tyler.durden/Win32-OpenSSH
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5-3 c4

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This commit is contained in:
manojampalam 2016-05-03 22:43:28 -07:00
parent 42e4efae28
commit 61554ba7a9
1 changed files with 71 additions and 7 deletions
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78
contrib/win32/win32compat/ssh-agent/agent-request.c
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@ -31,6 +31,7 @@
#include "agent.h"
#include "agent-request.h"
#include <sddl.h>
#define MAX_KEY_LENGTH 255
#define MAX_VALUE_NAME 16383
@ -47,31 +48,84 @@ get_user_root(struct agent_connection* con, HKEY *root){
return r;
}
static int
convert_blob(struct agent_connection* con, char *blob, DWORD blen, char **eblob, DWORD *eblen, int encrypt) {
int r = 0;
DATA_BLOB in, out;
if (ImpersonateNamedPipeClient(con->connection) == FALSE)
return ERROR_INTERNAL_ERROR;
in.cbData = blen;
in.pbData = blob;
out.cbData = 0;
out.pbData = NULL;
if (encrypt) {
if (!CryptProtectData(&in, NULL, NULL, 0, NULL, 0, &out)) {
r = GetLastError();
goto done;
}
}
else {
if (!CryptUnprotectData(&in, NULL, NULL, 0, NULL, 0, &out)) {
r = GetLastError();
goto done;
}
}
*eblob = malloc(out.cbData);
if (*eblob == NULL) {
r = ERROR_OUTOFMEMORY;
goto done;
}
memcpy(*eblob, out.pbData, out.cbData);
*eblen = out.cbData;
done:
if (out.cbData)
LocalFree(out.cbData);
RevertToSelf();
return r;
}
int
process_add_identity(struct sshbuf* request, struct sshbuf* response, struct agent_connection* con) {
struct sshkey* key = NULL;
int r = 0, r1 = 0, blob_len;
int r = 0, r1 = 0, blob_len, eblob_len;
size_t comment_len, pubkey_blob_len;
u_char *pubkey_blob = NULL;
char *thumbprint = NULL, *comment;
const char *blob;
char* eblob = NULL;
HKEY reg = 0, sub = 0, user_root = 0;
PSECURITY_DESCRIPTOR sd = NULL;
wchar_t* str = L"O:SYG:BAD:P(A;;GA;;;SY)";
SECURITY_ATTRIBUTES sa;
ConvertStringSecurityDescriptorToSecurityDescriptorW(str, SDDL_REVISION_1, &sd, NULL);
sa.nLength = sizeof(sa);
sa.lpSecurityDescriptor = sd;
sa.bInheritHandle = FALSE;
blob = sshbuf_ptr(request);
if ((r = sshkey_private_deserialize(request, &key)) != 0)
goto done;
blob_len = (sshbuf_ptr(request) - blob) & 0xffffffff;
if ((r = sshkey_to_blob(key, &pubkey_blob, &pubkey_blob_len)) != 0) {
if ((r = sshkey_to_blob(key, &pubkey_blob, &pubkey_blob_len)) != 0)
goto done;
if ((r = convert_blob(con, blob, blob_len, &eblob, &eblob_len, 1)) != 0)
goto done;
}
if (((r = sshbuf_peek_string_direct(request, &comment, &comment_len)) != 0) ||
((thumbprint = sshkey_fingerprint(key, SSH_FP_HASH_DEFAULT, SSH_FP_DEFAULT)) == NULL) ||
((r = get_user_root(con, &user_root)) != 0) ||
((r = RegCreateKeyExW(user_root, SSHD_KEYS_ROOT, 0, 0, 0, KEY_WRITE, NULL, &reg, NULL)) != 0) ||
((r = RegCreateKeyExA(reg, thumbprint, 0, 0, 0, KEY_WRITE, NULL, &sub, NULL)) != 0) ||
((r = RegSetValueExW(sub, NULL, 0, REG_BINARY, blob, blob_len)) != 0) ||
((r = RegSetValueExW(sub, NULL, 0, REG_BINARY, eblob, eblob_len)) != 0) ||
((r = RegSetValueExW(sub, L"pub", 0, REG_BINARY, pubkey_blob, pubkey_blob_len)) != 0) ||
((r = RegSetValueExW(sub, L"type", 0, REG_DWORD, (BYTE*)&key->type, 4)) != 0) ||
((r = RegSetValueExW(sub, L"comment", 0, REG_BINARY, comment, comment_len)) != 0) )
@ -83,6 +137,10 @@ done:
r1 = sshbuf_put_u8(response, (r==0) ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE);
if (eblob)
free(eblob);
if (sd)
LocalFree(sd);
if (key)
sshkey_free(key);
if (thumbprint)
@ -104,8 +162,9 @@ static int sign_blob(const struct sshkey *pubkey, u_char ** sig, size_t *siglen,
int r = 0;
struct sshkey* prikey = NULL;
char *thumbprint = NULL, *regdata = NULL;
DWORD regdatalen = 0;
struct sshbuf* tmpbuf;
DWORD regdatalen = 0, keyblob_len = 0;;
struct sshbuf* tmpbuf = NULL;
char *keyblob = NULL;
regdata = malloc(4);
regdatalen = 4;
@ -140,7 +199,10 @@ static int sign_blob(const struct sshkey *pubkey, u_char ** sig, size_t *siglen,
if ((r = RegQueryValueExW(sub, NULL, 0, NULL, regdata, &regdatalen)) != 0)
goto done;
if ((tmpbuf = sshbuf_from(regdata, regdatalen)) == NULL) {
if ((r = convert_blob(con, regdata, regdatalen, &keyblob, &keyblob_len, FALSE)) != 0)
goto done;
if ((tmpbuf = sshbuf_from(keyblob, keyblob_len)) == NULL) {
r = ENOMEM;
goto done;
}
@ -150,6 +212,8 @@ static int sign_blob(const struct sshkey *pubkey, u_char ** sig, size_t *siglen,
goto done;
done:
if (keyblob)
free(keyblob);
if (regdata)
free(regdata);
if (tmpbuf)