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use 16 bytes iv for chacha20

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orignal 2019-03-29 16:18:51 -04:00
parent cdb217b774
commit e2071542bf
1 changed files with 3 additions and 1 deletions
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4
libi2pd/Crypto.cpp
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@ -1235,7 +1235,9 @@ namespace crypto
{
#if OPENSSL_AEAD_CHACHA20_POLY1305
EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new ();
EVP_EncryptInit_ex(ctx, EVP_chacha20 (), 0, key, nonce);
uint32_t iv[4];
iv[0] = 1; memcpy (iv + 1, nonce, 12); // counter | nonce
EVP_EncryptInit_ex(ctx, EVP_chacha20 (), NULL, key, (const uint8_t *)iv);
int outlen = 0;
EVP_EncryptUpdate(ctx, out, &outlen, msg, msgLen);
EVP_EncryptFinal_ex(ctx, NULL, &outlen);