Fix EVP_DigestInit_ex with NULL digest

Calling EVP_DigestInit_ex which has already had the digest set up for it
should be possible. You are supposed to be able to pass NULL for the type.

Fix EVP_DigestInit_ex with NULL digest

Calling EVP_DigestInit_ex which has already had the digest set up for it
should be possible. You are supposed to be able to pass NULL for the type.
However currently this seg faults.

Reviewed-by: Andy Polyakov <appro@openssl.org>

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Run util/openssl-format-source -v -c .

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

Ignore NULL parameter in EVP_MD_CTX_destroy.
(cherry picked from commit a6c62f0c25a756c263a80ce52afbae888028e986)

Fix memory leak: free up ENGINE functional reference if digest is not
found in an ENGINE.

Add patch to crypto/evp which didn't apply from PR#2124

PR: 2124
Submitted by: Jan Pechanec <Jan.Pechanec@Sun.COM>

Check for memory allocation failures.

Formatting.

Copy update callback across when copying EVP_MD_CTX.

Remove unnecessary reference to EVP_MD_CTX in HMAC pkey method.

Experimental HMAC support via EVP_PKEY_METHOD.

Allow digests to supply S/MIME micalg values from a ctrl.

Send ctrls to EVP_PKEY_METHOD during signing of PKCS7 structure so
customisation is possible.

Update EVP_MD_CTX_copy_ex() to use EVP_PKEY_CTX_dup().

Fix more error codes.

(Also improve util/ck_errf.pl script, and occasionally
fix source code formatting.)

size_t-fication of message digest APIs. We should size_t-fy more APIs...

Constify d2i, s2i, c2i and r2i functions and other associated
functions and macros.

This change has associated tags: LEVITTE_before_const and
LEVITTE_after_const. Those will be remo

Constify d2i, s2i, c2i and r2i functions and other associated
functions and macros.

This change has associated tags: LEVITTE_before_const and
LEVITTE_after_const. Those will be removed when this change has been
properly reviewed.

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Add flag to avoid continuous
memory allocate when calling EVP_MD_CTX_copy_ex().

Without this HMAC is several times slower than
< 0.9.7.

Fixes for EVP_DigestInit_ex() and OPENSSL_NO_ENGINE.

Add the possibility to build without the ENGINE framework.
PR: 287

Cleanse memory using the new OPENSSL_cleanse() function.
I've covered all the memset()s I felt safe modifying, but may have missed some.

Security fixes brought forward from 0.9.7.

Make ciphers and digests obtain an ENGINE functional reference
if impl is explicitly supplied.

The 'type' parameter, an EVP_MD pointer, represents the type of digest
required as well as a default implementation (when no ENGINE provides a
replacement implementation). This change makes s

The 'type' parameter, an EVP_MD pointer, represents the type of digest
required as well as a default implementation (when no ENGINE provides a
replacement implementation). This change makes sure the correct
implementation's "init()" handler is used rather than assuming 'type'.

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Constification, add config to /dev/crypto.

Retain compatibility of EVP_DigestInit() and EVP_DigestFinal()
with existing code.

Modify library to use digest *_ex() functions.

Don't clean up stuff twice.

This changes EVP's cipher and digest code to hook via the ENGINE support.
See crypto/engine/README for details.

- it also removes openbsd_hw.c from the build (that functionality is

This changes EVP's cipher and digest code to hook via the ENGINE support.
See crypto/engine/README for details.

- it also removes openbsd_hw.c from the build (that functionality is
going to be available in the openbsd ENGINE in a upcoming commit)

- evp_test has had the extra initialisation added so it will use (if
possible) any ENGINEs supporting the algorithms required.

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