R: Parsing keys and certificates

read_key {openssl} | R Documentation

## Parsing keys and certificates

### Description

The `read_key` function (private keys) and `read_pubkey` (public keys) support both SSH pubkey format and OpenSSL PEM format (base64 data with a `--BEGIN` and `---END` header), and automatically convert where necessary. The functions assume a single key per file except for `read_cert_bundle` which supports PEM files with multiple certificates.

### Usage

    read_key(file, password = askpass, der = is.raw(file))

    read_pubkey(file, der = is.raw(file))

    read_cert(file, der = is.raw(file))

    read_cert_bundle(file)

    read_pem(file)

### Arguments

`file` | Either a path to a file, a connection, or literal data (a string for pem/ssh format, or a raw vector in der format)
`password` | A string or callback function to read protected keys
`der` | set to `TRUE` if `file` is in binary DER format

### Details

Most versions of OpenSSL support at least RSA, DSA and ECDSA keys. Certificates must conform to the X509 standard.

The `password` argument is needed when reading keys that are protected with a passphrase. It can either be a string containing the passphrase, or a custom callback function that will be called by OpenSSL to read the passphrase. The function should take one argument (a string with a message) and return a string. The default is to use `readline` which will prompt the user in an interactive R session.

### Value

An object of class `cert`, `key` or `pubkey` which holds the data in binary DER format and can be decomposed using `as.list`.

### See Also

download_ssl_cert

### Examples

    ## Not run: # Read private key
    key <- read_key("~/.ssh/id_rsa")
    str(key)

    # Read public key
    pubkey <- read_pubkey("~/.ssh/id_rsa.pub")
    str(pubkey)

    # Read certificates
    txt <- readLines("https://curl.haxx.se/ca/cacert.pem")
    bundle <- read_cert_bundle(txt)
    print(bundle)

    ## End(Not run)

[Package openssl version 2.0.2 Index]