kumquat-buildroot/package/libcurl/Config.in
Trent Piepho b8b78e7e6a libcurl: Allow selection of TLS package libcurl will use
Instead of defaulting to OpenSSL, allow selection of package to use
through a choice in libcurl's config.  The default will be to select the
first enabled TLS provider in the same preference order as is used now,
i.e. no change from current behavior.

Some of the alternative libraries have advantages over OpenSSL in
certain areas.

For example, gnutls has vastly superior PKCS11 support.  One can use
client TLS private keys by supplying a PKCS11 URI instead of a private
key file name.  The TLS server cert trust store can be a PKCS11 URI,
e.g. configure libcurl with a ca-bundle of "pkcs11:model=p11-kit-trust".
Now server certs can be stored in a software and/or hardware HSM(s).
This doesn't work with OpenSSL.

However, some software only supports OpenSSL for TLS or other crypto
functions.  So it might be necessary to enable OpenSSL for that reason.

Signed-off-by: Trent Piepho <tpiepho@impinj.com>
[Peter: add BR2_PACKAGE_LIBCURL_TLS_SUPPORT and use it to hide choice &
	comment, explitly pass --without-foo if option is not enabled,
	only do .pc fixup if BR2_PACKAGE_LIBCURL_OPENSSL is enabled]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2018-11-12 22:24:18 +01:00

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config BR2_PACKAGE_LIBCURL
bool "libcurl"
help
cURL is a tool for getting files from FTP, HTTP, Gopher,
Telnet, and Dict servers, using any of the supported
protocols.
http://curl.haxx.se/
if BR2_PACKAGE_LIBCURL
config BR2_PACKAGE_CURL
bool "curl binary"
help
Install curl binary as well
config BR2_PACKAGE_LIBCURL_VERBOSE
bool "enable verbose strings"
help
Enable verbose text strings
config BR2_PACKAGE_LIBCURL_TLS_SUPPORT
bool
default y if BR2_PACKAGE_OPENSSL
default y if BR2_PACKAGE_GNUTLS
default y if BR2_PACKAGE_LIBNSS
default y if BR2_PACKAGE_MBEDTLS
choice
prompt "SSL/TLS library to use"
depends on BR2_PACKAGE_LIBCURL_TLS_SUPPORT
config BR2_PACKAGE_LIBCURL_OPENSSL
bool "OpenSSL"
depends on BR2_PACKAGE_OPENSSL
config BR2_PACKAGE_LIBCURL_GNUTLS
bool "GnuTLS"
depends on BR2_PACKAGE_GNUTLS
config BR2_PACKAGE_LIBCURL_LIBNSS
bool "NSS"
depends on BR2_PACKAGE_LIBNSS
config BR2_PACKAGE_LIBCURL_MBEDTLS
bool "mbed TLS"
depends on BR2_PACKAGE_MBEDTLS
endchoice
comment "A TLS library is needed for SSL/TLS support"
depends on !BR2_PACKAGE_LIBCURL_TLS_SUPPORT
endif