[5.0.x] Safety: check length during deserialization #3549
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quentinlesceller
approved these changes
Jan 21, 2021
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Investigation into mimblewimble/grin-wallet#576 led me to the
secp_sercode, where we attempt to take a byte slice of length 32. If the original vec is shorter, attempting to take a slice of that length will result in a panic. To prevent this we should first check the length of the vector and return an error if its too short.We do something similar in 2 other places so I decided to fix those too.