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sys: crypt: style + drop unnecessary length check

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These are statically sized arrays, not slices, they cannot be empty.

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2024-08-28 13:04:43 +02:00
parent 3129752da9
commit 2da3121492
1 changed files with 5 additions and 5 deletions
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10
proxmox-sys/src/crypt.rs
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@ -26,7 +26,7 @@ pub const HASH_PREFIX: &str = "$y$";
const HASH_COST: u64 = 5;
#[repr(C)]
struct crypt_data {
struct CryptData {
output: [libc::c_char; CRYPT_OUTPUT_SIZE],
setting: [libc::c_char; CRYPT_OUTPUT_SIZE],
input: [libc::c_char; CRYPT_MAX_PASSPHRASE_SIZE],
@ -43,11 +43,11 @@ pub fn crypt(password: &[u8], salt: &[u8]) -> Result<String, Error> {
fn __crypt_r(
key: *const libc::c_char,
salt: *const libc::c_char,
data: *mut crypt_data,
data: *mut CryptData,
) -> *mut libc::c_char;
}
let mut data: crypt_data = unsafe { std::mem::zeroed() };
let mut data: CryptData = unsafe { std::mem::zeroed() };
for (i, c) in salt.iter().take(data.setting.len() - 1).enumerate() {
data.setting[i] = *c as libc::c_char;
}
@ -71,7 +71,7 @@ pub fn crypt(password: &[u8], salt: &[u8]) -> Result<String, Error> {
// > output field of their data argument, and crypt writes an invalid hash to its static
// > storage area. This string will be shorter than 13 characters, will begin with a ‘*’,
// > and will not compare equal to setting.
if data.output.first().is_none() || Some(&('*' as i8)) == data.output.first() {
if data.output[0] == '*' as libc::c_char {
bail!("internal error: crypt_r returned invalid hash");
}
CStr::from_ptr(&data.output as *const _)
@ -133,7 +133,7 @@ pub fn crypt_gensalt(prefix: &str, count: u64, rbytes: &[u8]) -> Result<String,
// while it states that this is "in addition" to returning a null pointer, this isn't how
// `crypt_r` seems to behave (sometimes only setting an invalid hash) so add this here too just
// in case.
if output.first().is_none() || Some(&('*' as i8)) == output.first() {
if output[0] == '*' as libc::c_char {
bail!("internal error: crypt_gensalt_rn could not create a valid salt");
}