RSA Security Projection Television 5.2.2 Uživatelský manuál stáhnout pdf (Strana 253)

100

101

Chapter 7 Public-Key Operations 231

MultiPrime

Step 5: Final

Step 6: Destroy

When you are done with all objects, remember to destroy them:

Optimal Asymetric Encryption Padding (OAEP)

See the rsaplccs2.c code sample for an example of RSA encryption with OAEP as

defined in PKCS V1.2. See the

Setoaep.c code sample for an example showing RSA

encryption with OAEP as defined in the SET spec.

Raw RSA Encryption and Decryption

When you used AI_PKCS_RSAPublic, you could not encrypt more than k – 11 bytes,

where k was the size of the modulus in bytes. That is because PKCS RSA encryption

pads, and the padding scheme needs 11 spare bytes to work. This is intended for

digital envelopes and digital signatures; in these situations, the number of bytes to

/* generalFlag is for the surrender function.*/

generalFlag = 0;

if ((status = B_DecryptUpdate

(rsaDecryptor, decryptedData, &outputLenUpdate, BLOCK_SIZE,

encryptedData, outputLenTotal, NULL_PTR,

&generalSurrenderContext)) != 0)

break;

unsigned int outputLenFinal;

/* generalFlag is for the surrender function.*/

generalFlag = 0;

if ((status = B_DecryptFinal

(rsaDecryptor, decryptedData + outputLenUpdate,

&outputLenFinal, BLOCK_SIZE - outputLenUpdate, NULL_PTR,

&generalSurrenderContext)) != 0)

break;

B_DestroyAlgorithmObject (&rsaDecryptor);

B_DestroyKeyObject (&privateKey);

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