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in-package search v0.1.0
Sign an unsign cookies with secret.
Beware that signing a cookie is not the same as encrypting it! The value of a signed cookie is still visible to anyone, so don't store any sensitive information in it.
When signing a cookie, a hash of its value is generated using the Signer's secret. The generated string is appended to the Cookie's value. So, for instance, if you have a Cookie
key=value, the signed cookie will look like
When reading the cookie value, the hash will be regenerated again and compared with the sent value. If the values are not the same, the cookie has been tempered with, and we discard it.
val make : ?salt:string -> string -> t
make ?salt secret returns a new signer that will sign values with
val sign : t -> string -> string
sign signer value signs the string
val unsign : t -> string -> string option
unsign signer value unsigns a signed string
To avoid time attacks, this function is constant time, it will iterate through all the characters of
value, even if it is not the same.