This patch extends bt_crypto with AF_ALG socket for cmac(aes) hash.
Socket is created on bt_crybto initialization.
---
v2: Change name of sign function from patch 2/3
src/shared/crypto.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/src/shared/crypto.c b/src/shared/crypto.c
index cc7536a..f0b2979 100644
--- a/src/shared/crypto.c
+++ b/src/shared/crypto.c
@@ -70,6 +70,7 @@ struct bt_crypto {
int ref_count;
int ecb_aes;
int urandom;
+ int cmac_aes;
};
static int urandom_setup(void)
@@ -105,6 +106,28 @@ static int ecb_aes_setup(void)
return fd;
}
+static int cmac_aes_setup(void)
+{
+ struct sockaddr_alg salg;
+ int fd;
+
+ fd = socket(PF_ALG, SOCK_SEQPACKET | SOCK_CLOEXEC, 0);
+ if (fd < 0)
+ return -1;
+
+ memset(&salg, 0, sizeof(salg));
+ salg.salg_family = AF_ALG;
+ strcpy((char *) salg.salg_type, "hash");
+ strcpy((char *) salg.salg_name, "cmac(aes)");
+
+ if (bind(fd, (struct sockaddr *) &salg, sizeof(salg)) < 0) {
+ close(fd);
+ return -1;
+ }
+
+ return fd;
+}
+
struct bt_crypto *bt_crypto_new(void)
{
struct bt_crypto *crypto;
@@ -126,6 +149,14 @@ struct bt_crypto *bt_crypto_new(void)
return NULL;
}
+ crypto->cmac_aes = cmac_aes_setup();
+ if (crypto->cmac_aes < 0) {
+ close(crypto->urandom);
+ close(crypto->ecb_aes);
+ free(crypto);
+ return NULL;
+ }
+
return bt_crypto_ref(crypto);
}
@@ -149,6 +180,7 @@ void bt_crypto_unref(struct bt_crypto *crypto)
close(crypto->urandom);
close(crypto->ecb_aes);
+ close(crypto->cmac_aes);
free(crypto);
}
--
1.8.4
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