ref: 4ab9c0f5b96c84329a887f7fdbba92066c8ad7a7
parent: 1960f69c112fec8cc78929ea6cd6596ce71abeab
author: Ori Bernstein <ori@eigenstate.org>
date: Tue Jun 3 14:57:12 EDT 2014
Use an array for state.
This makes it easier to common out the sha224 code.
--- a/libcryptohash/sha256.myr
+++ b/libcryptohash/sha256.myr
@@ -10,14 +10,7 @@
;;
type sha256 = struct
- a : uint32
- b : uint32
- c : uint32
- d : uint32
- e : uint32
- f : uint32
- g : uint32
- h : uint32
+ x : uint32[8]
tail : byte[64]
msglen : uint64
;;
@@ -31,14 +24,14 @@
}
const sha256init = {st- st.a = 0x6A09E667
- st.b = 0xBB67AE85
- st.c = 0x3C6EF372
- st.d = 0xA54FF53A
- st.e = 0x510e527f
- st.f = 0x9b05688c
- st.g = 0x1f83d9ab
- st.h = 0x5be0cd19
+ st.x[0] = 0x6A09E667
+ st.x[1] = 0xBB67AE85
+ st.x[2] = 0x3C6EF372
+ st.x[3] = 0xA54FF53A
+ st.x[4] = 0x510e527f
+ st.x[5] = 0x9b05688c
+ st.x[6] = 0x1f83d9ab
+ st.x[7] = 0x5be0cd19
st.msglen = 0
}
@@ -68,14 +61,14 @@
tail(st)
- pack(r[0:4], st.a)
- pack(r[4:8], st.b)
- pack(r[8:12], st.c)
- pack(r[12:16], st.d)
- pack(r[16:20], st.e)
- pack(r[20:24], st.f)
- pack(r[24:28], st.g)
- pack(r[28:32], st.h)
+ pack(r[0:4], st.x[0])
+ pack(r[4:8], st.x[1])
+ pack(r[8:12], st.x[2])
+ pack(r[12:16], st.x[3])
+ pack(r[16:20], st.x[4])
+ pack(r[20:24], st.x[5])
+ pack(r[24:28], st.x[6])
+ pack(r[28:32], st.x[7])
-> r
}
@@ -114,14 +107,14 @@
var s48, s49, s50, s51, s52, s53, s54, s55
var s56, s57, s58, s59, s60, s61, s62, s63
- a = st.a
- b = st.b
- c = st.c
- d = st.d
- e = st.e
- f = st.f
- g = st.g
- h = st.h
+ a = st.x[0]
+ b = st.x[1]
+ c = st.x[2]
+ d = st.x[3]
+ e = st.x[4]
+ f = st.x[5]
+ g = st.x[6]
+ h = st.x[7]
s00 = unpack(msg[ 0: 4])
s01 = unpack(msg[ 4: 8])
@@ -319,14 +312,14 @@
a += (((f << 26) | (f >> 6)) ^ ((f << 21) | (f >> 11)) ^ ((f << 7) | (f >> 25))) + (h ^ (f & (g ^ h))) + 0xc67178f2 + s63;
e += a; a += (((b << 30) | (b >> 2)) ^ ((b << 19) | (b >> 13)) ^ ((b << 10) | (b >> 22))) + ((b & (c | d)) | (c & d));
- st.a += a
- st.b += b
- st.c += c
- st.d += d
- st.e += e
- st.f += f
- st.g += g
- st.h += h
+ st.x[0] += a
+ st.x[1] += b
+ st.x[2] += c
+ st.x[3] += d
+ st.x[4] += e
+ st.x[5] += f
+ st.x[6] += g
+ st.x[7] += h
}
const unpack = {b