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61 lines
2.3 KiB
Diff
61 lines
2.3 KiB
Diff
From 24e91ebb48e8a9d0475940cb47dfd228cdf3336e Mon Sep 17 00:00:00 2001
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From: Eneas U de Queiroz <cotequeiroz@gmail.com>
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Date: Fri, 20 Dec 2019 16:02:14 -0300
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Subject: [PATCH] crypto: qce - fix xts-aes-qce key sizes
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XTS-mode uses two keys, so the keysizes should be doubled in
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skcipher_def, and halved when checking if it is AES-128/192/256.
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Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
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Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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(cherry picked from commit 7de4c2bd196f111e39cc60f6197654aff23ba2b4)
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diff --git a/drivers/crypto/qce/skcipher.c b/drivers/crypto/qce/skcipher.c
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index 1f1f40a761fa..e4f6d87ba51d 100644
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--- a/drivers/crypto/qce/skcipher.c
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+++ b/drivers/crypto/qce/skcipher.c
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@@ -154,12 +154,13 @@ static int qce_skcipher_setkey(struct crypto_skcipher *ablk, const u8 *key,
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{
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struct crypto_tfm *tfm = crypto_skcipher_tfm(ablk);
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struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
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+ unsigned long flags = to_cipher_tmpl(ablk)->alg_flags;
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int ret;
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if (!key || !keylen)
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return -EINVAL;
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- switch (keylen) {
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+ switch (IS_XTS(flags) ? keylen >> 1 : keylen) {
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case AES_KEYSIZE_128:
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case AES_KEYSIZE_256:
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break;
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@@ -213,13 +214,15 @@ static int qce_skcipher_crypt(struct skcipher_request *req, int encrypt)
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struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct qce_cipher_reqctx *rctx = skcipher_request_ctx(req);
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struct qce_alg_template *tmpl = to_cipher_tmpl(tfm);
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+ int keylen;
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int ret;
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rctx->flags = tmpl->alg_flags;
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rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT;
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+ keylen = IS_XTS(rctx->flags) ? ctx->enc_keylen >> 1 : ctx->enc_keylen;
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- if (IS_AES(rctx->flags) && ctx->enc_keylen != AES_KEYSIZE_128 &&
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- ctx->enc_keylen != AES_KEYSIZE_256) {
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+ if (IS_AES(rctx->flags) && keylen != AES_KEYSIZE_128 &&
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+ keylen != AES_KEYSIZE_256) {
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SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
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skcipher_request_set_sync_tfm(subreq, ctx->fallback);
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@@ -311,8 +314,8 @@ static const struct qce_skcipher_def skcipher_def[] = {
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.drv_name = "xts-aes-qce",
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.blocksize = AES_BLOCK_SIZE,
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.ivsize = AES_BLOCK_SIZE,
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- .min_keysize = AES_MIN_KEY_SIZE,
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- .max_keysize = AES_MAX_KEY_SIZE,
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+ .min_keysize = AES_MIN_KEY_SIZE * 2,
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+ .max_keysize = AES_MAX_KEY_SIZE * 2,
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},
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{
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.flags = QCE_ALG_DES | QCE_MODE_ECB,
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