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HMAC SHA-1 Matching FIPS Examples

See more Encryption Examples

Provides an example of computing an HMAC-SHA1 digest to duplicate the FIPS examples at http://csrc.nist.gov/publications/fips/fips198/fips-198a.pdf Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    const crypt = try chilkat.Crypt2.init();
    defer crypt.deinit();

    const str_to_sign = "Sample #1";

    // 64-byte key
    const key = "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f";

    // The expected result:
    // (from Appendix A.1 at http://csrc.nist.gov/publications/fips/fips198/fips-198a.pdf )
    const expected_result = "4f4ca3d5d68ba7cc0a1208c9c61e9c5da0403c0a";

    // Here is the code to duplicate the results:
    crypt.setHashAlgorithm("sha-1");
    crypt.setEncodingMode("hex");
    crypt.setMacAlgorithm("hmac");

    crypt.setMacKeyEncoded(key, "hex") catch {};

    const mac = try crypt.macStringENC(alloc, str_to_sign);

    std.debug.print("Computed: {s}\n", .{mac});
    std.debug.print("Expected: {s}\n", .{expected_result});
}