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diff --git a/security/pkix/lib/pkixder.cpp b/security/pkix/lib/pkixder.cpp
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--- a/security/pkix/lib/pkixder.cpp
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+++ b/security/pkix/lib/pkixder.cpp
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@@ -466,28 +466,63 @@ TimeChoice(Reader& tagged, uint8_t expec
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if (rv != Success) {
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return rv;
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}
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uint8_t b;
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if (input.Read(b) != Success) {
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return Result::ERROR_INVALID_DER_TIME;
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}
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- if (b != 'Z') {
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+
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+ unsigned int hourOffset = 0;
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+ unsigned int minuteOffset = 0;
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+ bool allowOffset = false;
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+ bool haveOffset = false;
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+ bool offsetIsPositive = false;
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+
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+ if (getenv("PKIX_ALLOW_CERT_UTCTIME_OFFSET") != 0) {
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+ allowOffset = true;
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+ }
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+
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+ if (allowOffset && (b == '+' || b == '-')) {
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+ haveOffset = true;
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+ rv = ReadTwoDigits(input, 0u, 23u, hourOffset);
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+ if (rv != Success) {
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+ return rv;
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+ }
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+ rv = ReadTwoDigits(input, 0u, 59u, minuteOffset);
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+ if (rv != Success) {
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+ return rv;
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+ }
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+ if (b == '+') {
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+ offsetIsPositive = true;
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+ }
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+ } else if (b != 'Z') {
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return Result::ERROR_INVALID_DER_TIME;
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}
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if (End(input) != Success) {
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return Result::ERROR_INVALID_DER_TIME;
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}
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uint64_t totalSeconds = (static_cast<uint64_t>(days) * 24u * 60u * 60u) +
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(static_cast<uint64_t>(hours) * 60u * 60u) +
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(static_cast<uint64_t>(minutes) * 60u) +
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seconds;
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+ if (haveOffset) {
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+ uint64_t offsetInSeconds =
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+ (static_cast<uint64_t>(hourOffset) * 60u * 60u) +
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+ (static_cast<uint64_t>(minuteOffset) * 60u);
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+ if (offsetIsPositive) {
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+ totalSeconds -= offsetInSeconds;
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+ } else {
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+ totalSeconds += offsetInSeconds;
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+ }
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+ }
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+
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time = TimeFromElapsedSecondsAD(totalSeconds);
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return Success;
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}
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Result
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IntegralBytes(Reader& input, uint8_t tag,
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IntegralValueRestriction valueRestriction,
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/*out*/ Input& value,
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