg="The error is due to a malformed input token, such as a"
+ " token corrupted in transit, a token"
+ " of incorrect size, or a token passed into the wrong"
+ " security package. Passing a token to"
+ " the wrong package can happen if client and server did not"
+ " negotiate the proper security package.";
+ break;
+ default:
+ msg = "Internal SSPI error";
+ break;
+ }
+
+ buf->data = dupstr(msg);
+ buf->len = strlen(buf->data);
+
+ return SSH_GSS_OK;
+}
+
+Ssh_gss_stat ssh_gss_get_mic(Ssh_gss_ctx ctx, Ssh_gss_buf *buf,
+ Ssh_gss_buf *hash)
+{
+ winSsh_gss_ctx *winctx= (winSsh_gss_ctx *) ctx;
+ SecPkgContext_Sizes ContextSizes;
+ SecBufferDesc InputBufferDescriptor;
+ SecBuffer InputSecurityToken[2];
+
+ if (winctx == NULL) return SSH_GSS_FAILURE;
+
+ winctx->maj_stat = 0;
+
+ memset(&ContextSizes, 0, sizeof(ContextSizes));
+
+ winctx->maj_stat = p_QueryContextAttributesA(&winctx->context,
+ SECPKG_ATTR_SIZES,
+ &ContextSizes);
+
+ if (winctx->maj_stat != SEC_E_OK ||
+ ContextSizes.cbMaxSignature == 0)
+ return winctx->maj_stat;
+
+ InputBufferDescriptor.cBuffers = 2;
+ InputBufferDescriptor.pBuffers = InputSecurityToken;
+ InputBufferDescriptor.ulVersion = SECBUFFER_VERSION;
+ InputSecurityToken[0].BufferType = SECBUFFER_DATA;
+ InputSecurityToken[0].cbBuffer = buf->len;
+ InputSecurityToken[0].pvBuffer = buf->data;
+ InputSecurityToken[1].BufferType = SECBUFFER_TOKEN;
+ InputSecurityToken[1].cbBuffer = ContextSizes.cbMaxSignature;
+ InputSecurityToken[1].pvBuffer = snewn(ContextSizes.cbMaxSignature, char);
+
+ winctx->maj_stat = p_MakeSignature(&winctx->context,
+ 0,
+ &InputBufferDescriptor,
+ 0);
+
+ if (winctx->maj_stat == SEC_E_OK) {
+ hash->len = InputSecurityToken[1].cbBuffer;
+ hash->data = InputSecurityToken[1].pvBuffer;
+ }
+
+ return winctx->maj_stat;
+}
+
+Ssh_gss_stat ssh_gss_free_mic(Ssh_gss_buf *hash)
+{
+ sfree(hash->data);
+ return SSH_GSS_OK;
+}
+
+#else
+
+/* Dummy function so this source file defines something if NO_GSSAPI
+ is defined. */
+
+int ssh_gss_init(void)
+{
+ return 0;
+}
+
+#endif
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