add RIPEMD-160

.github/workflows/linux.yml

@@ -18,4 +18,4 @@ jobs:
         cd v
         make
     - name: test algorithms
-      run: ./v/v test md4/ tea/ xtea/ _cipher/ salsa20/
+      run: ./v/v test md4/ tea/ xtea/ _cipher/ salsa20/ ripemd160/

.github/workflows/win.yml

@@ -18,4 +18,4 @@ jobs:
         cd v
         .\make.bat -tcc
     - name: test algorithms
-      run: ./v/v test md4/ tea/ xtea/ _cipher/ salsa20/
+      run: ./v/v test md4/ tea/ xtea/ _cipher/ salsa20/ ripemd160/

README.md

@@ -79,14 +79,14 @@ The V wrapper libsodium [[Git](https://github.com/vlang/libsodium)] has some of
 | HC-(128,256) | symmetric stream cipher | moderate | :x: |
 | Kyber(512,1024) | key encapsulation mechanism, post-quanten crypto | low | :x: |
 | MD4 | legacy hash-algorithm | low | experimental :yellow_circle: [[Git](https://github.com/bstnbuck/V-crypto/tree/main/md4)] |
-| **RIPEMD160** | legacy hash-algorithm | moderate | :x: |
+| **RIPEMD160** | legacy hash-algorithm | moderate | experimental :yellow_circle: [[Git](https://github.com/bstnbuck/V-crypto/tree/main/ripemd160)] |
 | **(X)Salsa20** | symmetric stream cipher | high | experimental :yellow_circle: [[Git](https://github.com/bstnbuck/V-crypto/tree/main/salsa20)] |
 | **scrypt** | hash-algorithm / key derivation function | high | :x: |
 | TEA, XTEA | legacy block cipher | low | experimental :yellow_circle: [[Git](https://github.com/bstnbuck/V-crypto/tree/main/tea)] [[Git](https://github.com/bstnbuck/V-crypto/tree/main/xtea)]|
 | **Twofisch** | symmetric block cipher | moderate | :x: |
 | **yescrypt** | hash-algorithm / key derivation function | high | :x: |
 
-> Last Update: 20-04-2024
+> Last Update: 22-04-2024
 ---
 ## v_crypto
 ### Installation

ripemd160/ripemd160.v

@@ -0,0 +1,162 @@
+// Based on: https://github.com/golang/crypto/blob/master/ripemd160/ripemd160.go
+
+// Package ripemd160 implements the RIPEMD-160 hash algorithm.
+//
+// Deprecated: RIPEMD-160 is a legacy hash and should not be used for new
+// applications. Instead, use a modern hash like SHA-256 (from crypto/sha256).
+module ripemd160
+
+// RIPEMD-160 is designed by Hans Dobbertin, Antoon Bosselaers, and Bart
+// Preneel with specifications available at:
+// http://homes.esat.kuleuven.be/~cosicart/pdf/AB-9601/AB-9601.pdf.
+
+// The size of the checksum in bytes.
+const size = 20
+
+// The block size of the hash algorithm in bytes.
+const block_size = 64
+
+const _s0 = u32(0x67452301)
+const _s1 = u32(0xefcdab89)
+const _s2 = u32(0x98badcfe)
+const _s3 = u32(0x10325476)
+const _s4 = u32(0xc3d2e1f0)
+
+// vfmt off
+
+// Digest represents the partial evaluation of a checksum.
+struct Digest {
+mut:
+	s []u32 // running context
+	x []u8	// temporary buffer
+	nx int	// index into x
+	tc u64	// total count of bytes processed
+}
+
+// vfmt on
+
+// free the resources taken by the Digest `d`
+@[unsafe]
+pub fn (mut d Digest) free() {
+	$if prealloc {
+		return
+	}
+	unsafe { d.x.free() }
+}
+
+fn (mut d Digest) init() {
+	d.s = []u32{len: 5}
+	d.x = []u8{len: ripemd160.block_size}
+	d.reset()
+}
+
+// reset the state of the Digest `d`
+pub fn (mut d Digest) reset() {
+	d.s[0] = u32(ripemd160._s0)
+	d.s[1] = u32(ripemd160._s1)
+	d.s[2] = u32(ripemd160._s2)
+	d.s[3] = u32(ripemd160._s3)
+	d.s[4] = u32(ripemd160._s4)
+	d.nx = 0
+	d.tc = 0
+}
+
+fn (d &Digest) clone() &Digest {
+	return &Digest{
+		...d
+		s: d.s.clone()
+		x: d.x.clone()
+	}
+}
+
+// new returns a new Digest (implementing hash.Hash) computing the MD5 checksum.
+pub fn new() &Digest {
+	mut d := &Digest{}
+	d.init()
+	return d
+}
+
+// size returns the size of the checksum in bytes.
+pub fn (d &Digest) size() int {
+	return ripemd160.size
+}
+
+// block_size returns the block size of the checksum in bytes.
+pub fn (d &Digest) block_size() int {
+	return ripemd160.block_size
+}
+
+// hexhash returns a hexadecimal RIPEMD-160 hash sum `string` of `s`.
+pub fn hexhash(s string) string {
+	mut d := new()
+	d.init()
+	d.write(s.bytes()) or { panic(err) }
+	return d.sum([]).hex()
+}
+
+// write writes the contents of `p_` to the internal hash representation.
+pub fn (mut d Digest) write(p_ []u8) !int {
+	unsafe {
+		mut p := p_
+		mut nn := p.len
+		d.tc += u64(nn)
+		if d.nx > 0 {
+			mut n := p.len
+			if n > ripemd160.block_size - d.nx {
+				n = ripemd160.block_size - d.nx
+			}
+			for i := 0; i < n; i++ {
+				d.x[d.nx + i] = p[i]
+			}
+			d.nx += n
+			if d.nx == ripemd160.block_size {
+				block(mut d, d.x[0..])
+				d.nx = 0
+			}
+			p = p[n..]
+		}
+		n := block(mut d, p)
+		p = p[n..]
+		if p.len > 0 {
+			d.nx = copy(mut d.x[..], p)
+		}
+		return nn
+	}
+}
+
+// sum returns the RIPEMD-160 sum of the bytes in `inp`.
+pub fn (d0 &Digest) sum(inp []u8) []u8 {
+	// Make a copy of d0 so that caller can keep writing and summing.
+	mut d := d0.clone()
+
+	// Padding.  Add a 1 bit and 0 bits until 56 bytes mod 64.
+	mut tc := d.tc
+
+	mut tmp := []u8{len: 64}
+	tmp[0] = 0x80
+	if tc % 64 < 56 {
+		d.write(tmp[0..56 - tc % 64]) or { panic(err) }
+	} else {
+		d.write(tmp[0..64 + 56 - tc % 64]) or { panic(err) }
+	}
+
+	// Length in bits.
+	tc <<= 3
+	for i := u16(0); i < 8; i++ {
+		tmp[i] = u8(tc >> (8 * i))
+	}
+	d.write(tmp[0..8]) or { panic(err) }
+
+	if d.nx != 0 {
+		panic('v_crypto/ripemd160: d.nx != 0: ${d.nx}')
+	}
+
+	mut digest := []u8{len: ripemd160.size}
+	for i, s in d.s {
+		digest[i * 4] = u8(s)
+		digest[i * 4 + 1] = u8(s >> 8)
+		digest[i * 4 + 2] = u8(s >> 16)
+		digest[i * 4 + 3] = u8(s >> 24)
+	}
+	return digest
+}

ripemd160/ripemd160_test.v

@@ -0,0 +1,49 @@
+module ripemd160
+
+fn test_blocksize() {
+	mut d := new()
+	d.init()
+	assert d.block_size() == 64
+}
+
+fn test_size() {
+	mut d := new()
+	d.init()
+	assert d.size() == 20
+}
+
+fn test_ripemd160_hexhash() {
+	assert hexhash('') == '9c1185a5c5e9fc54612808977ee8f548b2258d31'
+	assert hexhash('message digest') == '5d0689ef49d2fae572b881b123a85ffa21595f36'
+}
+
+fn test_ripemd160_full() {
+	mut d := new()
+	d.init()
+	d.write(''.bytes()) or { assert false }
+	assert d.sum([]).hex() == '9c1185a5c5e9fc54612808977ee8f548b2258d31'
+
+	d.reset()
+
+	d.write('a'.bytes()) or { assert false }
+	assert d.sum([]).hex() == '0bdc9d2d256b3ee9daae347be6f4dc835a467ffe'
+
+	d.reset()
+
+	d.write('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'.bytes()) or {
+		assert false
+	}
+	assert d.sum([]).hex() == 'b0e20b6e3116640286ed3a87a5713079b21f5189'
+
+	d.reset()
+
+	d.write('12345678901234567890123456789012345678901234567890123456789012345678901234567890'.bytes()) or {
+		assert false
+	}
+	assert d.sum([]).hex() == '9b752e45573d4b39f4dbd3323cab82bf63326bfb'
+
+	d.reset()
+
+	d.write('Hello from v_crypto RIPEMD-160 implemented in pure V!'.bytes()) or { assert false }
+	assert d.sum([]).hex() == '0d33ed8a6a5dc2bdcab081cecadd2fad0cb35ed8'
+}