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Kconfig
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Kconfig
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menu "ESP-TLS"
choice ESP_TLS_LIBRARY_CHOOSE
prompt "Choose SSL/TLS library for ESP-TLS (See help for more Info)"
default ESP_TLS_USING_MBEDTLS
help
The ESP-TLS APIs support multiple backend TLS libraries. Currently mbedTLS and WolfSSL are
supported. Different TLS libraries may support different features and have different resource
usage. Consult the ESP-TLS documentation in ESP-IDF Programming guide for more details.
config ESP_TLS_USING_MBEDTLS
bool "mbedTLS"
config ESP_TLS_USING_WOLFSSL
depends on TLS_STACK_WOLFSSL
bool "wolfSSL (License info in wolfSSL directory README)"
endchoice
config ESP_TLS_USE_SECURE_ELEMENT
bool "Use Secure Element (ATECC608A) with ESP-TLS"
depends on IDF_TARGET_ESP32 && ESP_TLS_USING_MBEDTLS
select ATCA_MBEDTLS_ECDSA
select ATCA_MBEDTLS_ECDSA_SIGN
select ATCA_MBEDTLS_ECDSA_VERIFY
help
Enable use of Secure Element for ESP-TLS, this enables internal support for
ATECC608A peripheral on ESPWROOM32SE, which can be used for TLS connection.
config ESP_TLS_USE_DS_PERIPHERAL
bool "Use Digital Signature (DS) Peripheral with ESP-TLS"
depends on ESP_TLS_USING_MBEDTLS && SOC_DIG_SIGN_SUPPORTED
default y
help
Enable use of the Digital Signature Peripheral for ESP-TLS.The DS peripheral
can only be used when it is appropriately configured for TLS.
Consult the ESP-TLS documentation in ESP-IDF Programming Guide for more details.
config ESP_TLS_CLIENT_SESSION_TICKETS
bool "Enable client session tickets"
depends on ESP_TLS_USING_MBEDTLS && MBEDTLS_CLIENT_SSL_SESSION_TICKETS
help
Enable session ticket support as specified in RFC5077.
config ESP_TLS_SERVER
bool "Enable ESP-TLS Server"
depends on (ESP_TLS_USING_MBEDTLS && MBEDTLS_TLS_SERVER) || ESP_TLS_USING_WOLFSSL
help
Enable support for creating server side SSL/TLS session, available for mbedTLS
as well as wolfSSL TLS library.
config ESP_TLS_SERVER_SESSION_TICKETS
bool "Enable server session tickets"
depends on ESP_TLS_SERVER && ESP_TLS_USING_MBEDTLS && MBEDTLS_SERVER_SSL_SESSION_TICKETS
help
Enable session ticket support as specified in RFC5077
config ESP_TLS_SERVER_SESSION_TICKET_TIMEOUT
int "Server session ticket timeout in seconds"
depends on ESP_TLS_SERVER_SESSION_TICKETS
default 86400
help
Sets the session ticket timeout used in the tls server.
config ESP_TLS_SERVER_CERT_SELECT_HOOK
bool "Certificate selection hook"
depends on ESP_TLS_USING_MBEDTLS && ESP_TLS_SERVER
help
Ability to configure and use a certificate selection callback during server handshake,
to select a certificate to present to the client based on the TLS extensions supplied in
the client hello (alpn, sni, etc).
config ESP_TLS_SERVER_MIN_AUTH_MODE_OPTIONAL
bool "ESP-TLS Server: Set minimum Certificate Verification mode to Optional"
depends on ESP_TLS_SERVER && ESP_TLS_USING_MBEDTLS
help
When this option is enabled, the peer (here, the client) certificate is checked by the server,
however the handshake continues even if verification failed. By default, the
peer certificate is not checked and ignored by the server.
mbedtls_ssl_get_verify_result() can be called after the handshake is complete to
retrieve status of verification.
config ESP_TLS_PSK_VERIFICATION
bool "Enable PSK verification"
select MBEDTLS_PSK_MODES if ESP_TLS_USING_MBEDTLS
select MBEDTLS_KEY_EXCHANGE_PSK if ESP_TLS_USING_MBEDTLS
select MBEDTLS_KEY_EXCHANGE_DHE_PSK if ESP_TLS_USING_MBEDTLS && MBEDTLS_DHM_C
select MBEDTLS_KEY_EXCHANGE_ECDHE_PSK if ESP_TLS_USING_MBEDTLS && MBEDTLS_ECDH_C
select MBEDTLS_KEY_EXCHANGE_RSA_PSK if ESP_TLS_USING_MBEDTLS
help
Enable support for pre shared key ciphers, supported for both mbedTLS as well as
wolfSSL TLS library.
config ESP_TLS_INSECURE
bool "Allow potentially insecure options"
help
You can enable some potentially insecure options. These options should only be used for testing pusposes.
Only enable these options if you are very sure.
config ESP_TLS_SKIP_SERVER_CERT_VERIFY
bool "Skip server certificate verification by default (WARNING: ONLY FOR TESTING PURPOSE, READ HELP)"
depends on ESP_TLS_INSECURE
help
After enabling this option the esp-tls client will skip the server certificate verification
by default. Note that this option will only modify the default behaviour of esp-tls client
regarding server cert verification. The default behaviour should only be applicable when
no other option regarding the server cert verification is opted in the esp-tls config
(e.g. crt_bundle_attach, use_global_ca_store etc.).
WARNING : Enabling this option comes with a potential risk of establishing a TLS connection
with a server which has a fake identity, provided that the server certificate
is not provided either through API or other mechanism like ca_store etc.
config ESP_WOLFSSL_SMALL_CERT_VERIFY
bool "Enable SMALL_CERT_VERIFY"
depends on ESP_TLS_USING_WOLFSSL
default y
help
Enables server verification with Intermediate CA cert, does not authenticate full chain
of trust upto the root CA cert (After Enabling this option client only needs to have Intermediate
CA certificate of the server to authenticate server, root CA cert is not necessary).
config ESP_DEBUG_WOLFSSL
bool "Enable debug logs for wolfSSL"
depends on ESP_TLS_USING_WOLFSSL
help
Enable detailed debug prints for wolfSSL SSL library.
endmenu