crypto: fix notices/errors for v -N test vlib/crypto

vlib/crypto/ed25519/ed25519.v

@@ -75,7 +75,7 @@ fn sign_generic(mut signature []u8, privatekey []u8, message []u8) ! {
 	mut h := sha512.sum512(seed)
 	mut s := edwards25519.new_scalar()
 	s.set_bytes_with_clamping(h[..32])!
-	mut prefix := h[32..]
+	mut prefix := unsafe { h[32..] }
 
 	mut mh := sha512.new()
 	mh.write(prefix)!

vlib/crypto/ed25519/internal/ed25519_test.v

@@ -95,7 +95,7 @@ fn works_check_on_sign_input_string(item string) bool {
 	}
 	// assert pubkey.len == public_key_size
 
-	sig = sig[..ed25519.signature_size]
+	sig = unsafe { sig[..ed25519.signature_size] }
 	mut priv := []u8{len: ed25519.private_key_size}
 	copy(mut priv[..], privbytes)
 	copy(mut priv[32..], pubkey)

vlib/crypto/sha512/sha512_test.v

@@ -3,30 +3,31 @@
 // that can be found in the LICENSE file.
 import crypto.sha512
 
+const final_result = '4143e55fcba7e39b20f62a1368e5eb28f64a8859458886117ac66027832e0f9f5263daec688c439d2d0fa07059334668d39e59543039703dbb7e03ec9da7f8d7'
+
 fn test_crypto_sha512() {
-	assert sha512.sum512('This is a sha512 checksum.'.bytes()).hex() == '4143e55fcba7e39b20f62a1368e5eb28f64a8859458886117ac66027832e0f9f5263daec688c439d2d0fa07059334668d39e59543039703dbb7e03ec9da7f8d7'
+	assert sha512.sum512('This is a sha512 checksum.'.bytes()).hex() == final_result
 }
 
 fn test_crypto_sha512_writer() {
 	mut digest := sha512.new_digest(.sha512)
 	digest.write('This is a'.bytes()) or { assert false }
 	digest.write(' sha512 checksum.'.bytes()) or { assert false }
-	mut sum := digest.checksum()
-	assert sum.hex() == '4143e55fcba7e39b20f62a1368e5eb28f64a8859458886117ac66027832e0f9f5263daec688c439d2d0fa07059334668d39e59543039703dbb7e03ec9da7f8d7'
+	// mut sum := digest.checksum()
+	mut sum := digest.sum([])
+	assert sum.hex() == final_result
 	sum = digest.sum([])
-	assert sum.hex() == '64922a82583d4e364010e574ca5ce6a15686e0d268bd41ac1003dda924356d3552e276b7baedacd85a6884e744943a92d931cebca4738510b4568c5fb5a49723'
-	sum = digest.sum([])
-	assert sum.hex() == '64922a82583d4e364010e574ca5ce6a15686e0d268bd41ac1003dda924356d3552e276b7baedacd85a6884e744943a92d931cebca4738510b4568c5fb5a49723'
+	assert sum.hex() == final_result
 }
 
 fn test_crypto_sha512_writer_reset() {
 	mut digest := sha512.new_digest(.sha512)
 	digest.write('This is a'.bytes()) or { assert false }
 	digest.write(' sha512 checksum.'.bytes()) or { assert false }
-	_ = digest.checksum()
+	_ = digest.sum([])
 	digest.reset()
 	digest.write('This is a'.bytes()) or { assert false }
 	digest.write(' sha512 checksum.'.bytes()) or { assert false }
-	sum := digest.checksum()
-	assert sum.hex() == '4143e55fcba7e39b20f62a1368e5eb28f64a8859458886117ac66027832e0f9f5263daec688c439d2d0fa07059334668d39e59543039703dbb7e03ec9da7f8d7'
+	sum := digest.sum([])
+	assert sum.hex() == final_result
 }