openssl: add configuration example for afalg-sync

This adds commented configuration help for the alternate, afalg-sync
engine to /etc/ssl/openssl.cnf.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>

package/libs/openssl/Makefile

@@ -11,7 +11,7 @@ PKG_NAME:=openssl
 PKG_BASE:=1.1.1
 PKG_BUGFIX:=d
 PKG_VERSION:=$(PKG_BASE)$(PKG_BUGFIX)
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 PKG_USE_MIPS16:=0
 ENGINES_DIR=engines-1.1
 

package/libs/openssl/patches/150-openssl.cnf-add-engines-conf.patch

@@ -1,6 +1,6 @@
 --- a/apps/openssl.cnf
 +++ b/apps/openssl.cnf
-@@ -22,6 +22,53 @@ oid_section		= new_oids
+@@ -22,6 +22,82 @@ oid_section		= new_oids
  # (Alternatively, use a configuration file that has only
  # X.509v3 extensions in its main [= default] section.)
  
@@ -16,8 +16,37 @@
 +#padlock=padlock
 +
 +[afalg]
++# Leave this alone and configure algorithms with CIPERS/DIGESTS below
 +default_algorithms = ALL
 +
++# The following commands are only available if using the alternative
++# (sync) AFALG engine
++# Configuration commands:
++# Run 'openssl engine -t -c -vv -pre DUMP_INFO devcrypto' to see a
++# list of supported algorithms, along with their driver, whether they
++# are hw accelerated or not, and the engine's configuration commands.
++
++# USE_SOFTDRIVERS: specifies whether to use software (not accelerated)
++# drivers (0=use only accelerated drivers, 1=allow all drivers, 2=use
++# if acceleration can't be determined) [default=2]
++#USE_SOFTDRIVERS = 2
++
++# CIPHERS: either ALL, NONE, NO_ECB (all except ECB-mode) or a
++# comma-separated list of ciphers to enable [default=NO_ECB]
++# Starting in 1.2.0, if you use a cipher list, each cipher may be
++# followed by a colon (:) and the minimum request length to use
++# AF_ALG drivers for that cipher; smaller requests are processed by
++# softare; a negative value will use the default for that cipher
++#CIPHERS=AES-128-CBC:1024, AES-256-CBC:768, DES-EDE3-CBC:0
++
++# DIGESTS: either ALL, NONE, or a comma-separated list of digests to
++# enable [default=NONE]
++# It is strongly recommended not to enable digests; their performance
++# is poor, and there are many cases in which they will not work,
++# especially when calling fork with open crypto contexts.  Openssh,
++# for example, does this, and you may not be able to login.
++#DIGESTS = NONE
++
 +[devcrypto]
 +# Leave this alone and configure algorithms with CIPERS/DIGESTS below
 +default_algorithms = ALL