Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Based on <a href="https://stackoverflow.com/questions/4503543/c-rsacryptoserviceprovider-decrypt-into-a-securestring-instead-of-byte-array/4503620#4503620">Coding Gorilla's answer</a>, I tried the following in my <code>Decrypt</code> method:</p> <pre><code>string decryptedString1 = string.Empty; foreach (byte b in decryptedBytes) { decryptedString1 += (char)b; } string decryptedString2 = ByteConverter.GetString(decryptedBytes); </code></pre> <p>When debugging, <code>decryptedString1</code> and <code>decryptedString2</code> were not equal:</p> <pre><code>decryptedString1 "m\0y\0V\0e\0r\0y\0L\0o\0n\0g\0V\03\0r\0y\05\03\0c\0r\03\07\0p\04\0s\0s\0w\00\0r\0d\0!\0!\0!\0" decryptedString2 "myVeryLongV3ry53cr37p4ssw0rd!!!" </code></pre> <p>So it looks like I can just go through the <code>byte[]</code> array, do a direct cast to <code>char</code>, and skip <code>\0</code> characters. Like Coding Gorilla said, though, this does seem to again in part defeat the point of <code>SecureString</code>, because the sensitive data is floating about in memory in little <code>byte</code>-size chunks. Any suggestions for getting <code>RSACryptoServiceProvider.Decrypt</code> to return a <code>SecureString</code> directly?</p> <p><strong>Edit:</strong> yep, this works:</p> <pre><code>var secStr = new SecureString(); foreach (byte b in decryptedBytes) { var c = (char)b; if ('\0' == c) { continue; } secStr.AppendChar(c); } return secStr; </code></pre> <p><strong>Edit:</strong> correction: this works with plain old English strings. Encrypting and then attempting to decrypt the string <code>"標準語 明治維新 english やった"</code> doesn't work as expected because the resulting decrypted string, using this <code>foreach (byte b in decryptedBytes)</code> technique, does not match the original unencrypted string.</p> <p><strong>Edit:</strong> using the following works for both:</p> <pre><code>var secStr = new SecureString(); foreach (char c in ByteConverter.GetChars(decryptedBytes)) { secStr.AppendChar(c); } return secStr; </code></pre> <p>This still leaves a byte array and a char array of the password in memory, which sucks. Maybe I should find another RSA class that returns a <code>SecureString</code>. :/</p>
    singulars
    1. This table or related slice is empty.
    1. POC# - RSACryptoServiceProvider Decrypt into a SecureString instead of byte array
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USCommunity
    1. USSarah Vessels
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POC# - RSACryptoServiceProvider Decrypt into a SecureString instead of byte array
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COIf you come up with a way to skip the 'insecure' intermediate step, I'd love to hear it. =)
      singulars
      1. PO
      1. USCodingGorilla
    2. COBTW, if, before encrypting your string, you use the ASCIIEncoder on the string, it will get rid of your `\0`'s. Those are an artifact of Unicode and MBCS (that is of course assuming you don't need Unicode/MBCS support).
      singulars
      1. PO
      1. USCodingGorilla
    3. COWrite a new `RSACryptoServiceProvider`-type class whose `Decrypt` and `Encrypt` return/use `SecureString` instead of byte arrays? :P
      singulars
      1. PO
      1. USSarah Vessels
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload