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counter is always in Little Endian

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orignal 2019-03-29 18:45:31 -04:00
parent e2071542bf
commit 5b56f4007b
2 changed files with 4 additions and 3 deletions
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5
libi2pd/ChaCha20.cpp
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@ -9,6 +9,7 @@
*
*/
#include "I2PEndian.h"
#include "ChaCha20.h"
#if !OPENSSL_AEAD_CHACHA20_POLY1305
@ -89,14 +90,14 @@ void Chacha20Init (Chacha20State& state, const uint8_t * nonce, const uint8_t *
for (size_t i = 0; i < 8; i++)
state.data[4 + i] = chacha::u8t32le(key + i * 4);
state.data[12] = counter;
state.data[12] = htole32 (counter);
for (size_t i = 0; i < 3; i++)
state.data[13 + i] = chacha::u8t32le(nonce + i * 4);
}
void Chacha20SetCounter (Chacha20State& state, uint32_t counter)
{
state.data[12] = counter;
state.data[12] = htole32 (counter);
state.offset = 0;
}

2
libi2pd/Crypto.cpp
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@ -1236,7 +1236,7 @@ namespace crypto
#if OPENSSL_AEAD_CHACHA20_POLY1305
EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new ();
uint32_t iv[4];
iv[0] = 1; memcpy (iv + 1, nonce, 12); // counter | nonce
iv[0] = htole32 (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);