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-rw-r--r--crypto/evp/e_aes.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/crypto/evp/e_aes.c b/crypto/evp/e_aes.c
index 55cc4423a7..0dfd1c7dd8 100644
--- a/crypto/evp/e_aes.c
+++ b/crypto/evp/e_aes.c
@@ -2216,9 +2216,6 @@ static int s390x_aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
if (!cctx->aes.ccm.iv_set)
return -1;
- if (!enc && !cctx->aes.ccm.tag_set)
- return -1;
-
if (out == NULL) {
/* Update(): Pass message length. */
if (in == NULL) {
@@ -2237,6 +2234,10 @@ static int s390x_aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
return len;
}
+ /* The tag must be set before actually decrypting data */
+ if (!enc && !cctx->aes.ccm.tag_set)
+ return -1;
+
/* Update(): Process message. */
if (!cctx->aes.ccm.len_set) {