Re: [ptxdist] [PATCH 04/13] ptxd_lib_code_signing: introduce CA helper

[Michael Olbrich <m.olbrich@pengutronix.de>]

On Thu, May 14, 2020 at 03:42:51PM +0200, Bastian Krause wrote:
> These helpers allow key providers to append certificates to their CA.
> 'cs_get_ca <role>' then returns the path to the keyring allowing rules
> and other helpers to retrieve it easily.
> 
> Signed-off-by: Bastian Krause <bst@pengutronix.de>
> ---
>  scripts/lib/ptxd_lib_code_signing.sh | 63 ++++++++++++++++++++++++++++
>  1 file changed, 63 insertions(+)
> 
> diff --git a/scripts/lib/ptxd_lib_code_signing.sh b/scripts/lib/ptxd_lib_code_signing.sh
> index f93f183df..571fe6806 100644
> --- a/scripts/lib/ptxd_lib_code_signing.sh
> +++ b/scripts/lib/ptxd_lib_code_signing.sh
> @@ -261,3 +261,66 @@ cs_import_key_from_pem() {
>      cs_import_privkey_from_pem "${role}" "${pem}"
>  }
>  export -f cs_import_key_from_pem
> +
> +#
> +# cs_get_ca <role>
> +#
> +# Get the path to the CA in pem format from a role
> +#
> +cs_get_ca() {
> +    local role="${1}"
> +    cs_init_variables
> +
> +    echo "${keydir}/${role}/ca.pem"
> +}
> +export -f cs_get_ca
> +
> +#
> +# cs_append_ca_from_pem <role> <pem>
> +#
> +# Append PEM to CA for a role
> +#
> +cs_append_ca_from_pem() {
> +    local role="${1}"
> +    local pem="${2}"
> +    cs_init_variables
> +
> +    cat "${pem}" >> "${keydir}/${role}/ca.pem"

Jan, is this correct? I think you said something about extra newlines that
may be needed?

Michael

> +}
> +export -f cs_append_ca_from_pem
> +
> +#
> +# cs_append_ca_from_der <role> <der>
> +#
> +# Append DER to CA for a role
> +#
> +cs_append_ca_from_der() {
> +    local role="${1}"
> +    local der="${2}"
> +    cs_init_variables
> +
> +    ptxd_exec openssl x509 -inform der -in "${der}" \
> +	-out "${tmpdir}/ca.pem" &&
> +    cs_append_ca_from_pem "${role}" "${tmpdir}/ca.pem"
> +}
> +export -f cs_append_ca_from_der
> +
> +#
> +# cs_append_ca_from_uri <role> [<uri>]
> +#
> +# Append certificate specified by URI or by already set URI to CA for a role
> +#
> +cs_append_ca_from_uri() {
> +    local role="${1}"
> +    local uri="${2}"
> +    local tmpdir="$(mktemp -d "${PTXDIST_TEMPDIR}/${role}-ca.XXXXXX")"
> +    cs_init_variables
> +
> +    if [ -z "${uri}" ]; then
> +	uri=$(cs_get_uri "${role}")
> +    fi
> +
> +    ptxd_exec extract-cert "${uri}" "${tmpdir}/ca.der" &&
> +    cs_append_ca_from_der "${role}" "${tmpdir}/ca.der"
> +}
> +export -f cs_append_ca_from_uri
> -- 
> 2.26.2
> 
> 
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> ptxdist mailing list
> ptxdist@pengutronix.de
> 

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