2017-03-02 22:39:41 +01:00
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// Copyright 2013 The Go Authors. All rights reserved.
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2015-03-24 08:04:45 +01:00
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// SHA256 block routine. See sha256block.go for Go equivalent.
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//
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// The algorithm is detailed in FIPS 180-4:
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//
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// http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
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//
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// Wt = Mt; for 0 <= t <= 15
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// Wt = SIGMA1(Wt-2) + SIGMA0(Wt-15) + Wt-16; for 16 <= t <= 63
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//
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// a = H0
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// b = H1
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// c = H2
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// d = H3
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// e = H4
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// f = H5
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// g = H6
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// h = H7
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//
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// for t = 0 to 63 {
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// T1 = h + BIGSIGMA1(e) + Ch(e,f,g) + Kt + Wt
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// T2 = BIGSIGMA0(a) + Maj(a,b,c)
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// h = g
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// g = f
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// f = e
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// e = d + T1
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// d = c
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// c = b
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// b = a
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// a = T1 + T2
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// }
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//
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// H0 = a + H0
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// H1 = b + H1
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// H2 = c + H2
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// H3 = d + H3
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// H4 = e + H4
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// H5 = f + H5
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// H6 = g + H6
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// H7 = h + H7
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// Wt = Mt; for 0 <= t <= 15
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#define MSGSCHEDULE0(index) \
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MOVL (index*4)(SI), AX; \
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BSWAPL AX; \
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MOVL AX, (index*4)(BP)
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// Wt = SIGMA1(Wt-2) + Wt-7 + SIGMA0(Wt-15) + Wt-16; for 16 <= t <= 63
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// SIGMA0(x) = ROTR(7,x) XOR ROTR(18,x) XOR SHR(3,x)
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// SIGMA1(x) = ROTR(17,x) XOR ROTR(19,x) XOR SHR(10,x)
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#define MSGSCHEDULE1(index) \
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MOVL ((index-2)*4)(BP), AX; \
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MOVL AX, CX; \
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RORL $17, AX; \
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MOVL CX, DX; \
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RORL $19, CX; \
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SHRL $10, DX; \
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MOVL ((index-15)*4)(BP), BX; \
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XORL CX, AX; \
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MOVL BX, CX; \
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XORL DX, AX; \
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RORL $7, BX; \
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MOVL CX, DX; \
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SHRL $3, DX; \
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RORL $18, CX; \
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ADDL ((index-7)*4)(BP), AX; \
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XORL CX, BX; \
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XORL DX, BX; \
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ADDL ((index-16)*4)(BP), BX; \
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ADDL BX, AX; \
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MOVL AX, ((index)*4)(BP)
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// Calculate T1 in AX - uses AX, BX, CX and DX registers.
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// Wt is passed in AX.
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// T1 = h + BIGSIGMA1(e) + Ch(e, f, g) + Kt + Wt
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// BIGSIGMA1(x) = ROTR(6,x) XOR ROTR(11,x) XOR ROTR(25,x)
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// Ch(x, y, z) = (x AND y) XOR (NOT x AND z)
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#define SHA256T1(const, e, f, g, h) \
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MOVL (h*4)(DI), BX; \
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ADDL AX, BX; \
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MOVL (e*4)(DI), AX; \
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ADDL $const, BX; \
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MOVL (e*4)(DI), CX; \
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RORL $6, AX; \
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MOVL (e*4)(DI), DX; \
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RORL $11, CX; \
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XORL CX, AX; \
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MOVL (e*4)(DI), CX; \
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RORL $25, DX; \
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ANDL (f*4)(DI), CX; \
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XORL AX, DX; \
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MOVL (e*4)(DI), AX; \
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NOTL AX; \
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ADDL DX, BX; \
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ANDL (g*4)(DI), AX; \
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XORL CX, AX; \
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ADDL BX, AX
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// Calculate T2 in BX - uses AX, BX, CX and DX registers.
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// T2 = BIGSIGMA0(a) + Maj(a, b, c)
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// BIGSIGMA0(x) = ROTR(2,x) XOR ROTR(13,x) XOR ROTR(22,x)
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// Maj(x, y, z) = (x AND y) XOR (x AND z) XOR (y AND z)
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#define SHA256T2(a, b, c) \
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MOVL (a*4)(DI), AX; \
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MOVL (c*4)(DI), BX; \
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RORL $2, AX; \
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MOVL (a*4)(DI), DX; \
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ANDL (b*4)(DI), BX; \
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RORL $13, DX; \
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MOVL (a*4)(DI), CX; \
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ANDL (c*4)(DI), CX; \
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XORL DX, AX; \
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XORL CX, BX; \
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MOVL (a*4)(DI), DX; \
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MOVL (b*4)(DI), CX; \
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RORL $22, DX; \
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ANDL (a*4)(DI), CX; \
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XORL CX, BX; \
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XORL DX, AX; \
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ADDL AX, BX
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// Calculate T1 and T2, then e = d + T1 and a = T1 + T2.
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// The values for e and a are stored in d and h, ready for rotation.
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#define SHA256ROUND(index, const, a, b, c, d, e, f, g, h) \
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SHA256T1(const, e, f, g, h); \
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MOVL AX, 292(SP); \
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SHA256T2(a, b, c); \
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MOVL 292(SP), AX; \
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ADDL AX, BX; \
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ADDL AX, (d*4)(DI); \
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MOVL BX, (h*4)(DI)
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#define SHA256ROUND0(index, const, a, b, c, d, e, f, g, h) \
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MSGSCHEDULE0(index); \
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SHA256ROUND(index, const, a, b, c, d, e, f, g, h)
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#define SHA256ROUND1(index, const, a, b, c, d, e, f, g, h) \
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MSGSCHEDULE1(index); \
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SHA256ROUND(index, const, a, b, c, d, e, f, g, h)
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2017-03-02 22:39:41 +01:00
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TEXT ·block(SB),0,$296-16
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2015-03-24 08:04:45 +01:00
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MOVL p_base+4(FP), SI
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MOVL p_len+8(FP), DX
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SHRL $6, DX
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SHLL $6, DX
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LEAL (SI)(DX*1), DI
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MOVL DI, 288(SP)
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CMPL SI, DI
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JEQ end
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LEAL 256(SP), DI // variables
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MOVL dig+0(FP), BP
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MOVL (0*4)(BP), AX // a = H0
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MOVL AX, (0*4)(DI)
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MOVL (1*4)(BP), BX // b = H1
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MOVL BX, (1*4)(DI)
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MOVL (2*4)(BP), CX // c = H2
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MOVL CX, (2*4)(DI)
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MOVL (3*4)(BP), DX // d = H3
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MOVL DX, (3*4)(DI)
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MOVL (4*4)(BP), AX // e = H4
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MOVL AX, (4*4)(DI)
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MOVL (5*4)(BP), BX // f = H5
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MOVL BX, (5*4)(DI)
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MOVL (6*4)(BP), CX // g = H6
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MOVL CX, (6*4)(DI)
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MOVL (7*4)(BP), DX // h = H7
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MOVL DX, (7*4)(DI)
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loop:
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MOVL SP, BP // message schedule
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SHA256ROUND0(0, 0x428a2f98, 0, 1, 2, 3, 4, 5, 6, 7)
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SHA256ROUND0(1, 0x71374491, 7, 0, 1, 2, 3, 4, 5, 6)
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SHA256ROUND0(2, 0xb5c0fbcf, 6, 7, 0, 1, 2, 3, 4, 5)
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SHA256ROUND0(3, 0xe9b5dba5, 5, 6, 7, 0, 1, 2, 3, 4)
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SHA256ROUND0(4, 0x3956c25b, 4, 5, 6, 7, 0, 1, 2, 3)
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SHA256ROUND0(5, 0x59f111f1, 3, 4, 5, 6, 7, 0, 1, 2)
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SHA256ROUND0(6, 0x923f82a4, 2, 3, 4, 5, 6, 7, 0, 1)
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SHA256ROUND0(7, 0xab1c5ed5, 1, 2, 3, 4, 5, 6, 7, 0)
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SHA256ROUND0(8, 0xd807aa98, 0, 1, 2, 3, 4, 5, 6, 7)
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SHA256ROUND0(9, 0x12835b01, 7, 0, 1, 2, 3, 4, 5, 6)
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SHA256ROUND0(10, 0x243185be, 6, 7, 0, 1, 2, 3, 4, 5)
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SHA256ROUND0(11, 0x550c7dc3, 5, 6, 7, 0, 1, 2, 3, 4)
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SHA256ROUND0(12, 0x72be5d74, 4, 5, 6, 7, 0, 1, 2, 3)
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SHA256ROUND0(13, 0x80deb1fe, 3, 4, 5, 6, 7, 0, 1, 2)
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SHA256ROUND0(14, 0x9bdc06a7, 2, 3, 4, 5, 6, 7, 0, 1)
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SHA256ROUND0(15, 0xc19bf174, 1, 2, 3, 4, 5, 6, 7, 0)
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SHA256ROUND1(16, 0xe49b69c1, 0, 1, 2, 3, 4, 5, 6, 7)
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SHA256ROUND1(17, 0xefbe4786, 7, 0, 1, 2, 3, 4, 5, 6)
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SHA256ROUND1(18, 0x0fc19dc6, 6, 7, 0, 1, 2, 3, 4, 5)
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SHA256ROUND1(19, 0x240ca1cc, 5, 6, 7, 0, 1, 2, 3, 4)
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SHA256ROUND1(20, 0x2de92c6f, 4, 5, 6, 7, 0, 1, 2, 3)
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SHA256ROUND1(21, 0x4a7484aa, 3, 4, 5, 6, 7, 0, 1, 2)
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SHA256ROUND1(22, 0x5cb0a9dc, 2, 3, 4, 5, 6, 7, 0, 1)
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SHA256ROUND1(23, 0x76f988da, 1, 2, 3, 4, 5, 6, 7, 0)
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SHA256ROUND1(24, 0x983e5152, 0, 1, 2, 3, 4, 5, 6, 7)
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SHA256ROUND1(25, 0xa831c66d, 7, 0, 1, 2, 3, 4, 5, 6)
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SHA256ROUND1(26, 0xb00327c8, 6, 7, 0, 1, 2, 3, 4, 5)
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SHA256ROUND1(27, 0xbf597fc7, 5, 6, 7, 0, 1, 2, 3, 4)
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SHA256ROUND1(28, 0xc6e00bf3, 4, 5, 6, 7, 0, 1, 2, 3)
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SHA256ROUND1(29, 0xd5a79147, 3, 4, 5, 6, 7, 0, 1, 2)
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SHA256ROUND1(30, 0x06ca6351, 2, 3, 4, 5, 6, 7, 0, 1)
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SHA256ROUND1(31, 0x14292967, 1, 2, 3, 4, 5, 6, 7, 0)
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SHA256ROUND1(32, 0x27b70a85, 0, 1, 2, 3, 4, 5, 6, 7)
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SHA256ROUND1(33, 0x2e1b2138, 7, 0, 1, 2, 3, 4, 5, 6)
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SHA256ROUND1(34, 0x4d2c6dfc, 6, 7, 0, 1, 2, 3, 4, 5)
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SHA256ROUND1(35, 0x53380d13, 5, 6, 7, 0, 1, 2, 3, 4)
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SHA256ROUND1(36, 0x650a7354, 4, 5, 6, 7, 0, 1, 2, 3)
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SHA256ROUND1(37, 0x766a0abb, 3, 4, 5, 6, 7, 0, 1, 2)
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SHA256ROUND1(38, 0x81c2c92e, 2, 3, 4, 5, 6, 7, 0, 1)
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SHA256ROUND1(39, 0x92722c85, 1, 2, 3, 4, 5, 6, 7, 0)
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SHA256ROUND1(40, 0xa2bfe8a1, 0, 1, 2, 3, 4, 5, 6, 7)
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SHA256ROUND1(41, 0xa81a664b, 7, 0, 1, 2, 3, 4, 5, 6)
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SHA256ROUND1(42, 0xc24b8b70, 6, 7, 0, 1, 2, 3, 4, 5)
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SHA256ROUND1(43, 0xc76c51a3, 5, 6, 7, 0, 1, 2, 3, 4)
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SHA256ROUND1(44, 0xd192e819, 4, 5, 6, 7, 0, 1, 2, 3)
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SHA256ROUND1(45, 0xd6990624, 3, 4, 5, 6, 7, 0, 1, 2)
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SHA256ROUND1(46, 0xf40e3585, 2, 3, 4, 5, 6, 7, 0, 1)
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SHA256ROUND1(47, 0x106aa070, 1, 2, 3, 4, 5, 6, 7, 0)
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SHA256ROUND1(48, 0x19a4c116, 0, 1, 2, 3, 4, 5, 6, 7)
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SHA256ROUND1(49, 0x1e376c08, 7, 0, 1, 2, 3, 4, 5, 6)
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SHA256ROUND1(50, 0x2748774c, 6, 7, 0, 1, 2, 3, 4, 5)
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SHA256ROUND1(51, 0x34b0bcb5, 5, 6, 7, 0, 1, 2, 3, 4)
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SHA256ROUND1(52, 0x391c0cb3, 4, 5, 6, 7, 0, 1, 2, 3)
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SHA256ROUND1(53, 0x4ed8aa4a, 3, 4, 5, 6, 7, 0, 1, 2)
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SHA256ROUND1(54, 0x5b9cca4f, 2, 3, 4, 5, 6, 7, 0, 1)
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SHA256ROUND1(55, 0x682e6ff3, 1, 2, 3, 4, 5, 6, 7, 0)
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SHA256ROUND1(56, 0x748f82ee, 0, 1, 2, 3, 4, 5, 6, 7)
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SHA256ROUND1(57, 0x78a5636f, 7, 0, 1, 2, 3, 4, 5, 6)
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SHA256ROUND1(58, 0x84c87814, 6, 7, 0, 1, 2, 3, 4, 5)
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SHA256ROUND1(59, 0x8cc70208, 5, 6, 7, 0, 1, 2, 3, 4)
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SHA256ROUND1(60, 0x90befffa, 4, 5, 6, 7, 0, 1, 2, 3)
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SHA256ROUND1(61, 0xa4506ceb, 3, 4, 5, 6, 7, 0, 1, 2)
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SHA256ROUND1(62, 0xbef9a3f7, 2, 3, 4, 5, 6, 7, 0, 1)
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SHA256ROUND1(63, 0xc67178f2, 1, 2, 3, 4, 5, 6, 7, 0)
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MOVL dig+0(FP), BP
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MOVL (0*4)(BP), AX // H0 = a + H0
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ADDL (0*4)(DI), AX
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MOVL AX, (0*4)(DI)
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MOVL AX, (0*4)(BP)
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MOVL (1*4)(BP), BX // H1 = b + H1
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ADDL (1*4)(DI), BX
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MOVL BX, (1*4)(DI)
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MOVL BX, (1*4)(BP)
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MOVL (2*4)(BP), CX // H2 = c + H2
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ADDL (2*4)(DI), CX
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MOVL CX, (2*4)(DI)
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MOVL CX, (2*4)(BP)
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MOVL (3*4)(BP), DX // H3 = d + H3
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ADDL (3*4)(DI), DX
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MOVL DX, (3*4)(DI)
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MOVL DX, (3*4)(BP)
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MOVL (4*4)(BP), AX // H4 = e + H4
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ADDL (4*4)(DI), AX
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MOVL AX, (4*4)(DI)
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MOVL AX, (4*4)(BP)
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MOVL (5*4)(BP), BX // H5 = f + H5
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ADDL (5*4)(DI), BX
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MOVL BX, (5*4)(DI)
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MOVL BX, (5*4)(BP)
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MOVL (6*4)(BP), CX // H6 = g + H6
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ADDL (6*4)(DI), CX
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MOVL CX, (6*4)(DI)
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MOVL CX, (6*4)(BP)
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MOVL (7*4)(BP), DX // H7 = h + H7
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ADDL (7*4)(DI), DX
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MOVL DX, (7*4)(DI)
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MOVL DX, (7*4)(BP)
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ADDL $64, SI
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CMPL SI, 288(SP)
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JB loop
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end:
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RET
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