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1.1 KiB

1.1 KiB

# CRC

CRC is a simple command-line utility to compute various CRC values for one or more files.

It supports three CRC algorithms (selected via `--mode=<alg>`

):

`crc64-ecma`

uses the ECMA polynomial to compute a 64-bit CRC.`crc64-iso`

uses the ISO polynomial to compute a 64-bit CRC.`crc32`

(*default*) uses the IEEE polynomial to compute a 32-bit CRC. This is equivalent to the`crc32`

linux binary.

If only a single file is specified on the command line, then only the hexadecimal hash is printed. If more than one file is specified, the output will be

```
<hash><tab><filename>
```

for each file.

## Installation

```
go get github.com/augustoroman/crc
```

## Usage

```
# Compute the default hash (crc32 w/ IEEE polynomial) of one or more files.
crc <file> [<file> ...]
# Compute the crc64 hash with ISO polynomial.
crc --mode=crc64-iso <file> [<file> ...]
# Compute the crc64 hash (with the ECMA polynomial).
crc --mode=crc64-ecma <file> [<file> ...]
```

## License

This is released under the MIT license