▼File:   Racket File and Format Libraries
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10 SHA1 Message Digest

 (require file/sha1) package: base

See openssl/sha1 for a faster implementation.

procedure

(sha1 in) → string?

  in : input-port?
Returns a 40-character string that represents the SHA-1 hash (in hexadecimal notation) of the content from in, consuming all of the input from in until an end-of-file.

The sha1 function composes bytes->hex-string with sha1-bytes.

Example:

> (sha1 (open-input-bytes #"abc"))

"a9993e364706816aba3e25717850c26c9cd0d89d"

procedure

(sha1-bytes in) → bytes?

  in : input-port?
Returns a 20-byte byte string that represents the SHA-1 hash of the content from in, consuming all of the input from in until an end-of-file.

Example:

> (sha1-bytes (open-input-bytes #"abc"))

#"\251\231>6G\6\201j\272>%qxP\302l\234\320\330\235"

procedure

(bytes->hex-string bstr) → string?

  bstr : bytes?
Converts the given byte string to a string representation, where each byte in bstr is converted to its two-digit hexadecimal representation in the resulting string.

Example:

> (bytes->hex-string #"turtles")

"747572746c6573"

procedure

(hex-string->bytes str) → bytes?

  str : string?
Converts the given string to a byte string, where each pair of characters in str is converted to a single byte in the result.

Examples:

> (hex-string->bytes "70")

#"p"

> (hex-string->bytes "Af")

#"\257"

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