bi_crt

Use the Chinese Remainder Theorem to quickly perform RSA decrypts.

static bigint *bi_crt(
　　const RSA_CTX * rsa
　　bigint * bi
)

rsa

bi

Use the Chinese Remainder Theorem to quickly perform RSA decrypts.
This should really be in bigint.c (and was at one stage), but needs
access to the RSA_CTX context...