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51 lines
1.8 KiB
Diff
51 lines
1.8 KiB
Diff
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From 0138c3c13809250338d7cfba6f4ca3b2da02b2c8 Mon Sep 17 00:00:00 2001
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From: Eneas U de Queiroz <cotequeiroz@gmail.com>
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Date: Thu, 21 Nov 2019 14:28:23 -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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--- a/drivers/crypto/qce/skcipher.c
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+++ b/drivers/crypto/qce/skcipher.c
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@@ -168,7 +168,7 @@ static int qce_skcipher_setkey(struct cr
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return -EINVAL;
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if (IS_AES(flags)) {
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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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@@ -203,13 +203,15 @@ static int qce_skcipher_crypt(struct skc
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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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SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
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skcipher_request_set_tfm(subreq, ctx->fallback);
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@@ -302,8 +304,8 @@ static const struct qce_skcipher_def skc
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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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