added webrdp public code

1 files changed, 115 insertions, 0 deletions

diff --git a/src/core/utilities.c b/src/core/utilities.c
new file mode 100644
index 0000000..969e36b
--- /dev/null
+++ b/src/core/utilities.c
@@ -0,0 +1,115 @@
+/* BSD-2-Clause license
+ * 
+ * Copyright (c) 2018-2023 NST <www.newinfosec.ru>, sss <sss at dark-alexandr dot net>. 
+ * 
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/stat.h>
+
+#include <openssl/bio.h>
+#include <openssl/buffer.h>
+#include <openssl/evp.h>
+
+#include <openssl/sha.h>
+
+bool
+is_regular_file(const char *path)
+{
+	struct stat path_stat;
+	stat(path, &path_stat);
+	return S_ISREG(path_stat.st_mode);
+}
+
+bool
+is_directory(const char *path)
+{
+	struct stat path_stat;
+	stat(path, &path_stat);
+	return S_ISDIR(path_stat.st_mode);
+}
+
+bool
+sha1(uint8_t *dst, const uint8_t *src, size_t src_length)
+{
+	SHA_CTX ctx = {0};
+	if (!SHA1_Init(&ctx))
+	{
+		return false;
+	}
+	if (!SHA1_Update(&ctx, src, src_length))
+	{
+		return false;
+	}
+	if (!SHA1_Final(dst, &ctx))
+	{
+		return false;
+	}
+	return true;
+}
+
+void
+hex_print(uint8_t *buf, size_t buf_len)
+{
+	size_t p;
+	for (p = 0; p < buf_len; ++p)
+	{
+		if (!p)
+		{
+			printf("00: ");
+		}
+		if (p && !(p % 8))
+		{
+			printf("| ");
+		}
+		if (p && !(p % 16))
+		{
+			size_t pp = p - 16;
+			for (; pp < p; ++pp)
+			{
+				printf("%c", ((char *)(buf))[pp]);
+			}
+			printf("\n%lx: ", p);
+		}
+		printf("%x ", ((char *)(buf))[p]);
+	}
+}
+
+char
+random_ascii_character()
+{
+	/* use whole ascii table of printable characters */
+	char c;
+get_new_char:
+	c = ((rand() % 94) + 32);
+	while (!c)
+		goto get_new_char;
+	return c;
+}
+
+char *
+random_ascii_string(char *buf, const size_t len)
+{
+	size_t i = 0;
+	if (!buf)
+	{
+		return 0;
+	}
+	for (; i < len; ++i)
+	{
+		buf[i] = random_ascii_character();
+	}
+	buf[len] = 0;
+	return buf;
+}
+
+void
+random_bytes(uint8_t *buf, size_t buf_len)
+{
+	size_t i = 0;
+	for (; i < buf_len; ++i)
+	{
+		buf[i] = rand();
+	}
+}