diff options
Diffstat (limited to 'doc/man3/OSSL_PARAM_int.pod')
| -rw-r--r-- | doc/man3/OSSL_PARAM_int.pod | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/doc/man3/OSSL_PARAM_int.pod b/doc/man3/OSSL_PARAM_int.pod index d637d94f8a..25b87014b7 100644 --- a/doc/man3/OSSL_PARAM_int.pod +++ b/doc/man3/OSSL_PARAM_int.pod @@ -184,8 +184,7 @@ size I<rsize> is created. OSSL_PARAM_construct_utf8_string() is a function that constructs a UTF8 string OSSL_PARAM structure. A parameter with name I<key>, storage I<buf> and size I<bsize> is created. -If I<bsize> is zero, the string length is determined using strlen(3) + 1 for the -null termination byte. +If I<bsize> is zero, the string length is determined using strlen(3). Generally pass zero for I<bsize> instead of calling strlen(3) yourself. OSSL_PARAM_construct_octet_string() is a function that constructs an OCTET @@ -232,15 +231,18 @@ will be assigned the size the parameter's I<data> buffer should have. OSSL_PARAM_get_utf8_string() retrieves a UTF8 string from the parameter pointed to by I<p>. -The string is either stored into I<*val> with a length limit of I<max_len> or, -in the case when I<*val> is NULL, memory is allocated for the string and -I<max_len> is ignored. +The string is stored into I<*val> with a size limit of I<max_len>, +which must be large enough to accomodate a terminating NUL byte, +otherwise this function will fail. +If I<*val> is NULL, memory is allocated for the string and I<max_len> +is ignored. If memory is allocated by this function, it must be freed by the caller. OSSL_PARAM_set_utf8_string() sets a UTF8 string from the parameter pointed to by I<p> to the value referenced by I<val>. If the parameter's I<data> field is NULL, then only its I<return_size> field -will be assigned the size the parameter's I<data> buffer should have. +will be assigned the minimum size the parameter's I<data> buffer should have +to accomodate the string, including a terminating NUL byte. OSSL_PARAM_get_octet_string() retrieves an OCTET string from the parameter pointed to by I<p>. @@ -334,11 +336,11 @@ This example is for setting parameters on some object: #include <openssl/core.h> const char *foo = "some string"; - size_t foo_l = strlen(foo) + 1; + size_t foo_l = strlen(foo); const char bar[] = "some other string"; const OSSL_PARAM set[] = { OSSL_PARAM_utf8_ptr("foo", &foo, foo_l), - OSSL_PARAM_utf8_string("bar", bar, sizeof(bar)), + OSSL_PARAM_utf8_string("bar", bar, sizeof(bar) - 1), OSSL_PARAM_END }; @@ -366,7 +368,7 @@ could fill in the parameters like this: if ((p = OSSL_PARAM_locate(params, "foo")) != NULL) OSSL_PARAM_set_utf8_ptr(p, "foo value"); if ((p = OSSL_PARAM_locate(params, "bar")) != NULL) - OSSL_PARAM_set_utf8_ptr(p, "bar value"); + OSSL_PARAM_set_utf8_string(p, "bar value"); if ((p = OSSL_PARAM_locate(params, "cookie")) != NULL) OSSL_PARAM_set_utf8_ptr(p, "cookie value"); |