DSA_SIG_new() allocates an empty DSA_SIG structure.
DSA_SIG_free() frees the DSA_SIG structure and its components. The values are erased before the memory is returned to the system.
DSA_SIG_get0() returns internal pointers to the r and s values contained in sig.
The r and s values can be set by calling DSA_SIG_set0() and passing the new values for r and s as parameters to the function. Calling this function transfers the memory management of the values to the DSA_SIG object, and therefore the values that have been passed in should not be freed directly after this function has been called.
RETURN VALUES
If the allocation fails, DSA_SIG_new() returns NULL and sets an error code that can be obtained by ERR_get_error(3). Otherwise it returns a pointer to the newly allocated structure.
DSA_SIG_free() returns no value.
DSA_SIG_set0() returns 1 on success or 0 on failure.
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Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at https://www.openssl.org/source/license.html.