Parsing Passwords Fails On %

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Introduction

In this article, we will discuss a bug in the migrate tool, specifically in the parsing of passwords that contain the % character. This bug is related to the issue reported in the GitHub repository of the migrate tool, where the password is shown in the error message. We will go through the steps to reproduce the bug, the expected behavior, and the migrate version that is affected by this issue.

Describe the Bug

The bug is related to the parsing of passwords that contain the % character. When a password with % is used to connect to a database, the migrate tool fails to parse the password correctly, resulting in an error message that shows the password in plain text.

Steps to Reproduce

To reproduce this bug, follow these steps:

  1. Connect to a database with a password containing %.
  2. Use the following command to create a new migration:
migrate create -ext sql -dir db/migrations -seq
  1. In the migrate command, specify the database URL with the password containing %.
  2. Run the migrate command to create a new migration.

Example

Here is an example of the error message that is displayed when the password contains %:

failed to create new migrations: failed to open database: parse "pgx://postgres:foo%!h(bool=true)ejsan2%!t(MISSING)jotjo@localhost:5432/postgres?sslmode=disable&application_name=&statement_cache_mode=describe&x-lock-strategy=table&x-multi-statement=%!t(MISSING)": invalid URL escape "%!h"

The password used in this example is foo%hejsan2%tjotjo.

Expected Behavior

The expected behavior is that the migrate tool should parse the password correctly, even if it contains the % character. The password should not be shown in the error message.

Migrate Version

The migrate version that is affected by this issue is v4.18.2.

Causes of the Bug

The bug is caused by the way the migrate tool parses the password in the database URL. The tool uses the url.Parse function to parse the database URL, which does not handle the % character correctly. As a result, the password is not parsed correctly, and the error message shows the password in plain text.

Solution

To fix this bug, the migrate tool needs to be updated to handle the % character correctly when parsing the password in the database URL. This can be done by using a custom function to parse the password, or by using a library that can handle URL escapes correctly.

Workaround

Until the migrate tool is updated to fix this bug, a workaround is to use a different character instead of % in the password. For example, you can use ! or @ instead of %.

Conclusion

In conclusion, the bug in the migrate tool that causes parsing passwords to fail on % is a significant issue that needs to be addressed. The bug is caused by the way the tool parses the password in the database URL, and it can be fixed by updating the tool to handle the % character correctly. Until then, a workaround is to use a different character instead of % in the password.

Future Development

The migrate tool is an essential tool for database migrations, and it needs to be updated regularly to fix bugs and add new features. In the future, the tool should be updated to handle the % character correctly when parsing the password in the database URL. This will ensure that the tool works correctly and securely, even when passwords contain special characters.

Recommendations

Based on the analysis of this bug, the following recommendations can be made:

  • Update the migrate tool to handle the % character correctly when parsing the password in the database URL.
  • Use a custom function to parse the password, or use a library that can handle URL escapes correctly.
  • Use a different character instead of % in the password as a workaround until the tool is updated.

Related Issues

This bug is related to the issue reported in the GitHub repository of the migrate tool, where the password is shown in the error message. The issue is tracked in the following GitHub issue:

References

Introduction

In our previous article, we discussed a bug in the migrate tool that causes parsing passwords to fail on %. In this article, we will provide a Q&A section to answer some common questions related to this issue.

Q: What is the cause of the bug?

A: The bug is caused by the way the migrate tool parses the password in the database URL. The tool uses the url.Parse function to parse the database URL, which does not handle the % character correctly. As a result, the password is not parsed correctly, and the error message shows the password in plain text.

Q: How can I reproduce the bug?

A: To reproduce the bug, follow these steps:

  1. Connect to a database with a password containing %.
  2. Use the following command to create a new migration:
migrate create -ext sql -dir db/migrations -seq
  1. In the migrate command, specify the database URL with the password containing %.
  2. Run the migrate command to create a new migration.

Q: What is the expected behavior?

A: The expected behavior is that the migrate tool should parse the password correctly, even if it contains the % character. The password should not be shown in the error message.

Q: How can I fix the bug?

A: To fix the bug, the migrate tool needs to be updated to handle the % character correctly when parsing the password in the database URL. This can be done by using a custom function to parse the password, or by using a library that can handle URL escapes correctly.

Q: What is the workaround for this bug?

A: Until the migrate tool is updated to fix this bug, a workaround is to use a different character instead of % in the password. For example, you can use ! or @ instead of %.

Q: Is this bug specific to the migrate tool?

A: No, this bug is not specific to the migrate tool. It can occur in any tool that uses the url.Parse function to parse the database URL.

Q: How can I prevent this bug from occurring in the future?

A: To prevent this bug from occurring in the future, you can use a custom function to parse the password, or use a library that can handle URL escapes correctly.

Q: What are the implications of this bug?

A: The implications of this bug are that the password is shown in the error message, which can be a security risk. Additionally, the bug can cause the migrate tool to fail to create new migrations.

Q: How can I report this bug?

A: You can report this bug by creating a new issue in the GitHub repository of the migrate tool.

Q: What is the status of the bug fix?

A: The status of the bug fix is that it is being tracked in the GitHub issue #1242. The fix is expected to be released in a future version of the migrate tool.

Q: How can I stay up-to-date with the latest information on this bug?

A: You can stay up-to-date with the latest information on this bug by following the GitHub issue #1242 and the migrate tool's GitHub repository.