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Code Issues Releases Activity

use AES-CBC for ECICS

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orignal 2017-11-01 10:20:11 -04:00
parent 12feac1f50
commit 6d01726961
1 changed files with 7 additions and 5 deletions
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12
libi2pd/Crypto.cpp
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@ -389,11 +389,12 @@ namespace crypto
bn2buf (x, encrypted, len);
bn2buf (y, encrypted + len, len);
RAND_bytes (encrypted + 2*len, 256 - 2*len);
// ecryption key
// ecryption key and iv
EC_POINT_mul (curve, p, nullptr, key, k, ctx);
EC_POINT_get_affine_coordinates_GFp (curve, p, x, y, nullptr);
uint8_t keyBuf[64], shared[32];
uint8_t keyBuf[64], iv[64], shared[32];
bn2buf (x, keyBuf, len);
bn2buf (y, iv, len);
SHA256 (keyBuf, len, shared);
// create buffer
uint8_t m[256];
@ -401,9 +402,10 @@ namespace crypto
memcpy (m+33, data, 222);
SHA256 (m+33, 222, m+1);
// encrypt
AES_KEY aesKey;
AES_set_encrypt_key (shared, 256, &aesKey);
AES_encrypt (m, encrypted + 256, &aesKey);
CBCEncryption encryption;
encryption.SetKey (shared);
encryption.SetIV (iv);
encryption.Encrypt (m, 256, encrypted + 256);
EC_POINT_free (p);
BN_CTX_end (ctx);
}