EVP_OpenInit man page on Gentoo

Man page or keyword search:  
man Server   6889 pages
apropos Keyword Search (all sections)
Output format
Gentoo logo
[printable version]

EVP_OpenInit(3)			    OpenSSL		       EVP_OpenInit(3)

NAME
       EVP_OpenInit, EVP_OpenUpdate, EVP_OpenFinal - EVP envelope decryption

SYNOPSIS
	#include <openssl/evp.h>

	int EVP_OpenInit(EVP_CIPHER_CTX *ctx,EVP_CIPHER *type,unsigned char *ek,
		       int ekl,unsigned char *iv,EVP_PKEY *priv);
	int EVP_OpenUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,
		int *outl, unsigned char *in, int inl);
	int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out,
		int *outl);

DESCRIPTION
       The EVP envelope routines are a high level interface to envelope
       decryption. They decrypt a public key encrypted symmetric key and then
       decrypt data using it.

       EVP_OpenInit() initializes a cipher context ctx for decryption with
       cipher type. It decrypts the encrypted symmetric key of length ekl
       bytes passed in the ek parameter using the private key priv.  The IV is
       supplied in the iv parameter.

       EVP_OpenUpdate() and EVP_OpenFinal() have exactly the same properties
       as the EVP_DecryptUpdate() and EVP_DecryptFinal() routines, as
       documented on the EVP_EncryptInit(3) manual page.

NOTES
       It is possible to call EVP_OpenInit() twice in the same way as
       EVP_DecryptInit(). The first call should have priv set to NULL and
       (after setting any cipher parameters) it should be called again with
       type set to NULL.

       If the cipher passed in the type parameter is a variable length cipher
       then the key length will be set to the value of the recovered key
       length. If the cipher is a fixed length cipher then the recovered key
       length must match the fixed cipher length.

RETURN VALUES
       EVP_OpenInit() returns 0 on error or a non zero integer (actually the
       recovered secret key size) if successful.

       EVP_OpenUpdate() returns 1 for success or 0 for failure.

       EVP_OpenFinal() returns 0 if the decrypt failed or 1 for success.

SEE ALSO
       evp(3), rand(3), EVP_EncryptInit(3), EVP_SealInit(3)

HISTORY
1.0.1g				  2014-03-17		       EVP_OpenInit(3)
[top]

List of man pages available for Gentoo

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net