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make crypto functions allocate the output

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This commit is contained in:
Antoni Piasecki
2026-01-04 10:22:26 +01:00
parent b78223fae7
commit c603d10012
2 changed files with 15 additions and 17 deletions
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20
examples/crypto.zr
View File

@@ -5,18 +5,16 @@ func main[] : i64
let input: str = "Hello, World!"
let input_len: i64 = str.len(input)
let out: ptr = mem.alloc(input_len)
crypto.xchacha20.xor(key, nonce, input, out, input_len)
io.println(str.hex_encode(out, input_len))
let ciphertext: ptr = crypto.xchacha20.xor(key, nonce, input, input_len)
io.println(str.hex_encode(ciphertext, input_len))
// X25519
let scalar: ptr = str.hex_decode("a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4")
let point: ptr = str.hex_decode("e6db6867583030db3594c1a424b15f7c726624ec26b3353b10a903a6d0ab1c4c")
let expected: ptr = str.hex_decode("c3da55379de9c6908e94ea4df28d084f32eccf03491c71f754b4075577a28552")
let out: ptr = mem.alloc(32)
crypto.x25519.scalarmult(out, scalar, point)
let out: ptr = crypto.x25519.scalarmult(scalar, point)
io.print("Computed: ")
io.println(str.hex_encode(out, 32))
@@ -31,8 +29,7 @@ func main[] : i64
io.print("A_priv: ")
io.println(str.hex_encode(alice_private, 32))
let alice_public: ptr = mem.alloc(32)
crypto.x25519.scalarmult(alice_public, alice_private, base_point)
let alice_public: ptr = crypto.x25519.scalarmult(alice_private, base_point)
io.print("A_pub: ")
io.println(str.hex_encode(alice_public, 32))
@@ -40,17 +37,14 @@ func main[] : i64
io.print("B_priv: ")
io.println(str.hex_encode(bob_private, 32))
let bob_public: ptr = mem.alloc(32)
crypto.x25519.scalarmult(bob_public, bob_private, base_point)
let bob_public: ptr = crypto.x25519.scalarmult(bob_private, base_point)
io.print("B_pub: ")
io.println(str.hex_encode(bob_public, 32))
let alice_shared: ptr = mem.alloc(32)
crypto.x25519.scalarmult(alice_shared, alice_private, bob_public)
let alice_shared: ptr = crypto.x25519.scalarmult(alice_private, bob_public)
io.print("A_shared: ")
io.println(str.hex_encode(alice_shared, 32))
let bob_shared: ptr = mem.alloc(32)
crypto.x25519.scalarmult(bob_shared, bob_private, alice_public)
let bob_shared: ptr = crypto.x25519.scalarmult(bob_private, alice_public)
io.print("B_shared: ")
io.println(str.hex_encode(bob_shared, 32))

12
src/std.zr
View File

@@ -781,14 +781,16 @@ func crypto.xchacha20._stream[key: ptr, nonce: ptr, out: ptr, len: i64] : void
mem.free(nonce12)
mem.free(subkey)
func crypto.xchacha20.xor[key: ptr, nonce: ptr, input: ptr, out: ptr, len: i64] : void
func crypto.xchacha20.xor[key: ptr, nonce: ptr, input: ptr, len: i64] : ptr
if len <= 0
return 0
return dbg.panic("empty buffer passed to crypto.xchacha20.xor")
let out: ptr = mem.alloc(len)
let ks: ptr = mem.alloc(len)
crypto.xchacha20._stream(key, nonce, ks, len)
for i in 0..len
mem.write8(out + i, input[i] ^ ks[i])
mem.free(ks)
return out
func crypto.x25519.carry[elem: ptr] : void
for i in 0..16
@@ -877,7 +879,7 @@ func crypto.x25519.pack[out: ptr, input: ptr] : void
mem.free(t)
mem.free(m)
func crypto.x25519.scalarmult[out: ptr, scalar: ptr, point: ptr] : void
func crypto.x25519.scalarmult[scalar: ptr, point: ptr] : ptr
let clamped: ptr = mem.alloc(32)
let a: ptr = mem.alloc(16 * 8)
let b: ptr = mem.alloc(16 * 8)
@@ -939,6 +941,7 @@ func crypto.x25519.scalarmult[out: ptr, scalar: ptr, point: ptr] : void
crypto.x25519.finverse(c, c)
crypto.x25519.fmul(a, a, c)
let out: ptr = mem.alloc(32)
crypto.x25519.pack(out, a)
mem.free(clamped)
@@ -949,4 +952,5 @@ func crypto.x25519.scalarmult[out: ptr, scalar: ptr, point: ptr] : void
mem.free(e)
mem.free(f)
mem.free(x)
mem.free(magic)
mem.free(magic)
return out