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Fix aliasing issue in storage_set_counter().
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@ -105,8 +105,8 @@
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// The length of the ChaCha20 block in bytes.
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#define CHACHA20_BLOCK_SIZE 64
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// The length of the counter tail in bytes.
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#define COUNTER_TAIL_LEN 8
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// The length of the counter tail in words.
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#define COUNTER_TAIL_WORDS 2
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// Values used in the guard key integrity check.
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#define GUARD_KEY_MODULUS 6311
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@ -979,9 +979,9 @@ secbool storage_set_counter(const uint16_t key, const uint32_t count)
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// The count is stored as a 32-bit integer followed by a tail of "1" bits,
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// which is used as a tally.
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uint8_t value[sizeof(count) + COUNTER_TAIL_LEN];
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uint32_t value[1 + COUNTER_TAIL_WORDS];
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memset(value, 0xff, sizeof(value));
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*((uint32_t*)value) = count;
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value[0] = count;
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return storage_set(key, value, sizeof(value));
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}
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