From: Ard Biesheuvel Subject: Re: [PATCH v3 2/2] crypto: tools: Add cryptostat userspace Date: Fri, 28 Sep 2018 15:13:26 +0200 Message-ID: References: <1537351855-16618-1-git-send-email-clabbe@baylibre.com> <1537351855-16618-3-git-send-email-clabbe@baylibre.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Cc: "David S. Miller" , Herbert Xu , nhorman@tuxdriver.com, "open list:HARDWARE RANDOM NUMBER GENERATOR CORE" , Linux Kernel Mailing List To: Corentin Labbe Return-path: In-Reply-To: <1537351855-16618-3-git-send-email-clabbe@baylibre.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org On 19 September 2018 at 12:10, Corentin Labbe wrote: > This patch adds an userspace tool for displaying kernel crypto API > statistics. > > Signed-off-by: Corentin Labbe How do I actually build this thing? > --- > tools/crypto/getstat.c | 294 +++++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 294 insertions(+) > create mode 100644 tools/crypto/getstat.c > > diff --git a/tools/crypto/getstat.c b/tools/crypto/getstat.c > new file mode 100644 > index 000000000000..24115173a483 > --- /dev/null > +++ b/tools/crypto/getstat.c > @@ -0,0 +1,294 @@ > +/* Heavily copied from libkcapi 2015 - 2017, Stephan Mueller */ > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#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; > +} > -- > 2.16.4 >