Merge pull request #36 from Nitrokey/issue_31-secret_as_hex

#31 pass secret to OTP as hex (breaking change - previously any string was accepted)

2 files changed, 44 insertions, 1 deletions

diff --git a/include/LibraryException.h b/include/LibraryException.h
index 5036320..72891fb 100644
--- a/include/LibraryException.h
+++ b/include/LibraryException.h
@@ -12,6 +12,47 @@ public:
 
 
 
+class TargetBufferSmallerThanSource: public LibraryException {
+public:
+    virtual uint8_t exception_id() override {
+        return 203;
+    }
+
+public:
+    size_t source_size;
+    size_t target_size;
+
+    TargetBufferSmallerThanSource(
+            size_t source_size, size_t target_size
+            ) : source_size(source_size),  target_size(target_size) {}
+
+    virtual const char *what() const throw() override {
+        std::string s = " ";
+        auto ts = [](int x){ return std::to_string(x); };
+        std::string msg = std::string("Target buffer size is smaller than source: [source size, buffer size]")
+            +s+ ts(source_size) +s+ ts(target_size);
+        return msg.c_str();
+    }
+
+};
+
+class InvalidHexString : public LibraryException {
+public:
+    virtual uint8_t exception_id() override {
+        return 202;
+    }
+
+public:
+    uint8_t invalid_char;
+
+    InvalidHexString (uint8_t invalid_char) : invalid_char( invalid_char) {}
+
+    virtual const char *what() const throw() override {
+        return "Invalid character in hex string";
+    }
+
+};
+
 class InvalidSlotException : public LibraryException {
 public:
     virtual uint8_t exception_id() override {
diff --git a/include/misc.h b/include/misc.h
index cccd830..5fcd16d 100644
--- a/include/misc.h
+++ b/include/misc.h
@@ -2,6 +2,7 @@
 #define MISC_H
 #include <stdio.h>
 #include <string>
+#include <vector>
 
 namespace nitrokey {
 namespace misc {
@@ -16,7 +17,8 @@ typename T::CommandPayload get_payload(){
 
 
     std::string hexdump(const char *p, size_t size, bool print_header=true);
-uint32_t stm_crc32(const uint8_t *data, size_t size);
+    uint32_t stm_crc32(const uint8_t *data, size_t size);
+    std::vector<uint8_t> hex_string_to_byte(const char* hexString);
 }
 }