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// SPDX-License-Identifier: MPL-2.0
// (c) Hare authors <https://harelang.org>
// An abstract interface for implementing block ciphers.
export type blockvtable = struct {
blocksz: size,
nparallel: size,
encrypt: *fn(b: *block, dest: []u8, src: []u8) void,
decrypt: *fn(b: *block, dest: []u8, src: []u8) void,
finish: *fn(b: *block) void,
};
export type block = *blockvtable;
// Returns the block size in bytes for a [[block]] cipher.
export fn blocksz(b: *block) size = b.blocksz;
// Returns the number of blocks that can be processed at once for a [[block]]
// cipher.
export fn nparallel(b: *block) size = b.nparallel;
// Encrypt up to [[nparallel]] blocks from 'src' and writes to 'dest'.
export fn encrypt(b: *block, dest: []u8, src: []u8) void =
b.encrypt(b, dest, src);
// Decrypt up to [[nparallel]] blocks from 'src' and writes to 'dest'.
export fn decrypt(b: *block, dest: []u8, src: []u8) void =
b.decrypt(b, dest, src);
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