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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include "cadigest.h"
#include "util.h"
int main(int argc, char *argv[]) {
CaDigest *digest = NULL;
CaDigestType type;
int fd = -1, r;
const char *q, *path, *dt;
size_t l;
char *p = NULL;
if (argc > 3) {
log_error("Expected a two arguments: digest and file name.");
r = -EINVAL;
goto finish;
}
path = argc == 3 ? argv[2] : NULL;
dt = argc >= 2 ? argv[1] : NULL;
if (dt) {
type = ca_digest_type_from_string(dt);
if (type < 0) {
log_error("Failed to parse digest name: %s", dt);
r = -EINVAL;
goto finish;
}
} else
type = CA_DIGEST_SHA512_256;
r = ca_digest_new(type, &digest);
if (r < 0) {
log_error("Failed to set up digest %s: %m", dt);
goto finish;
}
if (path) {
fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY);
if (fd < 0) {
log_error_errno(errno, "Failed to open %s: %m", path);
goto finish;
}
} else
fd = STDIN_FILENO;
for (;;) {
uint8_t buffer[64*1024];
ssize_t n;
n = read(fd, buffer, sizeof(buffer));
if (n < 0) {
log_error_errno(errno, "Failed to read: %m");
goto finish;
}
if (n == 0) /* EOF */
break;
ca_digest_write(digest, buffer, (size_t) n);
}
q = ca_digest_read(digest);
l = ca_digest_get_size(digest);
p = hexmem(q, l);
if (!p) {
r = log_oom();
goto finish;
}
fputs(p, stdout);
fputc('\n', stdout);
r = 0;
finish:
ca_digest_free(digest);
if (fd > 2)
safe_close(fd);
free(p);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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