oysteikt/heimdal
0
0
Fork 0
Code Issues 5 Pull Requests Releases Activity

krb5: Use iovecs for internal checksum handling

Browse Source 
Modify the signature of the checksum operation in the
krb5_checksum_type structure so that it processes iovecs rather than
solid blocks of data.

Update all of the implementations of these functions for all of the
checksum types that we support so that they process iovecs, either
by iterating through the iovec in each function, or by calling
_krb5_evp_digest_iov or _krb5_evp_hmac_iov()

Update callers of these functions so that they turn their single blocks
of data into a single iovec of the correct type before calling checksum
This commit is contained in:
Simon Wilkinson
2018-05-14 13:56:21 +01:00
committed by Jeffrey Altman
parent 3484f092e5
commit ca756f0f7f
10 changed files with 139 additions and 60 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
lib/krb5/crypto-arcfour.c
View File

@@ -58,9 +58,9 @@ static struct _krb5_key_type keytype_arcfour = {
krb5_error_code
_krb5_HMAC_MD5_checksum(krb5_context context,
struct _krb5_key_data *key,
const void *data,
size_t len,
unsigned usage,
const struct krb5_crypto_iov *iov,
int niov,
Checksum *result)
{
EVP_MD_CTX *m;
@@ -73,6 +73,7 @@ _krb5_HMAC_MD5_checksum(krb5_context context,
unsigned char tmp[16];
unsigned char ksign_c_data[16];
krb5_error_code ret;
int i;
m = EVP_MD_CTX_create();
if (m == NULL)
@@ -93,7 +94,10 @@ _krb5_HMAC_MD5_checksum(krb5_context context,
t[2] = (usage >> 16) & 0xFF;
t[3] = (usage >> 24) & 0xFF;
EVP_DigestUpdate(m, t, 4);
EVP_DigestUpdate(m, data, len);
for (i = 0; i < niov; i++) {
if (_krb5_crypto_iov_should_sign(&iov[i]))
EVP_DigestUpdate(m, iov[i].data.data, iov[i].data.length);
}
EVP_DigestFinal_ex (m, tmp, NULL);
EVP_MD_CTX_destroy(m);