Splitting cmd_xxx() functions in separate files.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
2022-08-13 14:59:27 +02:00
parent 87feed1222
commit e6f082d512
30 changed files with 2703 additions and 2004 deletions
--- a/src/hsm/cmd_read_binary.c
+++ b/src/hsm/cmd_read_binary.c
@@ -0,0 +1,90 @@
+/* 
+ * This file is part of the Pico HSM distribution (https://github.com/polhenarejos/pico-hsm).
+ * 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 "sc_hsm.h"
+
+int cmd_read_binary() {
+    uint16_t fid = 0x0;
+    uint32_t offset = 0;
+    uint8_t ins = INS(apdu), p1 = P1(apdu), p2 = P2(apdu);
+    const file_t *ef = NULL;
+    
+    if ((ins & 0x1) == 0)
+    {
+        if ((p1 & 0x80) != 0) {
+            if (!(ef = search_by_fid(p1&0x1f, NULL, SPECIFY_EF)))
+                return SW_FILE_NOT_FOUND ();
+            offset = p2;
+        }
+        else {
+            offset = make_uint16_t(p1, p2) & 0x7fff;
+            ef = currentEF;
+        }
+    }
+    else {
+        if (p1 == 0 && (p2 & 0xE0) == 0 && (p2 & 0x1f) != 0 && (p2 & 0x1f) != 0x1f) {
+            if (!(ef = search_by_fid(p2&0x1f, NULL, SPECIFY_EF)))
+                return SW_FILE_NOT_FOUND ();
+        } 
+        else {
+            uint16_t file_id = make_uint16_t(p1, p2); // & 0x7fff;
+            if (file_id == 0x0)
+                ef = currentEF;
+            else if (!(ef = search_by_fid(file_id, NULL, SPECIFY_EF)) && !(ef = search_dynamic_file(file_id)))
+                return SW_FILE_NOT_FOUND ();
+            
+            if (apdu.data[0] != 0x54)
+                return SW_WRONG_DATA();
+                
+            offset = 0;
+            for (int d = 0; d < apdu.data[1]; d++)
+                offset |= apdu.data[2+d]<<(apdu.data[1]-1-d)*8;
+        }        
+    }
+    
+    if ((fid >> 8) == KEY_PREFIX || !authenticate_action(ef, ACL_OP_READ_SEARCH)) {
+        return SW_SECURITY_STATUS_NOT_SATISFIED();
+    }
+    if (ef->data) {
+        if ((ef->type & FILE_DATA_FUNC) == FILE_DATA_FUNC) {
+            uint16_t data_len = ((int (*)(const file_t *, int))(ef->data))((const file_t *)ef, 1); //already copies content to res_APDU
+            if (offset > data_len)
+                return SW_WRONG_P1P2();
+            uint16_t maxle = data_len-offset;
+            if (apdu.ne > maxle)
+                apdu.ne = maxle;
+            if (offset) {
+                memmove(res_APDU, res_APDU+offset, res_APDU_size-offset);
+                //res_APDU += offset;
+                res_APDU_size -= offset;
+            }
+        }
+        else {
+            uint16_t data_len = file_get_size(ef);
+            if (offset > data_len)
+                return SW_WRONG_P1P2();
+        
+            uint16_t maxle = data_len-offset;
+            if (apdu.ne > maxle)
+                apdu.ne = maxle;
+            memcpy(res_APDU, file_get_data(ef)+offset, data_len-offset);
+            res_APDU_size = data_len-offset;
+        }
+    }
+
+    return SW_OK();
+}