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two phase init of aes encoder/decoder

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This commit is contained in:
Daniel Larimer 2013-09-05 19:02:10 -04:00
parent be836e3e47
commit 8c95d62c9e
2 changed files with 11 additions and 7 deletions
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6
include/fc/crypto/aes.hpp
View file

@ -11,9 +11,10 @@ namespace fc {
class aes_encoder class aes_encoder
{ {
public: public:
aes_encoder( const fc::sha256& key, const fc::uint128& init_value ); aes_encoder();
~aes_encoder(); ~aes_encoder();
void init( const fc::sha256& key, const fc::uint128& init_value );
uint32_t encode( const char* plaintxt, uint32_t len, const char* ciphertxt ); uint32_t encode( const char* plaintxt, uint32_t len, const char* ciphertxt );
uint32_t final_encode( const char* ciphertxt ); uint32_t final_encode( const char* ciphertxt );
@ -24,9 +25,10 @@ namespace fc {
class aes_decoder class aes_decoder
{ {
public: public:
aes_decoder( const fc::sha256& key, const fc::uint128& init_value ); aes_decoder();
~aes_decoder(); ~aes_decoder();
void init( const fc::sha256& key, const fc::uint128& init_value );
uint32_t encode( const char* plaintxt, uint32_t len, const char* ciphertxt ); uint32_t encode( const char* plaintxt, uint32_t len, const char* ciphertxt );
uint32_t final_encode( const char* ciphertxt ); uint32_t final_encode( const char* ciphertxt );

12
src/crypto/aes.cpp
View file

@ -15,7 +15,11 @@ struct aes_encoder::impl
evp_cipher_ctx ctx; evp_cipher_ctx ctx;
}; };
aes_encoder::aes_encoder( const fc::sha256& key, const fc::uint128& init_value ) aes_encoder::aes_encoder(){}
aes_encoder::~aes_encoder()
{
}
void aes_encoder::init( const fc::sha256& key, const fc::uint128& init_value )
{ {
my->ctx.obj = EVP_CIPHER_CTX_new(); my->ctx.obj = EVP_CIPHER_CTX_new();
/* Create and initialise the context */ /* Create and initialise the context */
@ -36,9 +40,6 @@ aes_encoder::aes_encoder( const fc::sha256& key, const fc::uint128& init_value )
("s", ERR_error_string( ERR_get_error(), nullptr) ) ); ("s", ERR_error_string( ERR_get_error(), nullptr) ) );
} }
} }
aes_encoder::~aes_encoder()
{
}
uint32_t aes_encoder::encode( const char* plaintxt, uint32_t plaintext_len, const char* ciphertxt ) uint32_t aes_encoder::encode( const char* plaintxt, uint32_t plaintext_len, const char* ciphertxt )
{ {
@ -73,7 +74,8 @@ struct aes_decoder::impl
evp_cipher_ctx ctx; evp_cipher_ctx ctx;
}; };
aes_decoder::aes_decoder( const fc::sha256& key, const fc::uint128& init_value ) aes_decoder::aes_decoder(){}
void aes_decoder::init( const fc::sha256& key, const fc::uint128& init_value )
{ {
my->ctx.obj = EVP_CIPHER_CTX_new(); my->ctx.obj = EVP_CIPHER_CTX_new();
/* Create and initialise the context */ /* Create and initialise the context */