https://github.com/esp8266/Arduino/tree ... uestCACert
howsmyssl.com reports the following.
cipher suite 0 TLS_RSA_WITH_AES_128_CBC_SHA256
cipher suite 1 TLS_RSA_WITH_AES_256_CBC_SHA256
cipher suite 2 TLS_RSA_WITH_AES_256_CBC_SHA
cipher suite 3 TLS_RSA_WITH_AES_128_CBC_SHA
ephermeral keys supported 0
session ticket supported 0
tls compression supported 0
unknown_cipher suite supported 0
beast vuln 0
able to detect n minus one splitting 0
tls version TLS 1.2
rating Improvable