EVP_PKEY_CTX_new (3)
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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 andENGINE
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
TheEVP_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 allocatedEVP_PKEY_CTX
structure of NULL
if an error occurred.
EVP_PKEY_CTX_free() does not return a value.