raw2hex: Convert raw vector to string hex representation

In NCEAS/PKIplus: Public Key Infrastructure for R Based on the X.509 Standard, Plus Access Functions

Description

raw2hex convers a raw vector into hexadecimal representation

Usage

raw2hex(what, sep, upper = FALSE)

Arguments

what	raw vector
sep	optional separator string
upper	logical, if TRUE then upper case letters are used, otherwise any letters will be lower case.

Details

If sep is omitted or NULL then the resulting character vector will have as many elements as the raw vector. Otherwise the elements are concatenated using the specified separator into one character string. This is much more efficient than using paste(raw2hex(x), collapse=sep), but has the same effect.

Value

Character vector with the hexadecimal representation of the raw vector.

Author(s)

Simon Urbanek

Examples

raw2hex(PKI.digest(raw(), "SHA1"), "")
raw2hex(PKI.digest(raw(), "MD5"), ":")

## this is jsut a performance comparison and a test that
## raw2hex can handle long strings
x <- as.raw(runif(1e5) * 255.9)
system.time(h1 <- raw2hex(x, " "))
system.time(h2 <- paste(raw2hex(x), collapse=" "))
stopifnot(identical(h1, h2))

NCEAS/PKIplus documentation built on May 7, 2019, 5:58 p.m.