Enable building with BoringSSL #1594
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Signed-off-by: Laurenz Altenmüller <git@laure.nz>
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Apr 7, 2025
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I'm writing Bazel build files for paho.mqtt.c and want to link against BoringSSL instead of OpenSSL or LibreSSL.
BIO_f_base64(https://docs.openssl.org/3.3/man3/BIO_f_base64/) is deprecated and can't easily be used when using BoringSSL via Bazel:https://github.com/google/boringssl/blob/a553a9d65aa4e4f28a6c3007db14e9605e7c3bde/include/openssl/bio.h#L788-L797
This PR updates src/Base64.c to use the recommended
EVP_EncodeBlock/EVP_DecodeBase64functions instead, which are available.The other change in src/MQTTAsyncUtils.c is analogous to #1426 - BoringSSL targets OpenSSL 1.1.0 but not all APIs are actually implemented (see https://github.com/google/boringssl/blob/main/PORTING.md)