//+build !noasm,!appengine package sha256 import ( "crypto/sha256" "encoding/binary" "testing" ) func sha256hash(m []byte) (r [32]byte) { var h [8]uint32 h[0] = 0x6a09e667 h[1] = 0xbb67ae85 h[2] = 0x3c6ef372 h[3] = 0xa54ff53a h[4] = 0x510e527f h[5] = 0x9b05688c h[6] = 0x1f83d9ab h[7] = 0x5be0cd19 blockSha(&h, m) l0 := len(m) l := l0 & (BlockSize - 1) m = m[l0-l:] var k [64]byte copy(k[:], m) k[l] = 0x80 if l >= 56 { blockSha(&h, k[:]) binary.LittleEndian.PutUint64(k[0:8], 0) binary.LittleEndian.PutUint64(k[8:16], 0) binary.LittleEndian.PutUint64(k[16:24], 0) binary.LittleEndian.PutUint64(k[24:32], 0) binary.LittleEndian.PutUint64(k[32:40], 0) binary.LittleEndian.PutUint64(k[40:48], 0) binary.LittleEndian.PutUint64(k[48:56], 0) } binary.BigEndian.PutUint64(k[56:64], uint64(l0)<<3) blockSha(&h, k[:]) binary.BigEndian.PutUint32(r[0:4], h[0]) binary.BigEndian.PutUint32(r[4:8], h[1]) binary.BigEndian.PutUint32(r[8:12], h[2]) binary.BigEndian.PutUint32(r[12:16], h[3]) binary.BigEndian.PutUint32(r[16:20], h[4]) binary.BigEndian.PutUint32(r[20:24], h[5]) binary.BigEndian.PutUint32(r[24:28], h[6]) binary.BigEndian.PutUint32(r[28:32], h[7]) return } func runTestSha(hashfunc func([]byte) [32]byte) bool { var m = []byte("This is a message. This is a message. This is a message. This is a message.") ar := hashfunc(m) br := sha256.Sum256(m) return ar == br } func TestSha0(t *testing.T) { if !runTestSha(Sum256) { t.Errorf("FAILED") } } func TestSha1(t *testing.T) { if sha && ssse3 && sse41 && !runTestSha(sha256hash) { t.Errorf("FAILED") } }