Commit a6f37cee authored by Corentin Labbe's avatar Corentin Labbe Committed by Herbert Xu

crypto: tools - Add cryptostat userspace

This patch adds an userspace tool for displaying kernel crypto API
statistics.
Signed-off-by: default avatarCorentin Labbe <clabbe@baylibre.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent cac5818c
/* Heavily copied from libkcapi 2015 - 2017, Stephan Mueller <smueller@chronox.de> */
#include <errno.h>
#include <linux/cryptouser.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#define CR_RTA(x) ((struct rtattr *)(((char *)(x)) + NLMSG_ALIGN(sizeof(struct crypto_user_alg))))
static int get_stat(const char *drivername)
{
struct {
struct nlmsghdr n;
struct crypto_user_alg cru;
} req;
struct sockaddr_nl nl;
int sd = 0, ret;
socklen_t addr_len;
struct iovec iov;
struct msghdr msg;
char buf[4096];
struct nlmsghdr *res_n = (struct nlmsghdr *)buf;
struct crypto_user_alg *cru_res = NULL;
int res_len = 0;
struct rtattr *tb[CRYPTOCFGA_MAX + 1];
struct rtattr *rta;
struct nlmsgerr *errmsg;
memset(&req, 0, sizeof(req));
memset(&buf, 0, sizeof(buf));
memset(&msg, 0, sizeof(msg));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.cru));
req.n.nlmsg_flags = NLM_F_REQUEST;
req.n.nlmsg_type = CRYPTO_MSG_GETSTAT;
req.n.nlmsg_seq = time(NULL);
strncpy(req.cru.cru_driver_name, drivername, strlen(drivername));
sd = socket(AF_NETLINK, SOCK_RAW, NETLINK_CRYPTO);
if (sd < 0) {
fprintf(stderr, "Netlink error: cannot open netlink socket");
return -errno;
}
memset(&nl, 0, sizeof(nl));
nl.nl_family = AF_NETLINK;
if (bind(sd, (struct sockaddr *)&nl, sizeof(nl)) < 0) {
ret = -errno;
fprintf(stderr, "Netlink error: cannot bind netlink socket");
goto out;
}
/* sanity check that netlink socket was successfully opened */
addr_len = sizeof(nl);
if (getsockname(sd, (struct sockaddr *)&nl, &addr_len) < 0) {
ret = -errno;
printf("Netlink error: cannot getsockname");
goto out;
}
if (addr_len != sizeof(nl)) {
ret = -errno;
printf("Netlink error: wrong address length %d", addr_len);
goto out;
}
if (nl.nl_family != AF_NETLINK) {
ret = -errno;
printf("Netlink error: wrong address family %d",
nl.nl_family);
goto out;
}
memset(&nl, 0, sizeof(nl));
nl.nl_family = AF_NETLINK;
iov.iov_base = (void *)&req.n;
iov.iov_len = req.n.nlmsg_len;
msg.msg_name = &nl;
msg.msg_namelen = sizeof(nl);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
if (sendmsg(sd, &msg, 0) < 0) {
ret = -errno;
printf("Netlink error: sendmsg failed");
goto out;
}
memset(buf, 0, sizeof(buf));
iov.iov_base = buf;
while (1) {
iov.iov_len = sizeof(buf);
ret = recvmsg(sd, &msg, 0);
if (ret < 0) {
if (errno == EINTR || errno == EAGAIN)
continue;
ret = -errno;
printf("Netlink error: netlink receive error");
goto out;
}
if (ret == 0) {
ret = -errno;
printf("Netlink error: no data");
goto out;
}
if (ret > sizeof(buf)) {
ret = -errno;
printf("Netlink error: received too much data");
goto out;
}
break;
}
ret = -EFAULT;
res_len = res_n->nlmsg_len;
if (res_n->nlmsg_type == NLMSG_ERROR) {
errmsg = NLMSG_DATA(res_n);
fprintf(stderr, "Fail with %d\n", errmsg->error);
ret = errmsg->error;
goto out;
}
if (res_n->nlmsg_type == CRYPTO_MSG_GETSTAT) {
cru_res = NLMSG_DATA(res_n);
res_len -= NLMSG_SPACE(sizeof(*cru_res));
}
if (res_len < 0) {
printf("Netlink error: nlmsg len %d\n", res_len);
goto out;
}
if (!cru_res) {
ret = -EFAULT;
printf("Netlink error: no cru_res\n");
goto out;
}
rta = CR_RTA(cru_res);
memset(tb, 0, sizeof(struct rtattr *) * (CRYPTOCFGA_MAX + 1));
while (RTA_OK(rta, res_len)) {
if ((rta->rta_type <= CRYPTOCFGA_MAX) && (!tb[rta->rta_type]))
tb[rta->rta_type] = rta;
rta = RTA_NEXT(rta, res_len);
}
if (res_len) {
printf("Netlink error: unprocessed data %d",
res_len);
goto out;
}
if (tb[CRYPTOCFGA_STAT_HASH]) {
struct rtattr *rta = tb[CRYPTOCFGA_STAT_HASH];
struct crypto_stat *rhash =
(struct crypto_stat *)RTA_DATA(rta);
printf("%s\tHash\n\tHash: %u bytes: %llu\n\tErrors: %u\n",
drivername,
rhash->stat_hash_cnt, rhash->stat_hash_tlen,
rhash->stat_hash_err_cnt);
} else if (tb[CRYPTOCFGA_STAT_COMPRESS]) {
struct rtattr *rta = tb[CRYPTOCFGA_STAT_COMPRESS];
struct crypto_stat *rblk =
(struct crypto_stat *)RTA_DATA(rta);
printf("%s\tCompress\n\tCompress: %u bytes: %llu\n\tDecompress: %u bytes: %llu\n\tErrors: %u\n",
drivername,
rblk->stat_compress_cnt, rblk->stat_compress_tlen,
rblk->stat_decompress_cnt, rblk->stat_decompress_tlen,
rblk->stat_compress_err_cnt);
} else if (tb[CRYPTOCFGA_STAT_ACOMP]) {
struct rtattr *rta = tb[CRYPTOCFGA_STAT_ACOMP];
struct crypto_stat *rcomp =
(struct crypto_stat *)RTA_DATA(rta);
printf("%s\tACompress\n\tCompress: %u bytes: %llu\n\tDecompress: %u bytes: %llu\n\tErrors: %u\n",
drivername,
rcomp->stat_compress_cnt, rcomp->stat_compress_tlen,
rcomp->stat_decompress_cnt, rcomp->stat_decompress_tlen,
rcomp->stat_compress_err_cnt);
} else if (tb[CRYPTOCFGA_STAT_AEAD]) {
struct rtattr *rta = tb[CRYPTOCFGA_STAT_AEAD];
struct crypto_stat *raead =
(struct crypto_stat *)RTA_DATA(rta);
printf("%s\tAEAD\n\tEncrypt: %u bytes: %llu\n\tDecrypt: %u bytes: %llu\n\tErrors: %u\n",
drivername,
raead->stat_encrypt_cnt, raead->stat_encrypt_tlen,
raead->stat_decrypt_cnt, raead->stat_decrypt_tlen,
raead->stat_aead_err_cnt);
} else if (tb[CRYPTOCFGA_STAT_BLKCIPHER]) {
struct rtattr *rta = tb[CRYPTOCFGA_STAT_BLKCIPHER];
struct crypto_stat *rblk =
(struct crypto_stat *)RTA_DATA(rta);
printf("%s\tCipher\n\tEncrypt: %u bytes: %llu\n\tDecrypt: %u bytes: %llu\n\tErrors: %u\n",
drivername,
rblk->stat_encrypt_cnt, rblk->stat_encrypt_tlen,
rblk->stat_decrypt_cnt, rblk->stat_decrypt_tlen,
rblk->stat_cipher_err_cnt);
} else if (tb[CRYPTOCFGA_STAT_AKCIPHER]) {
struct rtattr *rta = tb[CRYPTOCFGA_STAT_AKCIPHER];
struct crypto_stat *rblk =
(struct crypto_stat *)RTA_DATA(rta);
printf("%s\tAkcipher\n\tEncrypt: %u bytes: %llu\n\tDecrypt: %u bytes: %llu\n\tSign: %u\n\tVerify: %u\n\tErrors: %u\n",
drivername,
rblk->stat_encrypt_cnt, rblk->stat_encrypt_tlen,
rblk->stat_decrypt_cnt, rblk->stat_decrypt_tlen,
rblk->stat_sign_cnt, rblk->stat_verify_cnt,
rblk->stat_akcipher_err_cnt);
} else if (tb[CRYPTOCFGA_STAT_CIPHER]) {
struct rtattr *rta = tb[CRYPTOCFGA_STAT_CIPHER];
struct crypto_stat *rblk =
(struct crypto_stat *)RTA_DATA(rta);
printf("%s\tcipher\n\tEncrypt: %u bytes: %llu\n\tDecrypt: %u bytes: %llu\n\tErrors: %u\n",
drivername,
rblk->stat_encrypt_cnt, rblk->stat_encrypt_tlen,
rblk->stat_decrypt_cnt, rblk->stat_decrypt_tlen,
rblk->stat_cipher_err_cnt);
} else if (tb[CRYPTOCFGA_STAT_RNG]) {
struct rtattr *rta = tb[CRYPTOCFGA_STAT_RNG];
struct crypto_stat *rrng =
(struct crypto_stat *)RTA_DATA(rta);
printf("%s\tRNG\n\tSeed: %u\n\tGenerate: %u bytes: %llu\n\tErrors: %u\n",
drivername,
rrng->stat_seed_cnt,
rrng->stat_generate_cnt, rrng->stat_generate_tlen,
rrng->stat_rng_err_cnt);
} else if (tb[CRYPTOCFGA_STAT_KPP]) {
struct rtattr *rta = tb[CRYPTOCFGA_STAT_KPP];
struct crypto_stat *rkpp =
(struct crypto_stat *)RTA_DATA(rta);
printf("%s\tKPP\n\tSetsecret: %u\n\tGenerate public key: %u\n\tCompute_shared_secret: %u\n\tErrors: %u\n",
drivername,
rkpp->stat_setsecret_cnt,
rkpp->stat_generate_public_key_cnt,
rkpp->stat_compute_shared_secret_cnt,
rkpp->stat_kpp_err_cnt);
} else {
fprintf(stderr, "%s is of an unknown algorithm\n", drivername);
}
ret = 0;
out:
close(sd);
return ret;
}
int main(int argc, const char *argv[])
{
char buf[4096];
FILE *procfd;
int i, lastspace;
int ret;
procfd = fopen("/proc/crypto", "r");
if (!procfd) {
ret = errno;
fprintf(stderr, "Cannot open /proc/crypto %s\n", strerror(errno));
return ret;
}
if (argc > 1) {
if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
printf("Usage: %s [-h|--help] display this help\n", argv[0]);
printf("Usage: %s display all crypto statistics\n", argv[0]);
printf("Usage: %s drivername1 drivername2 ... = display crypto statistics about drivername1 ...\n", argv[0]);
return 0;
}
for (i = 1; i < argc; i++) {
ret = get_stat(argv[i]);
if (ret) {
fprintf(stderr, "Failed with %s\n", strerror(-ret));
return ret;
}
}
return 0;
}
while (fgets(buf, sizeof(buf), procfd)) {
if (!strncmp(buf, "driver", 6)) {
lastspace = 0;
i = 0;
while (i < strlen(buf)) {
i++;
if (buf[i] == ' ')
lastspace = i;
}
buf[strlen(buf) - 1] = '\0';
ret = get_stat(buf + lastspace + 1);
if (ret) {
fprintf(stderr, "Failed with %s\n", strerror(-ret));
goto out;
}
}
}
out:
fclose(procfd);
return ret;
}
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