new(p1)
public
The string must be a valid cipher name like “AES-128-CBC” or
“3DES”.
A list of cipher names is available by calling OpenSSL::Cipher.ciphers.
static VALUE
ossl_cipher_initialize(VALUE self, VALUE str)
{
EVP_CIPHER_CTX *ctx;
const EVP_CIPHER *cipher;
char *name;
name = StringValueCStr(str);
GetCipherInit(self, ctx);
if (ctx) {
ossl_raise(rb_eRuntimeError, "Cipher already initialized!");
}
AllocCipher(self, ctx);
if (!(cipher = EVP_get_cipherbyname(name))) {
ossl_raise(rb_eRuntimeError, "unsupported cipher algorithm (%"PRIsVALUE")", str);
}
if (EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, -1) != 1)
ossl_raise(eCipherError, NULL);
return self;
}