Function cose_sign_verify_first

pub unsafe extern "C" fn cose_sign_verify_first(
    sign: *const cose_sign_dec_t,
    key: *mut cose_key_t,
    buf: *mut u8,
    len: size_t,
) -> c_int

Wrapper function to attempt signature verification with the first signature in the structure

@param sign The sign object to verify @param key The key to verify with @param buf Buffer to write in @param len Size of the buffer to write in

@return 0 on verification success @return Negative on error