Don't rely on libcrypto returning static buffers #263
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sofia-sip is one of very few applications relying on being able to pass NULL as last argument to the one-step hashing functions. BoringSSL has removed this functionality in 2017 [1] and LibreSSL 4.0 will do the same. Applications can pass in a correctly-sized buffer on the stack. [1]: https://boringssl-review.googlesource.com/14528
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sofia-sip is one of very few applications relying on being able to pass NULL as last argument to the one-step hashing functions. BoringSSL has removed this functionality in 2017 1 and LibreSSL 4.0 will do the same. Applications can pass in a correctly-sized buffer on the stack.