The following commit has been merged into the perf/urgent branch of tip:
Commit-ID: a745dda98d8a4e9946f2aca751a5b0a3cc71f474 Gitweb: https://git.kernel.org/tip/a745dda98d8a4e9946f2aca751a5b0a3cc71f474 Author: Herbert Xu herbert@gondor.apana.org.au AuthorDate: Fri, 02 Oct 2020 17:55:22 +10:00 Committer: Greg Kroah-Hartman gregkh@linuxfoundation.org CommitterDate: Sat, 17 Oct 2020 08:31:22 +02:00
crypto: bcm - Verify GCM/CCM key length in setkey
commit 10a2f0b311094ffd45463a529a410a51ca025f27 upstream.
The setkey function for GCM/CCM algorithms didn't verify the key length before copying the key and subtracting the salt length.
This patch delays the copying of the key til after the verification has been done. It also adds checks on the key length to ensure that it's at least as long as the salt.
Fixes: 9d12ba86f818 ("crypto: brcm - Add Broadcom SPU driver") Cc: stable@vger.kernel.org Reported-by: kiyin(尹亮) kiyin@tencent.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/crypto/bcm/cipher.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/bcm/cipher.c b/drivers/crypto/bcm/cipher.c index 8a7fa1a..ba25d26 100644 --- a/drivers/crypto/bcm/cipher.c +++ b/drivers/crypto/bcm/cipher.c @@ -2930,7 +2930,6 @@ static int aead_gcm_ccm_setkey(struct crypto_aead *cipher,
ctx->enckeylen = keylen; ctx->authkeylen = 0; - memcpy(ctx->enckey, key, ctx->enckeylen);
switch (ctx->enckeylen) { case AES_KEYSIZE_128: @@ -2946,6 +2945,8 @@ static int aead_gcm_ccm_setkey(struct crypto_aead *cipher, goto badkey; }
+ memcpy(ctx->enckey, key, ctx->enckeylen); + flow_log(" enckeylen:%u authkeylen:%u\n", ctx->enckeylen, ctx->authkeylen); flow_dump(" enc: ", ctx->enckey, ctx->enckeylen); @@ -3000,6 +3001,10 @@ static int aead_gcm_esp_setkey(struct crypto_aead *cipher, struct iproc_ctx_s *ctx = crypto_aead_ctx(cipher);
flow_log("%s\n", __func__); + + if (keylen < GCM_ESP_SALT_SIZE) + return -EINVAL; + ctx->salt_len = GCM_ESP_SALT_SIZE; ctx->salt_offset = GCM_ESP_SALT_OFFSET; memcpy(ctx->salt, key + keylen - GCM_ESP_SALT_SIZE, GCM_ESP_SALT_SIZE); @@ -3028,6 +3033,10 @@ static int rfc4543_gcm_esp_setkey(struct crypto_aead *cipher, struct iproc_ctx_s *ctx = crypto_aead_ctx(cipher);
flow_log("%s\n", __func__); + + if (keylen < GCM_ESP_SALT_SIZE) + return -EINVAL; + ctx->salt_len = GCM_ESP_SALT_SIZE; ctx->salt_offset = GCM_ESP_SALT_OFFSET; memcpy(ctx->salt, key + keylen - GCM_ESP_SALT_SIZE, GCM_ESP_SALT_SIZE); @@ -3057,6 +3066,10 @@ static int aead_ccm_esp_setkey(struct crypto_aead *cipher, struct iproc_ctx_s *ctx = crypto_aead_ctx(cipher);
flow_log("%s\n", __func__); + + if (keylen < CCM_ESP_SALT_SIZE) + return -EINVAL; + ctx->salt_len = CCM_ESP_SALT_SIZE; ctx->salt_offset = CCM_ESP_SALT_OFFSET; memcpy(ctx->salt, key + keylen - CCM_ESP_SALT_SIZE, CCM_ESP_SALT_SIZE);