tree 4349e0c339863cd625f851d40179e36a2712e195
parent e51332472297b20171d027bcdbe543011c7def1f
author David Brown <david.brown@linaro.org> 1551378139 -0700
committer David Brown <davidb@davidb.org> 1555474821 +0700

sim: Create an `ImageData` type

Create an `ImageData` type to represent the stored content of a single
slot.  This holds plaintext and optional ciphertext.  This fixes a bit
of unclarity with regards to these fields:

  - Before, the plaintext was an Option, even though it is always
    present.  The field is clearly always present now.

  - The mapping between slot numbers, and plain and ciphertext was not
    made clear.  Now that is spelled out in a match statement.

  - The type has a name, rather than an anonymous array that looked a
    bit too much like it had to do with slot numbers.

Signed-off-by: David Brown <david.brown@linaro.org>