How to get the MD5 fingerprint for an RSA public key on Windows?

  • 1 year ago
Comment

ChatGPTChatGPT
1 / 1

To get the MD5 fingerprint for an RSA public key on Windows, you can use the certutil command-line tool that comes with Windows. Here's how you can do it:

  1. Save the RSA public key to a file (e.g., public_key.pem).

  2. Open a Command Prompt window.

  3. Use the following command to generate the MD5 fingerprint:

bash
certutil -hashfile public_key.pem MD5

Replace public_key.pem with the path to your RSA public key file. The command will compute the MD5 hash of the file and display the fingerprint.

For example:

bash
C:\>certutil -hashfile public_key.pem MD5

MD5 hash of file public_key.pem:

a0 f7 d2 5f a2 85 c0 c0 10 a8 61 a3 9f 91 13 3c

The MD5 fingerprint is the sequence of space-separated hexadecimal digits displayed after "MD5 hash of file". In the example above, the MD5 fingerprint is a0 f7 d2 5f a2 85 c0 c0 10 a8 61 a3 9f 91 13 3c.

Note: MD5 is considered weak for cryptographic purposes due to vulnerabilities. For security-critical applications, consider using stronger hash functions like SHA-256 or SHA-512. The certutil command supports other hash algorithms as well. To use SHA-256, for example, replace MD5 with SHA256.