This lets us extract large integers without involving math/big.

While at it, drop some use of reflect where a type switch will do.

Change-Id: Iebe2fb2267610bf95cf9747ba1d49b5ac9e62cda
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/451515
Run-TryBot: Filippo Valsorda <[email protected]>
Reviewed-by: Damien Neil <[email protected]>
Reviewed-by: Bryan Mills <[email protected]>
Reviewed-by: Roland Shoemaker <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Auto-Submit: Filippo Valsorda <[email protected]>

Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

Change-Id: If72a913d54ec282d75e270409971b148df4b417c
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/455436
Reviewed-by: Carlos Amedee <[email protected]>
Run-TryBot: Gopher Robot <[email protected]>
Auto-Submit: Gopher Robot <[email protected]>
Reviewed-by: Heschi Kreinick <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>