* ext/openssl/ossl_missing.h/.c: add ASN1_put_eoc if missing.

* ext/openssl/ossl_asn1.c: introduce ossl_asn1_object_size and
  ossl_asn1_put_object to wrap functionality depending on OpenSSL
  version in use.
  Fixes	[ Ruby 1.9 - Bug #4916 ] reported by Hiroshi Nakamura.
  [ruby-core:37286]


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          ref #3400
          The patch contains following comment:
            This patch should avoid unnecessary incompatibility with future
            versions of Openssl.  Changes suggested by bmaher_at_amazon.com.


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  [ruby-core:22860]

* ext/openssl/ossl_engine.c (ossl_engine_s_by_id): suppress a
  warning.

* ext/openssl/ossl_ssl.c (ossl_sslctx_flush_sessions): time_t may
  be larger than long.

* ext/openssl/ossl_ssl_session.c (ossl_ssl_session_get_time),
  (ossl_ssl_session_get_timeout): use TIMET2NUM() to convert
  time_t.


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  versions.  [ruby-dev:35637]


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  prototype change in openssl bundled with newer OpenBSD.
  a patch from Takahiro Kambe <taca at back-street.net> in
  [ruby-dev:34691].

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* ext/openssl/openssl_missing.h: ditto.


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  EVP_CIPHER_CTX_set_padding, EVP_CipherFinal_ex, EVP_CipherInit_ex,
  EVP_DigestFinal_ex and EVP_DigestInit_ex.

* ext/openssl/openssl_missing.c (EVP_CIPHER_CTX_copy): new function.

* ext/openssl/openssl_missing.h (EVP_DigestInit_ex, EVP_DigestFinal_ex,
  EVP_CipherInit_ex, EVP_CipherFinal_ex, HMAC_Init_ex): new macro for
  OpenSSL 0.9.6.

* ext/openssl/ossl_cipher.c (ossl_cipher_alloc, ossl_cipher_initialize,
  ossl_cipher_copy, ossl_cipher_reset, ossl_cipher_encrypt,
  ossl_cipher_decrypt, ossl_cipher_final, ossl_cipher_set_key,
  ossl_cipher_set_iv): replace all EVP_CipherInit and
  EVP_CipherFinal into EVP_CipherInit_ex and EVP_CipherFinal_ex.
  and EVP_CIPHER_CTX_init should only be called once.

* ext/openssl/ossl_cipher.c (ossl_cipher_set_padding): check for
  EVP_CIPHER_CTX_set_padding.

* ext/openssl/ossl_cipher.c (Init_ossl_cipher): Cipher#<< is deprecated.

* ext/openssl/ossl_digest.c: replace all EVP_DigestInit and
  EVP_DigestFinal into EVP_DigestInit_ex and EVP_DigestFinal_ex.
  and EVP_MD_CTX_init should only be called once.

* ext/openssl/ossl_digest.c (digest_final): should call
  EVP_MD_CTX_cleanup to avoid memory leak.

* ext/openssl/ossl_hmac.c (ossl_hmac_initialize): repalce HMAC_init
  into HMAC_init_ex. and HMAC_CTX_init is moved to ossl_hmac_alloc.

* ext/openssl/ossl_hmac.c (hmac_final): should call
  HMAC_CTX_cleanup to avoid memory leak.

* test/openssl/test_cipher.rb, test/openssl/test_digest.rb,
  test/openssl/test_hmac.rb: new file.


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