Developer Reference


Example of Using AES Functions

AES Encryption and Decryption
// use of the CTR mode int AES_sample(void) { // secret key Ipp8u key[] = "\x00\x01\x02\x03\x04\x05\x06\x07" "\x08\x09\x10\x11\x12\x13\x14\x15"; // define and setup AES cipher int ctxSize; ippsAESGetSize(&ctxSize); IppsAESSpec* pAES = (IppsAESSpec*)( new Ipp8u [ctxSize] ); ippsAESInit(key, sizeof(key)-1, pAES, ctxSize); // message to be encrypted Ipp8u msg[] = "the quick brown fox jumps over the lazy dog"; // and initial counter Ipp8u ctr0[] = "\xff\xee\xdd\xcc\xbb\xaa\x99\x88" "\x77\x66\x55\x44\x33\x22\x11\x00"; // counter Ipp8u ctr[16]; // init counter before encryption memcpy(ctr, ctr0, sizeof(ctr)); // encrypted message Ipp8u ctext[sizeof(msg)]; // encryption ippsAESEncryptCTR(msg, ctext, sizeof(msg), pAES, ctr, 64); // init counter before decryption memcpy(ctr, ctr0, sizeof(ctr)); // decrypted message Ipp8u rtext[sizeof(ctext)]; // decryption ippsAESDecryptCTR(ctext, rtext, sizeof(ctext), pAES, ctr, 64); // remove secret and release resource ippsAESInit(0, sizeof(key)-1, pAES, ctxSize); delete [] (Ipp8u*)pAES; int error = memcmp(rtext, msg, sizeof(msg)); return 0==error; }

Product and Performance Information


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