a6f37cee6e
This patch adds an userspace tool for displaying kernel crypto API statistics. Signed-off-by: Corentin Labbe <clabbe@baylibre.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
295 lines
8.4 KiB
C
295 lines
8.4 KiB
C
/* Heavily copied from libkcapi 2015 - 2017, Stephan Mueller <smueller@chronox.de> */
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#include <errno.h>
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#include <linux/cryptouser.h>
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#define CR_RTA(x) ((struct rtattr *)(((char *)(x)) + NLMSG_ALIGN(sizeof(struct crypto_user_alg))))
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static int get_stat(const char *drivername)
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{
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struct {
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struct nlmsghdr n;
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struct crypto_user_alg cru;
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} req;
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struct sockaddr_nl nl;
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int sd = 0, ret;
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socklen_t addr_len;
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struct iovec iov;
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struct msghdr msg;
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char buf[4096];
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struct nlmsghdr *res_n = (struct nlmsghdr *)buf;
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struct crypto_user_alg *cru_res = NULL;
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int res_len = 0;
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struct rtattr *tb[CRYPTOCFGA_MAX + 1];
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struct rtattr *rta;
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struct nlmsgerr *errmsg;
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memset(&req, 0, sizeof(req));
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memset(&buf, 0, sizeof(buf));
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memset(&msg, 0, sizeof(msg));
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req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.cru));
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req.n.nlmsg_flags = NLM_F_REQUEST;
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req.n.nlmsg_type = CRYPTO_MSG_GETSTAT;
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req.n.nlmsg_seq = time(NULL);
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strncpy(req.cru.cru_driver_name, drivername, strlen(drivername));
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sd = socket(AF_NETLINK, SOCK_RAW, NETLINK_CRYPTO);
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if (sd < 0) {
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fprintf(stderr, "Netlink error: cannot open netlink socket");
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return -errno;
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}
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memset(&nl, 0, sizeof(nl));
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nl.nl_family = AF_NETLINK;
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if (bind(sd, (struct sockaddr *)&nl, sizeof(nl)) < 0) {
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ret = -errno;
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fprintf(stderr, "Netlink error: cannot bind netlink socket");
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goto out;
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}
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/* sanity check that netlink socket was successfully opened */
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addr_len = sizeof(nl);
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if (getsockname(sd, (struct sockaddr *)&nl, &addr_len) < 0) {
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ret = -errno;
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printf("Netlink error: cannot getsockname");
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goto out;
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}
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if (addr_len != sizeof(nl)) {
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ret = -errno;
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printf("Netlink error: wrong address length %d", addr_len);
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goto out;
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}
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if (nl.nl_family != AF_NETLINK) {
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ret = -errno;
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printf("Netlink error: wrong address family %d",
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nl.nl_family);
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goto out;
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}
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memset(&nl, 0, sizeof(nl));
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nl.nl_family = AF_NETLINK;
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iov.iov_base = (void *)&req.n;
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iov.iov_len = req.n.nlmsg_len;
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msg.msg_name = &nl;
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msg.msg_namelen = sizeof(nl);
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msg.msg_iov = &iov;
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msg.msg_iovlen = 1;
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if (sendmsg(sd, &msg, 0) < 0) {
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ret = -errno;
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printf("Netlink error: sendmsg failed");
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goto out;
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}
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memset(buf, 0, sizeof(buf));
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iov.iov_base = buf;
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while (1) {
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iov.iov_len = sizeof(buf);
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ret = recvmsg(sd, &msg, 0);
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if (ret < 0) {
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if (errno == EINTR || errno == EAGAIN)
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continue;
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ret = -errno;
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printf("Netlink error: netlink receive error");
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goto out;
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}
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if (ret == 0) {
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ret = -errno;
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printf("Netlink error: no data");
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goto out;
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}
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if (ret > sizeof(buf)) {
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ret = -errno;
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printf("Netlink error: received too much data");
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goto out;
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}
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break;
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}
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ret = -EFAULT;
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res_len = res_n->nlmsg_len;
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if (res_n->nlmsg_type == NLMSG_ERROR) {
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errmsg = NLMSG_DATA(res_n);
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fprintf(stderr, "Fail with %d\n", errmsg->error);
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ret = errmsg->error;
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goto out;
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}
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if (res_n->nlmsg_type == CRYPTO_MSG_GETSTAT) {
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cru_res = NLMSG_DATA(res_n);
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res_len -= NLMSG_SPACE(sizeof(*cru_res));
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}
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if (res_len < 0) {
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printf("Netlink error: nlmsg len %d\n", res_len);
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goto out;
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}
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if (!cru_res) {
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ret = -EFAULT;
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printf("Netlink error: no cru_res\n");
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goto out;
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}
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rta = CR_RTA(cru_res);
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memset(tb, 0, sizeof(struct rtattr *) * (CRYPTOCFGA_MAX + 1));
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while (RTA_OK(rta, res_len)) {
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if ((rta->rta_type <= CRYPTOCFGA_MAX) && (!tb[rta->rta_type]))
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tb[rta->rta_type] = rta;
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rta = RTA_NEXT(rta, res_len);
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}
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if (res_len) {
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printf("Netlink error: unprocessed data %d",
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res_len);
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goto out;
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}
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if (tb[CRYPTOCFGA_STAT_HASH]) {
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struct rtattr *rta = tb[CRYPTOCFGA_STAT_HASH];
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struct crypto_stat *rhash =
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(struct crypto_stat *)RTA_DATA(rta);
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printf("%s\tHash\n\tHash: %u bytes: %llu\n\tErrors: %u\n",
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drivername,
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rhash->stat_hash_cnt, rhash->stat_hash_tlen,
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rhash->stat_hash_err_cnt);
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} else if (tb[CRYPTOCFGA_STAT_COMPRESS]) {
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struct rtattr *rta = tb[CRYPTOCFGA_STAT_COMPRESS];
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struct crypto_stat *rblk =
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(struct crypto_stat *)RTA_DATA(rta);
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printf("%s\tCompress\n\tCompress: %u bytes: %llu\n\tDecompress: %u bytes: %llu\n\tErrors: %u\n",
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drivername,
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rblk->stat_compress_cnt, rblk->stat_compress_tlen,
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rblk->stat_decompress_cnt, rblk->stat_decompress_tlen,
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rblk->stat_compress_err_cnt);
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} else if (tb[CRYPTOCFGA_STAT_ACOMP]) {
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struct rtattr *rta = tb[CRYPTOCFGA_STAT_ACOMP];
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struct crypto_stat *rcomp =
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(struct crypto_stat *)RTA_DATA(rta);
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printf("%s\tACompress\n\tCompress: %u bytes: %llu\n\tDecompress: %u bytes: %llu\n\tErrors: %u\n",
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drivername,
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rcomp->stat_compress_cnt, rcomp->stat_compress_tlen,
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rcomp->stat_decompress_cnt, rcomp->stat_decompress_tlen,
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rcomp->stat_compress_err_cnt);
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} else if (tb[CRYPTOCFGA_STAT_AEAD]) {
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struct rtattr *rta = tb[CRYPTOCFGA_STAT_AEAD];
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struct crypto_stat *raead =
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(struct crypto_stat *)RTA_DATA(rta);
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printf("%s\tAEAD\n\tEncrypt: %u bytes: %llu\n\tDecrypt: %u bytes: %llu\n\tErrors: %u\n",
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drivername,
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raead->stat_encrypt_cnt, raead->stat_encrypt_tlen,
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raead->stat_decrypt_cnt, raead->stat_decrypt_tlen,
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raead->stat_aead_err_cnt);
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} else if (tb[CRYPTOCFGA_STAT_BLKCIPHER]) {
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struct rtattr *rta = tb[CRYPTOCFGA_STAT_BLKCIPHER];
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struct crypto_stat *rblk =
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(struct crypto_stat *)RTA_DATA(rta);
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printf("%s\tCipher\n\tEncrypt: %u bytes: %llu\n\tDecrypt: %u bytes: %llu\n\tErrors: %u\n",
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drivername,
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rblk->stat_encrypt_cnt, rblk->stat_encrypt_tlen,
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rblk->stat_decrypt_cnt, rblk->stat_decrypt_tlen,
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rblk->stat_cipher_err_cnt);
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} else if (tb[CRYPTOCFGA_STAT_AKCIPHER]) {
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struct rtattr *rta = tb[CRYPTOCFGA_STAT_AKCIPHER];
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struct crypto_stat *rblk =
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(struct crypto_stat *)RTA_DATA(rta);
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printf("%s\tAkcipher\n\tEncrypt: %u bytes: %llu\n\tDecrypt: %u bytes: %llu\n\tSign: %u\n\tVerify: %u\n\tErrors: %u\n",
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drivername,
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rblk->stat_encrypt_cnt, rblk->stat_encrypt_tlen,
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rblk->stat_decrypt_cnt, rblk->stat_decrypt_tlen,
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rblk->stat_sign_cnt, rblk->stat_verify_cnt,
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rblk->stat_akcipher_err_cnt);
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} else if (tb[CRYPTOCFGA_STAT_CIPHER]) {
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struct rtattr *rta = tb[CRYPTOCFGA_STAT_CIPHER];
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struct crypto_stat *rblk =
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(struct crypto_stat *)RTA_DATA(rta);
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printf("%s\tcipher\n\tEncrypt: %u bytes: %llu\n\tDecrypt: %u bytes: %llu\n\tErrors: %u\n",
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drivername,
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rblk->stat_encrypt_cnt, rblk->stat_encrypt_tlen,
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rblk->stat_decrypt_cnt, rblk->stat_decrypt_tlen,
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rblk->stat_cipher_err_cnt);
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} else if (tb[CRYPTOCFGA_STAT_RNG]) {
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struct rtattr *rta = tb[CRYPTOCFGA_STAT_RNG];
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struct crypto_stat *rrng =
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(struct crypto_stat *)RTA_DATA(rta);
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printf("%s\tRNG\n\tSeed: %u\n\tGenerate: %u bytes: %llu\n\tErrors: %u\n",
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drivername,
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rrng->stat_seed_cnt,
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rrng->stat_generate_cnt, rrng->stat_generate_tlen,
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rrng->stat_rng_err_cnt);
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} else if (tb[CRYPTOCFGA_STAT_KPP]) {
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struct rtattr *rta = tb[CRYPTOCFGA_STAT_KPP];
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struct crypto_stat *rkpp =
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(struct crypto_stat *)RTA_DATA(rta);
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printf("%s\tKPP\n\tSetsecret: %u\n\tGenerate public key: %u\n\tCompute_shared_secret: %u\n\tErrors: %u\n",
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drivername,
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rkpp->stat_setsecret_cnt,
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rkpp->stat_generate_public_key_cnt,
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rkpp->stat_compute_shared_secret_cnt,
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rkpp->stat_kpp_err_cnt);
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} else {
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fprintf(stderr, "%s is of an unknown algorithm\n", drivername);
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}
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ret = 0;
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out:
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close(sd);
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return ret;
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}
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int main(int argc, const char *argv[])
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{
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char buf[4096];
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FILE *procfd;
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int i, lastspace;
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int ret;
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procfd = fopen("/proc/crypto", "r");
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if (!procfd) {
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ret = errno;
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fprintf(stderr, "Cannot open /proc/crypto %s\n", strerror(errno));
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return ret;
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}
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if (argc > 1) {
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if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
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printf("Usage: %s [-h|--help] display this help\n", argv[0]);
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printf("Usage: %s display all crypto statistics\n", argv[0]);
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printf("Usage: %s drivername1 drivername2 ... = display crypto statistics about drivername1 ...\n", argv[0]);
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return 0;
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}
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for (i = 1; i < argc; i++) {
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ret = get_stat(argv[i]);
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if (ret) {
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fprintf(stderr, "Failed with %s\n", strerror(-ret));
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return ret;
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}
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}
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return 0;
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}
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while (fgets(buf, sizeof(buf), procfd)) {
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if (!strncmp(buf, "driver", 6)) {
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lastspace = 0;
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i = 0;
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while (i < strlen(buf)) {
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i++;
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if (buf[i] == ' ')
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lastspace = i;
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}
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buf[strlen(buf) - 1] = '\0';
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ret = get_stat(buf + lastspace + 1);
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if (ret) {
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fprintf(stderr, "Failed with %s\n", strerror(-ret));
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goto out;
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}
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}
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}
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out:
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fclose(procfd);
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return ret;
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}
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