06-03-2009
SSL Public key/Private question
Hi everyone,
I have a quick/newb question:
I know that a public key is used to encrypt data and a private key is used to decrypt data but who keeps the public/private keys??
Does the Web Server hold both?
Does the Web Server have the public key and does the client have the private key?
Does the Client have both?
When I create a key using the openssl command (e.g. openssl genrsa -des3 -out server.key 4096) is that the private or public key??
Please help, thanks.
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LEARN ABOUT DEBIAN
evp_pkey_cmp
EVP_PKEY_cmp(3SSL) OpenSSL EVP_PKEY_cmp(3SSL)
NAME
EVP_PKEY_copy_parameters, EVP_PKEY_missing_parameters, EVP_PKEY_cmp_parameters, EVP_PKEY_cmp - public key parameter and comparison
functions
SYNOPSIS
#include <openssl/evp.h>
int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey);
int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from);
int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b);
int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b);
DESCRIPTION
The function EVP_PKEY_missing_parameters() returns 1 if the public key parameters of pkey are missing and 0 if they are present or the
algorithm doesn't use parameters.
The function EVP_PKEY_copy_parameters() copies the parameters from key from to key to.
The funcion EVP_PKEY_cmp_parameters() compares the parameters of keys a and b.
The funcion EVP_PKEY_cmp() compares the public key components and parameters (if present) of keys a and b.
NOTES
The main purpose of the functions EVP_PKEY_missing_parameters() and EVP_PKEY_copy_parameters() is to handle public keys in certificates
where the parameters are sometimes omitted from a public key if they are inherited from the CA that signed it.
Since OpenSSL private keys contain public key components too the function EVP_PKEY_cmp() can also be used to determine if a private key
matches a public key.
RETURN VALUES
The function EVP_PKEY_missing_parameters() returns 1 if the public key parameters of pkey are missing and 0 if they are present or the
algorithm doesn't use parameters.
These functions EVP_PKEY_copy_parameters() returns 1 for success and 0 for failure.
The function EVP_PKEY_cmp_parameters() and EVP_PKEY_cmp() return 1 if the keys match, 0 if they don't match, -1 if the key types are
different and -2 if the operation is not supported.
SEE ALSO
EVP_PKEY_CTX_new(3), EVP_PKEY_keygen(3)
1.0.1e 2014-08-06 EVP_PKEY_cmp(3SSL)