NAME¶
EVP_PKEY_CTX_new, EVP_PKEY_CTX_new_id, EVP_PKEY_CTX_dup, EVP_PKEY_CTX_free -
public key algorithm context functions.
SYNOPSIS¶
#include <openssl/evp.h>
EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e);
EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e);
EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *ctx);
void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx);
DESCRIPTION¶
The
EVP_PKEY_CTX_new() function allocates public key algorithm context
using the algorithm specified in
pkey and ENGINE
e.
The
EVP_PKEY_CTX_new_id() function allocates public key algorithm context
using the algorithm specified by
id and ENGINE
e. It is normally
used when no
EVP_PKEY structure is associated with the operations, for
example during parameter generation of key genration for some algorithms.
EVP_PKEY_CTX_dup() duplicates the context
ctx.
EVP_PKEY_CTX_free() frees up the context
ctx.
NOTES¶
The
EVP_PKEY_CTX structure is an opaque public key algorithm context used
by the OpenSSL high level public key API. Contexts
MUST NOT be shared
between threads: that is it is not permissible to use the same context
simultaneously in two threads.
RETURN VALUES¶
EVP_PKEY_CTX_new(),
EVP_PKEY_CTX_new_id(),
EVP_PKEY_CTX_dup() returns either the newly allocated
EVP_PKEY_CTX structure of
NULL if an error occurred.
EVP_PKEY_CTX_free() does not return a value.
SEE ALSO¶
EVP_PKEY_new(3)
HISTORY¶
These functions were first added to OpenSSL 1.0.0.