e_aes_cbc_hmac_sha1.c: fix rare bad record mac on AES-NI plaforms.

PR: 3002
(cherry picked from commit 5c60046553716fcf160718f59160493194f212dc)

diff --git a/crypto/evp/e_aes_cbc_hmac_sha1.c b/crypto/evp/e_aes_cbc_hmac_sha1.c
index 483e04b605b79aab6c521dcaa93500e4a39a67b4..fb2c884a7860178c49ca71b01c1c7f74fde11607 100644 (file)
--- a/crypto/evp/e_aes_cbc_hmac_sha1.c
+++ b/crypto/evp/e_aes_cbc_hmac_sha1.c
@@ -328,10 +328,11 @@ static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 
                                if (res!=SHA_CBLOCK) continue;
 
-                               mask = 0-((inp_len+8-j)>>(sizeof(j)*8-1));
+                               /* j is not incremented yet */
+                               mask = 0-((inp_len+7-j)>>(sizeof(j)*8-1));
                                data->u[SHA_LBLOCK-1] |= bitlen&mask;
                                sha1_block_data_order(&key->md,data,1);
-                               mask &= 0-((j-inp_len-73)>>(sizeof(j)*8-1));
+                               mask &= 0-((j-inp_len-72)>>(sizeof(j)*8-1));
                                pmac->u[0] |= key->md.h0 & mask;
                                pmac->u[1] |= key->md.h1 & mask;
                                pmac->u[2] |= key->md.h2 & mask;