hare

commit ea42230b00e471500a2bb9731bc32e137a0eee98
parent 6a8fe0a32464e8f34c8d03d4df1d81e5089fb334
Author: Armin Preiml <apreiml@strohwolke.at>
Date:   Wed, 17 Nov 2021 12:30:38 +0100

add block size bsz to hash

HMAC needs to know the block size of given hash.

Signed-off-by: Armin Preiml <apreiml@strohwolke.at>

Diffstat:
M
crypto/md5/md5.ha
 | 
1
+
M
crypto/sha1/sha1.ha
 | 
1
+
M
crypto/sha256/sha256.ha
 | 
1
+
M
crypto/sha512/sha512.ha
 | 
1
+
M
hash/hash.ha
 | 
9
+++++++++

5 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/crypto/md5/md5.ha b/crypto/md5/md5.ha
@@ -33,6 +33,7 @@ export fn md5() digest = {
 		sum = &sum,
 		reset = &reset,
 		sz = SIZE,
+		bsz = chunk,
 		...
 	};
 	hash::reset(&md5);
diff --git a/crypto/sha1/sha1.ha b/crypto/sha1/sha1.ha
@@ -32,6 +32,7 @@ export fn sha1() digest = {
 		sum = &sum,
 		reset = &reset,
 		sz = SIZE,
+		bsz = BLOCKSIZE,
 		...
 	};
 	hash::reset(&sha);
diff --git a/crypto/sha256/sha256.ha b/crypto/sha256/sha256.ha
@@ -46,6 +46,7 @@ export fn sha256() state = {
 		sum = &sum,
 		reset = &reset,
 		sz = SIZE,
+		bsz = chunk,
 		...
 	};
 	hash::reset(&sha);
diff --git a/crypto/sha512/sha512.ha b/crypto/sha512/sha512.ha
@@ -84,6 +84,7 @@ fn init(var: variant, sz: size) digest = {
 		sum = &sum,
 		reset = &reset,
 		sz = sz,
+		bsz = chunk,
 		var = var,
 		...
 	};
diff --git a/hash/hash.ha b/hash/hash.ha
@@ -14,6 +14,12 @@ export type hash = struct {
 
 	// Size of the hash in bytes.
 	sz: size,
+
+	// Internal block size of the hash. Writing data to the hash
+	// function in chunks of this size will not require padding to
+	// obtain the final hash, such that [[hash::sum]] shall return
+	// the same checksum as [[hash::finish]].
+	bsz: size,
 };
 
 // Writes an input to the hash function.
@@ -43,3 +49,6 @@ export fn reset(h: *hash) void = h.reset(h);
 // Returns the size of the hash in bytes. This is consistent regardless
 // of the hash state.
 export fn sz(h: *hash) size = h.sz;
+
+// Returns the block size of the hash.
+export fn bsz(h: *hash) size = h.bsz;