Return-Path: From: Lukasz Rymanowski To: linux-bluetooth@vger.kernel.org Cc: szymon.janc@tieto.com, Lukasz Rymanowski Subject: [PATCH 6/9] shared/crypto: Change swap128 to swap_buf Date: Wed, 28 May 2014 16:44:38 +0200 Message-Id: <1401288283-13480-11-git-send-email-lukasz.rymanowski@tieto.com> In-Reply-To: <1401288283-13480-1-git-send-email-lukasz.rymanowski@tieto.com> References: <1401288283-13480-1-git-send-email-lukasz.rymanowski@tieto.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: We will need to swap bigger buffers so lets make swap128 more generic for that purpose --- src/shared/crypto.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/src/shared/crypto.c b/src/shared/crypto.c index d4c4cc7..ad89174 100644 --- a/src/shared/crypto.c +++ b/src/shared/crypto.c @@ -248,12 +248,12 @@ static bool alg_encrypt(int fd, const void *inbuf, size_t inlen, return true; } -static inline void swap128(const uint8_t src[16], uint8_t dst[16]) +static inline void swap_buf(const uint8_t *src, uint8_t *dst, uint16_t len) { int i; - for (i = 0; i < 16; i++) - dst[15 - i] = src[i]; + for (i = 0; i < len; i++) + dst[len - 1 - i] = src[i]; } bool bt_crypto_sign_att(struct bt_crypto *crypto, const uint8_t key[16], @@ -276,7 +276,7 @@ bool bt_crypto_sign_att(struct bt_crypto *crypto, const uint8_t key[16], put_le32(sign_cnt, msg + m_len); /* The most significant octet of key corresponds to key[0] */ - swap128(key, tmp); + swap_buf(key, tmp, 16); memcpy(signature, tmp + 4, 12); fd = alg_new(crypto->cmac_aes, tmp, 16); @@ -308,7 +308,7 @@ bool bt_crypto_sign_att(struct bt_crypto *crypto, const uint8_t key[16], * Then truncate in most significant bit first order to a length of * 12 octets */ - swap128(out, tmp); + swap_buf(out, tmp, 16); memcpy(signature, tmp + 4, 12); return true; @@ -336,7 +336,7 @@ bool bt_crypto_e(struct bt_crypto *crypto, const uint8_t key[16], return false; /* The most significant octet of key corresponds to key[0] */ - swap128(key, tmp); + swap_buf(key, tmp, 16); fd = alg_new(crypto->ecb_aes, tmp, 16); if (fd < 0) @@ -344,7 +344,7 @@ bool bt_crypto_e(struct bt_crypto *crypto, const uint8_t key[16], /* Most significant octet of plaintextData corresponds to in[0] */ - swap128(plaintext, in); + swap_buf(plaintext, in, 16); if (!alg_encrypt(fd, in, 16, out, 16)) { close(fd); @@ -352,7 +352,7 @@ bool bt_crypto_e(struct bt_crypto *crypto, const uint8_t key[16], } /* Most significant octet of encryptedData corresponds to out[0] */ - swap128(out, encrypted); + swap_buf(out, encrypted, 16); close(fd); -- 1.8.4