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NAMEEVP_PKEY_decrypt_init, EVP_PKEY_decrypt - decrypt using a public key algorithm
SYNOPSIS#include <openssl/evp.h> int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx); int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char *in, size_t inlen);
DESCRIPTIONThe The
NOTESAfter the call to The function
RETURN VALUES
EXAMPLESDecrypt data using OAEP (for RSA keys): #include <openssl/evp.h> #include <openssl/rsa.h> EVP_PKEY_CTX *ctx; ENGINE *eng; unsigned char *out, *in; size_t outlen, inlen; EVP_PKEY *key; /* * NB: assumes key, eng, in, inlen are already set up * and that key is an RSA private key */ ctx = EVP_PKEY_CTX_new(key, eng); if (!ctx) /* Error occurred */ if (EVP_PKEY_decrypt_init(ctx) <= 0) /* Error */ if (EVP_PKEY_CTX_set_rsa_padding(ctx, RSA_OAEP_PADDING) <= 0) /* Error */ /* Determine buffer length */ if (EVP_PKEY_decrypt(ctx, NULL, &outlen, in, inlen) <= 0) /* Error */ out = OPENSSL_malloc(outlen); if (!out) /* malloc failure */ if (EVP_PKEY_decrypt(ctx, out, &outlen, in, inlen) <= 0) /* Error */ /* Decrypted data is outlen bytes written to buffer out */
SEE ALSOEVP_PKEY_CTX_new(3), EVP_PKEY_encrypt(3), EVP_PKEY_sign(3), EVP_PKEY_verify(3), EVP_PKEY_verify_recover(3), EVP_PKEY_derive(3)
HISTORYThese functions were added in OpenSSL 1.0.0.
COPYRIGHTCopyright 2006-2019 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (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. |
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