1 files changed, 170 insertions, 0 deletions
diff --git a/libs/libsodium/src/include/sodium/utils.h b/libs/libsodium/src/include/sodium/utils.h
new file mode 100644
index 0000000000..46eb331cfd
--- /dev/null
+++ b/libs/libsodium/src/include/sodium/utils.h
@@ -0,0 +1,170 @@
+
+#ifndef sodium_utils_H
+#define sodium_utils_H
+
+#include <stddef.h>
+
+#include "export.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef SODIUM_C99
+# if defined(__cplusplus) || !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L
+#  define SODIUM_C99(X)
+# else
+#  define SODIUM_C99(X) X
+# endif
+#endif
+
+SODIUM_EXPORT
+void sodium_memzero(void * const pnt, const size_t len);
+
+SODIUM_EXPORT
+void sodium_stackzero(const size_t len);
+
+/*
+ * WARNING: sodium_memcmp() must be used to verify if two secret keys
+ * are equal, in constant time.
+ * It returns 0 if the keys are equal, and -1 if they differ.
+ * This function is not designed for lexicographical comparisons.
+ */
+SODIUM_EXPORT
+int sodium_memcmp(const void * const b1_, const void * const b2_, size_t len)
+            __attribute__ ((warn_unused_result));
+
+/*
+ * sodium_compare() returns -1 if b1_ < b2_, 1 if b1_ > b2_ and 0 if b1_ == b2_
+ * It is suitable for lexicographical comparisons, or to compare nonces
+ * and counters stored in little-endian format.
+ * However, it is slower than sodium_memcmp().
+ */
+SODIUM_EXPORT
+int sodium_compare(const unsigned char *b1_, const unsigned char *b2_,
+                   size_t len)
+            __attribute__ ((warn_unused_result));
+
+SODIUM_EXPORT
+int sodium_is_zero(const unsigned char *n, const size_t nlen);
+
+SODIUM_EXPORT
+void sodium_increment(unsigned char *n, const size_t nlen);
+
+SODIUM_EXPORT
+void sodium_add(unsigned char *a, const unsigned char *b, const size_t len);
+
+SODIUM_EXPORT
+char *sodium_bin2hex(char * const hex, const size_t hex_maxlen,
+                     const unsigned char * const bin, const size_t bin_len);
+
+SODIUM_EXPORT
+int sodium_hex2bin(unsigned char * const bin, const size_t bin_maxlen,
+                   const char * const hex, const size_t hex_len,
+                   const char * const ignore, size_t * const bin_len,
+                   const char ** const hex_end);
+
+#define sodium_base64_VARIANT_ORIGINAL            1
+#define sodium_base64_VARIANT_ORIGINAL_NO_PADDING 3
+#define sodium_base64_VARIANT_URLSAFE             5
+#define sodium_base64_VARIANT_URLSAFE_NO_PADDING  7
+
+/*
+ * Computes the required length to encode BIN_LEN bytes as a base64 string
+ * using the given variant. The computed length includes a trailing \0.
+ */
+#define sodium_base64_ENCODED_LEN(BIN_LEN, VARIANT) \
+    (((BIN_LEN) / 3U) * 4U + \
+    ((((BIN_LEN) - ((BIN_LEN) / 3U) * 3U) | (((BIN_LEN) - ((BIN_LEN) / 3U) * 3U) >> 1)) & 1U) * \
+     (4U - (~((((VARIANT) & 2U) >> 1) - 1U) & (3U - ((BIN_LEN) - ((BIN_LEN) / 3U) * 3U)))) + 1U)
+
+SODIUM_EXPORT
+size_t sodium_base64_encoded_len(const size_t bin_len, const int variant);
+
+SODIUM_EXPORT
+char *sodium_bin2base64(char * const b64, const size_t b64_maxlen,
+                        const unsigned char * const bin, const size_t bin_len,
+                        const int variant);
+
+SODIUM_EXPORT
+int sodium_base642bin(unsigned char * const bin, const size_t bin_maxlen,
+                      const char * const b64, const size_t b64_len,
+                      const char * const ignore, size_t * const bin_len,
+                      const char ** const b64_end, const int variant);
+
+SODIUM_EXPORT
+int sodium_mlock(void * const addr, const size_t len);
+
+SODIUM_EXPORT
+int sodium_munlock(void * const addr, const size_t len);
+
+/* WARNING: sodium_malloc() and sodium_allocarray() are not general-purpose
+ * allocation functions.
+ *
+ * They return a pointer to a region filled with 0xd0 bytes, immediately
+ * followed by a guard page.
+ * As a result, accessing a single byte after the requested allocation size
+ * will intentionally trigger a segmentation fault.
+ *
+ * A canary and an additional guard page placed before the beginning of the
+ * region may also kill the process if a buffer underflow is detected.
+ *
+ * The memory layout is:
+ * [unprotected region size (read only)][guard page (no access)][unprotected pages (read/write)][guard page (no access)]
+ * With the layout of the unprotected pages being:
+ * [optional padding][16-bytes canary][user region]
+ *
+ * However:
+ * - These functions are significantly slower than standard functions
+ * - Each allocation requires 3 or 4 additional pages
+ * - The returned address will not be aligned if the allocation size is not
+ *   a multiple of the required alignment. For this reason, these functions
+ *   are designed to store data, such as secret keys and messages.
+ *
+ * sodium_malloc() can be used to allocate any libsodium data structure.
+ *
+ * The crypto_generichash_state structure is packed and its length is
+ * either 357 or 361 bytes. For this reason, when using sodium_malloc() to
+ * allocate a crypto_generichash_state structure, padding must be added in
+ * order to ensure proper alignment. crypto_generichash_statebytes()
+ * returns the rounded up structure size, and should be prefered to sizeof():
+ * state = sodium_malloc(crypto_generichash_statebytes());
+ */
+
+SODIUM_EXPORT
+void *sodium_malloc(const size_t size)
+            __attribute__ ((malloc));
+
+SODIUM_EXPORT
+void *sodium_allocarray(size_t count, size_t size)
+            __attribute__ ((malloc));
+
+SODIUM_EXPORT
+void sodium_free(void *ptr);
+
+SODIUM_EXPORT
+int sodium_mprotect_noaccess(void *ptr);
+
+SODIUM_EXPORT
+int sodium_mprotect_readonly(void *ptr);
+
+SODIUM_EXPORT
+int sodium_mprotect_readwrite(void *ptr);
+
+SODIUM_EXPORT
+int sodium_pad(size_t *padded_buflen_p, unsigned char *buf,
+               size_t unpadded_buflen, size_t blocksize, size_t max_buflen);
+
+SODIUM_EXPORT
+int sodium_unpad(size_t *unpadded_buflen_p, const unsigned char *buf,
+                 size_t padded_buflen, size_t blocksize);
+
+/* -------- */
+
+int _sodium_alloc_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif