sataniccanary | A GCC plugin implementing various stack canaries

sataniccanary is a C library. sataniccanary has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

The Satanic Canary gcc plugin implements three types of stack canaries. Two of these are currently enabled, and they are described below. This plugin is merely for testing/exploring stack canaries and what they can do for binary runtime security. I feel safe in saying that the Basic and TSC Data canaries can be used, but are not perfect. Canaries are not always impervious to compromise. Likewise, they can impart overhead to the program being executed. A canary, or stack cookie, is merely a value on the stack which is placed there at compile time in the function prologue. During runtime, at function epilogue, the sanity of that value is checked. If the value has been modified then the canary calls an abort() since the stack has been corrupted (either through bad programming or a malicious intent). The canaries are chosen at random for each function being compiled. The array of structs below in the canaries array are the canaries that can be enabled/disabled.