In apps/apps.c, one can set up an engine with setup_engine().
However, we freed the structural reference immediately, which means
that for engines that don't already have a structural reference
somewhere else (because it's a built in engine), we end up returning
an invalid reference.

Instead, the function release_engine() is added, and called at the end
of the routines that call setup_engine().
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1643)

Reviewed-by: NKurt Roeckx <kurt@openssl.org>
Reviewed-by: NRichard Levitte <levitte@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1694)

Reviewed-by: NStephen Henson <steve@openssl.org>
Reviewed-by: NEmilia Käsper <emilia@openssl.org>

Reviewed-by: NRichard Levitte <levitte@openssl.org>
Reviewed-by: NKurt Roeckx <kurt@openssl.org>

Move rsa_st away from public headers.
Add accessor/writer functions for the public RSA data.
Adapt all other source to use the accessors and writers.
Reviewed-by: NMatt Caswell <matt@openssl.org>

This also closes RT 4123
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Reviewed-by: NDr. Stephen Henson <steve@openssl.org>

continue on from previous commits but in the apps directory
Reviewed-by: NKurt Roeckx <kurt@openssl.org>

Loading the config file after processing command line options can
cause problems, e.g. where an engine provides new ciphers/digests
these are not then recoginised on the command line. Move the
default config file loading to before the command line option
processing. Whilst we're doing this we might as well centralise
this instead of doing it individually for each application. Finally
if we do it before the OpenSSL_add_ssl_algorithms() call then
ciphersuites provided by an engine (e.g. GOST) can be available to
the apps.

RT#4085
RT#4086
Reviewed-by: NRichard Levitte <levitte@openssl.org>

The different apps had the liberty to decide whether they would open their
input and output files in binary mode or not, which could be confusing if
two different apps were handling the same type of file in different ways.

The solution is to centralise the decision of low level file organisation,
and that the apps would use a selection of formats to state the intent of
the file.
Reviewed-by: NTim Hudson <tjh@openssl.org>

Reviewed-by: NMatt Caswell <matt@openssl.org>

When generating a private key, try to make the output file be readable
only by the owner.  Put it in CHANGES file since it might be noticeable.

Add "int private" flag to apps that write private keys, and check that it's
set whenever we do write a private key.  Checked via assert so that this
bug (security-related) gets fixed.  Thanks to Viktor for help in tracing
the code-paths where private keys are written.
Reviewed-by: NViktor Dukhovni <viktor@openssl.org>

The module loading feature got broken a while ago, so restore it, but
have it a bit more explicit this time around.
Reviewed-by: NStephen Henson <steve@openssl.org>

After the finale, the "real" final part. :)  Do a recursive grep with
"-B1 -w [a-zA-Z0-9_]*_free" to see if any of the preceeding lines are
an "if NULL" check that can be removed.
Reviewed-by: NTim Hudson <tjh@openssl.org>

Don't check for NULL before calling OPENSSL_free
Reviewed-by: NRichard Levitte <levitte@openssl.org>

This gets BN_.*free:
    BN_BLINDING_free BN_CTX_free BN_FLG_FREE BN_GENCB_free
    BN_MONT_CTX_free BN_RECP_CTX_free BN_clear_free BN_free BUF_MEM_free

Also fix a call to DSA_SIG_free to ccgost engine and remove some #ifdef'd
dead code in engines/e_ubsec.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Make setup_engine be a dummy if NO_ENGINE is enabled.
The option is not enabled if NO_ENGINE is enabled, so the one "wasted"
variable just sits there. Removes some variables and code.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

This is merges the old "rsalz-monolith" branch over to master.  The biggest
change is that option parsing switch from cascasding 'else if strcmp("-foo")'
to a utility routine and somethin akin to getopt.  Also, an error in the
command line no longer prints the full summary; use -help (or --help :)
for that.  There have been many other changes and code-cleanup, see
bullet list below.

Special thanks to Matt for the long and detailed code review.

TEMPORARY:
        For now, comment out CRYPTO_mem_leaks() at end of main

Tickets closed:
        RT3515: Use 3DES in pkcs12 if built with no-rc2
        RT1766: s_client -reconnect and -starttls broke
        RT2932: Catch write errors
        RT2604: port should be 'unsigned short'
        RT2983: total_bytes undeclared #ifdef RENEG
        RT1523: Add -nocert to fix output in x509 app
        RT3508: Remove unused variable introduced by b09eb246
        RT3511: doc fix; req default serial is random
        RT1325,2973: Add more extensions to c_rehash
        RT2119,3407: Updated to dgst.pod
        RT2379: Additional typo fix
        RT2693: Extra include of string.h
        RT2880: HFS is case-insensitive filenames
        RT3246: req command prints version number wrong

Other changes; incompatibilities marked with *:
        Add SCSV support
        Add -misalign to speed command
        Make dhparam, dsaparam, ecparam, x509 output C in proper style
        Make some internal ocsp.c functions void
        Only display cert usages with -help in verify
        Use global bio_err, remove "BIO*err" parameter from functions
        For filenames, - always means stdin (or stdout as appropriate)
        Add aliases for -des/aes "wrap" ciphers.
        *Remove support for IISSGC (server gated crypto)
        *The undocumented OCSP -header flag is now "-header name=value"
        *Documented the OCSP -header flag
Reviewed-by: NMatt Caswell <matt@openssl.org>

This commit handles BIO_ACCEPT_free BIO_CB_FREE BIO_CONNECT_free
BIO_free BIO_free_all BIO_vfree
Reviewed-by: NMatt Caswell <matt@openssl.org>

Start ensuring all OpenSSL "free" routines allow NULL, and remove
any if check before calling them.
This gets DH_free, DSA_free, RSA_free
Reviewed-by: NMatt Caswell <matt@openssl.org>

Reviewed-by: NTim Hudson <tjh@openssl.org>

This last one for this ticket.  Removes WIN16.
So long, MS_CALLBACK and MS_FAR.  We won't miss you.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Reviewed-by: NRich Salz <rsalz@openssl.org>

I also replaced some exit/return wrappers in various
programs (from main) to standardize on return.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Reviewed-by: NTim Hudson <tjh@openssl.org>

This is a more comprehensive fix.  It changes all
keygen apps to use 2K keys. It also changes the
default to use SHA256 not SHA1.  This is from
Kurt's upstream Debian changes.
Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NKurt Roeckx <kurt@openssl.org>

PR: 1503
Submitted by: KISA
Reviewed by: Bodo Moeller

Submitted by: Masashi Fujita
Reviewed by: Bodo Moeller

    	./configure no-deprecated [no-dsa] [no-dh] [no-ec] [no-rsa]
    	make depend all test
work again

PR: 1159

proposed the change and submitted the patch, I jiggled it slightly and
adjusted the other parts of openssl that were affected.

PR: 867
Submitted by: Jelte Jansen
Reviewed by: Geoff Thorpe

and links with OPENSSL_NO_DEPRECATED defined.

PR: 287

being built with it defined - it is not a symbol to affect how openssl
itself builds, but to alter the way openssl headers can be used from an API
point of view. The "deprecated" function wrappers will always remain inside
OpenSSL at least as long as they're still being used internally. :-)

The exception is dsaparam which has been updated to the BN_GENCB-based
functions to test the new functionality. If GENCB_TEST is defined, dsaparam
will support a "-timebomb <n>" switch to cancel parameter-generation if it
gets as far as 'n' seconds without completion.

exit() in whatever way works for the intended platform, and define
OPENSSL_EXIT() to have the old meaning (the name is of course because
it's only used in the openssl program)

CONF_modules_unload() now calls CONF_modules_finish()
automatically.

Default use of section openssl_conf moved to
CONF_modules_load()

Load config file in several openssl utilities.

Most utilities now load modules from the config file,
though in a few (such as version) this isn't done
because it couldn't be used for anything.

In the case of ca and req the config file used is
the same as the utility itself: that is the -config
command line option can be used to specify an
alternative file.