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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/doc/crypto/CRYPTO_set_ex_data.pod | |
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Diffstat (limited to 'openssl/doc/crypto/CRYPTO_set_ex_data.pod')
-rw-r--r-- | openssl/doc/crypto/CRYPTO_set_ex_data.pod | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/openssl/doc/crypto/CRYPTO_set_ex_data.pod b/openssl/doc/crypto/CRYPTO_set_ex_data.pod new file mode 100644 index 000000000..1bd5bed67 --- /dev/null +++ b/openssl/doc/crypto/CRYPTO_set_ex_data.pod @@ -0,0 +1,51 @@ +=pod + +=head1 NAME + +CRYPTO_set_ex_data, CRYPTO_get_ex_data - internal application specific data functions + +=head1 SYNOPSIS + + int CRYPTO_set_ex_data(CRYPTO_EX_DATA *r, int idx, void *arg); + + void *CRYPTO_get_ex_data(CRYPTO_EX_DATA *r, int idx); + +=head1 DESCRIPTION + +Several OpenSSL structures can have application specific data attached to them. +These functions are used internally by OpenSSL to manipulate application +specific data attached to a specific structure. + +These functions should only be used by applications to manipulate +B<CRYPTO_EX_DATA> structures passed to the B<new_func()>, B<free_func()> and +B<dup_func()> callbacks: as passed to B<RSA_get_ex_new_index()> for example. + +B<CRYPTO_set_ex_data()> is used to set application specific data, the data is +supplied in the B<arg> parameter and its precise meaning is up to the +application. + +B<CRYPTO_get_ex_data()> is used to retrieve application specific data. The data +is returned to the application, this will be the same value as supplied to +a previous B<CRYPTO_set_ex_data()> call. + +=head1 RETURN VALUES + +B<CRYPTO_set_ex_data()> returns 1 on success or 0 on failure. + +B<CRYPTO_get_ex_data()> returns the application data or 0 on failure. 0 may also +be valid application data but currently it can only fail if given an invalid B<idx> +parameter. + +On failure an error code can be obtained from L<ERR_get_error(3)|ERR_get_error(3)>. + +=head1 SEE ALSO + +L<RSA_get_ex_new_index(3)|RSA_get_ex_new_index(3)>, +L<DSA_get_ex_new_index(3)|DSA_get_ex_new_index(3)>, +L<DH_get_ex_new_index(3)|DH_get_ex_new_index(3)> + +=head1 HISTORY + +CRYPTO_set_ex_data() and CRYPTO_get_ex_data() have been available since SSLeay 0.9.0. + +=cut |