atproto utils for zig
zat.dev
atproto
sdk
zig
replace libc gettimeofday with Io.Timestamp in jwt/oauth
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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build.zig.zon
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build.zig.zon
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src/internal/crypto/jwt.zig
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src/internal/crypto/jwt.zig
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const std = @import("std");
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const crypto = std.crypto;
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const Io = std.Io;
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const json = @import("../xrpc/json.zig");
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const multibase = @import("multibase.zig");
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const multicodec = @import("multicodec.zig");
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fn timestamp() i64 {
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var tv: std.c.timeval = undefined;
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_ = std.c.gettimeofday(&tv, null);
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return tv.sec;
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fn timestamp(io: Io) i64 {
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return @intCast(@divFloor(Io.Timestamp.now(io, .real).nanoseconds, std.time.ns_per_s));
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}
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/// JWT signing algorithm
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}
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/// check if the token is expired
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pub fn isExpired(self: *const Jwt) bool {
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const now = timestamp();
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pub fn isExpired(self: *const Jwt, io: Io) bool {
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const now = timestamp(io);
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return now > self.payload.exp;
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}
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/// check if the token is expired with clock skew tolerance (in seconds)
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pub fn isExpiredWithSkew(self: *const Jwt, skew_seconds: i64) bool {
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const now = timestamp();
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pub fn isExpiredWithSkew(self: *const Jwt, io: Io, skew_seconds: i64) bool {
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const now = timestamp(io);
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return now > (self.payload.exp + skew_seconds);
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}
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src/internal/oauth.zig
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src/internal/oauth.zig
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const std = @import("std");
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const crypto = std.crypto;
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const Io = std.Io;
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const Allocator = std.mem.Allocator;
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const Keypair = @import("crypto/keypair.zig").Keypair;
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const jwt = @import("crypto/jwt.zig");
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fn timestamp() i64 {
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var tv: std.c.timeval = undefined;
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_ = std.c.gettimeofday(&tv, null);
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return tv.sec;
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fn timestamp(io: Io) i64 {
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return @intCast(@divFloor(Io.Timestamp.now(io, .real).nanoseconds, std.time.ns_per_s));
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}
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/// create a signed JWT from header and payload JSON strings.
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defer allocator.free(jti);
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const alg = @tagName(keypair.algorithm());
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const now = timestamp();
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const now = timestamp(io);
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// header: {"typ":"dpop+jwt","alg":"...","jwk":{...}}
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const header = try std.fmt.allocPrint(allocator,
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defer allocator.free(kid);
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const alg = @tagName(keypair.algorithm());
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const now = timestamp();
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const now = timestamp(io);
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const header = try std.fmt.allocPrint(allocator,
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\\{{"typ":"JWT","alg":"{s}","kid":"{s}"}}