fix(esp_tee): optimise build size by removing unused configs

components/mbedtls/esp_tee/esp_tee_mbedtls.cmake

@@ -31,17 +31,18 @@ include_directories("${COMPONENT_DIR}/port/include")
 # Add PSA driver include directory globally for mbedtls targets
 include_directories("${COMPONENT_DIR}/port/psa_driver/include")
 
-# Import mbedtls library targets
-add_subdirectory(mbedtls)
-
-# Set TF_PSA_CRYPTO_CONFIG_FILE before processing subdirectories to prevent override
+# Set TF_PSA_CRYPTO_USER_CONFIG_FILE before add_subdirectory so that
+# all targets (including extras, platform, utilities) pick it up
 set(
     TF_PSA_CRYPTO_USER_CONFIG_FILE "${COMPONENT_DIR}/esp_tee/esp_tee_mbedtls_config.h"
     CACHE STRING "Path to the PSA Crypto configuration file"
     FORCE
 )
 
-set(mbedtls_targets mbedtls tfpsacrypto builtin mbedx509 everest p256m)
+# Import mbedtls library targets
+add_subdirectory(mbedtls)
+
+set(mbedtls_targets mbedtls tfpsacrypto builtin mbedx509 everest p256-m extras platform utilities)
 
 target_sources(tfpsacrypto PRIVATE "${COMPONENT_DIR}/port/esp_hardware.c")
 
@@ -50,6 +51,7 @@ foreach(target ${mbedtls_targets})
                                     -DMBEDTLS_CONFIG_FILE="${COMPONENT_DIR}/esp_tee/esp_tee_mbedtls_config.h")
     set_config_files_compile_definitions(${target})
     target_compile_definitions(${target} PUBLIC MBEDTLS_MAJOR_VERSION=4)
+    target_compile_definitions(${target} PUBLIC __STDC_WANT_LIB_EXT1__=0)
     if(CONFIG_COMPILER_STATIC_ANALYZER AND CMAKE_C_COMPILER_ID STREQUAL "GNU") # TODO IDF-10087
         target_compile_options(${target} PRIVATE "-fno-analyzer")
     endif()

components/mbedtls/esp_tee/esp_tee_mbedtls_config.h

@@ -48,18 +48,12 @@
 
 #define MBEDTLS_ASN1_WRITE_C
 #define MBEDTLS_ASN1_PARSE_C
-#define MBEDTLS_BIGNUM_C
 #if CONFIG_SECURE_TEE_SEC_STG_SUPPORT_SECP384R1_SIGN
 #define PSA_WANT_ECC_SECP_R1_384 1
-#define MBEDTLS_ECP_DP_SECP384R1_ENABLED
 #else
 #undef PSA_WANT_ECC_SECP_R1_384
-#undef MBEDTLS_ECP_DP_SECP384R1_ENABLED
 #endif
 #define PSA_WANT_ECC_SECP_R1_256 1
-#define MBEDTLS_ECP_DP_SECP256R1_ENABLED
-#define MBEDTLS_ECP_C
-#define MBEDTLS_ECDSA_C
 
 #ifdef CONFIG_MBEDTLS_ECDSA_DETERMINISTIC
 #define PSA_WANT_ALG_DETERMINISTIC_ECDSA 1
@@ -121,47 +115,30 @@
 #undef PSA_WANT_ECC_BRAINPOOL_P_R1_512
 #undef PSA_WANT_ECC_MONTGOMERY_255
 #undef PSA_WANT_ECC_MONTGOMERY_448
-#undef MBEDTLS_ECP_DP_BP256R1_ENABLED
-#undef MBEDTLS_ECP_DP_BP384R1_ENABLED
-#undef MBEDTLS_ECP_DP_BP512R1_ENABLED
-#undef MBEDTLS_ECP_DP_SECP192K1_ENABLED
-#undef MBEDTLS_ECP_DP_SECP224K1_ENABLED
-#undef MBEDTLS_ECP_DP_SECP256K1_ENABLED
-#undef MBEDTLS_ECP_DP_CURVE25519_ENABLED
-#undef MBEDTLS_ECP_DP_CURVE448_ENABLED
 
+/* Disable unused cipher/algorithm types */
 #undef PSA_WANT_KEY_TYPE_ARIA
-#undef MBEDTLS_ARIA_C
 #undef PSA_WANT_KEY_TYPE_CAMELLIA
-#undef MBEDTLS_CAMELLIA_C
 #undef PSA_WANT_KEY_TYPE_DES
-#undef MBEDTLS_DES_C
 #undef PSA_WANT_ALG_RIPEMD160
-#undef MBEDTLS_RIPEMD160_C
 #undef PSA_WANT_ALG_CHACHA20
-#undef MBEDTLS_CHACHA20_C
 #undef PSA_WANT_ALG_CHACHA20_POLY1305
-#undef MBEDTLS_CHACHAPOLY_C
 #undef PSA_WANT_ALG_CCM
 #undef PSA_WANT_ALG_CMAC
 
-#undef MBEDTLS_AES_C
 #define MBEDTLS_AES_ROM_TABLES
 #if SOC_AES_SUPPORTED
 #define MBEDTLS_AES_FEWER_TABLES
 #endif
 
+/* Disable unused hash algorithms */
 #undef PSA_WANT_ALG_MD5
-#undef MBEDTLS_MD5_C
 #undef PSA_WANT_ALG_SHA3_224
-#undef MBEDTLS_SHA3_224_C
 #undef PSA_WANT_ALG_SHA3_256
-#undef MBEDTLS_SHA3_256_C
 #undef PSA_WANT_ALG_SHA3_384
-#undef MBEDTLS_SHA3_384_C
 #undef PSA_WANT_ALG_SHA3_512
-#undef MBEDTLS_SHA3_512_C
 
+/* Disable RSA — not used by TEE */
 #undef PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC
 #undef PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_IMPORT
 #undef PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_EXPORT
@@ -171,16 +148,16 @@
 #undef PSA_WANT_ALG_RSA_PKCS1V15_SIGN
 #undef PSA_WANT_ALG_RSA_OAEP
 #undef PSA_WANT_ALG_RSA_PSS
-#undef MBEDTLS_RSA_C
 
+/* Disable DH key exchange — not used by TEE */
 #undef PSA_WANT_KEY_TYPE_DH_KEY_PAIR_BASIC
 #undef PSA_WANT_KEY_TYPE_DH_KEY_PAIR_IMPORT
 #undef PSA_WANT_KEY_TYPE_DH_KEY_PAIR_EXPORT
 #undef PSA_WANT_KEY_TYPE_DH_KEY_PAIR_GENERATE
 #undef PSA_WANT_KEY_TYPE_DH_PUBLIC_KEY
 #undef PSA_WANT_ALG_FFDH
-#undef MBEDTLS_ECDH_C
 
+/* Disable TLS and other unused modules */
 #undef MBEDTLS_DEBUG_C
 #undef MBEDTLS_PSA_ITS_FILE_C
 #undef MBEDTLS_PSA_CRYPTO_STORAGE_C
@@ -191,5 +168,48 @@
 #undef PSA_WANT_ALG_PBKDF2_HMAC
 #undef PSA_WANT_ALG_PBKDF2_AES_CMAC_PRF_128
 
+/* Disable Diffie-Hellman groups — TEE has no TLS or DH key exchange */
+#undef PSA_WANT_DH_RFC7919_2048
+#undef PSA_WANT_DH_RFC7919_3072
+#undef PSA_WANT_DH_RFC7919_4096
+#undef PSA_WANT_DH_RFC7919_6144
+#undef PSA_WANT_DH_RFC7919_8192
+
+/* Disable key derivation and TLS KDFs not used by TEE */
+#undef PSA_WANT_ALG_HKDF
+#undef PSA_WANT_ALG_HKDF_EXTRACT
+#undef PSA_WANT_ALG_HKDF_EXPAND
+#undef PSA_WANT_ALG_TLS12_PSK_TO_MS
+#undef PSA_WANT_ALG_TLS12_ECJPAKE_TO_PMS
+
+/* Disable EC-JPAKE — not used by TEE */
+#undef PSA_WANT_ALG_JPAKE
+
+/* Disable LMS/LMOTS hash-based signatures — not used by TEE */
+#undef MBEDTLS_LMS_C
+
+/* Disable self-test functions to save code size */
+#undef MBEDTLS_SELF_TEST
+
+/* TEE uses EXTERNAL_RNG, no need for CTR-DRBG */
+#undef MBEDTLS_CTR_DRBG_C
+
+/* Disable PEM/Base64 — TEE uses DER format */
+#undef MBEDTLS_PEM_PARSE_C
+#undef MBEDTLS_PEM_WRITE_C
+#undef MBEDTLS_BASE64_C
+
+/* Disable PK layer — TEE uses PSA API directly */
+#undef MBEDTLS_PK_C
+#undef MBEDTLS_PK_PARSE_C
+#undef MBEDTLS_PK_WRITE_C
+
+/* Disable NIST key wrapping and PKCS5 — not used by TEE */
+#undef MBEDTLS_NIST_KW_C
+#undef MBEDTLS_PKCS5_C
+
+/* TEE has no filesystem */
+#undef MBEDTLS_FS_IO
+
 /* ESP-TEE is single threaded so we can disable threading in mbedTLS */
 #undef MBEDTLS_THREADING_C