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crypto: tools - Add cryptostat userspace
This patch adds an userspace tool for displaying kernel crypto API statistics. Signed-off-by: Corentin Labbe <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
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/* Heavily copied from libkcapi 2015 - 2017, Stephan Mueller <[email protected]> */ | ||
#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> | ||
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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) | ||
{ | ||
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; | ||
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memset(&req, 0, sizeof(req)); | ||
memset(&buf, 0, sizeof(buf)); | ||
memset(&msg, 0, sizeof(msg)); | ||
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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); | ||
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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); | ||
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; | ||
} | ||
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/* 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; | ||
} | ||
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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; | ||
} | ||
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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; | ||
} | ||
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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; | ||
} | ||
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if (!cru_res) { | ||
ret = -EFAULT; | ||
printf("Netlink error: no cru_res\n"); | ||
goto out; | ||
} | ||
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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; | ||
} | ||
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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; | ||
} | ||
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int main(int argc, const char *argv[]) | ||
{ | ||
char buf[4096]; | ||
FILE *procfd; | ||
int i, lastspace; | ||
int ret; | ||
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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; | ||
} | ||
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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; | ||
} |