better ssl write handling by youknowone · Pull Request #6763 · RustPython/RustPython

# First, let's check if the file exists and view the specific lines mentioned
head -20 crates/stdlib/src/ssl/compat.rs | head -5
wc -l crates/stdlib/src/ssl/compat.rs

# Look at the specific lines mentioned (1738-1759)
sed -n '1738,1759p' crates/stdlib/src/ssl/compat.rs

# Search for PySSLSocket struct definition to see current fields
rg -n "struct PySSLSocket" crates/stdlib/src/ssl/compat.rs -A 30

# Search for write_buffered_len references to understand current usage
rg -n "write_buffered_len" crates/stdlib/src/ssl/compat.rs -B 2 -A 2

# Search for PySSLSocket struct definition
rg -n "struct PySSLSocket" crates/stdlib/src/ssl/compat.rs -B 5 -A 50

# Also search for #[pyclass] annotations for PySSLSocket
rg -n "#\[pyclass\]" crates/stdlib/src/ssl/compat.rs -B 2 -A 50 | head -150

# Search for write_buffered_len field definition
rg -n "write_buffered_len" crates/stdlib/src/ssl/compat.rs | head -20

# Try broader search for PySSLSocket without struct keyword
rg -n "PySSLSocket" crates/stdlib/src/ssl/compat.rs | head -20

# Look for pyclass macro definition
rg -n "pyclass.*PySSLSocket" crates/stdlib/src/ssl/compat.rs -B 2 -A 100 | head -200

# Search more broadly in the file for where PySSLSocket is declared
head -500 crates/stdlib/src/ssl/compat.rs | tail -400

# PySSLSocket is imported from parent module, let's find the _ssl module
fd "_ssl" crates/stdlib/src/ssl/ -type f

# Look for PySSLSocket struct in the _ssl module
rg -n "struct PySSLSocket" crates/stdlib/src/ssl/_ssl.rs -B 5 -A 50 | head -100

# Search for write_buffered_len field in _ssl.rs
rg -n "write_buffered_len" crates/stdlib/src/ssl/_ssl.rs

# Check what fields currently exist in PySSLSocket
rg -n "write_buffered" crates/stdlib/src/ssl/_ssl.rs -B 2 -A 2

# Find all files in the ssl directory
ls -la crates/stdlib/src/ssl/

# Search for PySSLSocket definition across the entire ssl directory
rg -n "struct PySSLSocket" crates/stdlib/src/ssl/

# Search for where write_buffered_len is first created/initialized
rg -n "write_buffered_len.*=" crates/stdlib/src/ssl/ -B 3 -A 1

# Search for the parent module structure
ls -la crates/stdlib/src/ssl/mod.rs

# Look for PySSLSocket in the mod.rs file
rg -n "PySSLSocket" crates/stdlib/src/ssl/mod.rs -B 5 -A 50 | head -200

# Search for #[pyclass] in all ssl files to find PySSLSocket definition
rg -n "#\[pyclass\]" crates/stdlib/src/ssl/ -A 30 | grep -A 30 "PySSLSocket"

# Try to find where PySSLSocket is actually defined (might be inline in compat.rs)
rg -n "^pub.*struct PySSLSocket" crates/stdlib/src/ssl/

# Look for where PySSLSocket is defined in the entire ssl directory
rg -n "struct PySSLSocket" crates/stdlib/src/ssl/ -B 5 -A 50

# Search in compat.rs itself for PySSLSocket struct definition or pyclass
grep -n "PySSLSocket" crates/stdlib/src/ssl/compat.rs | head -20

# Look at the import line and surrounding context in compat.rs
head -50 crates/stdlib/src/ssl/compat.rs

# Search for pyclass definition in compat.rs
rg -n "#\[pyclass\]" crates/stdlib/src/ssl/compat.rs -A 20 | head -150

# Look at the directory structure of the ssl parent
ls -la crates/stdlib/src/

# Search for all Python SSL-related files
find crates/stdlib/src -name "*ssl*" -o -name "*_ssl*"

# Look for PySSLSocket definition more broadly
rg -n "PySSLSocket" crates/stdlib/src/ --type rust -B 5 | grep -A 10 "struct PySSLSocket\|#\[pyclass\].*PySSLSocket" | head -100

# Now let's look at the PySSLSocket struct definition in ssl.rs
sed -n '2302,2370p' crates/stdlib/src/ssl.rs

# Search for write_buffered_len field specifically
rg -n "write_buffered_len" crates/stdlib/src/ssl.rs -B 2 -A 2

# Get more context around the struct definition
sed -n '2300,2380p' crates/stdlib/src/ssl.rs

# Now let's see how the function uses this in context - look at the full function
sed -n '1700,1830p' crates/stdlib/src/ssl/compat.rs

# Search for test cases related to write_buffered_len or SSL_write
rg -n "test.*write\|write.*test" crates/stdlib/src/ssl/ -i | head -20

# Check if there are any tests in the ssl.rs file
rg -n "#\[test\]" crates/stdlib/src/ssl.rs | head -10

# Look for how CPython or OpenSSL handles this scenario
rg -n "bad write retry\|write retry" crates/stdlib/src/ssl/ -B 3 -A 3

# Check how the code currently handles data - is there any copy of the data?
sed -n '1712,1830p' crates/stdlib/src/ssl/compat.rs | grep -A 5 -B 5 "data\|write_all"

# Look for similar patterns in the codebase where data is stored/compared
rg -n "hash.*=.*new\|DefaultHasher\|Hash.*Hasher" crates/stdlib/src/ssl/ | head -10

# Check if DefaultHasher is already used anywhere in the ssl module
rg -n "use std::hash" crates/stdlib/src/ssl.rs

# Let's check the broader context of how write operations are handled
rg -n "fn ssl_write" crates/stdlib/src/ssl/compat.rs -A 5

# Check if there are any benchmarks or tests that would demonstrate the vulnerability
rg -n "SSL_write\|ssl_write" crates/stdlib/src/ssl.rs -B 2 -A 2 | head -50

# Let's verify the actual vulnerability - check how write data flows through rustls
# Look at the comment about "internal buffer write"
sed -n '1745,1760p' crates/stdlib/src/ssl/compat.rs

# Check if rustls::Writer::write_all stores data internally
# Look for any documentation or comments about rustls buffering
rg -n "rustls.*buffer\|buffer.*rustls\|writer.*buffer" crates/stdlib/src/ssl/compat.rs | head -20

# See if there's any example or comment about the retry logic
rg -n "WantWrite\|WantRead" crates/stdlib/src/ssl/compat.rs -B 3 -A 3 | head -80

# Verify the vulnerability is real by understanding rustls buffering
# Look for how rustls Writer works in the broader context
rg -n "conn.writer()" crates/stdlib/src/ssl/compat.rs -B 2 -A 5 | head -40

# Check if there's any comment about the hash approach feasibility
rg -n "hash\|Hash\|Hasher" crates/stdlib/src/ssl.rs | head -20

# Check what imports are already in ssl.rs for hashing
head -100 crates/stdlib/src/ssl.rs | grep -i "use.*hash\|use std"

# Verify the suggested fix would pass cargo clippy by checking similar patterns
rg -n "DefaultHasher\|std::hash" crates/stdlib/src/ | head -10

# Verify that hash-based approach is standard by checking similar uses
rg -n "use std::hash::" crates/ | head -10

# Confirm the suggested fix would work with current types
# Check if PyMutex<Option<u64>> is already used elsewhere
rg -n "PyMutex<Option<" crates/stdlib/src/ssl.rs | head -10

# Review the full context one more time - look at initialization pattern
sed -n '1900,1910p' crates/stdlib/src/ssl.rs

# Verify there are no other places where write_buffered_len is manipulated incorrectly
rg -n "write_buffered_len" crates/stdlib/src/ssl.rs