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| 1 =pod |
| 2 |
| 3 =head1 NAME |
| 4 |
| 5 EVP_PKEY_copy_parameters, EVP_PKEY_missing_parameters, EVP_PKEY_cmp_parameters,
EVP_PKEY_cmp - public key parameter and comparison functions |
| 6 |
| 7 =head1 SYNOPSIS |
| 8 |
| 9 #include <openssl/evp.h> |
| 10 |
| 11 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey); |
| 12 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from); |
| 13 |
| 14 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b); |
| 15 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b); |
| 16 |
| 17 =head1 DESCRIPTION |
| 18 |
| 19 The function EVP_PKEY_missing_parameters() returns 1 if the public key |
| 20 parameters of B<pkey> are missing and 0 if they are present or the algorithm |
| 21 doesn't use parameters. |
| 22 |
| 23 The function EVP_PKEY_copy_parameters() copies the parameters from key |
| 24 B<from> to key B<to>. |
| 25 |
| 26 The funcion EVP_PKEY_cmp_parameters() compares the parameters of keys |
| 27 B<a> and B<b>. |
| 28 |
| 29 The funcion EVP_PKEY_cmp() compares the public key components and paramters |
| 30 (if present) of keys B<a> and B<b>. |
| 31 |
| 32 =head1 NOTES |
| 33 |
| 34 The main purpose of the functions EVP_PKEY_missing_parameters() and |
| 35 EVP_PKEY_copy_parameters() is to handle public keys in certificates where the |
| 36 parameters are sometimes omitted from a public key if they are inherited from |
| 37 the CA that signed it. |
| 38 |
| 39 Since OpenSSL private keys contain public key components too the function |
| 40 EVP_PKEY_cmp() can also be used to determine if a private key matches |
| 41 a public key. |
| 42 |
| 43 =head1 RETURN VALUES |
| 44 |
| 45 The function EVP_PKEY_missing_parameters() returns 1 if the public key |
| 46 parameters of B<pkey> are missing and 0 if they are present or the algorithm |
| 47 doesn't use parameters. |
| 48 |
| 49 These functions EVP_PKEY_copy_parameters() returns 1 for success and 0 for |
| 50 failure. |
| 51 |
| 52 The function EVP_PKEY_cmp_parameters() and EVP_PKEY_cmp() return 1 if the |
| 53 keys match, 0 if they don't match, -1 if the key types are different and |
| 54 -2 if the operation is not supported. |
| 55 |
| 56 =head1 SEE ALSO |
| 57 |
| 58 L<EVP_PKEY_CTX_new(3)|EVP_PKEY_CTX_new(3)>, |
| 59 L<EVP_PKEY_keygen(3)|EVP_PKEY_keygen(3)> |
| 60 |
| 61 =cut |
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