diff --git a/vlib/crypto/bcrypt/bcrypt.v b/vlib/crypto/bcrypt/bcrypt.v
index fd95eeead5..80e51258a7 100644
--- a/vlib/crypto/bcrypt/bcrypt.v
+++ b/vlib/crypto/bcrypt/bcrypt.v
@@ -27,8 +27,8 @@ mut:
 	minor string
 }
 
-const magic_cipher_data = [byte(0x4f727068), 0x65616e42, 0x65686f6c, 0x64657253, 0x63727944,
-	0x6f756274]
+const magic_cipher_data = [byte(0x4f), 0x72, 0x70, 0x68, 0x65, 0x61, 0x6e, 0x42, 0x65, 0x68, 0x6f,
+	0x6c, 0x64, 0x65, 0x72, 0x53, 0x63, 0x72, 0x79, 0x44, 0x6f, 0x75, 0x62, 0x74]
 
 pub fn generate_from_password(password []byte, cost int) ?string {
 	mut p := new_from_password(password, cost) or { return error('Error: $err') }
@@ -38,7 +38,8 @@ pub fn generate_from_password(password []byte, cost int) ?string {
 
 pub fn compare_hash_and_password(password []byte, hashed_password []byte) ? {
 	mut p := new_from_hash(hashed_password) or { return error('Error: $err') }
-	p.salt << '=='.bytes()
+	p.salt << `=`
+	p.salt << `=`
 	other_hash := bcrypt(password, p.cost, p.salt) or { return error('err') }
 
 	mut other_p := Hashed{
@@ -132,18 +133,18 @@ fn expensive_blowfish_setup(key []byte, cost u32, salt []byte) ?&blowfish.Blowfi
 
 fn (mut h Hashed) hash_byte() []byte {
 	mut arr := []byte{len: 60, init: 0}
-	arr[0] = '$'.bytes()[0]
-	arr[1] = h.major.bytes()[0]
+	arr[0] = `$`
+	arr[1] = h.major[0]
 	mut n := 2
 	if h.minor != '0' {
-		arr[2] = h.minor.bytes()[0]
+		arr[2] = h.minor[0]
 		n = 3
 	}
-	arr[n] = '$'.bytes()[0]
+	arr[n] = `$`
 	n++
 	copy(arr[n..], '${int(h.cost):02}'.bytes())
 	n += 2
-	arr[n] = '$'.bytes()[0]
+	arr[n] = `$`
 	n++
 	copy(arr[n..], h.salt)
 	n += bcrypt.encoded_salt_size
@@ -153,15 +154,15 @@ fn (mut h Hashed) hash_byte() []byte {
 }
 
 fn (mut h Hashed) decode_version(sbytes []byte) ?int {
-	if sbytes[0] != '$'.bytes()[0] {
+	if sbytes[0] != `$` {
 		return error("bcrypt hashes must start with '$'")
 	}
-	if sbytes[1] != bcrypt.major_version.bytes()[0] {
+	if sbytes[1] != bcrypt.major_version[0] {
 		return error('bcrypt algorithm version $bcrypt.major_version')
 	}
 	h.major = sbytes[1].ascii_str()
 	mut n := 3
-	if sbytes[2] != '$'.bytes()[0] {
+	if sbytes[2] != `$` {
 		h.minor = sbytes[2].ascii_str()
 		n++
 	}
@@ -169,7 +170,7 @@ fn (mut h Hashed) decode_version(sbytes []byte) ?int {
 }
 
 fn (mut h Hashed) decode_cost(sbytes []byte) ?int {
-	cost := string(sbytes[0..2]).int()
+	cost := sbytes[0..2].bytestr().int()
 	check_cost(cost) or { return err }
 	h.cost = cost
 	return 3
diff --git a/vlib/crypto/blowfish/block.v b/vlib/crypto/blowfish/block.v
index 3f848dbeff..a6927b42b5 100644
--- a/vlib/crypto/blowfish/block.v
+++ b/vlib/crypto/blowfish/block.v
@@ -87,37 +87,37 @@ fn encrypt_block(l u32, r u32, mut bf Blowfish) []u32 {
 	mut xr := r
 	xl ^= bf.p[0]
 	xr ^= ((bf.s[0][byte(xl >> 24)] + bf.s[1][byte(xl >> 16)]) ^ bf.s[2][byte(xl >> 8)]) +
-		bf.s[3][byte(xl)] ^ bf.p[1]
+		(bf.s[3][byte(xl)] ^ bf.p[1])
 	xl ^= ((bf.s[0][byte(xr >> 24)] + bf.s[1][byte(xr >> 16)]) ^ bf.s[2][byte(xr >> 8)]) +
-		bf.s[3][byte(xr)] ^ bf.p[2]
+		(bf.s[3][byte(xr)] ^ bf.p[2])
 	xr ^= ((bf.s[0][byte(xl >> 24)] + bf.s[1][byte(xl >> 16)]) ^ bf.s[2][byte(xl >> 8)]) +
-		bf.s[3][byte(xl)] ^ bf.p[3]
+		(bf.s[3][byte(xl)] ^ bf.p[3])
 	xl ^= ((bf.s[0][byte(xr >> 24)] + bf.s[1][byte(xr >> 16)]) ^ bf.s[2][byte(xr >> 8)]) +
-		bf.s[3][byte(xr)] ^ bf.p[4]
+		(bf.s[3][byte(xr)] ^ bf.p[4])
 	xr ^= ((bf.s[0][byte(xl >> 24)] + bf.s[1][byte(xl >> 16)]) ^ bf.s[2][byte(xl >> 8)]) +
-		bf.s[3][byte(xl)] ^ bf.p[5]
+		(bf.s[3][byte(xl)] ^ bf.p[5])
 	xl ^= ((bf.s[0][byte(xr >> 24)] + bf.s[1][byte(xr >> 16)]) ^ bf.s[2][byte(xr >> 8)]) +
-		bf.s[3][byte(xr)] ^ bf.p[6]
+		(bf.s[3][byte(xr)] ^ bf.p[6])
 	xr ^= ((bf.s[0][byte(xl >> 24)] + bf.s[1][byte(xl >> 16)]) ^ bf.s[2][byte(xl >> 8)]) +
-		bf.s[3][byte(xl)] ^ bf.p[7]
+		(bf.s[3][byte(xl)] ^ bf.p[7])
 	xl ^= ((bf.s[0][byte(xr >> 24)] + bf.s[1][byte(xr >> 16)]) ^ bf.s[2][byte(xr >> 8)]) +
-		bf.s[3][byte(xr)] ^ bf.p[8]
+		(bf.s[3][byte(xr)] ^ bf.p[8])
 	xr ^= ((bf.s[0][byte(xl >> 24)] + bf.s[1][byte(xl >> 16)]) ^ bf.s[2][byte(xl >> 8)]) +
-		bf.s[3][byte(xl)] ^ bf.p[9]
+		(bf.s[3][byte(xl)] ^ bf.p[9])
 	xl ^= ((bf.s[0][byte(xr >> 24)] + bf.s[1][byte(xr >> 16)]) ^ bf.s[2][byte(xr >> 8)]) +
-		bf.s[3][byte(xr)] ^ bf.p[10]
+		(bf.s[3][byte(xr)] ^ bf.p[10])
 	xr ^= ((bf.s[0][byte(xl >> 24)] + bf.s[1][byte(xl >> 16)]) ^ bf.s[2][byte(xl >> 8)]) +
-		bf.s[3][byte(xl)] ^ bf.p[11]
+		(bf.s[3][byte(xl)] ^ bf.p[11])
 	xl ^= ((bf.s[0][byte(xr >> 24)] + bf.s[1][byte(xr >> 16)]) ^ bf.s[2][byte(xr >> 8)]) +
-		bf.s[3][byte(xr)] ^ bf.p[12]
+		(bf.s[3][byte(xr)] ^ bf.p[12])
 	xr ^= ((bf.s[0][byte(xl >> 24)] + bf.s[1][byte(xl >> 16)]) ^ bf.s[2][byte(xl >> 8)]) +
-		bf.s[3][byte(xl)] ^ bf.p[13]
+		(bf.s[3][byte(xl)] ^ bf.p[13])
 	xl ^= ((bf.s[0][byte(xr >> 24)] + bf.s[1][byte(xr >> 16)]) ^ bf.s[2][byte(xr >> 8)]) +
-		bf.s[3][byte(xr)] ^ bf.p[14]
+		(bf.s[3][byte(xr)] ^ bf.p[14])
 	xr ^= ((bf.s[0][byte(xl >> 24)] + bf.s[1][byte(xl >> 16)]) ^ bf.s[2][byte(xl >> 8)]) +
-		bf.s[3][byte(xl)] ^ bf.p[15]
+		(bf.s[3][byte(xl)] ^ bf.p[15])
 	xl ^= ((bf.s[0][byte(xr >> 24)] + bf.s[1][byte(xr >> 16)]) ^ bf.s[2][byte(xr >> 8)]) +
-		bf.s[3][byte(xr)] ^ bf.p[16]
+		(bf.s[3][byte(xr)] ^ bf.p[16])
 	xr ^= bf.p[17]
 	return [xl, xr]
 }
diff --git a/vlib/crypto/blowfish/blowfish.v b/vlib/crypto/blowfish/blowfish.v
index e2d4962f20..ead8196bf9 100644
--- a/vlib/crypto/blowfish/blowfish.v
+++ b/vlib/crypto/blowfish/blowfish.v
@@ -7,7 +7,9 @@ pub mut:
 }
 
 pub fn new_cipher(key []byte) ?Blowfish {
-	mut bf := Blowfish{p, s}
+	mut bf := Blowfish{}
+	unsafe { vmemcpy(&bf.p[0], &p[0], int(sizeof(bf.p))) }
+	unsafe { vmemcpy(&bf.s[0], &s[0], int(sizeof(bf.s))) }
 	if key.len < 1 || key.len > 56 {
 		return error('invalid key')
 	}
@@ -20,7 +22,9 @@ pub fn new_salted_cipher(key []byte, salt []byte) ?Blowfish {
 	if salt.len == 0 {
 		return new_cipher(key)
 	}
-	mut bf := Blowfish{p, s}
+	mut bf := Blowfish{}
+	unsafe { vmemcpy(&bf.p[0], &p[0], int(sizeof(bf.p))) }
+	unsafe { vmemcpy(&bf.s[0], &s[0], int(sizeof(bf.s))) }
 	if key.len < 1 {
 		return error('invalid key')
 	}