libcros 0.6.0

A Rust library that provides easy-to-use functions for interacting with a Chrome device
Documentation 
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use libcros::{
  LOG, LOG_DBG,
  crypto::{adler32, crc32, hmac_sha256, pbkdf2_hmac_sha256, sha1, sha256},
  key_types, keys,
  keyval::KvValue,
  kv_get, kv_set,
  libargs::ArgCheck,
};

fn main() {
  let mut args: ArgCheck = ArgCheck::new();
  let _verbose: bool = args.fbool("--verbose", "", "Enable debug messages");
  let mut value = args.fequals_str(
    "--value",
    "-f",
    "Value to pass through to cryptography functions",
  );

  args.check_help();

  if value.is_empty() {
    value = "Hello, World!".to_string();
  }

  /*
  Hello, World!

  expected:
  CRC32: 0xec4ac3d0
  ADLER32: 0x1f9e046a
  SHA1: 0a0a9f2a6772942557ab5355d76af442f8f65e01
  SHA256: dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f
  HMAC-SHA256 (key="secret"): fcfaffa7fef86515c7beb6b62d779fa4ccf092f2e61c164376054271252821ff
  PBKDF2-HMAC-SHA256 (salt="saltsalt", iterations=10000, output_len=32): 39143d32b2af92c845798e0c5c3a2f60f491af611240433036bf388a5a38032a
  */

  LOG_DBG!("setting value to {}", value);
  kv_set(keys::EXAMPLE, value);

  // always go through kv_get.
  let data = match kv_get(key_types::STRING, keys::EXAMPLE) {
    Some(KvValue::String(s)) => s,
    _ => panic!("invalid or missing EXAMPLE value"),
  };
  let bytes = data.as_bytes();

  LOG!("CRC32: 0x{:08x}", crc32(bytes));
  LOG!("ADLER32: 0x{:08x}", adler32(bytes));

  let s1 = sha1(bytes);
  LOG!(
    "SHA1: {}",
    s1.iter().map(|b| format!("{:02x}", b)).collect::<String>()
  );

  let s256 = sha256(bytes);
  LOG!(
    "SHA256: {}",
    s256
      .iter()
      .map(|b| format!("{:02x}", b))
      .collect::<String>()
  );

  let hmac = hmac_sha256(b"secret", bytes);
  LOG!(
    "HMAC-SHA256 (key=\"secret\"): {}",
    hmac
      .iter()
      .map(|b| format!("{:02x}", b))
      .collect::<String>()
  );

  let pbkdf2 = pbkdf2_hmac_sha256(bytes, b"saltsalt", 10000, 32);
  LOG!(
    "PBKDF2-HMAC-SHA256 (salt=\"saltsalt\", iterations=10000, output_len=32): {}",
    pbkdf2
      .iter()
      .map(|b| format!("{:02x}", b))
      .collect::<String>()
  );
}