Two fixes:

1. If BIO_write() fails inside enc_write() it should return the
   total number of bytes successfully written.

2. If BIO_write() fails during BIO_flush() it should return immediately
   with the error code: previously it would fall through to the final
   encrypt, corrupting the buffer.

the buffer pointer.

Rename PKCS7_PARTSIGN to PKCS7_STREAM.

Guess what that's for :-)

rearrange some of the other text for better readability.

This is needed because Windows doesn't support symlinks.

The Cygwin/MinGW build now passes "make test".

under cygwin.

when reading from a non blocking BIO.

It would incorrectly interpret retries as EOF, incorrectly
buffer initial data and have no buffering at all after initial
data (data would be sent one byte at a time to EVP_DecodeUpdate).

conventions.

behaviour was not quite consistent with the conventions
for d2i and i2d functions as far as handling of the 'out'
or 'in' pointer is concerned.

This patch changes this behaviour, and renames the functions to
o2i_ECPublicKey and i2o_ECPublicKey (not 'd2i' and 'i2d' because the
external encoding is just a raw object string without any DER icing).

Submitted by: Nils Larsch

For some reason it was disabled...

if the write fails when flushing the buffer return the
value to the application so it can retry.

PR: 511
Submitted by: Eric Cronin

An advisory will be posted to the web.  Expect a release within the hour.

Reportedly this option is deprecated, and on some systems
"make test" fails if it is included.

PR: 495

elements directly, so this missing functionality is required.

PR: 276

be cast later on.

Also, I've added handling for other mod_exp calls that were not using any
cached montgomery forms. These cases matter only for special RSA keys (eg.
ones that are missing information) so are unlikely to be used in normal
circumstances.

verification step of CRT private key operations in the RSA code -
previously no montgomery form was checked or used for 'n', and so it would
be generated on the fly each time. As a result, private key operations are
now a percent or two faster.

Rather than adding this as another repetition of the nearly-identical
montgomery "check for first-use" initialisation code blocks, I've taken
this chance to create a helper function and macro-wrapper to replace them.

PR: 475