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diff --git a/v_windows/v/vlib/crypto/sha512/sha512.v b/v_windows/v/vlib/crypto/sha512/sha512.v
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+// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+// Package sha512 implements the SHA-384, SHA-512, SHA-512/224, and SHA-512/256
+// hash algorithms as defined in FIPS 180-4.
+// Based off: https://github.com/golang/go/tree/master/src/crypto/sha512
+// Last commit: https://github.com/golang/go/commit/3ce865d7a0b88714cc433454ae2370a105210c01
+module sha512
+
+import crypto
+import encoding.binary
+
+pub const (
+ // size is the size, in bytes, of a SHA-512 checksum.
+ size = 64
+ // size224 is the size, in bytes, of a SHA-512/224 checksum.
+ size224 = 28
+ // size256 is the size, in bytes, of a SHA-512/256 checksum.
+ size256 = 32
+ // size384 is the size, in bytes, of a SHA-384 checksum.
+ size384 = 48
+ // block_size is the block size, in bytes, of the SHA-512/224,
+ // SHA-512/256, SHA-384 and SHA-512 hash functions.
+ block_size = 128
+)
+
+const (
+ chunk = 128
+ init0 = u64(0x6a09e667f3bcc908)
+ init1 = u64(0xbb67ae8584caa73b)
+ init2 = u64(0x3c6ef372fe94f82b)
+ init3 = u64(0xa54ff53a5f1d36f1)
+ init4 = u64(0x510e527fade682d1)
+ init5 = u64(0x9b05688c2b3e6c1f)
+ init6 = u64(0x1f83d9abfb41bd6b)
+ init7 = u64(0x5be0cd19137e2179)
+ init0_224 = u64(0x8c3d37c819544da2)
+ init1_224 = u64(0x73e1996689dcd4d6)
+ init2_224 = u64(0x1dfab7ae32ff9c82)
+ init3_224 = u64(0x679dd514582f9fcf)
+ init4_224 = u64(0x0f6d2b697bd44da8)
+ init5_224 = u64(0x77e36f7304c48942)
+ init6_224 = u64(0x3f9d85a86a1d36c8)
+ init7_224 = u64(0x1112e6ad91d692a1)
+ init0_256 = u64(0x22312194fc2bf72c)
+ init1_256 = u64(0x9f555fa3c84c64c2)
+ init2_256 = u64(0x2393b86b6f53b151)
+ init3_256 = u64(0x963877195940eabd)
+ init4_256 = u64(0x96283ee2a88effe3)
+ init5_256 = u64(0xbe5e1e2553863992)
+ init6_256 = u64(0x2b0199fc2c85b8aa)
+ init7_256 = u64(0x0eb72ddc81c52ca2)
+ init0_384 = u64(0xcbbb9d5dc1059ed8)
+ init1_384 = u64(0x629a292a367cd507)
+ init2_384 = u64(0x9159015a3070dd17)
+ init3_384 = u64(0x152fecd8f70e5939)
+ init4_384 = u64(0x67332667ffc00b31)
+ init5_384 = u64(0x8eb44a8768581511)
+ init6_384 = u64(0xdb0c2e0d64f98fa7)
+ init7_384 = u64(0x47b5481dbefa4fa4)
+)
+
+// Digest represents the partial evaluation of a checksum.
+struct Digest {
+mut:
+ h []u64
+ x []byte
+ nx int
+ len u64
+ function crypto.Hash
+}
+
+fn (mut d Digest) reset() {
+ d.h = []u64{len: (8)}
+ d.x = []byte{len: sha512.chunk}
+ match d.function {
+ .sha384 {
+ d.h[0] = sha512.init0_384
+ d.h[1] = sha512.init1_384
+ d.h[2] = sha512.init2_384
+ d.h[3] = sha512.init3_384
+ d.h[4] = sha512.init4_384
+ d.h[5] = sha512.init5_384
+ d.h[6] = sha512.init6_384
+ d.h[7] = sha512.init7_384
+ }
+ .sha512_224 {
+ d.h[0] = sha512.init0_224
+ d.h[1] = sha512.init1_224
+ d.h[2] = sha512.init2_224
+ d.h[3] = sha512.init3_224
+ d.h[4] = sha512.init4_224
+ d.h[5] = sha512.init5_224
+ d.h[6] = sha512.init6_224
+ d.h[7] = sha512.init7_224
+ }
+ .sha512_256 {
+ d.h[0] = sha512.init0_256
+ d.h[1] = sha512.init1_256
+ d.h[2] = sha512.init2_256
+ d.h[3] = sha512.init3_256
+ d.h[4] = sha512.init4_256
+ d.h[5] = sha512.init5_256
+ d.h[6] = sha512.init6_256
+ d.h[7] = sha512.init7_256
+ }
+ else {
+ d.h[0] = sha512.init0
+ d.h[1] = sha512.init1
+ d.h[2] = sha512.init2
+ d.h[3] = sha512.init3
+ d.h[4] = sha512.init4
+ d.h[5] = sha512.init5
+ d.h[6] = sha512.init6
+ d.h[7] = sha512.init7
+ }
+ }
+ d.nx = 0
+ d.len = 0
+}
+
+// internal
+fn new_digest(hash crypto.Hash) &Digest {
+ mut d := &Digest{
+ function: hash
+ }
+ d.reset()
+ return d
+}
+
+// new returns a new Digest (implementing hash.Hash) computing the SHA-512 checksum.
+pub fn new() &Digest {
+ return new_digest(.sha512)
+}
+
+// new512_224 returns a new Digest (implementing hash.Hash) computing the SHA-512/224 checksum.
+fn new512_224() &Digest {
+ return new_digest(.sha512_224)
+}
+
+// new512_256 returns a new Digest (implementing hash.Hash) computing the SHA-512/256 checksum.
+fn new512_256() &Digest {
+ return new_digest(.sha512_256)
+}
+
+// new384 returns a new Digest (implementing hash.Hash) computing the SHA-384 checksum.
+fn new384() &Digest {
+ return new_digest(.sha384)
+}
+
+// write writes the contents of `p_` to the internal hash representation.
+fn (mut d Digest) write(p_ []byte) ?int {
+ unsafe {
+ mut p := p_
+ nn := p.len
+ d.len += u64(nn)
+ if d.nx > 0 {
+ n := copy(d.x[d.nx..], p)
+ d.nx += n
+ if d.nx == sha512.chunk {
+ block(mut d, d.x)
+ d.nx = 0
+ }
+ if n >= p.len {
+ p = []
+ } else {
+ p = p[n..]
+ }
+ }
+ if p.len >= sha512.chunk {
+ n := p.len & ~(sha512.chunk - 1)
+ block(mut d, p[..n])
+ if n >= p.len {
+ p = []
+ } else {
+ p = p[n..]
+ }
+ }
+ if p.len > 0 {
+ d.nx = copy(d.x, p)
+ }
+ return nn
+ }
+}
+
+fn (d &Digest) sum(b_in []byte) []byte {
+ // Make a copy of d so that caller can keep writing and summing.
+ mut d0 := *d
+ hash := d0.checksum()
+ mut b_out := b_in.clone()
+ match d0.function {
+ .sha384 {
+ for b in hash[..sha512.size384] {
+ b_out << b
+ }
+ }
+ .sha512_224 {
+ for b in hash[..sha512.size224] {
+ b_out << b
+ }
+ }
+ .sha512_256 {
+ for b in hash[..sha512.size256] {
+ b_out << b
+ }
+ }
+ else {
+ for b in hash {
+ b_out << b
+ }
+ }
+ }
+ return b_out
+}
+
+fn (mut d Digest) checksum() []byte {
+ // Padding. Add a 1 bit and 0 bits until 112 bytes mod 128.
+ mut len := d.len
+ mut tmp := []byte{len: (128)}
+ tmp[0] = 0x80
+ if int(len) % 128 < 112 {
+ d.write(tmp[..112 - int(len) % 128]) or { panic(err) }
+ } else {
+ d.write(tmp[..128 + 112 - int(len) % 128]) or { panic(err) }
+ }
+ // Length in bits.
+ len <<= u64(3)
+ binary.big_endian_put_u64(mut tmp, u64(0)) // upper 64 bits are always zero, because len variable has type u64
+ binary.big_endian_put_u64(mut tmp[8..], len)
+ d.write(tmp[..16]) or { panic(err) }
+ if d.nx != 0 {
+ panic('d.nx != 0')
+ }
+ mut digest := []byte{len: sha512.size}
+ binary.big_endian_put_u64(mut digest, d.h[0])
+ binary.big_endian_put_u64(mut digest[8..], d.h[1])
+ binary.big_endian_put_u64(mut digest[16..], d.h[2])
+ binary.big_endian_put_u64(mut digest[24..], d.h[3])
+ binary.big_endian_put_u64(mut digest[32..], d.h[4])
+ binary.big_endian_put_u64(mut digest[40..], d.h[5])
+ if d.function != .sha384 {
+ binary.big_endian_put_u64(mut digest[48..], d.h[6])
+ binary.big_endian_put_u64(mut digest[56..], d.h[7])
+ }
+ return digest
+}
+
+// sum512 returns the SHA512 checksum of the data.
+pub fn sum512(data []byte) []byte {
+ mut d := new_digest(.sha512)
+ d.write(data) or { panic(err) }
+ return d.checksum()
+}
+
+// sum384 returns the SHA384 checksum of the data.
+pub fn sum384(data []byte) []byte {
+ mut d := new_digest(.sha384)
+ d.write(data) or { panic(err) }
+ sum := d.checksum()
+ sum384 := []byte{len: sha512.size384}
+ copy(sum384, sum[..sha512.size384])
+ return sum384
+}
+
+// sum512_224 returns the Sum512/224 checksum of the data.
+pub fn sum512_224(data []byte) []byte {
+ mut d := new_digest(.sha512_224)
+ d.write(data) or { panic(err) }
+ sum := d.checksum()
+ sum224 := []byte{len: sha512.size224}
+ copy(sum224, sum[..sha512.size224])
+ return sum224
+}
+
+// sum512_256 returns the Sum512/256 checksum of the data.
+pub fn sum512_256(data []byte) []byte {
+ mut d := new_digest(.sha512_256)
+ d.write(data) or { panic(err) }
+ sum := d.checksum()
+ sum256 := []byte{len: sha512.size256}
+ copy(sum256, sum[..sha512.size256])
+ return sum256
+}
+
+fn block(mut dig Digest, p []byte) {
+ // For now just use block_generic until we have specific
+ // architecture optimized versions
+ block_generic(mut dig, p)
+}
+
+// size returns the size of the checksum in bytes.
+pub fn (d &Digest) size() int {
+ match d.function {
+ .sha512_224 { return sha512.size224 }
+ .sha512_256 { return sha512.size256 }
+ .sha384 { return sha512.size384 }
+ else { return sha512.size }
+ }
+}
+
+// block_size returns the block size of the checksum in bytes.
+pub fn (d &Digest) block_size() int {
+ return sha512.block_size
+}
+
+// hexhash returns a hexadecimal SHA512 hash sum `string` of `s`.
+pub fn hexhash(s string) string {
+ return sum512(s.bytes()).hex()
+}
+
+// hexhash_384 returns a hexadecimal SHA384 hash sum `string` of `s`.
+pub fn hexhash_384(s string) string {
+ return sum384(s.bytes()).hex()
+}
+
+// hexhash_512_224 returns a hexadecimal SHA512/224 hash sum `string` of `s`.
+pub fn hexhash_512_224(s string) string {
+ return sum512_224(s.bytes()).hex()
+}
+
+// hexhash_512_256 returns a hexadecimal 512/256 hash sum `string` of `s`.
+pub fn hexhash_512_256(s string) string {
+ return sum512_256(s.bytes()).hex()
+}