MBEDTLS_DHM_RFC3526_MODP_2048_P_BIN macro

RFC 3526, RFC 5114 and RFC 7919 standardize a number of Diffie-Hellman groups, some of which are included here for use within the SSL/TLS module and the user's convenience when configuring the Diffie-Hellman parameters by hand through \c mbedtls_ssl_conf_dh_param. The following lists the source of the above groups in the standards: - RFC 5114 section 2.2: 2048-bit MODP Group with 224-bit Prime Order Subgroup - RFC 3526 section 3: 2048-bit MODP Group - RFC 3526 section 4: 3072-bit MODP Group - RFC 3526 section 5: 4096-bit MODP Group - RFC 7919 section A.1: ffdhe2048 - RFC 7919 section A.2: ffdhe3072 - RFC 7919 section A.3: ffdhe4096 - RFC 7919 section A.4: ffdhe6144 - RFC 7919 section A.5: ffdhe8192 The constants with suffix "_p" denote the chosen prime moduli, while the constants with suffix "_g" denote the chosen generator of the associated prime field. The constants further suffixed with "_bin" are provided in binary format, while all other constants represent null-terminated strings holding the hexadecimal presentation of the respective numbers. The primes from RFC 3526 and RFC 7919 have been generating by the following trust-worthy procedure: - Fix N in { 2048, 3072, 4096, 6144, 8192 } and consider the N-bit number the first and last 64 bits are all 1, and the remaining N - 128 bits of which are 0x7ff...ff. - Add the smallest multiple of the first N - 129 bits of the binary expansion of pi (for RFC 5236) or e (for RFC 7919) to this intermediate bit-string such that the resulting integer is a safe-prime. - The result is the respective RFC 3526 / 7919 prime, and the corresponding generator is always chosen to be 2 (which is a square for these prime, hence the corresponding subgroup has order (p-1)/2 and avoids leaking a bit in the private exponent).