It's funny how we're looking at the same text and arriving at opposite meanings.
Let me highlight some things from your quotes.
1. "Except that the problem is not in the python wrapper"
- This directly says that the Python author is not being malicious---how can he be since he isn't at fault for the error?
The essayist continues to explain why the Python author is not at fault.
2. "You can find bcrypt test vectors on the web, and they are all 60-byte strings."
- This bug is wide-spread.
3. "That is a very big discrepancy between the actual behavior of the code and the description given in the literature. It's vastly too big a discrepancy to be explainable by a simple inadvertent bug."
- The bug is too large to be an inadverdent bug introduced independently by every author.
4. "Now, some people might say I'm being excessively paranoid, but I don't think so. <snip>"
Here the author is only defending his rationale for looking for bugs in an open source project. He isn't implying that he has now found one that shows the authors are malicious.
Let me highlight some things from your quotes.
1. "Except that the problem is not in the python wrapper"
- This directly says that the Python author is not being malicious---how can he be since he isn't at fault for the error?
The essayist continues to explain why the Python author is not at fault.
2. "You can find bcrypt test vectors on the web, and they are all 60-byte strings."
- This bug is wide-spread.
3. "That is a very big discrepancy between the actual behavior of the code and the description given in the literature. It's vastly too big a discrepancy to be explainable by a simple inadvertent bug."
- The bug is too large to be an inadverdent bug introduced independently by every author.
4. "Now, some people might say I'm being excessively paranoid, but I don't think so. <snip>"
Here the author is only defending his rationale for looking for bugs in an open source project. He isn't implying that he has now found one that shows the authors are malicious.