feat(snowflake): add key pair (JWT) authentication#558
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dosco merged 1 commit intodosco:masterfrom Mar 28, 2026
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Snowflake's programmatic API uses JWT-based key pair auth (RSA-2048). This wires up the gosnowflake driver's built-in JWT support via three new config fields: private_key_path, private_key_pem, key_passphrase. When key pair fields are set, the DSN is parsed via gosnowflake.ParseDSN, the PKCS#8 private key is loaded, and a driver.Connector is created with AuthTypeJwt — the same connector pattern MongoDB already uses. Plain DSN passthrough is preserved when no key pair fields are configured. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Snowflake's programmatic API uses JWT-based key pair auth (RSA-2048). This wires up the gosnowflake driver's built-in JWT support via three new config fields: private_key_path, private_key_pem, key_passphrase. When key pair fields are set, the DSN is parsed via gosnowflake.ParseDSN, the PKCS#8 private key is loaded, and a driver.Connector is created with AuthTypeJwt — the same connector pattern MongoDB already uses. Plain DSN passthrough is preserved when no key pair fields are configured. Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
private_key_path,private_key_pem,key_passphrasedriver.Connectorpattern (same as MongoDB) when key pair auth is configured; plain DSN passthrough preserved when notChanges
core/config.goPrivateKeyPath,PrivateKeyPEM,KeyPassphrasefields +SnowflakeKeyPairConfiginterfaceserv/config.goDatabasestructserv/db.goloadSnowflakePrivateKey()helper + rewroteinitSnowflake()with connector pathserv/init.gonewDBFromDatabaseConfig()serv/mcp_config.goserv/db_test.goserv/mcp_test.goCONFIG.mdREADME.md/FEATURES.mdcmd/tmpl/dev.ymlTest plan
TestLoadSnowflakePrivateKey_ValidPKCS8— happy pathTestLoadSnowflakePrivateKey_InvalidPEM— bad PEM rejectedTestLoadSnowflakePrivateKey_NonRSAKey— EC key rejected with clear messageTestLoadSnowflakePrivateKey_PKCS1Rejected— PKCS#1 format rejected (PKCS#8 required)TestInitSnowflake_KeyPairReturnsConnector— returns connector, not connStringTestInitSnowflake_PlainDSNFallback— existing behavior preservedTestInitSnowflake_InvalidKeyPEM— bad inline PEM errorsTestParseDBConfig_SnowflakeKeyPair— MCP config map parsingservtest suite passes🤖 Generated with Claude Code