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xfrm: esp: add extack to esp_init_state, esp6_init_state

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Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Sabrina Dubroca 2022-09-27 17:45:31 +02:00 committed by Steffen Klassert
parent ef87a4f84b
commit 67c44f93c9
2 changed files with 64 additions and 42 deletions
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53
net/ipv4/esp4.c
View File

@ -1007,16 +1007,17 @@ static void esp_destroy(struct xfrm_state *x)
crypto_free_aead(aead);
}
static int esp_init_aead(struct xfrm_state *x)
static int esp_init_aead(struct xfrm_state *x, struct netlink_ext_ack *extack)
{
char aead_name[CRYPTO_MAX_ALG_NAME];
struct crypto_aead *aead;
int err;
err = -ENAMETOOLONG;
if (snprintf(aead_name, CRYPTO_MAX_ALG_NAME, "%s(%s)",
x->geniv, x->aead->alg_name) >= CRYPTO_MAX_ALG_NAME)
goto error;
x->geniv, x->aead->alg_name) >= CRYPTO_MAX_ALG_NAME) {
NL_SET_ERR_MSG(extack, "Algorithm name is too long");
return -ENAMETOOLONG;
}
aead = crypto_alloc_aead(aead_name, 0, 0);
err = PTR_ERR(aead);
@ -1034,11 +1035,15 @@ static int esp_init_aead(struct xfrm_state *x)
if (err)
goto error;
return 0;
error:
NL_SET_ERR_MSG(extack, "Kernel was unable to initialize cryptographic operations");
return err;
}
static int esp_init_authenc(struct xfrm_state *x)
static int esp_init_authenc(struct xfrm_state *x,
struct netlink_ext_ack *extack)
{
struct crypto_aead *aead;
struct crypto_authenc_key_param *param;
@ -1049,10 +1054,6 @@ static int esp_init_authenc(struct xfrm_state *x)
unsigned int keylen;
int err;
err = -EINVAL;
if (!x->ealg)
goto error;
err = -ENAMETOOLONG;
if ((x->props.flags & XFRM_STATE_ESN)) {
@ -1061,22 +1062,28 @@ static int esp_init_authenc(struct xfrm_state *x)
x->geniv ?: "", x->geniv ? "(" : "",
x->aalg ? x->aalg->alg_name : "digest_null",
x->ealg->alg_name,
x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME)
x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME) {
NL_SET_ERR_MSG(extack, "Algorithm name is too long");
goto error;
}
} else {
if (snprintf(authenc_name, CRYPTO_MAX_ALG_NAME,
"%s%sauthenc(%s,%s)%s",
x->geniv ?: "", x->geniv ? "(" : "",
x->aalg ? x->aalg->alg_name : "digest_null",
x->ealg->alg_name,
x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME)
x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME) {
NL_SET_ERR_MSG(extack, "Algorithm name is too long");
goto error;
}
}
aead = crypto_alloc_aead(authenc_name, 0, 0);
err = PTR_ERR(aead);
if (IS_ERR(aead))
if (IS_ERR(aead)) {
NL_SET_ERR_MSG(extack, "Kernel was unable to initialize cryptographic operations");
goto error;
}
x->data = aead;
@ -1106,17 +1113,16 @@ static int esp_init_authenc(struct xfrm_state *x)
err = -EINVAL;
if (aalg_desc->uinfo.auth.icv_fullbits / 8 !=
crypto_aead_authsize(aead)) {
pr_info("ESP: %s digestsize %u != %u\n",
x->aalg->alg_name,
crypto_aead_authsize(aead),
aalg_desc->uinfo.auth.icv_fullbits / 8);
NL_SET_ERR_MSG(extack, "Kernel was unable to initialize cryptographic operations");
goto free_key;
}
err = crypto_aead_setauthsize(
aead, x->aalg->alg_trunc_len / 8);
if (err)
if (err) {
NL_SET_ERR_MSG(extack, "Kernel was unable to initialize cryptographic operations");
goto free_key;
}
}
param->enckeylen = cpu_to_be32((x->ealg->alg_key_len + 7) / 8);
@ -1139,10 +1145,14 @@ static int esp_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack)
x->data = NULL;
if (x->aead)
err = esp_init_aead(x);
else
err = esp_init_authenc(x);
if (x->aead) {
err = esp_init_aead(x, extack);
} else if (x->ealg) {
err = esp_init_authenc(x, extack);
} else {
NL_SET_ERR_MSG(extack, "ESP: AEAD or CRYPT must be provided");
err = -EINVAL;
}
if (err)
goto error;
@ -1160,6 +1170,7 @@ static int esp_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack)
switch (encap->encap_type) {
default:
NL_SET_ERR_MSG(extack, "Unsupported encapsulation type for ESP");
err = -EINVAL;
goto error;
case UDP_ENCAP_ESPINUDP:

53
net/ipv6/esp6.c
View File

@ -1050,16 +1050,17 @@ static void esp6_destroy(struct xfrm_state *x)
crypto_free_aead(aead);
}
static int esp_init_aead(struct xfrm_state *x)
static int esp_init_aead(struct xfrm_state *x, struct netlink_ext_ack *extack)
{
char aead_name[CRYPTO_MAX_ALG_NAME];
struct crypto_aead *aead;
int err;
err = -ENAMETOOLONG;
if (snprintf(aead_name, CRYPTO_MAX_ALG_NAME, "%s(%s)",
x->geniv, x->aead->alg_name) >= CRYPTO_MAX_ALG_NAME)
goto error;
x->geniv, x->aead->alg_name) >= CRYPTO_MAX_ALG_NAME) {
NL_SET_ERR_MSG(extack, "Algorithm name is too long");
return -ENAMETOOLONG;
}
aead = crypto_alloc_aead(aead_name, 0, 0);
err = PTR_ERR(aead);
@ -1077,11 +1078,15 @@ static int esp_init_aead(struct xfrm_state *x)
if (err)
goto error;
return 0;
error:
NL_SET_ERR_MSG(extack, "Kernel was unable to initialize cryptographic operations");
return err;
}
static int esp_init_authenc(struct xfrm_state *x)
static int esp_init_authenc(struct xfrm_state *x,
struct netlink_ext_ack *extack)
{
struct crypto_aead *aead;
struct crypto_authenc_key_param *param;
@ -1092,10 +1097,6 @@ static int esp_init_authenc(struct xfrm_state *x)
unsigned int keylen;
int err;
err = -EINVAL;
if (!x->ealg)
goto error;
err = -ENAMETOOLONG;
if ((x->props.flags & XFRM_STATE_ESN)) {
@ -1104,22 +1105,28 @@ static int esp_init_authenc(struct xfrm_state *x)
x->geniv ?: "", x->geniv ? "(" : "",
x->aalg ? x->aalg->alg_name : "digest_null",
x->ealg->alg_name,
x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME)
x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME) {
NL_SET_ERR_MSG(extack, "Algorithm name is too long");
goto error;
}
} else {
if (snprintf(authenc_name, CRYPTO_MAX_ALG_NAME,
"%s%sauthenc(%s,%s)%s",
x->geniv ?: "", x->geniv ? "(" : "",
x->aalg ? x->aalg->alg_name : "digest_null",
x->ealg->alg_name,
x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME)
x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME) {
NL_SET_ERR_MSG(extack, "Algorithm name is too long");
goto error;
}
}
aead = crypto_alloc_aead(authenc_name, 0, 0);
err = PTR_ERR(aead);
if (IS_ERR(aead))
if (IS_ERR(aead)) {
NL_SET_ERR_MSG(extack, "Kernel was unable to initialize cryptographic operations");
goto error;
}
x->data = aead;
@ -1149,17 +1156,16 @@ static int esp_init_authenc(struct xfrm_state *x)
err = -EINVAL;
if (aalg_desc->uinfo.auth.icv_fullbits / 8 !=
crypto_aead_authsize(aead)) {
pr_info("ESP: %s digestsize %u != %u\n",
x->aalg->alg_name,
crypto_aead_authsize(aead),
aalg_desc->uinfo.auth.icv_fullbits / 8);
NL_SET_ERR_MSG(extack, "Kernel was unable to initialize cryptographic operations");
goto free_key;
}
err = crypto_aead_setauthsize(
aead, x->aalg->alg_trunc_len / 8);
if (err)
if (err) {
NL_SET_ERR_MSG(extack, "Kernel was unable to initialize cryptographic operations");
goto free_key;
}
}
param->enckeylen = cpu_to_be32((x->ealg->alg_key_len + 7) / 8);
@ -1182,10 +1188,14 @@ static int esp6_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack)
x->data = NULL;
if (x->aead)
err = esp_init_aead(x);
else
err = esp_init_authenc(x);
if (x->aead) {
err = esp_init_aead(x, extack);
} else if (x->ealg) {
err = esp_init_authenc(x, extack);
} else {
NL_SET_ERR_MSG(extack, "ESP: AEAD or CRYPT must be provided");
err = -EINVAL;
}
if (err)
goto error;
@ -1213,6 +1223,7 @@ static int esp6_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack)
switch (encap->encap_type) {
default:
NL_SET_ERR_MSG(extack, "Unsupported encapsulation type for ESP");
err = -EINVAL;
goto error;
case UDP_ENCAP_ESPINUDP: