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authorLibravatar vnugent <public@vaughnnugent.com>2024-03-03 14:59:25 -0500
committerLibravatar vnugent <public@vaughnnugent.com>2024-03-03 14:59:25 -0500
commit490dfee4ef22479009627435c6ad728c3cbbab54 (patch)
treeb081f9ccae15037372bfd906767247bbd58c2907 /tests/hex.h
parentefa97490b7ed47f4e2f05bee52e2b33e14e439e6 (diff)
test: #3 tests for encryption/description and Macs
Diffstat (limited to 'tests/hex.h')
-rw-r--r--tests/hex.h148
1 files changed, 148 insertions, 0 deletions
diff --git a/tests/hex.h b/tests/hex.h
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+++ b/tests/hex.h
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+/*
+* Copyright (c) 2024 Vaughn Nugent
+*
+* Package: noscrypt
+* File: hex.h
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public License
+* as published by the Free Software Foundation; either version 2.1
+* of the License, or (at your option) any later version.
+*
+* This library 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
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public License
+* along with NativeHeapApi. If not, see http://www.gnu.org/licenses/.
+*/
+
+
+#ifndef HEX_HELPERS_H
+#define HEX_HELPERS_H
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
+ #include <assert.h>
+ #define STATIC_ASSERT(x, m) static_assert(x, m)
+#else
+ #define STATIC_ASSERT(x, m)
+ #pragma message("Static assertions are not supported by this language version")
+#endif
+
+typedef struct hexBytes
+{
+ uint8_t* data;
+ size_t length;
+} HexBytes;
+
+/* Deferred list of HexBytes to be freed on exit */
+static HexBytes* _hdeferList[10];
+static size_t _hdeferListIndex = 0;
+
+/*
+ Allocates a HexBytes and decodes the hexadecimal string into it's binary
+ representation. The string must be a valid hexadecimal string and the length
+ and may not be NULL. The length may be known at compile time and can be used
+ to assert the length of the string literal.
+ @param hexLiteral The hexadecimal string to decode
+ @param strLen The length of the string
+*/
+#define FromHexString(str, len) _fromHexString(str, sizeof(str) - 1); STATIC_ASSERT(sizeof(str)/2 == len && len > 0, "Invalid length hex string literal");
+
+static HexBytes* __allocHexBytes(size_t length)
+{
+ length /= 2;
+
+ HexBytes* hexBytes = (HexBytes*)malloc(length + sizeof(HexBytes));
+ if(!hexBytes)
+ {
+ return NULL;
+ }
+
+ hexBytes->length = length;
+ /* data starts after the structure size */
+ hexBytes-> data = ((uint8_t*)hexBytes) + sizeof(HexBytes);
+ /* add new value to deferred cleanup list */
+ _hdeferList[_hdeferListIndex++] = hexBytes;
+ return hexBytes;
+}
+
+static HexBytes* _fromHexString(const char* hexLiteral, size_t strLen)
+{
+ HexBytes* hexBytes;
+ size_t i;
+
+ if(!hexLiteral)
+ {
+ return NULL;
+ }
+
+ /* alloc the raw bytes */
+ hexBytes = __allocHexBytes(strLen);
+
+ /* read every 2 chars into */
+ for (i = 0; i < strLen; i += 2)
+ {
+ /* slice string into smaller 2 char strings then parse */
+ char byteString[3] = { hexLiteral[i], hexLiteral[i + 1], '\0'};
+ hexBytes->data[i / 2] = (uint8_t)strtol(byteString, NULL, 16);
+ }
+
+ return hexBytes;
+}
+
+/*
+ Frees all the HexBytes that were allocated by the
+ FromHexString function. To be called at the end of
+ the program.
+*/
+static void FreeHexBytes(void)
+{
+ while(_hdeferListIndex > 0)
+ {
+ free(_hdeferList[--_hdeferListIndex]);
+ _hdeferList[_hdeferListIndex] = NULL;
+ }
+}
+
+/*
+* Prints the value of the buffer as a hexadecimal string
+* @param bytes The buffer to print
+* @param len The length of the buffer
+*/
+static void PrintHexRaw(void* bytes, size_t len)
+{
+ size_t i;
+ for (i = 0; i < len; i++)
+ {
+ printf("%02x", ((uint8_t*)bytes)[i]);
+ }
+
+ puts("\n");
+}
+
+/*
+* Prints the value of the HexBytes as a hexadecimal string
+* @param hexBytes A pointer to the HexBytes structure to print the value of
+*/
+static void PrintHexBytes(HexBytes* hexBytes)
+{
+ if (!hexBytes)
+ {
+ puts("NULL");
+ }
+ else
+ {
+ PrintHexRaw(hexBytes->data, hexBytes->length);
+ }
+}
+
+
+#endif // !HEX_HELPERS_H
+
+