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Diffstat (limited to 'doc/man3/OSSL_PARAM.pod')
| -rw-r--r-- | doc/man3/OSSL_PARAM.pod | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/man3/OSSL_PARAM.pod b/doc/man3/OSSL_PARAM.pod index fdf376a206..99f4e2ce62 100644 --- a/doc/man3/OSSL_PARAM.pod +++ b/doc/man3/OSSL_PARAM.pod @@ -97,6 +97,13 @@ setting parameters) or shall (when requesting parameters) be stored, and I<data_size> is its size in bytes. The organization of the data depends on the parameter type and flag. +The I<data_size> needs special attention with the parameter type +B<OSSL_PARAM_UTF8_STRING> in relation to C strings. When setting +parameters, the size should be set to the length of the string, not +counting the terminating NUL byte. When requesting parameters, the +size should be set to the size of the buffer to be populated, which +should accomodate enough space for a terminating NUL byte. + When I<requesting parameters>, it's acceptable for I<data> to be NULL. This can be used by the I<requestor> to figure out dynamically exactly how much buffer space is needed to store the parameter data. |