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trivernis 5 years ago
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README.md
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@ -23,17 +23,20 @@ image data. The steps for encrypting are:
### Encrypt ### Encrypt
1. Parse the png file and split it into chunks. 1. Parse the png file and split it into chunks.
2. Prompt for a password and use the sha512 32byte value. 2. Prompt for a password and use the sha512 32byte value with a generated salt.
3. Create a base64 string out of the data. 3. Store the salt in the `saLt` chunk.
4. Encrypt the base64 string using aes and the provided hashed key. 4. Create a base64 string out of the data.
5. Store the data into the `crPt` chunk. 5. Encrypt the base64 string using aes and the provided hashed key.
6. Write the png header and chunks to the output file. 6. Split the data into parts of 1 MiB of size.
7. Store every data part into a separate `crPt` chunk.
8. Write the png header and chunks to the output file.
### Decrypt ### Decrypt
1. Parse the png file and split it into chunks. 1. Parse the png file and split it into chunks.
2. Get the `crPt` chunk. 2. Get the `saLt` chunk.
3. Prompt for the password and create the sha512 32byte hash. 3. Get the `crPt` chunks and and concat the data.
4. Decrypt the data using aes and the provided hash key. 4. Prompt for the password and create the sha512 32byte hash with the salt.
5. Decode the base64 data. 5. Decrypt the data using aes and the provided hash key.
6. Write the data to the specified output file. 6. Decode the base64 data.
7. Write the data to the specified output file.
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