Dactyloidae iOS initial commit

mobile/ios/ThirdParty/ecec/include/ece/trailer.h

@@ -0,0 +1,31 @@
+#ifndef ECE_TRAILER_H
+#define ECE_TRAILER_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+typedef bool (*needs_trailer_t)(uint32_t rs, size_t ciphertextLen);
+
+// Adjusts the aesgcm record size to account for the authentication tag.
+// aesgcm includes the size of the padding delimiter, but not the tag.
+uint32_t
+ece_aesgcm_rs(uint32_t rs);
+
+// Indicates if an "aesgcm" ciphertext is a multiple of the record size, and
+// needs a padding-only trailing block to prevent truncation attacks.
+bool
+ece_aesgcm_needs_trailer(uint32_t rs, size_t ciphertextLen);
+
+// Provided for completeness, but always returns false because "aes128gcm" uses
+// a padding scheme that doesn't need a trailer.
+bool
+ece_aes128gcm_needs_trailer(uint32_t rs, size_t ciphertextLen);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* ECE_TRAILER_H */