Changes in version 0.1-15 (2025-08-19)                 

    o   use pkg-config on Windows if available

    o   update configure and remove a bashism

                 Changes in version 0.1-14 (2024-06-15)                 

    o   improves fall-back to native crypto routines on macOS (#31)

    o   remove calls to SETLENGTH() and copy defensively.

                       Changes in version 0.1-13                        

    o   fixed PKI.sign.tar() and PKI.verify.tar() mist-detecting
	tar-balls with xz (lzma) compression. Also the detection
	no longer fails in UTF-8 locales on systems where R
	attempts to interpret the magic bytes as UTF-8. (#29)

    o   added PKI.genpass() for random password generation

                 Changes in version 0.1-12 (2022-11-28)                 

    o   minor cleanup of casts to avoid spurious warnings

    o   add support for large vector digests

                 Changes in version 0.1-11 (2022-03-16)                 

    o   add PKI.info() which returns information about the
	underlying engine.

    o   add support for OpenSSL >= 3.0.0 (#26)
	Thanks to Steve Langasek for analysis and patch.

    o   PKI.sign.tar() avoids the use of strings for compression
	detection as it can fail in some locales. (#27)

    o   added support for PKGCONFIG which defaults to pkg-config
	and will be used to auto-detect compiler flags if they
	are not provided in PKG_* or OPENSSL_INCLUDES. This
	behavior can be disabled by explicitly setting
	PKGCONFIG to an empty string.

                 Changes in version 0.1-10 (2022-03-09)                 

    o   minor change of flags for UCRT Windows

                 Changes in version 0.1-9 (2021-11-03)                  

    o   add default= and partial= arguments to PKI.verifyCA()

    o   add PKI.get.cert.info() and informative print() method
	for certificates.

    o   fix PKI.verify.tar to support certificates stored
	directly instead of wrapped inside ASN1 bit string.

                 Changes in version 0.1-8 (2021-02-04)                  

    o   improve configure to use R's CPPFLAGS

                 Changes in version 0.1-7 (2020-04-14)                  

    o   fix a bug in PKI.save.key when writing binary DER key
	to a file or connection

    o   add defensive PROTECTs in PKI_load_DER_X509

                        Changes in version 0.1-6                        

    o   add work-around for macOS SDKs that remove libcrypto

                Changes in version 0.1-5.1 (2017-09-16)                 

    o   added explicit C code for symbol registration

                        Changes in version 0.1-5                        

    o   use configure/autoconf

    o   macOS: fetch OpenSSL headers from Apple if not available
	in the SDK

                        Changes in version 0.1-4                        

    o   add support for explicit setting of initialization vectors
	(iv) in PKI.encrypt() and PKI.decrypt() for ciphers that
	support it. (see #16)

    o   add PKI.random() for generating cryptographically strong
	random bytes which can be used for keys, IVs, seeds etc.

    o   adapt to API changes in OpenSSL 1.1 (see also PR#18)

                 Changes in version 0.1-3 (2015-07-28)                  

    o   fixed crash when loading private keys introduced by PR#1
	in (unreleased) 0.1-2 and bring back the ability to directly
	read "DER"-encoded private RSA keys.

    o   fix detection of PKCS#8 encrypted private keys in PEM format

                        Changes in version 0.1-2                        

    o   add "DER" format option to PKI.load.cert()

    o   allow key in PKI.verify to be a certificate
	(which will be passed to PKI.pubkey() internally)

    o   add experimental signing/verification of tar files using
	PKI.sign.tar() and PKI.verify.tar()

    o   add support for symmetric ciphers like AES in
	PKI.encrypt()/PKI.decrypt()

    o   add support for retrieving the subject of a certificate
	via PKI.get.subject() [PR#2, thanks to Matt Jones]

    o   add support for PKCS#8 private key format (RFC 5208)
	and sign/verify/digest using SHA256.
	[PR#1, thanks to Siddhartha Bagaria]

    o   bugfix: key length was incorrectly checked when using
	symmetric ciphers so too short keys were accepted.

    o   bugfix: if the last block was filled during encryption, the
	necessary additional padding block was not generated. (#8)

    o   bugfix: some functions did not call PKI initialization.
	One manifestation was that error messages were cryptic until
	any X.509 function was called. (#9)

                 Changes in version 0.1-1 (2013-02-20)                  

    o   added PKI.load.key() and PKI.save.key()
	functions to load/save keys from/to PEM and DER formats
	IMPORTANT API NOTE: PKI.load.key() replaces the
	(unexported) function PKI.load.privkey()
	in the previous PKI version.

    o   added support for OpenSSH public key format
	(as used in .ssh/authorized_keys files)
	as well as pure PKCS#1 and SSH2 PEMs

    o   make PEM parsing more robust to support
	headers

    o   added ASN.1 tools to parse and synthesize ASN.1
	formatted objects - mostly for use in key format
	conversions

    o   added as.BIGNUMint() for ASN.1 BIGNUM integer
	format conversion

    o   added PKI.mkRSApubkey() to create RSA public keys
	from modulus and exponent alone

    o   added raw2hex() function to convert raw hashes
	into string format

                 Changes in version 0.1-0 (2012-11-05)                  

    o   first public release