NID_sha256, NID_sha384, NID_sha512, NID_sha512_224, NID_sha512_256,
NID_sha3_224, NID_sha3_256, NID_sha3_384 or NID_sha3_512.
-If this method is not called then the default type is given by RAND_DRBG_TYPE.
+If this method is not called then the default type is given by NID_aes_256_ctr
+and the default flags are zero.
Before the DRBG can be used to generate random bits, it is necessary to set
its type and to instantiate it.
These 3 flags can be used to set the individual DRBG types created. Multiple
calls are required to set the types to different values. If none of these 3
-flags are used, then the same type and flags are used for all 3 DRBG's in the
-B<drbg> chain (<master>, <public> and <private>). The default used if this
-method is not called is to use RAND_DRBG_FLAGS.
+flags are used, then the same type and flags are used for all 3 DRBGs in the
+B<drbg> chain (<master>, <public> and <private>).
=back