From f5c4671bfbad96bf346bd7e9a21fc4317b4959df Mon Sep 17 00:00:00 2001
From: Indrajith K L
Date: Sat, 3 Dec 2022 17:00:20 +0530
Subject: Adds most of the tools

---
 v_windows/v/vlib/crypto/sha512/sha512.v | 324 ++++++++++++++++++++++++++++++++
 1 file changed, 324 insertions(+)
 create mode 100644 v_windows/v/vlib/crypto/sha512/sha512.v

(limited to 'v_windows/v/vlib/crypto/sha512/sha512.v')

diff --git a/v_windows/v/vlib/crypto/sha512/sha512.v b/v_windows/v/vlib/crypto/sha512/sha512.v
new file mode 100644
index 0000000..dd5d3a9
--- /dev/null
+++ b/v_windows/v/vlib/crypto/sha512/sha512.v
@@ -0,0 +1,324 @@
+// 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()
+}
-- 
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