Espressif ESP32-S2 User Manual

Chapter 2. API Reference
CONFIG_MBEDTLS_RC4_MODE
RC4 Stream Cipher (legacy, insecure)
Found in: Component config > mbedTLS > Symmetric Ciphers
ARCFOUR (RC4) stream cipher can be disabled entirely, enabled but not added to default ciphersuites,
or enabled completely.
Please consider the security implications before enabling RC4.
Available options:
• Disabled (MBEDTLS_RC4_DISABLED)
• Enabled, not in default ciphersuites (MBEDTLS_RC4_ENABLED_NO_DEFAULT)
• Enabled (MBEDTLS_RC4_ENABLED)
CONFIG_MBEDTLS_BLOWFISH_C
Blowfish block cipher (read help)
Found in: Component config > mbedTLS > Symmetric Ciphers
Enables the Blowfish block cipher (not used for TLS sessions.)
The Blowfish cipher is not used for mbedTLS TLS sessions but can be used for other purposes. Read
up on the limitations of Blowfish (including Sweet32) before enabling.
Default value:
• No (disabled)
CONFIG_MBEDTLS_XTEA_C
XTEA block cipher
Found in: Component config > mbedTLS > Symmetric Ciphers
Enables the XTEA block cipher.
Default value:
• No (disabled)
CONFIG_MBEDTLS_CCM_C
CCM (Counter with CBC-MAC) block cipher modes
Found in: Component config > mbedTLS > Symmetric Ciphers
Enable Counter with CBC-MAC (CCM) modes for AES and/or Camellia ciphers.
Disabling this option saves some code size.
Default value:
• Yes (enabled)
CONFIG_MBEDTLS_GCM_C
GCM (Galois/Counter) block cipher modes
Found in: Component config > mbedTLS > Symmetric Ciphers
Enable Galois/Counter Mode for AES and/or Camellia ciphers.
This option is generally faster than CCM.
Default value:
• Yes (enabled)
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Release v4.4

Espressif ESP32-S2 Specifications

General

Brand	Espressif
Model	ESP32-S2
Category	Single board computers
Language	English