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FEAT: Adding support for Device Code #133

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FEAT: Adding support for Device Code #133

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24 changes: 24 additions & 0 deletions mssql_python/helpers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -104,6 +104,7 @@ def add_driver_name_to_app_parameter(connection_string):
app_found = False
modified_parameters = []
has_aad_interactive = False
has_aad_device_code = False

# Iterate through the key-value pairs
for param in parameters:
Expand All @@ -120,6 +121,8 @@ def add_driver_name_to_app_parameter(connection_string):
if platform.system().lower() != "windows":
modified_parameters.append(param)
continue
if auth_value.lower() == "activedirectorydevicecode":
has_aad_device_code = True

if param.lower().startswith("app="):
app_found = True
Expand All @@ -131,6 +134,27 @@ def add_driver_name_to_app_parameter(connection_string):
# If APP key is not found, append it
if not app_found:
modified_parameters.append("APP=MSSQL-Python")

if has_aad_device_code:

# Remove Uid, Pwd, Connection Timeout, Encrypt, TrustServerCertificate
modified_parameters = [
param for param in modified_parameters
if not any(key in param.lower() for key in ["uid=", "pwd=", "connection timeout=", "encrypt=", "trustservercertificate=", "authentication="])
]
modified_parameters.append("Connection Timeout=180") # Add default connection timeout
# Handle AAD Device Code auth
try:
from azure.identity import DeviceCodeCredential
import struct
except ImportError:
raise ImportError("Please install azure-identity: pip install azure-identity")

credential = DeviceCodeCredential()
token_bytes = credential.get_token("https://database.windows.net/.default").token.encode("UTF-16-LE")
token_struct = struct.pack(f"<I{len(token_bytes)}s", len(token_bytes), token_bytes)
conn_str = ";".join(modified_parameters) + ";", {1256: token_struct}
return conn_str

# Handle AAD Interactive auth for non-Windows platforms
if has_aad_interactive and platform.system().lower() != "windows":
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