=head1 NAME
-EVP_PKEY_decrypt_init, EVP_PKEY_decrypt - decrypt using a public key algorithm
+EVP_PKEY_decrypt_init, EVP_PKEY_decrypt_init_ex,
+EVP_PKEY_decrypt - decrypt using a public key algorithm
=head1 SYNOPSIS
#include <openssl/evp.h>
int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx);
+ int EVP_PKEY_decrypt_init_ex(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[]);
int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx,
unsigned char *out, size_t *outlen,
const unsigned char *in, size_t inlen);
The EVP_PKEY_decrypt_init() function initializes a public key algorithm
context using key B<pkey> for a decryption operation.
+The EVP_PKEY_decrypt_init_ex() function initializes a public key algorithm
+context using key B<pkey> for a decryption operation and sets the
+algorithm specific B<params>.
+
The EVP_PKEY_decrypt() function performs a public key decryption operation
using B<ctx>. The data to be decrypted is specified using the B<in> and
B<inlen> parameters. If B<out> is B<NULL> then the maximum size of the output
After the call to EVP_PKEY_decrypt_init() algorithm specific control
operations can be performed to set any appropriate parameters for the
-operation.
+operation. These operations can be included in the EVP_PKEY_decrypt_init_ex()
+call.
The function EVP_PKEY_decrypt() can be called more than once on the same
context if several operations are performed using the same parameters.
=head1 RETURN VALUES
-EVP_PKEY_decrypt_init() and EVP_PKEY_decrypt() return 1 for success and 0
-or a negative value for failure. In particular a return value of -2
-indicates the operation is not supported by the public key algorithm.
+EVP_PKEY_decrypt_init(), EVP_PKEY_decrypt_init_ex() and EVP_PKEY_decrypt()
+return 1 for success and 0 or a negative value for failure. In particular a
+return value of -2 indicates the operation is not supported by the public key
+algorithm.
-=head1 EXAMPLE
+=head1 EXAMPLES
Decrypt data using OAEP (for RSA keys):
=head1 HISTORY
-These functions were first added to OpenSSL 1.0.0.
+These functions were added in OpenSSL 1.0.0.
=head1 COPYRIGHT
-Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2006-2021 The OpenSSL Project Authors. All Rights Reserved.
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