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authorHerbert Xu <herbert@gondor.apana.org.au>2007-12-04 19:17:50 +1100
committerHerbert Xu <herbert@gondor.apana.org.au>2008-01-11 08:16:31 +1100
commit6160b289929c0b622e64aa36106d8e6e53fcd826 (patch)
treed8968b0e4aea9d9ef80459d344cd9f4a3e6221b2 /crypto/tcrypt.c
parent8df213d9b520a4b58b7a8f7f2200324d4e40363d (diff)
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[CRYPTO] gcm: Fix ICV handling
The crypto_aead convention for ICVs is to include it directly in the output. If we decided to change this in future then we would make the ICV (if the algorithm has an explicit one) available in the request itself. For now no algorithm needs this so this patch changes gcm to conform to this convention. It also adjusts the tcrypt aead tests to take this into account. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/tcrypt.c')
-rw-r--r--crypto/tcrypt.c44
1 files changed, 16 insertions, 28 deletions
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index df93595c2c6..a6d4160c37f 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -235,6 +235,7 @@ static void test_aead(char *algo, int enc, struct aead_testvec *template,
struct scatterlist asg[8];
const char *e;
struct tcrypt_result result;
+ unsigned int authsize;
if (enc == ENCRYPT)
e = "encryption";
@@ -265,6 +266,8 @@ static void test_aead(char *algo, int enc, struct aead_testvec *template,
return;
}
+ authsize = crypto_aead_authsize(tfm);
+
req = aead_request_alloc(tfm, GFP_KERNEL);
if (!req) {
printk(KERN_INFO "failed to allocate request for %s\n", algo);
@@ -296,7 +299,7 @@ static void test_aead(char *algo, int enc, struct aead_testvec *template,
}
sg_init_one(&sg[0], aead_tv[i].input,
- aead_tv[i].ilen);
+ aead_tv[i].ilen + (enc ? authsize : 0));
sg_init_one(&asg[0], aead_tv[i].assoc,
aead_tv[i].alen);
@@ -307,13 +310,9 @@ static void test_aead(char *algo, int enc, struct aead_testvec *template,
aead_request_set_assoc(req, asg, aead_tv[i].alen);
- if (enc) {
- ret = crypto_aead_encrypt(req);
- } else {
- memcpy(req->__ctx, aead_tv[i].tag,
- aead_tv[i].tlen);
- ret = crypto_aead_decrypt(req);
- }
+ ret = enc ?
+ crypto_aead_encrypt(req) :
+ crypto_aead_decrypt(req);
switch (ret) {
case 0:
@@ -335,16 +334,10 @@ static void test_aead(char *algo, int enc, struct aead_testvec *template,
q = kmap(sg_page(&sg[0])) + sg[0].offset;
hexdump(q, aead_tv[i].rlen);
- printk(KERN_INFO "auth tag: ");
- hexdump((unsigned char *)req->__ctx, aead_tv[i].tlen);
printk(KERN_INFO "enc/dec: %s\n",
memcmp(q, aead_tv[i].result,
aead_tv[i].rlen) ? "fail" : "pass");
-
- printk(KERN_INFO "auth tag: %s\n",
- memcmp(req->__ctx, aead_tv[i].tag,
- aead_tv[i].tlen) ? "fail" : "pass");
}
}
@@ -381,6 +374,9 @@ static void test_aead(char *algo, int enc, struct aead_testvec *template,
aead_tv[i].tap[k]);
}
+ if (enc)
+ sg[k - 1].length += authsize;
+
sg_init_table(asg, aead_tv[i].anp);
for (k = 0, temp = 0; k < aead_tv[i].anp; k++) {
memcpy(&axbuf[IDX[k]],
@@ -397,13 +393,9 @@ static void test_aead(char *algo, int enc, struct aead_testvec *template,
aead_request_set_assoc(req, asg, aead_tv[i].alen);
- if (enc) {
- ret = crypto_aead_encrypt(req);
- } else {
- memcpy(req->__ctx, aead_tv[i].tag,
- aead_tv[i].tlen);
- ret = crypto_aead_decrypt(req);
- }
+ ret = enc ?
+ crypto_aead_encrypt(req) :
+ crypto_aead_decrypt(req);
switch (ret) {
case 0:
@@ -429,17 +421,13 @@ static void test_aead(char *algo, int enc, struct aead_testvec *template,
hexdump(q, aead_tv[i].tap[k]);
printk(KERN_INFO "%s\n",
memcmp(q, aead_tv[i].result + temp,
- aead_tv[i].tap[k]) ?
+ aead_tv[i].tap[k] -
+ (k < aead_tv[i].np - 1 || enc ?
+ 0 : authsize)) ?
"fail" : "pass");
temp += aead_tv[i].tap[k];
}
- printk(KERN_INFO "auth tag: ");
- hexdump((unsigned char *)req->__ctx, aead_tv[i].tlen);
-
- printk(KERN_INFO "auth tag: %s\n",
- memcmp(req->__ctx, aead_tv[i].tag,
- aead_tv[i].tlen) ? "fail" : "pass");
}
}