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Asked: 4 months agoIn:
Teacher

I’ve been working on a project that involves using Java security features. I was able to generate a private key and a public key with the keytool and imported them into my keystore. However, when I tried using the private ...Read more

I’ve been working on a project that involves using Java security features. I was able to generate a private key and a public key with the keytool and imported them into my keystore. However, when I tried using the private key to sign a PDF file, I encountered an UnrecoverableKeyException with the message “Cannot recover key.”
I’ve tried using the correct password for the keystore and alias over and over again but the exception still persists. Here’s the relevant code snippet:

KeyStore keyStore = KeyStore.getInstance("JKS");
keyStore.load(new FileInputStream("keystore.jks"), "password".toCharArray());
PrivateKey privateKey = (PrivateKey) keyStore.getKey("alias", "password".toCharArray());
Signature signature = Signature.getInstance("SHA256withRSA");
signature.initSign(privateKey);

I’m not sure what could be causing the issue. Could it be that I’m using the wrong algorithm or that the private key is somehow corrupted? What steps can I take to troubleshoot this UnrecoverableKeyException? Is there a way to regenerate the private key without impacting the rest of my project? Thanks in advance for your help!

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encryptionexceptionjavakey-managementKeystoresecurity
  1. utxpiv_ Begginer

    The error "libpng warning iccp known incorrect sRGB profile" usually occurs when an image has an incorrect profile. To resolve this issue, open the image using a photo editing software and make sure it is saved without any color profile or with a proper sRGB color profile. Sometimes this error is alRead more

    The error “libpng warning iccp known incorrect sRGB profile” usually occurs when an image has an incorrect profile. To resolve this issue, open the image using a photo editing software and make sure it is saved without any color profile or with a proper sRGB color profile.
    Sometimes this error is also generated because the image is missing a profile, so to fix this, you can set the color profile of your image before saving it. This can be done using a photo editing software or command-line tools like ImageMagick.
    In my personal experience, I had encountered this error while working on a web project. I had to make sure that all the images used on my website were optimized and saved with the correct color profile. This helps in reducing the page load time while maintaining the color quality of the images.
    To troubleshoot this error, it is also recommended to check if your code is properly handling the image files and loading them in the correct format. Sometimes, the issue may not be with the image itself but with the way it is being processed and loaded. By following these steps and practices, you can avoid this error and ensure that all the images on your website or application are displayed correctly.

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    • 30
Asked: 2 years agoIn:
Begginer

I’m having an issue with my keystore when trying to run my Android app. I’m using Android Studio and keep getting the error message “Keystore was tampered with, or password was incorrect”. I’m not sure what’s causing this issue and ...Read more

I’m having an issue with my keystore when trying to run my Android app. I’m using Android Studio and keep getting the error message “Keystore was tampered with, or password was incorrect”. I’m not sure what’s causing this issue and how to resolve it.
Here’s the code I’m using to sign my app:
signingConfigs {
release {
storeFile file("mykeystore.keystore")
storePassword "mypassword"
keyAlias "mykeyalias"
keyPassword "mykeypassword"
}
}
I’ve double-checked that the keystore file and passwords are correct. However, I’m still getting the error message. I’ve also tried creating a new keystore with a new password but that didn’t help.
What could be causing this issue? How can I fix it so I can successfully sign my app and deploy it to the Google Play Store? Any help would be greatly appreciated!

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androidjavaKeystorePasswordsecurityTampered
  1. utxpiv_ Begginer

    The error "libpng warning iccp known incorrect sRGB profile" usually occurs when an image has an incorrect profile. To resolve this issue, open the image using a photo editing software and make sure it is saved without any color profile or with a proper sRGB color profile. Sometimes this error is alRead more

    The error “libpng warning iccp known incorrect sRGB profile” usually occurs when an image has an incorrect profile. To resolve this issue, open the image using a photo editing software and make sure it is saved without any color profile or with a proper sRGB color profile.
    Sometimes this error is also generated because the image is missing a profile, so to fix this, you can set the color profile of your image before saving it. This can be done using a photo editing software or command-line tools like ImageMagick.
    In my personal experience, I had encountered this error while working on a web project. I had to make sure that all the images used on my website were optimized and saved with the correct color profile. This helps in reducing the page load time while maintaining the color quality of the images.
    To troubleshoot this error, it is also recommended to check if your code is properly handling the image files and loading them in the correct format. Sometimes, the issue may not be with the image itself but with the way it is being processed and loaded. By following these steps and practices, you can avoid this error and ensure that all the images on your website or application are displayed correctly.

    See less
    • 30
Asked: 4 years agoIn:
Teacher

I have been working on an Oracle database and encountered an error message that says “ORA-65096: invalid common user or role name”. I have checked the user name and role name multiple times, and they both seem valid to me. ...Read more

I have been working on an Oracle database and encountered an error message that says “ORA-65096: invalid common user or role name”. I have checked the user name and role name multiple times, and they both seem valid to me. Can anyone help me identify what could be causing this error?
Here is a code snippet that shows the user and role creation statements that I executed:

CREATE USER my_user IDENTIFIED BY my_password;
GRANT CONNECT, RESOURCE, DBA TO my_user;
CREATE ROLE my_role;
GRANT my_role TO my_user;

I executed these statements in SQL Developer, and they didn’t throw any errors. However, when I try to execute a query using the user, I get the ORA-65096 error message. I have also tried dropping and recreating the user and role, but it hasn’t resolved the issue.
Any insights from the community would be greatly appreciated! I’m relatively new to database management, so please let me know if there’s any additional information that would be helpful.

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databaseerrorinvalid-common-useroraclerole-namesecuritysql
  1. utxpiv_ Begginer

    The error "libpng warning iccp known incorrect sRGB profile" usually occurs when an image has an incorrect profile. To resolve this issue, open the image using a photo editing software and make sure it is saved without any color profile or with a proper sRGB color profile. Sometimes this error is alRead more

    The error “libpng warning iccp known incorrect sRGB profile” usually occurs when an image has an incorrect profile. To resolve this issue, open the image using a photo editing software and make sure it is saved without any color profile or with a proper sRGB color profile.
    Sometimes this error is also generated because the image is missing a profile, so to fix this, you can set the color profile of your image before saving it. This can be done using a photo editing software or command-line tools like ImageMagick.
    In my personal experience, I had encountered this error while working on a web project. I had to make sure that all the images used on my website were optimized and saved with the correct color profile. This helps in reducing the page load time while maintaining the color quality of the images.
    To troubleshoot this error, it is also recommended to check if your code is properly handling the image files and loading them in the correct format. Sometimes, the issue may not be with the image itself but with the way it is being processed and loaded. By following these steps and practices, you can avoid this error and ensure that all the images on your website or application are displayed correctly.

    See less
    • 30