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[SUNRPC] GSS: Use block ciphers where applicable 

This patch converts SUNRPC/GSS to use the new block cipher type where
applicable.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2006-08-22 20:33:54 +10:00
parent 6b7326c849
commit 378c6697a2
7 changed files with 76 additions and 65 deletions
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19
include/linux/sunrpc/gss_krb5.h
View File

@ -46,8 +46,8 @@ struct krb5_ctx {
unsigned char seed[16];
int signalg;
int sealalg;
struct crypto_tfm *enc;
struct crypto_tfm *seq;
struct crypto_blkcipher *enc;
struct crypto_blkcipher *seq;
s32 endtime;
u32 seq_send;
struct xdr_netobj mech_used;
@ -136,26 +136,27 @@ gss_unwrap_kerberos(struct gss_ctx *ctx_id, int offset,
u32
krb5_encrypt(struct crypto_tfm * key,
krb5_encrypt(struct crypto_blkcipher *key,
void *iv, void *in, void *out, int length);
u32
krb5_decrypt(struct crypto_tfm * key,
krb5_decrypt(struct crypto_blkcipher *key,
void *iv, void *in, void *out, int length);
int
gss_encrypt_xdr_buf(struct crypto_tfm *tfm, struct xdr_buf *outbuf, int offset,
struct page **pages);
gss_encrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *outbuf,
int offset, struct page **pages);
int
gss_decrypt_xdr_buf(struct crypto_tfm *tfm, struct xdr_buf *inbuf, int offset);
gss_decrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *inbuf,
int offset);
s32
krb5_make_seq_num(struct crypto_tfm * key,
krb5_make_seq_num(struct crypto_blkcipher *key,
int direction,
s32 seqnum, unsigned char *cksum, unsigned char *buf);
s32
krb5_get_seq_num(struct crypto_tfm * key,
krb5_get_seq_num(struct crypto_blkcipher *key,
unsigned char *cksum,
unsigned char *buf, int *direction, s32 * seqnum);

4
include/linux/sunrpc/gss_spkm3.h
View File

@ -19,9 +19,9 @@ struct spkm3_ctx {
unsigned int req_flags ;
struct xdr_netobj share_key;
int conf_alg;
struct crypto_tfm* derived_conf_key;
struct crypto_blkcipher *derived_conf_key;
int intg_alg;
struct crypto_tfm* derived_integ_key;
struct crypto_blkcipher *derived_integ_key;
int keyestb_alg; /* alg used to get share_key */
int owf_alg; /* one way function */
};

57
net/sunrpc/auth_gss/gss_krb5_crypto.c
View File

@ -49,7 +49,7 @@
u32
krb5_encrypt(
struct crypto_tfm *tfm,
struct crypto_blkcipher *tfm,
void * iv,
void * in,
void * out,
@ -58,26 +58,27 @@ krb5_encrypt(
u32 ret = -EINVAL;
struct scatterlist sg[1];
u8 local_iv[16] = {0};
struct blkcipher_desc desc = { .tfm = tfm, .info = local_iv };
dprintk("RPC: krb5_encrypt: input data:\n");
print_hexl((u32 *)in, length, 0);
if (length % crypto_tfm_alg_blocksize(tfm) != 0)
if (length % crypto_blkcipher_blocksize(tfm) != 0)
goto out;
if (crypto_tfm_alg_ivsize(tfm) > 16) {
if (crypto_blkcipher_ivsize(tfm) > 16) {
dprintk("RPC: gss_k5encrypt: tfm iv size to large %d\n",
crypto_tfm_alg_ivsize(tfm));
crypto_blkcipher_ivsize(tfm));
goto out;
}
if (iv)
memcpy(local_iv, iv, crypto_tfm_alg_ivsize(tfm));
memcpy(local_iv, iv, crypto_blkcipher_ivsize(tfm));
memcpy(out, in, length);
sg_set_buf(sg, out, length);
ret = crypto_cipher_encrypt_iv(tfm, sg, sg, length, local_iv);
ret = crypto_blkcipher_encrypt_iv(&desc, sg, sg, length);
dprintk("RPC: krb5_encrypt: output data:\n");
print_hexl((u32 *)out, length, 0);
@ -90,7 +91,7 @@ EXPORT_SYMBOL(krb5_encrypt);
u32
krb5_decrypt(
struct crypto_tfm *tfm,
struct crypto_blkcipher *tfm,
void * iv,
void * in,
void * out,
@ -99,25 +100,26 @@ krb5_decrypt(
u32 ret = -EINVAL;
struct scatterlist sg[1];
u8 local_iv[16] = {0};
struct blkcipher_desc desc = { .tfm = tfm, .info = local_iv };
dprintk("RPC: krb5_decrypt: input data:\n");
print_hexl((u32 *)in, length, 0);
if (length % crypto_tfm_alg_blocksize(tfm) != 0)
if (length % crypto_blkcipher_blocksize(tfm) != 0)
goto out;
if (crypto_tfm_alg_ivsize(tfm) > 16) {
if (crypto_blkcipher_ivsize(tfm) > 16) {
dprintk("RPC: gss_k5decrypt: tfm iv size to large %d\n",
crypto_tfm_alg_ivsize(tfm));
crypto_blkcipher_ivsize(tfm));
goto out;
}
if (iv)
memcpy(local_iv,iv, crypto_tfm_alg_ivsize(tfm));
memcpy(local_iv,iv, crypto_blkcipher_ivsize(tfm));
memcpy(out, in, length);
sg_set_buf(sg, out, length);
ret = crypto_cipher_decrypt_iv(tfm, sg, sg, length, local_iv);
ret = crypto_blkcipher_decrypt_iv(&desc, sg, sg, length);
dprintk("RPC: krb5_decrypt: output_data:\n");
print_hexl((u32 *)out, length, 0);
@ -240,7 +242,7 @@ EXPORT_SYMBOL(make_checksum);
struct encryptor_desc {
u8 iv[8]; /* XXX hard-coded blocksize */
struct crypto_tfm *tfm;
struct blkcipher_desc desc;
int pos;
struct xdr_buf *outbuf;
struct page **pages;
@ -285,8 +287,8 @@ encryptor(struct scatterlist *sg, void *data)
if (thislen == 0)
return 0;
ret = crypto_cipher_encrypt_iv(desc->tfm, desc->outfrags, desc->infrags,
thislen, desc->iv);
ret = crypto_blkcipher_encrypt_iv(&desc->desc, desc->outfrags,
desc->infrags, thislen);
if (ret)
return ret;
if (fraglen) {
@ -305,16 +307,18 @@ encryptor(struct scatterlist *sg, void *data)
}
int
gss_encrypt_xdr_buf(struct crypto_tfm *tfm, struct xdr_buf *buf, int offset,
struct page **pages)
gss_encrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *buf,
int offset, struct page **pages)
{
int ret;
struct encryptor_desc desc;
BUG_ON((buf->len - offset) % crypto_tfm_alg_blocksize(tfm) != 0);
BUG_ON((buf->len - offset) % crypto_blkcipher_blocksize(tfm) != 0);
memset(desc.iv, 0, sizeof(desc.iv));
desc.tfm = tfm;
desc.desc.tfm = tfm;
desc.desc.info = desc.iv;
desc.desc.flags = 0;
desc.pos = offset;
desc.outbuf = buf;
desc.pages = pages;
@ -329,7 +333,7 @@ EXPORT_SYMBOL(gss_encrypt_xdr_buf);
struct decryptor_desc {
u8 iv[8]; /* XXX hard-coded blocksize */
struct crypto_tfm *tfm;
struct blkcipher_desc desc;
struct scatterlist frags[4];
int fragno;
int fraglen;
@ -355,8 +359,8 @@ decryptor(struct scatterlist *sg, void *data)
if (thislen == 0)
return 0;
ret = crypto_cipher_decrypt_iv(desc->tfm, desc->frags, desc->frags,
thislen, desc->iv);
ret = crypto_blkcipher_decrypt_iv(&desc->desc, desc->frags,
desc->frags, thislen);
if (ret)
return ret;
if (fraglen) {
@ -373,15 +377,18 @@ decryptor(struct scatterlist *sg, void *data)
}
int
gss_decrypt_xdr_buf(struct crypto_tfm *tfm, struct xdr_buf *buf, int offset)
gss_decrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *buf,
int offset)
{
struct decryptor_desc desc;
/* XXXJBF: */
BUG_ON((buf->len - offset) % crypto_tfm_alg_blocksize(tfm) != 0);
BUG_ON((buf->len - offset) % crypto_blkcipher_blocksize(tfm) != 0);
memset(desc.iv, 0, sizeof(desc.iv));
desc.tfm = tfm;
desc.desc.tfm = tfm;
desc.desc.info = desc.iv;
desc.desc.flags = 0;
desc.fragno = 0;
desc.fraglen = 0;
return process_xdr_buf(buf, offset, buf->len - offset, decryptor, &desc);

24
net/sunrpc/auth_gss/gss_krb5_mech.c
View File

@ -34,6 +34,7 @@
*
*/
#include <linux/err.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
@ -78,10 +79,10 @@ simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res)
}
static inline const void *
get_key(const void *p, const void *end, struct crypto_tfm **res)
get_key(const void *p, const void *end, struct crypto_blkcipher **res)
{
struct xdr_netobj key;
int alg, alg_mode;
int alg;
char *alg_name;
p = simple_get_bytes(p, end, &alg, sizeof(alg));
@ -93,18 +94,19 @@ get_key(const void *p, const void *end, struct crypto_tfm **res)
switch (alg) {
case ENCTYPE_DES_CBC_RAW:
alg_name = "des";
alg_mode = CRYPTO_TFM_MODE_CBC;
alg_name = "cbc(des)";
break;
default:
printk("gss_kerberos_mech: unsupported algorithm %d\n", alg);
goto out_err_free_key;
}
if (!(*res = crypto_alloc_tfm(alg_name, alg_mode))) {
*res = crypto_alloc_blkcipher(alg_name, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(*res)) {
printk("gss_kerberos_mech: unable to initialize crypto algorithm %s\n", alg_name);
*res = NULL;
goto out_err_free_key;
}
if (crypto_cipher_setkey(*res, key.data, key.len)) {
if (crypto_blkcipher_setkey(*res, key.data, key.len)) {
printk("gss_kerberos_mech: error setting key for crypto algorithm %s\n", alg_name);
goto out_err_free_tfm;
}
@ -113,7 +115,7 @@ get_key(const void *p, const void *end, struct crypto_tfm **res)
return p;
out_err_free_tfm:
crypto_free_tfm(*res);
crypto_free_blkcipher(*res);
out_err_free_key:
kfree(key.data);
p = ERR_PTR(-EINVAL);
@ -172,9 +174,9 @@ gss_import_sec_context_kerberos(const void *p,
return 0;
out_err_free_key2:
crypto_free_tfm(ctx->seq);
crypto_free_blkcipher(ctx->seq);
out_err_free_key1:
crypto_free_tfm(ctx->enc);
crypto_free_blkcipher(ctx->enc);
out_err_free_mech:
kfree(ctx->mech_used.data);
out_err_free_ctx:
@ -187,8 +189,8 @@ static void
gss_delete_sec_context_kerberos(void *internal_ctx) {
struct krb5_ctx *kctx = internal_ctx;
crypto_free_tfm(kctx->seq);
crypto_free_tfm(kctx->enc);
crypto_free_blkcipher(kctx->seq);
crypto_free_blkcipher(kctx->enc);
kfree(kctx->mech_used.data);
kfree(kctx);
}

4
net/sunrpc/auth_gss/gss_krb5_seqnum.c
View File

@ -41,7 +41,7 @@
#endif
s32
krb5_make_seq_num(struct crypto_tfm *key,
krb5_make_seq_num(struct crypto_blkcipher *key,
int direction,
s32 seqnum,
unsigned char *cksum, unsigned char *buf)
@ -62,7 +62,7 @@ krb5_make_seq_num(struct crypto_tfm *key,
}
s32
krb5_get_seq_num(struct crypto_tfm *key,
krb5_get_seq_num(struct crypto_blkcipher *key,
unsigned char *cksum,
unsigned char *buf,
int *direction, s32 * seqnum)

4
net/sunrpc/auth_gss/gss_krb5_wrap.c
View File

@ -149,7 +149,7 @@ gss_wrap_kerberos(struct gss_ctx *ctx, int offset,
goto out_err;
}
blocksize = crypto_tfm_alg_blocksize(kctx->enc);
blocksize = crypto_blkcipher_blocksize(kctx->enc);
gss_krb5_add_padding(buf, offset, blocksize);
BUG_ON((buf->len - offset) % blocksize);
plainlen = blocksize + buf->len - offset;
@ -346,7 +346,7 @@ gss_unwrap_kerberos(struct gss_ctx *ctx, int offset, struct xdr_buf *buf)
/* Copy the data back to the right position. XXX: Would probably be
* better to copy and encrypt at the same time. */
blocksize = crypto_tfm_alg_blocksize(kctx->enc);
blocksize = crypto_blkcipher_blocksize(kctx->enc);
data_start = ptr + 22 + blocksize;
orig_start = buf->head[0].iov_base + offset;
data_len = (buf->head[0].iov_base + buf->head[0].iov_len) - data_start;

29
net/sunrpc/auth_gss/gss_spkm3_mech.c
View File

@ -34,6 +34,7 @@
*
*/
#include <linux/err.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
@ -83,10 +84,11 @@ simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res)
}
static inline const void *
get_key(const void *p, const void *end, struct crypto_tfm **res, int *resalg)
get_key(const void *p, const void *end, struct crypto_blkcipher **res,
int *resalg)
{
struct xdr_netobj key = { 0 };
int alg_mode,setkey = 0;
int setkey = 0;
char *alg_name;
p = simple_get_bytes(p, end, resalg, sizeof(*resalg));
@ -98,14 +100,12 @@ get_key(const void *p, const void *end, struct crypto_tfm **res, int *resalg)
switch (*resalg) {
case NID_des_cbc:
alg_name = "des";
alg_mode = CRYPTO_TFM_MODE_CBC;
alg_name = "cbc(des)";
setkey = 1;
break;
case NID_cast5_cbc:
/* XXXX here in name only, not used */
alg_name = "cast5";
alg_mode = CRYPTO_TFM_MODE_CBC;
alg_name = "cbc(cast5)";
setkey = 0; /* XXX will need to set to 1 */
break;
case NID_md5:
@ -113,19 +113,20 @@ get_key(const void *p, const void *end, struct crypto_tfm **res, int *resalg)
dprintk("RPC: SPKM3 get_key: NID_md5 zero Key length\n");
}
alg_name = "md5";
alg_mode = 0;
setkey = 0;
break;
default:
dprintk("gss_spkm3_mech: unsupported algorithm %d\n", *resalg);
goto out_err_free_key;
}
if (!(*res = crypto_alloc_tfm(alg_name, alg_mode))) {
*res = crypto_alloc_blkcipher(alg_name, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(*res)) {
printk("gss_spkm3_mech: unable to initialize crypto algorthm %s\n", alg_name);
*res = NULL;
goto out_err_free_key;
}
if (setkey) {
if (crypto_cipher_setkey(*res, key.data, key.len)) {
if (crypto_blkcipher_setkey(*res, key.data, key.len)) {
printk("gss_spkm3_mech: error setting key for crypto algorthm %s\n", alg_name);
goto out_err_free_tfm;
}
@ -136,7 +137,7 @@ get_key(const void *p, const void *end, struct crypto_tfm **res, int *resalg)
return p;
out_err_free_tfm:
crypto_free_tfm(*res);
crypto_free_blkcipher(*res);
out_err_free_key:
if(key.len > 0)
kfree(key.data);
@ -204,9 +205,9 @@ gss_import_sec_context_spkm3(const void *p, size_t len,
return 0;
out_err_free_key2:
crypto_free_tfm(ctx->derived_integ_key);
crypto_free_blkcipher(ctx->derived_integ_key);
out_err_free_key1:
crypto_free_tfm(ctx->derived_conf_key);
crypto_free_blkcipher(ctx->derived_conf_key);
out_err_free_s_key:
kfree(ctx->share_key.data);
out_err_free_mech:
@ -223,8 +224,8 @@ static void
gss_delete_sec_context_spkm3(void *internal_ctx) {
struct spkm3_ctx *sctx = internal_ctx;
crypto_free_tfm(sctx->derived_integ_key);
crypto_free_tfm(sctx->derived_conf_key);
crypto_free_blkcipher(sctx->derived_integ_key);
crypto_free_blkcipher(sctx->derived_conf_key);
kfree(sctx->share_key.data);
kfree(sctx->mech_used.data);
kfree(sctx);