Add decode_wkssvc_join_password_buffer().

Guenther
(This used to be commit ba2a544baf1e1cc3652512ed5df2bb408fa8bdfd)

diff --git a/source3/libsmb/smbencrypt.c b/source3/libsmb/smbencrypt.c
index 6060669e496a9a0d680a4da31188ba31af6ca212..8793fdcb55ef9b8fd5fa200fdbee9ddb06f44406 100644 (file)
--- a/source3/libsmb/smbencrypt.c
+++ b/source3/libsmb/smbencrypt.c
@@ -730,3 +730,32 @@ void encode_wkssvc_join_password_buffer(TALLOC_CTX *mem_ctx,
 
        data_blob_free(&confounded_session_key);
 }
+
+void decode_wkssvc_join_password_buffer(TALLOC_CTX *mem_ctx,
+                                       struct wkssvc_PasswordBuffer *pwd_buf,
+                                       DATA_BLOB *session_key,
+                                       char **pwd)
+{
+       uint8_t buffer[516];
+       struct MD5Context ctx;
+       uint32_t pwd_len;
+
+       DATA_BLOB confounded_session_key = data_blob_talloc(mem_ctx, NULL, 16);
+
+       int confounder_len = 8;
+       uint8_t confounder[8];
+
+       memcpy(&confounder, &pwd_buf->data[0], confounder_len);
+       memcpy(&buffer, &pwd_buf->data[8], 516);
+
+       MD5Init(&ctx);
+       MD5Update(&ctx, session_key->data, session_key->length);
+       MD5Update(&ctx, confounder, confounder_len);
+       MD5Final(confounded_session_key.data, &ctx);
+
+       SamOEMhashBlob(buffer, 516, &confounded_session_key);
+
+       decode_pw_buffer(mem_ctx, buffer, pwd, &pwd_len, STR_UNICODE);
+
+       data_blob_free(&confounded_session_key);
+}