01-02-2013
There are transforms like soundex that nullify spelling differences.
Regex that tolerates missing or extra every byte of key gets too loose, fast. You might construct an extended regex where for a n byte key, bytes 1 through n only are *, so it matches n-1 bytes.\, e.g., for 'abcd', 'a*bcd|ab*cd|abc*d|abcd*'.
I suppose you could write a scoring system for how many extra or missing in key match, and sort by the score, cut off at an 80% score or something.
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LEARN ABOUT CENTOS
evp_pkey_missing_parameters
EVP_PKEY_cmp(3) OpenSSL EVP_PKEY_cmp(3)
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 paramters (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 2013-02-11 EVP_PKEY_cmp(3)