diff options
Diffstat (limited to 'src/pkg/crypto/sha256/sha256block.go')
| -rw-r--r-- | src/pkg/crypto/sha256/sha256block.go | 62 |
1 files changed, 31 insertions, 31 deletions
diff --git a/src/pkg/crypto/sha256/sha256block.go b/src/pkg/crypto/sha256/sha256block.go index a00170859..7b0f55444 100644 --- a/src/pkg/crypto/sha256/sha256block.go +++ b/src/pkg/crypto/sha256/sha256block.go @@ -76,54 +76,54 @@ var _K = []uint32{ } func _Block(dig *digest, p []byte) int { - var w [64]uint32; - n := 0; - h0, h1, h2, h3, h4, h5, h6, h7 := dig.h[0], dig.h[1], dig.h[2], dig.h[3], dig.h[4], dig.h[5], dig.h[6], dig.h[7]; + var w [64]uint32 + n := 0 + h0, h1, h2, h3, h4, h5, h6, h7 := dig.h[0], dig.h[1], dig.h[2], dig.h[3], dig.h[4], dig.h[5], dig.h[6], dig.h[7] for len(p) >= _Chunk { // Can interlace the computation of w with the // rounds below if needed for speed. for i := 0; i < 16; i++ { - j := i * 4; - w[i] = uint32(p[j])<<24 | uint32(p[j+1])<<16 | uint32(p[j+2])<<8 | uint32(p[j+3]); + j := i * 4 + w[i] = uint32(p[j])<<24 | uint32(p[j+1])<<16 | uint32(p[j+2])<<8 | uint32(p[j+3]) } for i := 16; i < 64; i++ { - t1 := (w[i-2]>>17 | w[i-2]<<(32-17)) ^ (w[i-2]>>19 | w[i-2]<<(32-19)) ^ (w[i-2] >> 10); + t1 := (w[i-2]>>17 | w[i-2]<<(32-17)) ^ (w[i-2]>>19 | w[i-2]<<(32-19)) ^ (w[i-2] >> 10) - t2 := (w[i-15]>>7 | w[i-15]<<(32-7)) ^ (w[i-15]>>18 | w[i-15]<<(32-18)) ^ (w[i-15] >> 3); + t2 := (w[i-15]>>7 | w[i-15]<<(32-7)) ^ (w[i-15]>>18 | w[i-15]<<(32-18)) ^ (w[i-15] >> 3) - w[i] = t1 + w[i-7] + t2 + w[i-16]; + w[i] = t1 + w[i-7] + t2 + w[i-16] } - a, b, c, d, e, f, g, h := h0, h1, h2, h3, h4, h5, h6, h7; + a, b, c, d, e, f, g, h := h0, h1, h2, h3, h4, h5, h6, h7 for i := 0; i < 64; i++ { - t1 := h + ((e>>6 | e<<(32-6)) ^ (e>>11 | e<<(32-11)) ^ (e>>25 | e<<(32-25))) + ((e & f) ^ (^e & g)) + _K[i] + w[i]; + t1 := h + ((e>>6 | e<<(32-6)) ^ (e>>11 | e<<(32-11)) ^ (e>>25 | e<<(32-25))) + ((e & f) ^ (^e & g)) + _K[i] + w[i] - t2 := ((a>>2 | a<<(32-2)) ^ (a>>13 | a<<(32-13)) ^ (a>>22 | a<<(32-22))) + ((a & b) ^ (a & c) ^ (b & c)); + t2 := ((a>>2 | a<<(32-2)) ^ (a>>13 | a<<(32-13)) ^ (a>>22 | a<<(32-22))) + ((a & b) ^ (a & c) ^ (b & c)) - h = g; - g = f; - f = e; - e = d + t1; - d = c; - c = b; - b = a; - a = t1 + t2; + h = g + g = f + f = e + e = d + t1 + d = c + c = b + b = a + a = t1 + t2 } - h0 += a; - h1 += b; - h2 += c; - h3 += d; - h4 += e; - h5 += f; - h6 += g; - h7 += h; + h0 += a + h1 += b + h2 += c + h3 += d + h4 += e + h5 += f + h6 += g + h7 += h - p = p[_Chunk:]; - n += _Chunk; + p = p[_Chunk:] + n += _Chunk } - dig.h[0], dig.h[1], dig.h[2], dig.h[3], dig.h[4], dig.h[5], dig.h[6], dig.h[7] = h0, h1, h2, h3, h4, h5, h6, h7; - return n; + dig.h[0], dig.h[1], dig.h[2], dig.h[3], dig.h[4], dig.h[5], dig.h[6], dig.h[7] = h0, h1, h2, h3, h4, h5, h6, h7 + return n } |