[sr-dev] addition of a cryptographic secure RNG to git master

Hello, I've added a cryptographic secure pseudo random number generator to git master. It is located in src/core/random/fortuna. There are easy wrapper function available in src/core/random/cryptorand.h - this is the one that is easiest to use. Please use this if you need cryptographic secure random numbers in your module. The wrapper provides a similar API as fastrand or kam_rand: /* seed the generator, will also use system randomness */ void cryptorand_seed(const unsigned int seed) /* generate a 32 bit random number */ unsigned int cryptorand(void) Motivation for this addition was the issue [1] related to the TLS module and openssl-1.1. The implementation was based on libfortuna [2]. It was refactored to the Kamailio core and all not necessary parts were removed. It is seeded from the core at startup and also includes automatic time-based reseeding from kernel random sources. As part of this implementation I also consolidated the existing crypto related code into a new directory: src/core/crypto. This way I could also get rid of the srutils library dependency for several modules. This changes will not backported in this way to 5.3.0. There will be probably for 5.3. a dedicated copy of the necessary code to the TLS module. If you notice any issues, please let me know. Cheers, Henning [1] https://github.com/kamailio/kamailio/issues/2077 [2] https://github.com/henningw/libfortuna -- Kamailio Merchandising - https://skalatan.de/merchandising/ Kamailio services - https://skalatan.de/services Henning Westerholt - https://skalatan.de/blog/