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BearSSL is an implementation of the SSL/TLS protocol (RFC 5246) written
in C. It aims at offering the following features:

* Be correct and secure. In particular, insecure protocol versions and
  choices of algorithms are not supported, by design; cryptographic
  algorithm implementations are constant-time by default.

* Be small, both in RAM and code footprint. For instance, a minimal
  server implementation may fit in about 20 kilobytes of compiled code and
  25 kilobytes of RAM.

* Be highly portable. BearSSL targets not operating systems like Linux
  and Windows, but also small embedded systems and even special contexts
  like bootstrap code.

* Be feature-rich and extensible. SSL/TLS has many defined cipher suites
  and extensions; BearSSL should implement most of them, and allow extra
  algorithm implementations to be added afterwards, possibly from third
  parties.