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manojampalammanojampalam
committed
5-10 C1
1 parent 9347e07 commit 351f141

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2 files changed

+132
-66
lines changed

2 files changed

+132
-66
lines changed

‎contrib/win32/win32compat/ssh-agent/authagent-request.c‎

Lines changed: 131 additions & 62 deletions
Original file line numberDiff line numberDiff line change
@@ -29,74 +29,143 @@
2929
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
3030
*/
3131

32+
#define WIN32_NO_STATUS
3233
#include <Windows.h>
34+
#undef WIN32_NO_STATUS
3335
#include <Ntsecapi.h>
34-
//#include <ntstatus.h>
36+
#include <ntstatus.h>
3537
#include "agent.h"
3638
#include "agent-request.h"
3739

40+
static void
41+
InitLsaString(LSA_STRING *lsa_string, const char *str)
42+
{
43+
if (str == NULL)
44+
memset(lsa_string, 0, sizeof(LSA_STRING));
45+
else {
46+
lsa_string->Buffer = str;
47+
lsa_string->Length = strlen(str);
48+
lsa_string->MaximumLength = lsa_string->Length + 1;
49+
}
50+
}
3851

39-
int process_authagent_request(struct sshbuf* request, struct sshbuf* response, struct agent_connection* con) {
40-
while (1)
41-
{
42-
HANDLE lsa_handle;
43-
PLSA_OPERATIONAL_MODE mode;
44-
ULONG auth_package_id;
45-
NTSTATUS ret;
46-
KERB_S4U_LOGON *s4u_logon;
47-
size_t logon_info_size;
48-
LSA_STRING logon_process_name, auth_package_name, originName;
49-
InitLsaString(&logon_process_name, "ssh-agent");
50-
//InitLsaString(&auth_package_name, MICROSOFT_KERBEROS_NAME_A);
51-
InitLsaString(&auth_package_name, "Negotiate");
52-
InitLsaString(&originName, "sshd");
53-
if (ret = LsaRegisterLogonProcess(&logon_process_name, &lsa_handle, &mode) != STATUS_SUCCESS)
54-
break;
55-
56-
if (ret = LsaLookupAuthenticationPackage(lsa_handle, &auth_package_name, &auth_package_id) != STATUS_SUCCESS)
57-
break;
58-
#define USER_NAME L"user@domain"
59-
logon_info_size = sizeof(KERB_S4U_LOGON);
60-
logon_info_size += (wcslen(USER_NAME) * 2 + 2);
61-
s4u_logon = malloc(logon_info_size);
62-
s4u_logon->MessageType = KerbS4ULogon;
63-
s4u_logon->Flags = 0;
64-
s4u_logon->ClientUpn.Length = wcslen(USER_NAME) * 2;
65-
s4u_logon->ClientUpn.MaximumLength = s4u_logon->ClientUpn.Length;
66-
s4u_logon->ClientUpn.Buffer = (WCHAR*)(s4u_logon + 1);
67-
memcpy(s4u_logon->ClientUpn.Buffer, USER_NAME, s4u_logon->ClientUpn.Length + 2);
68-
s4u_logon->ClientRealm.Length = 0;
69-
s4u_logon->ClientRealm.MaximumLength = 0;
70-
s4u_logon->ClientRealm.Buffer = 0;
71-
72-
TOKEN_SOURCE sourceContext;
73-
RtlCopyMemory(
74-
sourceContext.SourceName,
75-
".Jobs ",
76-
sizeof(sourceContext.SourceName)
77-
);
78-
79-
if (AllocateLocallyUniqueId(&sourceContext.SourceIdentifier) != TRUE)
80-
break;
81-
82-
PKERB_INTERACTIVE_PROFILE pProfile = NULL;
83-
LUID logonId;
84-
QUOTA_LIMITS quotas;
85-
NTSTATUS subStatus;
86-
DWORD cbProfile;
87-
HANDLE hToken = INVALID_HANDLE_VALUE;
88-
if (ret = LsaLogonUser(lsa_handle, &originName, Network, auth_package_id, s4u_logon, logon_info_size, NULL, &sourceContext,
89-
(PVOID*)&pProfile,
90-
&cbProfile,
91-
&logonId,
92-
&hToken,
93-
&quotas,
94-
&subStatus) != STATUS_SUCCESS)
95-
break;
96-
97-
CloseHandle(hToken);
52+
static HANDLE
53+
generate_user_token(wchar_t* user) {
54+
HANDLE lsa_handle = 0, token = 0;;
55+
LSA_OPERATIONAL_MODE mode;
56+
ULONG auth_package_id;
57+
NTSTATUS ret, subStatus;
58+
KERB_S4U_LOGON *s4u_logon = NULL;
59+
size_t logon_info_size;
60+
LSA_STRING logon_process_name, auth_package_name, originName;
61+
TOKEN_SOURCE sourceContext;
62+
PKERB_INTERACTIVE_PROFILE pProfile = NULL;
63+
LUID logonId;
64+
QUOTA_LIMITS quotas;
65+
DWORD cbProfile;
66+
67+
InitLsaString(&logon_process_name, "ssh-agent");
68+
InitLsaString(&auth_package_name, MICROSOFT_KERBEROS_NAME_A);
69+
//InitLsaString(&auth_package_name, "Negotiate");
70+
InitLsaString(&originName, "sshd");
71+
if (ret = LsaRegisterLogonProcess(&logon_process_name, &lsa_handle, &mode) != STATUS_SUCCESS)
72+
goto done;
73+
74+
if (ret = LsaLookupAuthenticationPackage(lsa_handle, &auth_package_name, &auth_package_id) != STATUS_SUCCESS)
75+
goto done;
76+
77+
logon_info_size = sizeof(KERB_S4U_LOGON);
78+
logon_info_size += (wcslen(user) * 2 + 2);
79+
s4u_logon = malloc(logon_info_size);
80+
if (s4u_logon == NULL)
81+
goto done;
82+
83+
s4u_logon->MessageType = KerbS4ULogon;
84+
s4u_logon->Flags = 0;
85+
s4u_logon->ClientUpn.Length = wcslen(user) * 2;
86+
s4u_logon->ClientUpn.MaximumLength = s4u_logon->ClientUpn.Length;
87+
s4u_logon->ClientUpn.Buffer = (WCHAR*)(s4u_logon + 1);
88+
memcpy(s4u_logon->ClientUpn.Buffer, user, s4u_logon->ClientUpn.Length + 2);
89+
s4u_logon->ClientRealm.Length = 0;
90+
s4u_logon->ClientRealm.MaximumLength = 0;
91+
s4u_logon->ClientRealm.Buffer = 0;
92+
93+
memcpy(sourceContext.SourceName,".Jobs ", sizeof(sourceContext.SourceName));
94+
95+
if (AllocateLocallyUniqueId(&sourceContext.SourceIdentifier) != TRUE)
96+
goto done;
97+
98+
if (ret = LsaLogonUser(lsa_handle,
99+
&originName,
100+
Network,
101+
auth_package_id,
102+
s4u_logon,
103+
logon_info_size,
104+
NULL,
105+
&sourceContext,
106+
(PVOID*)&pProfile,
107+
&cbProfile,
108+
&logonId,
109+
&token,
110+
&quotas,
111+
&subStatus) != STATUS_SUCCESS)
112+
goto done;
113+
114+
done:
115+
if (lsa_handle)
98116
LsaDeregisterLogonProcess(lsa_handle);
99-
break;
117+
if (s4u_logon)
118+
free(s4u_logon);
119+
if (pProfile)
120+
LsaFreeReturnBuffer(pProfile);
121+
122+
return token;
123+
}
124+
125+
#define AUTH_REQUEST "keyauthenticate"
126+
#define MAX_USER_NAME_LEN 255 + 255
127+
128+
int process_authagent_request(struct sshbuf* request, struct sshbuf* response, struct agent_connection* con) {
129+
int r = 0;
130+
char* opn, key_blob, user, sig, blob;
131+
size_t opn_len, key_blob_len, user_len, sig_len, blob_len;
132+
struct sshkey *key = NULL;
133+
HANDLE token = NULL, dup_token = NULL;
134+
wchar_t wuser[MAX_USER_NAME_LEN];
135+
PWSTR wuser_home = NULL;
136+
137+
user = NULL;
138+
if ((r = sshbuf_get_string_direct(request, &opn, &opn_len)) != 0 ||
139+
(r = sshbuf_get_string_direct(request, &key_blob, &key_blob_len)) != 0 ||
140+
(r = sshbuf_get_cstring(request, &user, &user_len)) != 0 ||
141+
(r = sshbuf_get_string_direct(request, &sig, &sig_len)) != 0 ||
142+
(r = sshbuf_get_string_direct(request, &blob, &blob_len)) != 0 ||
143+
(r = sshkey_from_blob(key_blob, key_blob_len, &key)) != 0)
144+
goto done;
145+
146+
if ((opn_len != strlen(AUTH_REQUEST)) || (memcmp(opn, AUTH_REQUEST, opn_len) != 0)) {
147+
r = EINVAL;
148+
goto done;
149+
}
150+
151+
if (0 == MultiByteToWideChar(CP_UTF8, 0, user, user_len + 1, wuser, MAX_USER_NAME_LEN) {
152+
r = GetLastError();
153+
goto done;
154+
}
155+
156+
if ((token = generate_user_token(wuser)) == 0) {
157+
r = EINVAL;
158+
goto done;
100159
}
101-
return -1;
160+
161+
done:
162+
if (user)
163+
free(user);
164+
if (key)
165+
sshkey_free(key);
166+
if (token)
167+
CloseHandle(token);
168+
if (wuser_home)
169+
CoTaskMemFree(wuser_home);
170+
return r;
102171
}

‎contrib/win32/win32compat/ssh-agent/keyagent-request.c‎

Lines changed: 1 addition & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -73,9 +73,6 @@ convert_blob(struct agent_connection* con, const char *blob, DWORD blen, char **
7373
}
7474
}
7575

76-
77-
78-
7976
*eblob = malloc(out.cbData);
8077
if (*eblob == NULL) {
8178
r = ERROR_OUTOFMEMORY;
@@ -133,7 +130,7 @@ process_add_identity(struct sshbuf* request, struct sshbuf* response, struct age
133130

134131
done:
135132

136-
/* TODO if r failed the delete reg entries*/
133+
/* TODO if r failed, delete reg entries*/
137134

138135
r1 = sshbuf_put_u8(response, (r==0) ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE);
139136

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