mbedtls_x509write_csr_der() function
Write a CSR (Certificate Signing Request) to a DER structure Note: data is written at the end of the buffer! Use the return value to determine where you should start using the buffer
Arguments
f_rng
RNG function. This must not be \c NULL.
Return value
length of data written if successful, or a specific error code
Notes
\p f_rng is used for the signature operation.