Move cmd functions to separate files.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

src/openpgp/cmd_put_data.c

@@ -0,0 +1,74 @@
+/*
+ * This file is part of the Pico OpenPGP distribution (https://github.com/polhenarejos/pico-openpgp).
+ * Copyright (c) 2022 Pol Henarejos.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "openpgp.h"
+
+int cmd_put_data() {
+    uint16_t fid = (P1(apdu) << 8) | P2(apdu);
+    file_t *ef;
+    if (fid == EF_RESET_CODE) {
+        fid = EF_RC;
+    }
+    else if (fid == EF_ALGO_SIG || fid == EF_ALGO_DEC || fid == EF_ALGO_AUT) {
+        fid |= 0x1000;
+    }
+    if (!(ef = search_by_fid(fid, NULL, SPECIFY_EF))) {
+        return SW_REFERENCE_NOT_FOUND();
+    }
+    if (!authenticate_action(ef, ACL_OP_UPDATE_ERASE)) {
+        return SW_SECURITY_STATUS_NOT_SATISFIED();
+    }
+    if (fid == EF_PW_STATUS) {
+        fid = EF_PW_PRIV;
+        apdu.nc = 4; //we silently ommit the reset parameters
+    }
+    if (currentEF && (currentEF->fid & 0x1FF0) == (fid & 0x1FF0)) { //previously selected
+        ef = currentEF;
+    }
+    if (apdu.nc > 0 && (ef->type & FILE_DATA_FLASH)) {
+        int r = 0;
+        if (fid == EF_RC) {
+            has_rc = false;
+            if ((r = load_dek()) != PICOKEY_OK) {
+                return SW_EXEC_ERROR();
+            }
+            uint8_t dhash[33];
+            dhash[0] = apdu.nc;
+            double_hash_pin(apdu.data, apdu.nc, dhash + 1);
+            r = file_put_data(ef, dhash, sizeof(dhash));
+
+            file_t *tf = search_by_fid(EF_DEK, NULL, SPECIFY_EF);
+            if (!tf) {
+                return SW_REFERENCE_NOT_FOUND();
+            }
+            uint8_t def[IV_SIZE + 32 + 32 + 32 + 32];
+            memcpy(def, file_get_data(tf), file_get_size(tf));
+            hash_multi(apdu.data, apdu.nc, session_rc);
+            memcpy(def + IV_SIZE + 32, dek + IV_SIZE, 32);
+            aes_encrypt_cfb_256(session_rc, def, def + IV_SIZE + 32, 32);
+            r = file_put_data(tf, def, sizeof(def));
+        }
+        else {
+            r = file_put_data(ef, apdu.data, apdu.nc);
+        }
+        if (r != PICOKEY_OK) {
+            return SW_MEMORY_FAILURE();
+        }
+        low_flash_available();
+    }
+    return SW_OK();
+}