Comment on the encoding of the message counter.
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2 changed files with 8 additions and 8 deletions
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@ -88,10 +88,10 @@ static size_t _init_group_session_keys(
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}
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uint32_t counter = 0;
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counter <<= 8; counter |= *ptr++;
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counter <<= 8; counter |= *ptr++;
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counter <<= 8; counter |= *ptr++;
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counter <<= 8; counter |= *ptr++;
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// Decode counter as a big endian 32-bit number.
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for (unsigned i = 0; i < 4; i++) {
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counter <<= 8; counter |= *ptr++;
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}
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megolm_init(&session->initial_ratchet, ptr, counter);
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megolm_init(&session->latest_ratchet, ptr, counter);
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@ -337,10 +337,10 @@ size_t olm_outbound_group_session_key(
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*ptr++ = SESSION_KEY_VERSION;
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uint32_t counter = session->ratchet.counter;
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*ptr++ = 0xFF & (counter >> 24); counter <<= 8;
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*ptr++ = 0xFF & (counter >> 24); counter <<= 8;
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*ptr++ = 0xFF & (counter >> 24); counter <<= 8;
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*ptr++ = 0xFF & (counter >> 24); counter <<= 8;
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// Encode counter as a big endian 32-bit number.
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if (unsigned i = 0; i < 4; i++) {
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*ptr++ = 0xFF & (counter >> 24); counter <<= 8;
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}
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memcpy(ptr, megolm_get_data(&session->ratchet), MEGOLM_RATCHET_LENGTH);
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ptr += MEGOLM_RATCHET_LENGTH;
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