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-rw-r--r--crypto/testmgr.c6
-rw-r--r--crypto/testmgr.h155
-rw-r--r--crypto/vmac.c130
3 files changed, 273 insertions, 18 deletions
diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 11e45352fd0b..60a557b0f8d3 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -3484,6 +3484,12 @@ static const struct alg_test_desc alg_test_descs[] = {
.hash = __VECS(aes_vmac128_tv_template)
}
}, {
+ .alg = "vmac64(aes)",
+ .test = alg_test_hash,
+ .suite = {
+ .hash = __VECS(vmac64_aes_tv_template)
+ }
+ }, {
.alg = "wp256",
.test = alg_test_hash,
.suite = {
diff --git a/crypto/testmgr.h b/crypto/testmgr.h
index b950aa234e43..7b022c47a623 100644
--- a/crypto/testmgr.h
+++ b/crypto/testmgr.h
@@ -4705,6 +4705,161 @@ static const struct hash_testvec aes_vmac128_tv_template[] = {
},
};
+static const char vmac64_string1[144] = {
+ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+ '\x01', '\x01', '\x01', '\x01', '\x02', '\x03', '\x02', '\x02',
+ '\x02', '\x04', '\x01', '\x07', '\x04', '\x01', '\x04', '\x03',
+};
+
+static const char vmac64_string2[144] = {
+ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+ 'a', 'b', 'c',
+};
+
+static const char vmac64_string3[144] = {
+ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+ 'a', 'b', 'c', 'a', 'b', 'c', 'a', 'b',
+ 'c', 'a', 'b', 'c', 'a', 'b', 'c', 'a',
+ 'b', 'c', 'a', 'b', 'c', 'a', 'b', 'c',
+ 'a', 'b', 'c', 'a', 'b', 'c', 'a', 'b',
+ 'c', 'a', 'b', 'c', 'a', 'b', 'c', 'a',
+ 'b', 'c', 'a', 'b', 'c', 'a', 'b', 'c',
+};
+
+static const char vmac64_string4[33] = {
+ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+ 'b', 'c', 'e', 'f', 'i', 'j', 'l', 'm',
+ 'o', 'p', 'r', 's', 't', 'u', 'w', 'x',
+ 'z',
+};
+
+static const char vmac64_string5[143] = {
+ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+ 'r', 'm', 'b', 't', 'c', 'o', 'l', 'k',
+ ']', '%', '9', '2', '7', '!', 'A',
+};
+
+static const char vmac64_string6[145] = {
+ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+ '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
+ 'p', 't', '*', '7', 'l', 'i', '!', '#',
+ 'w', '0', 'z', '/', '4', 'A', 'n',
+};
+
+static const struct hash_testvec vmac64_aes_tv_template[] = {
+ { /* draft-krovetz-vmac-01 test vector 1 */
+ .key = "abcdefghijklmnop",
+ .ksize = 16,
+ .plaintext = "\0\0\0\0\0\0\0\0bcdefghi",
+ .psize = 16,
+ .digest = "\x25\x76\xbe\x1c\x56\xd8\xb8\x1b",
+ }, { /* draft-krovetz-vmac-01 test vector 2 */
+ .key = "abcdefghijklmnop",
+ .ksize = 16,
+ .plaintext = "\0\0\0\0\0\0\0\0bcdefghiabc",
+ .psize = 19,
+ .digest = "\x2d\x37\x6c\xf5\xb1\x81\x3c\xe5",
+ }, { /* draft-krovetz-vmac-01 test vector 3 */
+ .key = "abcdefghijklmnop",
+ .ksize = 16,
+ .plaintext = "\0\0\0\0\0\0\0\0bcdefghi"
+ "abcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabc",
+ .psize = 64,
+ .digest = "\xe8\x42\x1f\x61\xd5\x73\xd2\x98",
+ }, { /* draft-krovetz-vmac-01 test vector 4 */
+ .key = "abcdefghijklmnop",
+ .ksize = 16,
+ .plaintext = "\0\0\0\0\0\0\0\0bcdefghi"
+ "abcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabc"
+ "abcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabc"
+ "abcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabc"
+ "abcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabc"
+ "abcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabc"
+ "abcabcabcabcabcabcabcabcabcabcabcabcabcabcabc",
+ .psize = 316,
+ .digest = "\x44\x92\xdf\x6c\x5c\xac\x1b\xbe",
+ .tap = { 1, 100, 200, 15 },
+ .np = 4,
+ }, {
+ .key = "\x00\x01\x02\x03\x04\x05\x06\x07"
+ "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
+ .ksize = 16,
+ .plaintext = "\x00\x00\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x00",
+ .psize = 16,
+ .digest = "\x54\x7b\xa4\x77\x35\x80\x58\x07",
+ }, {
+ .key = "\x00\x01\x02\x03\x04\x05\x06\x07"
+ "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
+ .ksize = 16,
+ .plaintext = vmac64_string1,
+ .psize = sizeof(vmac64_string1),
+ .digest = "\xa1\x8c\x68\xae\xd3\x3c\xf5\xce",
+ }, {
+ .key = "\x00\x01\x02\x03\x04\x05\x06\x07"
+ "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
+ .ksize = 16,
+ .plaintext = vmac64_string2,
+ .psize = sizeof(vmac64_string2),
+ .digest = "\x2d\x14\xbd\x81\x73\xb0\x27\xc9",
+ }, {
+ .key = "\x00\x01\x02\x03\x04\x05\x06\x07"
+ "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
+ .ksize = 16,
+ .plaintext = vmac64_string3,
+ .psize = sizeof(vmac64_string3),
+ .digest = "\x19\x0b\x47\x98\x8c\x95\x1a\x8d",
+ }, {
+ .key = "abcdefghijklmnop",
+ .ksize = 16,
+ .plaintext = "\x00\x00\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x00",
+ .psize = 16,
+ .digest = "\x84\x8f\x55\x9e\x26\xa1\x89\x3b",
+ }, {
+ .key = "abcdefghijklmnop",
+ .ksize = 16,
+ .plaintext = vmac64_string1,
+ .psize = sizeof(vmac64_string1),
+ .digest = "\xc2\x74\x8d\xf6\xb0\xab\x5e\xab",
+ }, {
+ .key = "abcdefghijklmnop",
+ .ksize = 16,
+ .plaintext = vmac64_string2,
+ .psize = sizeof(vmac64_string2),
+ .digest = "\xdf\x09\x7b\x3d\x42\x68\x15\x11",
+ }, {
+ .key = "abcdefghijklmnop",
+ .ksize = 16,
+ .plaintext = vmac64_string3,
+ .psize = sizeof(vmac64_string3),
+ .digest = "\xd4\xfa\x8f\xed\xe1\x8f\x32\x8b",
+ }, {
+ .key = "a09b5cd!f#07K\x00\x00\x00",
+ .ksize = 16,
+ .plaintext = vmac64_string4,
+ .psize = sizeof(vmac64_string4),
+ .digest = "\x5f\xa1\x4e\x42\xea\x0f\xa5\xab",
+ }, {
+ .key = "a09b5cd!f#07K\x00\x00\x00",
+ .ksize = 16,
+ .plaintext = vmac64_string5,
+ .psize = sizeof(vmac64_string5),
+ .digest = "\x60\x67\xe8\x1d\xbc\x98\x31\x25",
+ }, {
+ .key = "a09b5cd!f#07K\x00\x00\x00",
+ .ksize = 16,
+ .plaintext = vmac64_string6,
+ .psize = sizeof(vmac64_string6),
+ .digest = "\x41\xeb\x65\x95\x47\x9b\xae\xc4",
+ },
+};
+
/*
* SHA384 HMAC test vectors from RFC4231
*/
diff --git a/crypto/vmac.c b/crypto/vmac.c
index bb2fc787d615..bf1e385bc684 100644
--- a/crypto/vmac.c
+++ b/crypto/vmac.c
@@ -45,6 +45,7 @@
#define VMAC_KEY_SIZE 128/* Must be 128, 192 or 256 */
#define VMAC_KEY_LEN (VMAC_KEY_SIZE/8)
#define VMAC_NHBYTES 128/* Must 2^i for any 3 < i < 13 Standard = 128*/
+#define VMAC_NONCEBYTES 16
/* per-transform (per-key) context */
struct vmac_tfm_ctx {
@@ -63,6 +64,11 @@ struct vmac_desc_ctx {
unsigned int partial_size; /* size of the partial block */
bool first_block_processed;
u64 polytmp[2*VMAC_TAG_LEN/64]; /* running total of L2-hash */
+ union {
+ u8 bytes[VMAC_NONCEBYTES];
+ __be64 pads[VMAC_NONCEBYTES / 8];
+ } nonce;
+ unsigned int nonce_size; /* nonce bytes filled so far */
};
/*
@@ -480,6 +486,17 @@ static int vmac_init(struct shash_desc *desc)
dctx->partial_size = 0;
dctx->first_block_processed = false;
memcpy(dctx->polytmp, tctx->polykey, sizeof(dctx->polytmp));
+ dctx->nonce_size = 0;
+ return 0;
+}
+
+static int vmac_init_with_hardcoded_nonce(struct shash_desc *desc)
+{
+ struct vmac_desc_ctx *dctx = shash_desc_ctx(desc);
+
+ vmac_init(desc);
+ memset(&dctx->nonce, 0, VMAC_NONCEBYTES);
+ dctx->nonce_size = VMAC_NONCEBYTES;
return 0;
}
@@ -489,6 +506,15 @@ static int vmac_update(struct shash_desc *desc, const u8 *p, unsigned int len)
struct vmac_desc_ctx *dctx = shash_desc_ctx(desc);
unsigned int n;
+ /* Nonce is passed as first VMAC_NONCEBYTES bytes of data */
+ if (dctx->nonce_size < VMAC_NONCEBYTES) {
+ n = min(len, VMAC_NONCEBYTES - dctx->nonce_size);
+ memcpy(&dctx->nonce.bytes[dctx->nonce_size], p, n);
+ dctx->nonce_size += n;
+ p += n;
+ len -= n;
+ }
+
if (dctx->partial_size) {
n = min(len, VMAC_NHBYTES - dctx->partial_size);
memcpy(&dctx->partial[dctx->partial_size], p, n);
@@ -544,30 +570,62 @@ static u64 vhash_final(const struct vmac_tfm_ctx *tctx,
return l3hash(ch, cl, tctx->l3key[0], tctx->l3key[1], partial * 8);
}
-static int vmac_final(struct shash_desc *desc, u8 *out)
+static int __vmac_final(struct shash_desc *desc, u64 *mac)
{
const struct vmac_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
struct vmac_desc_ctx *dctx = shash_desc_ctx(desc);
- static const u8 nonce[16] = {}; /* TODO: this is insecure */
- union {
- u8 bytes[16];
- __be64 pads[2];
- } block;
int index;
u64 hash, pad;
+ if (dctx->nonce_size != VMAC_NONCEBYTES)
+ return -EINVAL;
+
+ /*
+ * The VMAC specification requires a nonce at least 1 bit shorter than
+ * the block cipher's block length, so we actually only accept a 127-bit
+ * nonce. We define the unused bit to be the first one and require that
+ * it be 0, so the needed prepending of a 0 bit is implicit.
+ */
+ if (dctx->nonce.bytes[0] & 0x80)
+ return -EINVAL;
+
/* Finish calculating the VHASH of the message */
hash = vhash_final(tctx, dctx);
/* Generate pseudorandom pad by encrypting the nonce */
- memcpy(&block, nonce, 16);
- index = block.bytes[15] & 1;
- block.bytes[15] &= ~1;
- crypto_cipher_encrypt_one(tctx->cipher, block.bytes, block.bytes);
- pad = be64_to_cpu(block.pads[index]);
+ BUILD_BUG_ON(VMAC_NONCEBYTES != 2 * (VMAC_TAG_LEN / 8));
+ index = dctx->nonce.bytes[VMAC_NONCEBYTES - 1] & 1;
+ dctx->nonce.bytes[VMAC_NONCEBYTES - 1] &= ~1;
+ crypto_cipher_encrypt_one(tctx->cipher, dctx->nonce.bytes,
+ dctx->nonce.bytes);
+ pad = be64_to_cpu(dctx->nonce.pads[index]);
/* The VMAC is the sum of VHASH and the pseudorandom pad */
- put_unaligned_le64(hash + pad, out);
+ *mac = hash + pad;
+ return 0;
+}
+
+static int vmac_final_le(struct shash_desc *desc, u8 *out)
+{
+ u64 mac;
+ int err;
+
+ err = __vmac_final(desc, &mac);
+ if (err)
+ return err;
+ put_unaligned_le64(mac, out);
+ return 0;
+}
+
+static int vmac_final_be(struct shash_desc *desc, u8 *out)
+{
+ u64 mac;
+ int err;
+
+ err = __vmac_final(desc, &mac);
+ if (err)
+ return err;
+ put_unaligned_be64(mac, out);
return 0;
}
@@ -593,7 +651,8 @@ static void vmac_exit_tfm(struct crypto_tfm *tfm)
crypto_free_cipher(tctx->cipher);
}
-static int vmac_create(struct crypto_template *tmpl, struct rtattr **tb)
+static int vmac_create_common(struct crypto_template *tmpl, struct rtattr **tb,
+ bool vmac64)
{
struct shash_instance *inst;
struct crypto_alg *alg;
@@ -609,10 +668,10 @@ static int vmac_create(struct crypto_template *tmpl, struct rtattr **tb)
return PTR_ERR(alg);
err = -EINVAL;
- if (alg->cra_blocksize != 16)
+ if (alg->cra_blocksize != VMAC_NONCEBYTES)
goto out_put_alg;
- inst = shash_alloc_instance("vmac", alg);
+ inst = shash_alloc_instance(tmpl->name, alg);
err = PTR_ERR(inst);
if (IS_ERR(inst))
goto out_put_alg;
@@ -633,9 +692,15 @@ static int vmac_create(struct crypto_template *tmpl, struct rtattr **tb)
inst->alg.descsize = sizeof(struct vmac_desc_ctx);
inst->alg.digestsize = VMAC_TAG_LEN / 8;
- inst->alg.init = vmac_init;
+ if (vmac64) {
+ inst->alg.init = vmac_init;
+ inst->alg.final = vmac_final_be;
+ } else {
+ pr_warn("vmac: using insecure hardcoded nonce\n");
+ inst->alg.init = vmac_init_with_hardcoded_nonce;
+ inst->alg.final = vmac_final_le;
+ }
inst->alg.update = vmac_update;
- inst->alg.final = vmac_final;
inst->alg.setkey = vmac_setkey;
err = shash_register_instance(tmpl, inst);
@@ -649,6 +714,16 @@ out_put_alg:
return err;
}
+static int vmac_create(struct crypto_template *tmpl, struct rtattr **tb)
+{
+ return vmac_create_common(tmpl, tb, false);
+}
+
+static int vmac64_create(struct crypto_template *tmpl, struct rtattr **tb)
+{
+ return vmac_create_common(tmpl, tb, true);
+}
+
static struct crypto_template vmac_tmpl = {
.name = "vmac",
.create = vmac_create,
@@ -656,14 +731,32 @@ static struct crypto_template vmac_tmpl = {
.module = THIS_MODULE,
};
+static struct crypto_template vmac64_tmpl = {
+ .name = "vmac64",
+ .create = vmac64_create,
+ .free = shash_free_instance,
+ .module = THIS_MODULE,
+};
+
static int __init vmac_module_init(void)
{
- return crypto_register_template(&vmac_tmpl);
+ int err;
+
+ err = crypto_register_template(&vmac_tmpl);
+ if (err)
+ return err;
+
+ err = crypto_register_template(&vmac64_tmpl);
+ if (err)
+ crypto_unregister_template(&vmac_tmpl);
+
+ return err;
}
static void __exit vmac_module_exit(void)
{
crypto_unregister_template(&vmac_tmpl);
+ crypto_unregister_template(&vmac64_tmpl);
}
module_init(vmac_module_init);
@@ -672,3 +765,4 @@ module_exit(vmac_module_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("VMAC hash algorithm");
MODULE_ALIAS_CRYPTO("vmac");
+MODULE_ALIAS_CRYPTO("vmac64");
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