Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Here's the code (just in case someone has googled this topic out):</p> <pre><code>BYTE *spkiData = SPKI; // X.509 ASN.1 encoded SubjectPublicKeyInfo DWORD dwSPKISize = SPKI_SIZE; // 94 bytes for RSA DWORD dwBufSize = 0; // Get buffer size for decoded spki structure CryptDecodeObject(X509_ASN_ENCODING, X509_PUBLIC_KEY_INFO, spkiData, dwSPKISize, 0, NULL, &amp;dwBufSize); BYTE* decBuf = new BYTE[dwBufSize]; CryptDecodeObject( X509_ASN_ENCODING, X509_PUBLIC_KEY_INFO, spkiData, dwSPKISize, 0, decBuf, &amp;dwBufSize); // Now decode the RSA Public key itself CERT_PUBLIC_KEY_INFO * spki = (CERT_PUBLIC_KEY_INFO *) decBuf; // Get buffer size for decoded public key structure CryptDecodeObject( X509_ASN_ENCODING, RSA_CSP_PUBLICKEYBLOB, spki-&gt;PublicKey.pbData, spki-&gt;PublicKey.cbData, 0, 0, &amp;dwBufSize); // Get the RSA public key blob BYTE *blobBuf = new BYTE[dwBufSize]; CryptDecodeObject(X509_ASN_ENCODING, RSA_CSP_PUBLICKEYBLOB, spki-&gt;PublicKey.pbData, spki-&gt;PublicKey.cbData, 0, blobBuf, &amp;dwBufSize); // Acquire crypto provider context HCRYPTPROV hCryptProv = NULL; CryptAcquireContext(&amp;hCryptProv, 0, MS_ENHANCED_PROV, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT); // Import key HCRYPTKEY key = NULL; CryptImportKey(hCryptProv, blobBuf, dwBufSize, 0, 0, &amp;key); // Get the key size DWORD dwKeySize; DWORD dwParamSize = sizeof(DWORD); CryptGetKeyParam(key, KP_KEYLEN, (BYTE*) &amp;dwKeySize, &amp;dwParamSize, 0); // we need it in bytes for convenience dwKeySize /= 8; // Now the fun // allocate a buffer of key size BYTE *data = new BYTE[dwKeySize]; // Copy data need to be encrypted // With PKCS#1 padding data length can not exceed keysize - 11 bytes DWORD dataLen = 16; memcpy(data, "0123456789012345", dataLen); CryptEncrypt(key, 0, TRUE, 0, data, &amp;dataLen, dwKeySize) // now convert it to big endian (for the rest of the world) for (int i = 0; i &lt; (dwKeySize / 2); i++) { BYTE c = data[i]; data[i] = data[dwKeySize - 1 - i]; data[dwKeySize - 1 - i] = c; } // now data points to a dwKeySize length block of RSA PKCS#v1.5 encrypted data </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POHow to encrypt small data block with only RSA public key using Microsoft ECSP?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USAlexey Naidyonov
    1. USAlexey Naidyonov
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

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