2016-09-21 02:36:30 -04:00
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menu "mbedTLS"
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2019-01-25 11:10:53 -05:00
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choice MBEDTLS_MEM_ALLOC_MODE
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prompt "Memory allocation strategy"
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default MBEDTLS_INTERNAL_MEM_ALLOC
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help
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Allocation strategy for mbedTLS, essentially provides ability to
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allocate all required dynamic allocations from,
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2018-09-19 05:59:20 -04:00
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- Internal DRAM memory only
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- External SPIRAM memory only
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- Either internal or external memory based on default malloc()
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behavior in ESP-IDF
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- Custom allocation mode, by overwriting calloc()/free() using
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mbedtls_platform_set_calloc_free() function
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2019-01-25 11:10:53 -05:00
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Recommended mode here is always internal, since that is most preferred
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from security perspective. But if application requirement does not
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allow sufficient free internal memory then alternate mode can be
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selected.
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config MBEDTLS_INTERNAL_MEM_ALLOC
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bool "Internal memory"
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config MBEDTLS_EXTERNAL_MEM_ALLOC
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bool "External SPIRAM"
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depends on SPIRAM_SUPPORT
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config MBEDTLS_DEFAULT_MEM_ALLOC
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bool "Default alloc mode"
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config MBEDTLS_CUSTOM_MEM_ALLOC
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bool "Custom alloc mode"
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endchoice #MBEDTLS_MEM_ALLOC_MODE
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config MBEDTLS_SSL_MAX_CONTENT_LEN
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int "TLS maximum message content length"
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default 16384
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range 512 16384
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depends on !MBEDTLS_ASYMMETRIC_CONTENT_LEN
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help
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Maximum TLS message length (in bytes) supported by mbedTLS.
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16384 is the default and this value is required to comply
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fully with TLS standards.
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However you can set a lower value in order to save RAM. This
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is safe if the other end of the connection supports Maximum
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Fragment Length Negotiation Extension (max_fragment_length,
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see RFC6066) or you know for certain that it will never send a
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message longer than a certain number of bytes.
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If the value is set too low, symptoms are a failed TLS
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handshake or a return value of MBEDTLS_ERR_SSL_INVALID_RECORD
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(-0x7200).
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config MBEDTLS_ASYMMETRIC_CONTENT_LEN
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bool "Asymmetric in/out fragment length"
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default n
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help
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If enabled, this option allows customizing TLS in/out fragment length
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in asymmetric way. Please note that enabling this with default values
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saves 12KB of dynamic memory per TLS connection.
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config MBEDTLS_SSL_IN_CONTENT_LEN
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int "TLS maximum incoming fragment length"
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default 16384
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range 512 16384
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depends on MBEDTLS_ASYMMETRIC_CONTENT_LEN
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help
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This defines maximum incoming fragment length, overriding default
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maximum content length (MBEDTLS_SSL_MAX_CONTENT_LEN).
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config MBEDTLS_SSL_OUT_CONTENT_LEN
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int "TLS maximum outgoing fragment length"
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default 4096
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range 512 16384
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depends on MBEDTLS_ASYMMETRIC_CONTENT_LEN
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help
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This defines maximum outgoing fragment length, overriding default
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maximum content length (MBEDTLS_SSL_MAX_CONTENT_LEN).
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config MBEDTLS_DEBUG
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bool "Enable mbedTLS debugging"
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default n
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help
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Enable mbedTLS debugging functions at compile time.
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If this option is enabled, you can include
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"mbedtls/esp_debug.h" and call mbedtls_esp_enable_debug_log()
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at runtime in order to enable mbedTLS debug output via the ESP
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log mechanism.
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config MBEDTLS_HARDWARE_AES
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bool "Enable hardware AES acceleration"
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default y
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help
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Enable hardware accelerated AES encryption & decryption.
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Note that if the ESP32 CPU is running at 240MHz, hardware AES does not
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offer any speed boost over software AES.
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config MBEDTLS_HARDWARE_MPI
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bool "Enable hardware MPI (bignum) acceleration"
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default n
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help
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Enable hardware accelerated multiple precision integer operations.
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Hardware accelerated multiplication, modulo multiplication,
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and modular exponentiation for up to 4096 bit results.
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These operations are used by RSA.
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config MBEDTLS_MPI_USE_INTERRUPT
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bool "Use interrupt for MPI operations"
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depends on MBEDTLS_HARDWARE_MPI
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default n
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help
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Use an interrupt to coordinate MPI operations.
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This allows other code to run on the CPU while an MPI operation is pending.
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Otherwise the CPU busy-waits.
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config MBEDTLS_HARDWARE_SHA
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bool "Enable hardware SHA acceleration"
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default n
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help
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Enable hardware accelerated SHA1, SHA256, SHA384 & SHA512 in mbedTLS.
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Due to a hardware limitation, hardware acceleration is only
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guaranteed if SHA digests are calculated one at a time. If more
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than one SHA digest is calculated at the same time, one will
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be calculated fully in hardware and the rest will be calculated
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(at least partially calculated) in software. This happens automatically.
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SHA hardware acceleration is faster than software in some situations but
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slower in others. You should benchmark to find the best setting for you.
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config MBEDTLS_HAVE_TIME
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bool "Enable mbedtls time"
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depends on !ESP32_TIME_SYSCALL_USE_NONE
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default y
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help
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System has time.h and time().
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The time does not need to be correct, only time differences are used.
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config MBEDTLS_HAVE_TIME_DATE
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bool "Enable mbedtls certificate expiry check"
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depends on MBEDTLS_HAVE_TIME
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default n
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help
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System has time.h and time(), gmtime() and the clock is correct.
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The time needs to be correct (not necesarily very accurate, but at least
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the date should be correct). This is used to verify the validity period of
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X.509 certificates.
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It is suggested that you should get the real time by "SNTP".
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choice MBEDTLS_TLS_MODE
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bool "TLS Protocol Role"
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default MBEDTLS_TLS_SERVER_AND_CLIENT
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help
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mbedTLS can be compiled with protocol support for the TLS
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server, TLS client, or both server and client.
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Reducing the number of TLS roles supported saves code size.
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config MBEDTLS_TLS_SERVER_AND_CLIENT
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bool "Server & Client"
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select MBEDTLS_TLS_SERVER
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select MBEDTLS_TLS_CLIENT
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config MBEDTLS_TLS_SERVER_ONLY
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bool "Server"
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select MBEDTLS_TLS_SERVER
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config MBEDTLS_TLS_CLIENT_ONLY
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bool "Client"
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select MBEDTLS_TLS_CLIENT
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config MBEDTLS_TLS_DISABLED
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bool "None"
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endchoice
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config MBEDTLS_TLS_SERVER
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bool
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select MBEDTLS_TLS_ENABLED
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config MBEDTLS_TLS_CLIENT
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bool
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select MBEDTLS_TLS_ENABLED
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config MBEDTLS_TLS_ENABLED
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bool
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menu "TLS Key Exchange Methods"
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depends on MBEDTLS_TLS_ENABLED
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config MBEDTLS_PSK_MODES
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bool "Enable pre-shared-key ciphersuites"
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default n
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help
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Enable to show configuration for different types of pre-shared-key TLS authentatication methods.
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Leaving this options disabled will save code size if they are not used.
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config MBEDTLS_KEY_EXCHANGE_PSK
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bool "Enable PSK based ciphersuite modes"
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depends on MBEDTLS_PSK_MODES
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default n
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help
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Enable to support symmetric key PSK (pre-shared-key) TLS key exchange modes.
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config MBEDTLS_KEY_EXCHANGE_DHE_PSK
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bool "Enable DHE-PSK based ciphersuite modes"
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depends on MBEDTLS_PSK_MODES
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default y
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help
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Enable to support Diffie-Hellman PSK (pre-shared-key) TLS authentication modes.
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config MBEDTLS_KEY_EXCHANGE_ECDHE_PSK
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bool "Enable ECDHE-PSK based ciphersuite modes"
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depends on MBEDTLS_PSK_MODES
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default y
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help
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Enable to support Elliptic-Curve-Diffie-Hellman PSK (pre-shared-key) TLS authentication modes.
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config MBEDTLS_KEY_EXCHANGE_RSA_PSK
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bool "Enable RSA-PSK based ciphersuite modes"
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depends on MBEDTLS_PSK_MODES
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default y
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help
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Enable to support RSA PSK (pre-shared-key) TLS authentication modes.
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config MBEDTLS_KEY_EXCHANGE_RSA
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bool "Enable RSA-only based ciphersuite modes"
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default y
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help
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Enable to support ciphersuites with prefix TLS-RSA-WITH-
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config MBEDTLS_KEY_EXCHANGE_DHE_RSA
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bool "Enable DHE-RSA based ciphersuite modes"
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default y
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help
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Enable to support ciphersuites with prefix TLS-DHE-RSA-WITH-
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config MBEDTLS_KEY_EXCHANGE_ELLIPTIC_CURVE
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bool "Support Elliptic Curve based ciphersuites"
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depends on MBEDTLS_ECP_C
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default y
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help
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Enable to show Elliptic Curve based ciphersuite mode options.
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Disabling all Elliptic Curve ciphersuites saves code size and
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can give slightly faster TLS handshakes, provided the server supports
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RSA-only ciphersuite modes.
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config MBEDTLS_KEY_EXCHANGE_ECDHE_RSA
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bool "Enable ECDHE-RSA based ciphersuite modes"
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depends on MBEDTLS_KEY_EXCHANGE_ELLIPTIC_CURVE && MBEDTLS_ECDH_C
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default y
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help
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Enable to support ciphersuites with prefix TLS-ECDHE-RSA-WITH-
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config MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA
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bool "Enable ECDHE-ECDSA based ciphersuite modes"
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depends on MBEDTLS_KEY_EXCHANGE_ELLIPTIC_CURVE && MBEDTLS_ECDH_C && MBEDTLS_ECDSA_C
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default y
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help
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Enable to support ciphersuites with prefix TLS-ECDHE-RSA-WITH-
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config MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA
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bool "Enable ECDH-ECDSA based ciphersuite modes"
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depends on MBEDTLS_KEY_EXCHANGE_ELLIPTIC_CURVE && MBEDTLS_ECDH_C && MBEDTLS_ECDSA_C
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default y
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help
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Enable to support ciphersuites with prefix TLS-ECDHE-RSA-WITH-
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config MBEDTLS_KEY_EXCHANGE_ECDH_RSA
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bool "Enable ECDH-RSA based ciphersuite modes"
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depends on MBEDTLS_KEY_EXCHANGE_ELLIPTIC_CURVE && MBEDTLS_ECDH_C
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default y
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help
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Enable to support ciphersuites with prefix TLS-ECDHE-RSA-WITH-
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endmenu # TLS key exchange modes
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config MBEDTLS_SSL_RENEGOTIATION
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bool "Support TLS renegotiation"
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depends on MBEDTLS_TLS_ENABLED
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default y
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help
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The two main uses of renegotiation are (1) refresh keys on long-lived
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connections and (2) client authentication after the initial handshake.
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If you don't need renegotiation, disabling it will save code size and
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reduce the possibility of abuse/vulnerability.
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config MBEDTLS_SSL_PROTO_SSL3
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bool "Legacy SSL 3.0 support"
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depends on MBEDTLS_TLS_ENABLED
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default n
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help
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Support the legacy SSL 3.0 protocol. Most servers will speak a newer
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TLS protocol these days.
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config MBEDTLS_SSL_PROTO_TLS1
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bool "Support TLS 1.0 protocol"
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depends on MBEDTLS_TLS_ENABLED
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default y
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config MBEDTLS_SSL_PROTO_TLS1_1
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bool "Support TLS 1.1 protocol"
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depends on MBEDTLS_TLS_ENABLED
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default y
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config MBEDTLS_SSL_PROTO_TLS1_2
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bool "Support TLS 1.2 protocol"
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depends on MBEDTLS_TLS_ENABLED
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default y
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config MBEDTLS_SSL_PROTO_DTLS
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bool "Support DTLS protocol (all versions)"
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default n
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depends on MBEDTLS_SSL_PROTO_TLS1_1 || MBEDTLS_SSL_PROTO_TLS1_2
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help
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Requires TLS 1.1 to be enabled for DTLS 1.0
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Requires TLS 1.2 to be enabled for DTLS 1.2
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config MBEDTLS_SSL_ALPN
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bool "Support ALPN (Application Layer Protocol Negotiation)"
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depends on MBEDTLS_TLS_ENABLED
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default y
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help
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Disabling this option will save some code size if it is not needed.
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config MBEDTLS_SSL_SESSION_TICKETS
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bool "TLS: Support RFC 5077 SSL session tickets"
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default y
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|
depends on MBEDTLS_TLS_ENABLED
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|
help
|
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|
Support RFC 5077 session tickets. See mbedTLS documentation for more details.
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Disabling this option will save some code size.
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menu "Symmetric Ciphers"
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config MBEDTLS_AES_C
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bool "AES block cipher"
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default y
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config MBEDTLS_CAMELLIA_C
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bool "Camellia block cipher"
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default n
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config MBEDTLS_DES_C
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bool "DES block cipher (legacy, insecure)"
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default n
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help
|
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|
Enables the DES block cipher to support 3DES-based TLS ciphersuites.
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3DES is vulnerable to the Sweet32 attack and should only be enabled
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if absolutely necessary.
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choice MBEDTLS_RC4_MODE
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prompt "RC4 Stream Cipher (legacy, insecure)"
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default MBEDTLS_RC4_DISABLED
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help
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|
ARCFOUR (RC4) stream cipher can be disabled entirely, enabled but not
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|
added to default ciphersuites, or enabled completely.
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Please consider the security implications before enabling RC4.
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config MBEDTLS_RC4_DISABLED
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bool "Disabled"
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config MBEDTLS_RC4_ENABLED_NO_DEFAULT
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bool "Enabled, not in default ciphersuites"
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config MBEDTLS_RC4_ENABLED
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bool "Enabled"
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endchoice
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config MBEDTLS_BLOWFISH_C
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bool "Blowfish block cipher (read help)"
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default n
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|
help
|
|
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|
|
Enables the Blowfish block cipher (not used for TLS sessions.)
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|
The Blowfish cipher is not used for mbedTLS TLS sessions but can be
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|
used for other purposes. Read up on the limitations of Blowfish (including
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|
|
Sweet32) before enabling.
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config MBEDTLS_XTEA_C
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|
bool "XTEA block cipher"
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|
default n
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|
help
|
|
|
|
|
Enables the XTEA block cipher.
|
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config MBEDTLS_CCM_C
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|
|
bool "CCM (Counter with CBC-MAC) block cipher modes"
|
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|
|
default y
|
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|
|
depends on MBEDTLS_AES_C || MBEDTLS_CAMELLIA_C
|
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|
|
help
|
|
|
|
|
Enable Counter with CBC-MAC (CCM) modes for AES and/or Camellia ciphers.
|
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|
Disabling this option saves some code size.
|
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|
|
config MBEDTLS_GCM_C
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|
|
bool "GCM (Galois/Counter) block cipher modes"
|
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|
|
default y
|
|
|
|
|
depends on MBEDTLS_AES_C || MBEDTLS_CAMELLIA_C
|
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|
|
help
|
|
|
|
|
Enable Galois/Counter Mode for AES and/or Camellia ciphers.
|
|
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|
|
This option is generally faster than CCM.
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|
|
endmenu # Symmetric Ciphers
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|
|
config MBEDTLS_RIPEMD160_C
|
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|
|
|
bool "Enable RIPEMD-160 hash algorithm"
|
|
|
|
|
default n
|
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|
|
help
|
|
|
|
|
Enable the RIPEMD-160 hash algorithm.
|
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|
|
menu "Certificates"
|
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|
|
config MBEDTLS_PEM_PARSE_C
|
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|
|
bool "Read & Parse PEM formatted certificates"
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable decoding/parsing of PEM formatted certificates.
|
|
|
|
|
|
|
|
|
|
If your certificates are all in the simpler DER format, disabling
|
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|
|
|
this option will save some code size.
|
|
|
|
|
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|
|
config MBEDTLS_PEM_WRITE_C
|
|
|
|
|
bool "Write PEM formatted certificates"
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable writing of PEM formatted certificates.
|
|
|
|
|
|
|
|
|
|
If writing certificate data only in DER format, disabling this
|
|
|
|
|
option will save some code size.
|
|
|
|
|
|
|
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|
|
config MBEDTLS_X509_CRL_PARSE_C
|
|
|
|
|
bool "X.509 CRL parsing"
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Support for parsing X.509 Certifificate Revocation Lists.
|
|
|
|
|
|
|
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|
|
config MBEDTLS_X509_CSR_PARSE_C
|
|
|
|
|
bool "X.509 CSR parsing"
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Support for parsing X.509 Certifificate Signing Requests
|
|
|
|
|
|
|
|
|
|
endmenu # Certificates
|
|
|
|
|
|
|
|
|
|
menuconfig MBEDTLS_ECP_C
|
|
|
|
|
bool "Elliptic Curve Ciphers"
|
|
|
|
|
default y
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECDH_C
|
|
|
|
|
bool "Elliptic Curve Diffie-Hellman (ECDH)"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable ECDH. Needed to use ECDHE-xxx TLS ciphersuites.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECDSA_C
|
|
|
|
|
bool "Elliptic Curve DSA"
|
|
|
|
|
depends on MBEDTLS_ECDH_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable ECDSA. Needed to use ECDSA-xxx TLS ciphersuites.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_DP_SECP192R1_ENABLED
|
|
|
|
|
bool "Enable SECP192R1 curve"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable support for SECP192R1 Elliptic Curve.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_DP_SECP224R1_ENABLED
|
|
|
|
|
bool "Enable SECP224R1 curve"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable support for SECP224R1 Elliptic Curve.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_DP_SECP256R1_ENABLED
|
|
|
|
|
bool "Enable SECP256R1 curve"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable support for SECP256R1 Elliptic Curve.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_DP_SECP384R1_ENABLED
|
|
|
|
|
bool "Enable SECP384R1 curve"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable support for SECP384R1 Elliptic Curve.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_DP_SECP521R1_ENABLED
|
|
|
|
|
bool "Enable SECP521R1 curve"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable support for SECP521R1 Elliptic Curve.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_DP_SECP192K1_ENABLED
|
|
|
|
|
bool "Enable SECP192K1 curve"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable support for SECP192K1 Elliptic Curve.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_DP_SECP224K1_ENABLED
|
|
|
|
|
bool "Enable SECP224K1 curve"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable support for SECP224K1 Elliptic Curve.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_DP_SECP256K1_ENABLED
|
|
|
|
|
bool "Enable SECP256K1 curve"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable support for SECP256K1 Elliptic Curve.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_DP_BP256R1_ENABLED
|
|
|
|
|
bool "Enable BP256R1 curve"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
support for DP Elliptic Curve.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_DP_BP384R1_ENABLED
|
|
|
|
|
bool "Enable BP384R1 curve"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
support for DP Elliptic Curve.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_DP_BP512R1_ENABLED
|
|
|
|
|
bool "Enable BP512R1 curve"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
support for DP Elliptic Curve.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_DP_CURVE25519_ENABLED
|
|
|
|
|
bool "Enable CURVE25519 curve"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Enable support for CURVE25519 Elliptic Curve.
|
|
|
|
|
|
|
|
|
|
config MBEDTLS_ECP_NIST_OPTIM
|
|
|
|
|
bool "NIST 'modulo p' optimisations"
|
|
|
|
|
depends on MBEDTLS_ECP_C
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
NIST 'modulo p' optimisations increase Elliptic Curve operation performance.
|
|
|
|
|
|
|
|
|
|
Disabling this option saves some code size.
|
|
|
|
|
|
|
|
|
|
# end of Elliptic Curve options
|
2017-08-18 03:44:33 -04:00
|
|
|
|
mbedtls: Expose compile-time config, disable some things by default
* Disables 3DES, Camellia, Blowfish, RC4, RIPEMD160, SSLv3, TLS-PSK modes, DTLS by default
* Saves about 40KB from the default TLS client code size
* Defaults no longer get "Bad" howsmyssl.com rating (no more vulnerable 3DES)
(ping https://github.com/espressif/arduino-esp32/issues/575 )
* Allows up to another 20-30KB code size to be trimmed without security
implications if using DER formatted certificates, RSA ciphersuites only,
etc.
* Can save up to another 8KB by setting the TLS Role to Server or Client only.
2017-08-17 03:15:04 -04:00
|
|
|
endmenu # mbedTLS
|
