EVP_PKEY_CTX_get_algor¶

NAME¶

EVP_CIPHER_CTX_get_algor, EVP_CIPHER_CTX_get_algor_params, EVP_CIPHER_CTX_set_algor_params, EVP_PKEY_CTX_get_algor, EVP_PKEY_CTX_get_algor_params, EVP_PKEY_CTX_set_algor_params - pass AlgorithmIdentifier and its params to/from algorithm implementations

SYNOPSIS¶

int EVP_TYPE_CTX_get_algor(EVP_TYPE_CTX *ctx, X509_ALGOR **alg);
int EVP_TYPE_CTX_get_algor_params(EVP_TYPE_CTX *ctx, X509_ALGOR *alg);
int EVP_TYPE_CTX_set_algor_params(EVP_TYPE_CTX *ctx, const X509_ALGOR *alg);

DESCRIPTION¶

In the description here and the "SYNOPSIS" above, TYPE is used as a placeholder for any EVP operation type.

EVP_TYPE_CTX_get_algor() attempts to retrieve a complete AlgorithmIdentifier from the EVP_TYPE implementation, and populates *alg with it. If alg is NULL, calling this function will serve to see if calling this function is supported at all by the EVP_TYPE implementation. If *alg is NULL, space will be allocated automatically, and assigned to *alg.

EVP_TYPE_CTX_get_algor_params() attempts to retrieve the parameters part of an AlgorithmIdentifier from the EVP_TYPE implementation, and populates alg-_parameters> with it. If _alg is NULL, calling this function will serve to see if calling this function is supported at all by the EVP_TYPE implementation. If alg->parameters is NULL, space will be allocated automatically, and assigned to alg->parameters. If alg->parameters is not NULL, its previous contents will be overwritten with the retrieved AlgorithmIdentifier parameters. Beware!

EVP_TYPE_CTX_set_algor_params() attempts to pass alg->parameters to the EVP_TYPE implementation. If alg is NULL, calling this function will serve to see if calling this function is supported at all by the EVP_TYPE implementation.

RETURN VALUES¶

All functions return 1 for success, and 0 or a negative number if an error occurs. In particular, -2 is returned when the function isn't supported by the EVP_TYPE implementation.

COPYRIGHT¶

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at https://www.openssl.org/source/license.html.