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Code Issues Releases Activity

transient key signature verification

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orignal 2019-01-02 09:43:18 -05:00
parent bce4224d6e
commit 2e56c4895d
1 changed files with 4 additions and 8 deletions
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12
libi2pd/LeaseSet.cpp
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@ -249,6 +249,9 @@ namespace data
if (flags & 0x0001) if (flags & 0x0001)
{ {
// offline key // offline key
if (offset + 6 >= len) return;
const uint8_t * signedData = buf + offset;
offset += 4; // expires timestamp
uint16_t keyType = bufbe16toh (buf + offset); offset += 2; uint16_t keyType = bufbe16toh (buf + offset); offset += 2;
offlineVerifier.reset (i2p::data::IdentityEx::CreateVerifier (keyType)); offlineVerifier.reset (i2p::data::IdentityEx::CreateVerifier (keyType));
if (!offlineVerifier) return; if (!offlineVerifier) return;
@ -256,16 +259,9 @@ namespace data
if (offset + keyLen >= len) return; if (offset + keyLen >= len) return;
offlineVerifier->SetPublicKey (buf + offset); offset += keyLen; offlineVerifier->SetPublicKey (buf + offset); offset += keyLen;
if (offset + offlineVerifier->GetSignatureLen () >= len) return; if (offset + offlineVerifier->GetSignatureLen () >= len) return;
uint8_t * signedData = new uint8_t[keyLen + 6]; if (!identity->Verify (signedData, keyLen + 6, buf + offset)) return;
htobe32buf (signedData, timestamp + expires);
htobe16buf (signedData + 4, keyType);
memcpy (signedData + 6, buf + offset - keyLen, keyLen);
bool verified = identity->Verify (signedData, keyLen + 6, buf + offset);
delete[] signedData;
if (!verified) return;
offset += offlineVerifier->GetSignatureLen (); offset += offlineVerifier->GetSignatureLen ();
} }
// properties // properties
uint16_t propertiesLen = bufbe16toh (buf + offset); offset += 2; uint16_t propertiesLen = bufbe16toh (buf + offset); offset += 2;
offset += propertiesLen; // skip for now. TODO: implement properties offset += propertiesLen; // skip for now. TODO: implement properties