On NetBSD, if it uses patented algorithms without explicit option,
openssl will abort.
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SEGV from AES encryption/decryption. Processing data by
Cipher#update without initializing key (meaningless usage of Cipher
object since we don't offer a way to export a key) could cause SEGV.
In OpenSSL, the EVP which has EVP_CIPH_RAND_KEY flag (such as DES3)
allows uninitialized key, but other EVPs (such as AES) does not
allow it. Calling EVP_CipherUpdate() without initializing key causes
SEGV so we set the data filled with "\0" as the key by default. See
#2768.
* test/openssl/test_cipher.rb: test it.
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not be empty. [ruby-talk:161220]
* test/openssl/test_cipher.rb: add test for Cipher#update("").
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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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