Refactor code structure for improved readability and maintainability

CMakeLists.txt

@@ -0,0 +1,60 @@
+cmake_minimum_required(VERSION 3.5)
+
+set(SOURCES_C
+  libsrtp/srtp/srtp.c
+)
+
+set(CIPHERS_SOURCES_C
+  libsrtp/crypto/cipher/cipher.c
+  libsrtp/crypto/cipher/null_cipher.c
+)
+
+list(APPEND CIPHERS_SOURCES_C
+  libsrtp/crypto/cipher/aes_icm_mbedtls.c
+  libsrtp/crypto/cipher/aes_gcm_mbedtls.c
+  libsrtp/crypto/cipher/cipher_test_cases.c
+)
+
+set(HASHES_SOURCES_C
+    libsrtp/crypto/hash/auth.c
+    libsrtp/crypto/hash/null_auth.c
+)
+
+list(APPEND HASHES_SOURCES_C
+  libsrtp/crypto/hash/hmac_mbedtls.c
+  libsrtp/crypto/hash/auth_test_cases.c
+)
+
+set(KERNEL_SOURCES_C
+  libsrtp/crypto/kernel/alloc.c
+  libsrtp/crypto/kernel/crypto_kernel.c
+  libsrtp/crypto/kernel/err.c
+  libsrtp/crypto/kernel/key.c
+)
+
+set(MATH_SOURCES_C
+  libsrtp/crypto/math/datatypes.c
+)
+
+set(REPLAY_SOURCES_C
+  libsrtp/crypto/replay/rdb.c
+  libsrtp/crypto/replay/rdbx.c
+)
+
+set(SRTP_SRCS
+  ${SOURCES_C}
+  ${CIPHERS_SOURCES_C}
+  ${HASHES_SOURCES_C}
+  ${KERNEL_SOURCES_C}
+  ${MATH_SOURCES_C}
+  ${REPLAY_SOURCES_C}
+)
+
+set(SRTP_INCLUDE_DIRS
+	esp-port
+	libsrtp/include
+	libsrtp/crypto/include
+)
+
+idf_component_register(SRCS ${SRTP_SRCS} INCLUDE_DIRS ${SRTP_INCLUDE_DIRS} REQUIRES mbedtls)
+target_compile_definitions(${COMPONENT_LIB} PUBLIC "-DHAVE_CONFIG_H" "-DGCM" "-DMBEDTLS")