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| page_title: filesha1 - Functions - Configuration Language | |
| description: |- | |
| The filesha1 function computes the SHA1 hash of the contents of | |
| a given file and encodes it as hex. | |
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| # `filesha1` Function | |
| `filesha1` is a variant of [`sha1`](/language/functions/sha1) | |
| that hashes the contents of a given file rather than a literal string. | |
| This is similar to `sha1(file(filename))`, but | |
| because [`file`](/language/functions/file) accepts only UTF-8 text it cannot be used to | |
| create hashes for binary files. |