| Message ID | 20201025143119.1054168-6-nivedita@alum.mit.edu |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v4,1/6] crypto: lib/sha256 - Use memzero_explicit() for clearing state | expand |
On Sun, 25 Oct 2020 at 15:31, Arvind Sankar <nivedita@alum.mit.edu> wrote: > > This reduces code size substantially (on x86_64 with gcc-10 the size of > sha256_update() goes from 7593 bytes to 1952 bytes including the new > SHA256_K array), and on x86 is slightly faster than the full unroll > (tested on Broadwell Xeon). > > Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu> > Reviewed-by: Eric Biggers <ebiggers@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> > --- > lib/crypto/sha256.c | 174 ++++++++++---------------------------------- > 1 file changed, 38 insertions(+), 136 deletions(-) > > diff --git a/lib/crypto/sha256.c b/lib/crypto/sha256.c > index c6bfeacc5b81..e2e29d9b0ccd 100644 > --- a/lib/crypto/sha256.c > +++ b/lib/crypto/sha256.c > @@ -18,6 +18,25 @@ > #include <crypto/sha.h> > #include <asm/unaligned.h> > > +static const u32 SHA256_K[] = { > + 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, > + 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, > + 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, > + 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, > + 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, > + 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, > + 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, > + 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, > + 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, > + 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, > + 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, > + 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, > + 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, > + 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, > + 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, > + 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2, > +}; > + > static inline u32 Ch(u32 x, u32 y, u32 z) > { > return z ^ (x & (y ^ z)); > @@ -43,9 +62,17 @@ static inline void BLEND_OP(int I, u32 *W) > W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16]; > } > > +#define SHA256_ROUND(i, a, b, c, d, e, f, g, h) do { \ > + u32 t1, t2; \ > + t1 = h + e1(e) + Ch(e, f, g) + SHA256_K[i] + W[i]; \ > + t2 = e0(a) + Maj(a, b, c); \ > + d += t1; \ > + h = t1 + t2; \ > +} while (0) > + > static void sha256_transform(u32 *state, const u8 *input, u32 *W) > { > - u32 a, b, c, d, e, f, g, h, t1, t2; > + u32 a, b, c, d, e, f, g, h; > int i; > > /* load the input */ > @@ -61,141 +88,16 @@ static void sha256_transform(u32 *state, const u8 *input, u32 *W) > e = state[4]; f = state[5]; g = state[6]; h = state[7]; > > /* now iterate */ > - t1 = h + e1(e) + Ch(e, f, g) + 0x428a2f98 + W[0]; > - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; > - t1 = g + e1(d) + Ch(d, e, f) + 0x71374491 + W[1]; > - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; > - t1 = f + e1(c) + Ch(c, d, e) + 0xb5c0fbcf + W[2]; > - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; > - t1 = e + e1(b) + Ch(b, c, d) + 0xe9b5dba5 + W[3]; > - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; > - t1 = d + e1(a) + Ch(a, b, c) + 0x3956c25b + W[4]; > - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; > - t1 = c + e1(h) + Ch(h, a, b) + 0x59f111f1 + W[5]; > - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; > - t1 = b + e1(g) + Ch(g, h, a) + 0x923f82a4 + W[6]; > - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; > - t1 = a + e1(f) + Ch(f, g, h) + 0xab1c5ed5 + W[7]; > - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; > - > - t1 = h + e1(e) + Ch(e, f, g) + 0xd807aa98 + W[8]; > - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; > - t1 = g + e1(d) + Ch(d, e, f) + 0x12835b01 + W[9]; > - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; > - t1 = f + e1(c) + Ch(c, d, e) + 0x243185be + W[10]; > - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; > - t1 = e + e1(b) + Ch(b, c, d) + 0x550c7dc3 + W[11]; > - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; > - t1 = d + e1(a) + Ch(a, b, c) + 0x72be5d74 + W[12]; > - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; > - t1 = c + e1(h) + Ch(h, a, b) + 0x80deb1fe + W[13]; > - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; > - t1 = b + e1(g) + Ch(g, h, a) + 0x9bdc06a7 + W[14]; > - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; > - t1 = a + e1(f) + Ch(f, g, h) + 0xc19bf174 + W[15]; > - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; > - > - t1 = h + e1(e) + Ch(e, f, g) + 0xe49b69c1 + W[16]; > - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; > - t1 = g + e1(d) + Ch(d, e, f) + 0xefbe4786 + W[17]; > - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; > - t1 = f + e1(c) + Ch(c, d, e) + 0x0fc19dc6 + W[18]; > - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; > - t1 = e + e1(b) + Ch(b, c, d) + 0x240ca1cc + W[19]; > - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; > - t1 = d + e1(a) + Ch(a, b, c) + 0x2de92c6f + W[20]; > - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; > - t1 = c + e1(h) + Ch(h, a, b) + 0x4a7484aa + W[21]; > - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; > - t1 = b + e1(g) + Ch(g, h, a) + 0x5cb0a9dc + W[22]; > - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; > - t1 = a + e1(f) + Ch(f, g, h) + 0x76f988da + W[23]; > - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; > - > - t1 = h + e1(e) + Ch(e, f, g) + 0x983e5152 + W[24]; > - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; > - t1 = g + e1(d) + Ch(d, e, f) + 0xa831c66d + W[25]; > - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; > - t1 = f + e1(c) + Ch(c, d, e) + 0xb00327c8 + W[26]; > - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; > - t1 = e + e1(b) + Ch(b, c, d) + 0xbf597fc7 + W[27]; > - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; > - t1 = d + e1(a) + Ch(a, b, c) + 0xc6e00bf3 + W[28]; > - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; > - t1 = c + e1(h) + Ch(h, a, b) + 0xd5a79147 + W[29]; > - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; > - t1 = b + e1(g) + Ch(g, h, a) + 0x06ca6351 + W[30]; > - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; > - t1 = a + e1(f) + Ch(f, g, h) + 0x14292967 + W[31]; > - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; > - > - t1 = h + e1(e) + Ch(e, f, g) + 0x27b70a85 + W[32]; > - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; > - t1 = g + e1(d) + Ch(d, e, f) + 0x2e1b2138 + W[33]; > - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; > - t1 = f + e1(c) + Ch(c, d, e) + 0x4d2c6dfc + W[34]; > - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; > - t1 = e + e1(b) + Ch(b, c, d) + 0x53380d13 + W[35]; > - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; > - t1 = d + e1(a) + Ch(a, b, c) + 0x650a7354 + W[36]; > - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; > - t1 = c + e1(h) + Ch(h, a, b) + 0x766a0abb + W[37]; > - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; > - t1 = b + e1(g) + Ch(g, h, a) + 0x81c2c92e + W[38]; > - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; > - t1 = a + e1(f) + Ch(f, g, h) + 0x92722c85 + W[39]; > - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; > - > - t1 = h + e1(e) + Ch(e, f, g) + 0xa2bfe8a1 + W[40]; > - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; > - t1 = g + e1(d) + Ch(d, e, f) + 0xa81a664b + W[41]; > - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; > - t1 = f + e1(c) + Ch(c, d, e) + 0xc24b8b70 + W[42]; > - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; > - t1 = e + e1(b) + Ch(b, c, d) + 0xc76c51a3 + W[43]; > - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; > - t1 = d + e1(a) + Ch(a, b, c) + 0xd192e819 + W[44]; > - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; > - t1 = c + e1(h) + Ch(h, a, b) + 0xd6990624 + W[45]; > - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; > - t1 = b + e1(g) + Ch(g, h, a) + 0xf40e3585 + W[46]; > - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; > - t1 = a + e1(f) + Ch(f, g, h) + 0x106aa070 + W[47]; > - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; > - > - t1 = h + e1(e) + Ch(e, f, g) + 0x19a4c116 + W[48]; > - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; > - t1 = g + e1(d) + Ch(d, e, f) + 0x1e376c08 + W[49]; > - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; > - t1 = f + e1(c) + Ch(c, d, e) + 0x2748774c + W[50]; > - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; > - t1 = e + e1(b) + Ch(b, c, d) + 0x34b0bcb5 + W[51]; > - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; > - t1 = d + e1(a) + Ch(a, b, c) + 0x391c0cb3 + W[52]; > - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; > - t1 = c + e1(h) + Ch(h, a, b) + 0x4ed8aa4a + W[53]; > - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; > - t1 = b + e1(g) + Ch(g, h, a) + 0x5b9cca4f + W[54]; > - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; > - t1 = a + e1(f) + Ch(f, g, h) + 0x682e6ff3 + W[55]; > - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; > - > - t1 = h + e1(e) + Ch(e, f, g) + 0x748f82ee + W[56]; > - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; > - t1 = g + e1(d) + Ch(d, e, f) + 0x78a5636f + W[57]; > - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; > - t1 = f + e1(c) + Ch(c, d, e) + 0x84c87814 + W[58]; > - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; > - t1 = e + e1(b) + Ch(b, c, d) + 0x8cc70208 + W[59]; > - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; > - t1 = d + e1(a) + Ch(a, b, c) + 0x90befffa + W[60]; > - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; > - t1 = c + e1(h) + Ch(h, a, b) + 0xa4506ceb + W[61]; > - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; > - t1 = b + e1(g) + Ch(g, h, a) + 0xbef9a3f7 + W[62]; > - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; > - t1 = a + e1(f) + Ch(f, g, h) + 0xc67178f2 + W[63]; > - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; > + for (i = 0; i < 64; i += 8) { > + SHA256_ROUND(i + 0, a, b, c, d, e, f, g, h); > + SHA256_ROUND(i + 1, h, a, b, c, d, e, f, g); > + SHA256_ROUND(i + 2, g, h, a, b, c, d, e, f); > + SHA256_ROUND(i + 3, f, g, h, a, b, c, d, e); > + SHA256_ROUND(i + 4, e, f, g, h, a, b, c, d); > + SHA256_ROUND(i + 5, d, e, f, g, h, a, b, c); > + SHA256_ROUND(i + 6, c, d, e, f, g, h, a, b); > + SHA256_ROUND(i + 7, b, c, d, e, f, g, h, a); > + } > > state[0] += a; state[1] += b; state[2] += c; state[3] += d; > state[4] += e; state[5] += f; state[6] += g; state[7] += h; > -- > 2.26.2 >
diff --git a/lib/crypto/sha256.c b/lib/crypto/sha256.c index c6bfeacc5b81..e2e29d9b0ccd 100644 --- a/lib/crypto/sha256.c +++ b/lib/crypto/sha256.c @@ -18,6 +18,25 @@ #include <crypto/sha.h> #include <asm/unaligned.h> +static const u32 SHA256_K[] = { + 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, + 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, + 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, + 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, + 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, + 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, + 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, + 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, + 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, + 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, + 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, + 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, + 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, + 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, + 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, + 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2, +}; + static inline u32 Ch(u32 x, u32 y, u32 z) { return z ^ (x & (y ^ z)); @@ -43,9 +62,17 @@ static inline void BLEND_OP(int I, u32 *W) W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16]; } +#define SHA256_ROUND(i, a, b, c, d, e, f, g, h) do { \ + u32 t1, t2; \ + t1 = h + e1(e) + Ch(e, f, g) + SHA256_K[i] + W[i]; \ + t2 = e0(a) + Maj(a, b, c); \ + d += t1; \ + h = t1 + t2; \ +} while (0) + static void sha256_transform(u32 *state, const u8 *input, u32 *W) { - u32 a, b, c, d, e, f, g, h, t1, t2; + u32 a, b, c, d, e, f, g, h; int i; /* load the input */ @@ -61,141 +88,16 @@ static void sha256_transform(u32 *state, const u8 *input, u32 *W) e = state[4]; f = state[5]; g = state[6]; h = state[7]; /* now iterate */ - t1 = h + e1(e) + Ch(e, f, g) + 0x428a2f98 + W[0]; - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; - t1 = g + e1(d) + Ch(d, e, f) + 0x71374491 + W[1]; - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; - t1 = f + e1(c) + Ch(c, d, e) + 0xb5c0fbcf + W[2]; - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; - t1 = e + e1(b) + Ch(b, c, d) + 0xe9b5dba5 + W[3]; - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; - t1 = d + e1(a) + Ch(a, b, c) + 0x3956c25b + W[4]; - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; - t1 = c + e1(h) + Ch(h, a, b) + 0x59f111f1 + W[5]; - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; - t1 = b + e1(g) + Ch(g, h, a) + 0x923f82a4 + W[6]; - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; - t1 = a + e1(f) + Ch(f, g, h) + 0xab1c5ed5 + W[7]; - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; - - t1 = h + e1(e) + Ch(e, f, g) + 0xd807aa98 + W[8]; - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; - t1 = g + e1(d) + Ch(d, e, f) + 0x12835b01 + W[9]; - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; - t1 = f + e1(c) + Ch(c, d, e) + 0x243185be + W[10]; - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; - t1 = e + e1(b) + Ch(b, c, d) + 0x550c7dc3 + W[11]; - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; - t1 = d + e1(a) + Ch(a, b, c) + 0x72be5d74 + W[12]; - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; - t1 = c + e1(h) + Ch(h, a, b) + 0x80deb1fe + W[13]; - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; - t1 = b + e1(g) + Ch(g, h, a) + 0x9bdc06a7 + W[14]; - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; - t1 = a + e1(f) + Ch(f, g, h) + 0xc19bf174 + W[15]; - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; - - t1 = h + e1(e) + Ch(e, f, g) + 0xe49b69c1 + W[16]; - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; - t1 = g + e1(d) + Ch(d, e, f) + 0xefbe4786 + W[17]; - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; - t1 = f + e1(c) + Ch(c, d, e) + 0x0fc19dc6 + W[18]; - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; - t1 = e + e1(b) + Ch(b, c, d) + 0x240ca1cc + W[19]; - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; - t1 = d + e1(a) + Ch(a, b, c) + 0x2de92c6f + W[20]; - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; - t1 = c + e1(h) + Ch(h, a, b) + 0x4a7484aa + W[21]; - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; - t1 = b + e1(g) + Ch(g, h, a) + 0x5cb0a9dc + W[22]; - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; - t1 = a + e1(f) + Ch(f, g, h) + 0x76f988da + W[23]; - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; - - t1 = h + e1(e) + Ch(e, f, g) + 0x983e5152 + W[24]; - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; - t1 = g + e1(d) + Ch(d, e, f) + 0xa831c66d + W[25]; - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; - t1 = f + e1(c) + Ch(c, d, e) + 0xb00327c8 + W[26]; - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; - t1 = e + e1(b) + Ch(b, c, d) + 0xbf597fc7 + W[27]; - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; - t1 = d + e1(a) + Ch(a, b, c) + 0xc6e00bf3 + W[28]; - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; - t1 = c + e1(h) + Ch(h, a, b) + 0xd5a79147 + W[29]; - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; - t1 = b + e1(g) + Ch(g, h, a) + 0x06ca6351 + W[30]; - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; - t1 = a + e1(f) + Ch(f, g, h) + 0x14292967 + W[31]; - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; - - t1 = h + e1(e) + Ch(e, f, g) + 0x27b70a85 + W[32]; - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; - t1 = g + e1(d) + Ch(d, e, f) + 0x2e1b2138 + W[33]; - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; - t1 = f + e1(c) + Ch(c, d, e) + 0x4d2c6dfc + W[34]; - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; - t1 = e + e1(b) + Ch(b, c, d) + 0x53380d13 + W[35]; - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; - t1 = d + e1(a) + Ch(a, b, c) + 0x650a7354 + W[36]; - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; - t1 = c + e1(h) + Ch(h, a, b) + 0x766a0abb + W[37]; - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; - t1 = b + e1(g) + Ch(g, h, a) + 0x81c2c92e + W[38]; - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; - t1 = a + e1(f) + Ch(f, g, h) + 0x92722c85 + W[39]; - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; - - t1 = h + e1(e) + Ch(e, f, g) + 0xa2bfe8a1 + W[40]; - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; - t1 = g + e1(d) + Ch(d, e, f) + 0xa81a664b + W[41]; - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; - t1 = f + e1(c) + Ch(c, d, e) + 0xc24b8b70 + W[42]; - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; - t1 = e + e1(b) + Ch(b, c, d) + 0xc76c51a3 + W[43]; - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; - t1 = d + e1(a) + Ch(a, b, c) + 0xd192e819 + W[44]; - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; - t1 = c + e1(h) + Ch(h, a, b) + 0xd6990624 + W[45]; - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; - t1 = b + e1(g) + Ch(g, h, a) + 0xf40e3585 + W[46]; - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; - t1 = a + e1(f) + Ch(f, g, h) + 0x106aa070 + W[47]; - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; - - t1 = h + e1(e) + Ch(e, f, g) + 0x19a4c116 + W[48]; - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; - t1 = g + e1(d) + Ch(d, e, f) + 0x1e376c08 + W[49]; - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; - t1 = f + e1(c) + Ch(c, d, e) + 0x2748774c + W[50]; - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; - t1 = e + e1(b) + Ch(b, c, d) + 0x34b0bcb5 + W[51]; - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; - t1 = d + e1(a) + Ch(a, b, c) + 0x391c0cb3 + W[52]; - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; - t1 = c + e1(h) + Ch(h, a, b) + 0x4ed8aa4a + W[53]; - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; - t1 = b + e1(g) + Ch(g, h, a) + 0x5b9cca4f + W[54]; - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; - t1 = a + e1(f) + Ch(f, g, h) + 0x682e6ff3 + W[55]; - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; - - t1 = h + e1(e) + Ch(e, f, g) + 0x748f82ee + W[56]; - t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2; - t1 = g + e1(d) + Ch(d, e, f) + 0x78a5636f + W[57]; - t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2; - t1 = f + e1(c) + Ch(c, d, e) + 0x84c87814 + W[58]; - t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2; - t1 = e + e1(b) + Ch(b, c, d) + 0x8cc70208 + W[59]; - t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2; - t1 = d + e1(a) + Ch(a, b, c) + 0x90befffa + W[60]; - t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2; - t1 = c + e1(h) + Ch(h, a, b) + 0xa4506ceb + W[61]; - t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2; - t1 = b + e1(g) + Ch(g, h, a) + 0xbef9a3f7 + W[62]; - t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2; - t1 = a + e1(f) + Ch(f, g, h) + 0xc67178f2 + W[63]; - t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2; + for (i = 0; i < 64; i += 8) { + SHA256_ROUND(i + 0, a, b, c, d, e, f, g, h); + SHA256_ROUND(i + 1, h, a, b, c, d, e, f, g); + SHA256_ROUND(i + 2, g, h, a, b, c, d, e, f); + SHA256_ROUND(i + 3, f, g, h, a, b, c, d, e); + SHA256_ROUND(i + 4, e, f, g, h, a, b, c, d); + SHA256_ROUND(i + 5, d, e, f, g, h, a, b, c); + SHA256_ROUND(i + 6, c, d, e, f, g, h, a, b); + SHA256_ROUND(i + 7, b, c, d, e, f, g, h, a); + } state[0] += a; state[1] += b; state[2] += c; state[3] += d; state[4] += e; state[5] += f; state[6] += g; state[7] += h;