3d234b3313
'shash' algorithms are always synchronous, so passing CRYPTO_ALG_ASYNC in the mask to crypto_alloc_shash() has no effect. Many users therefore already don't pass it, but some still do. This inconsistency can cause confusion, especially since the way the 'mask' argument works is somewhat counterintuitive. Thus, just remove the unneeded CRYPTO_ALG_ASYNC flags. This patch shouldn't change any actual behavior. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/* Orinoco MIC helpers
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*
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* See copyright notice in main.c
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*/
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/if_ether.h>
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#include <linux/scatterlist.h>
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#include <crypto/hash.h>
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#include "orinoco.h"
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#include "mic.h"
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/********************************************************************/
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/* Michael MIC crypto setup */
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/********************************************************************/
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int orinoco_mic_init(struct orinoco_private *priv)
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{
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priv->tx_tfm_mic = crypto_alloc_shash("michael_mic", 0, 0);
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if (IS_ERR(priv->tx_tfm_mic)) {
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printk(KERN_DEBUG "orinoco_mic_init: could not allocate "
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"crypto API michael_mic\n");
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priv->tx_tfm_mic = NULL;
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return -ENOMEM;
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}
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priv->rx_tfm_mic = crypto_alloc_shash("michael_mic", 0, 0);
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if (IS_ERR(priv->rx_tfm_mic)) {
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printk(KERN_DEBUG "orinoco_mic_init: could not allocate "
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"crypto API michael_mic\n");
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priv->rx_tfm_mic = NULL;
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return -ENOMEM;
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}
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return 0;
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}
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void orinoco_mic_free(struct orinoco_private *priv)
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{
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if (priv->tx_tfm_mic)
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crypto_free_shash(priv->tx_tfm_mic);
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if (priv->rx_tfm_mic)
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crypto_free_shash(priv->rx_tfm_mic);
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}
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int orinoco_mic(struct crypto_shash *tfm_michael, u8 *key,
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u8 *da, u8 *sa, u8 priority,
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u8 *data, size_t data_len, u8 *mic)
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{
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SHASH_DESC_ON_STACK(desc, tfm_michael);
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u8 hdr[ETH_HLEN + 2]; /* size of header + padding */
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int err;
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if (tfm_michael == NULL) {
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printk(KERN_WARNING "orinoco_mic: tfm_michael == NULL\n");
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return -1;
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}
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/* Copy header into buffer. We need the padding on the end zeroed */
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memcpy(&hdr[0], da, ETH_ALEN);
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memcpy(&hdr[ETH_ALEN], sa, ETH_ALEN);
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hdr[ETH_ALEN * 2] = priority;
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hdr[ETH_ALEN * 2 + 1] = 0;
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hdr[ETH_ALEN * 2 + 2] = 0;
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hdr[ETH_ALEN * 2 + 3] = 0;
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desc->tfm = tfm_michael;
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desc->flags = 0;
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err = crypto_shash_setkey(tfm_michael, key, MIC_KEYLEN);
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if (err)
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return err;
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err = crypto_shash_init(desc);
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if (err)
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return err;
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err = crypto_shash_update(desc, hdr, sizeof(hdr));
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if (err)
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return err;
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err = crypto_shash_update(desc, data, data_len);
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if (err)
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return err;
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err = crypto_shash_final(desc, mic);
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shash_desc_zero(desc);
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return err;
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}
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