Static ring::digest::SHA1

pub static SHA1: Algorithm = Algorithm{output_len: sha1::OUTPUT_LEN,
          chaining_len: sha1::CHAINING_LEN,
          block_len: sha1::BLOCK_LEN,
          len_len: 64 / 8,
          block_data_order: sha1::block_data_order,
          format_output: sha256_format_output,
          initial_state:
              [4023233417u32 as u64 << 32 | 1732584193u32 as u64,
               271733878u32 as u64 << 32 | 2562383102u32 as u64,
               0u32 as u64 << 32 | 3285377520u32 as u64, 0, 0, 0, 0, 0],}

SHA-1 as specified in FIPS 180-4. Deprecated.