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Fix subtle bug in tlv deserialization of TLV_TYPE_KEYSIGNATURETYPE

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When using -O2, the variable currType is optimized out, so the
signature is added with the wrong sign type. Then when verifying the
data the signature is not found and verification fails.

The main sympton of this bug was receiving no more forum/channel posts.

Wit debug builds (-O0) this worked, that's why not every one was affected
by this.

This bug was introduced in 2012 (58cfebb493)
This commit is contained in:
AsamK 2015-09-02 02:03:46 +02:00
parent 34a3f10755
commit 9441601287
1 changed files with 1 additions and 5 deletions
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6
src/serialiser/rstlvkeys.cc
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@ -649,7 +649,6 @@ bool RsTlvKeySignatureSet::GetTlv(void *data, uint32_t size, uint32_t *offset)
/* get the next type */
uint16_t tlvsubtype = GetTlvType( &(((uint8_t *) data)[*offset]) );
SignType currType;
switch(tlvsubtype)
{
@ -659,16 +658,13 @@ bool RsTlvKeySignatureSet::GetTlv(void *data, uint32_t size, uint32_t *offset)
ok &= sign.GetTlv(data, size, offset);
if (ok)
{
keySignSet[currType] = sign;
keySignSet[sign_type] = sign;
}
}
break;
case TLV_TYPE_KEYSIGNATURETYPE:
{
ok = GetTlvUInt32(data, size, offset, TLV_TYPE_KEYSIGNATURETYPE, &sign_type);
if(ok)
currType = sign_type;
}
break;
default: