SHA and SHA-2

6.3.90.900

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SHA and SHA-2

package: sha

Provides a Racket interface to the OpenSSL implementation of SHA-1 and SHA-2.

SHA-2 includes four flavors: SHA-224, SHA-256, SHA-384, and SHA-512.

1 SHA

procedure
(sha1 bstr) → sha1?
  bstr : bytes?
procedure
(sha224 bstr) → sha224?
  bstr : bytes?
procedure
(sha256 bstr) → sha256?
  bstr : bytes?
procedure
(sha384 bstr) → sha384?
  bstr : bytes?
procedure
(sha512 bstr) → sha512?
  bstr : bytes?

Calculate the SHA hash of bstr.

2 HMAC-SHA

procedure
(hmac-sha1 key data) → sha1?
  key : bytes?
  data : bytes?
procedure
(hmac-sha224 key data) → sha224?
  key : bytes?
  data : bytes?
procedure
(hmac-sha256 key data) → sha256?
  key : bytes?
  data : bytes?
procedure
(hmac-sha384 key data) → sha384?
  key : bytes?
  data : bytes?
procedure
(hmac-sha512 key data) → sha512?
  key : bytes?
  data : bytes?

HMAC-SHA encode key and data.

3 Hex string

procedure
(bytes->hex-string bstr) → string?
bstr : bytes?

Convert bstr to a hexadecimal string represention.

4 Predicates for contracts

procedure
(sha1? x) → boolean?
x : any/c

Is x a bytes? of length 20?

procedure
(sha224? x) → boolean?
x : any/c

Is x a bytes? of length 28?

procedure
(sha256? x) → boolean?
x : any/c

Is x a bytes? of length 32?

procedure
(sha384? x) → boolean?
x : any/c

Is x a bytes? of length 48?

procedure
(sha512? x) → boolean?
x : any/c

Is x a bytes? of length 64?

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