EVP_OpenInit, EVP_OpenUpdate, EVP_OpenFinal - EVP envelope decryption
int EVP_OpenInit(EVP_CIPHER_CTX *ctx, EVP_CIPHER *type, unsigned char *ek,
int ekl, unsigned char *iv, EVP_PKEY *priv);
int EVP_OpenUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,
int *outl, unsigned char *in, int inl);
int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl);
The EVP envelope routines are a high level interface to envelope decryption.
They decrypt a public key encrypted symmetric key and then decrypt data using
initializes a cipher context ctx
with cipher type
. It decrypts the encrypted symmetric key of length
bytes passed in the ek
parameter using the private key
. The IV is supplied in the iv
have exactly the same
properties as the EVP_DecryptUpdate()
routines, as documented on the EVP_EncryptInit
(3) manual page.
It is possible to call EVP_OpenInit()
twice in the same way as
. The first call should have priv
set to NULL
and (after setting any cipher parameters) it should be called again with
set to NULL.
If the cipher passed in the type
parameter is a variable length cipher
then the key length will be set to the value of the recovered key length. If
the cipher is a fixed length cipher then the recovered key length must match
the fixed cipher length.
returns 0 on error or a non zero integer (actually the
recovered secret key size) if successful.
returns 1 for success or 0 for failure.
returns 0 if the decrypt failed or 1 for success.
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Licensed under the OpenSSL license (the "License"). You may not use
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