--- /dev/null
+#define _POSIX_C_SOURCE 200809L
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "tlse.h"
+
+struct tls_uri {
+ char *scheme;
+ char *userinfo;
+ char *host;
+ char *port;
+ char *path;
+ char *query;
+ char *fragment;
+};
+int tls_parse_uri(char *, struct tls_uri *);
+void tls_free_uri(struct tls_uri *);
+
+int open_tcp_connection(char *host, int port);
+
+int verify(struct TLSContext *context, struct TLSCertificate **chain, int len) {
+ int i, err;
+
+ if (chain) {
+ for (i = 0; i < len; i++) {
+ struct TLSCertificate *certificate = chain[i];
+ // check validity date
+ err = tls_certificate_is_valid(certificate);
+ if (err)
+ return err;
+ // check certificate in certificate->bytes of length certificate->len
+ // the certificate is in ASN.1 DER format
+ }
+ }
+ // check if chain is valid
+ err = tls_certificate_chain_is_valid(chain, len);
+ if (err) {
+ return err;
+ }
+
+ if (len > 0 && context->sni) {
+ err = tls_certificate_valid_subject(chain[0], context->sni);
+ if (err) {
+ return err;
+ }
+ }
+
+ /* Perform certificate validation against ROOT CA */
+ err = tls_certificate_chain_is_valid_root(context, chain, len);
+ if (err) {
+ return err;
+ }
+
+ return no_error;
+}
+
+struct io {
+ struct tls_buffer response;
+ struct TLSContext *tls;
+ int socket;
+ int status_code;
+ time_t last_modified;
+ time_t date;
+ size_t content_length;
+ char *redirect;
+};
+
+int month(char *m) {
+ char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
+ "Aug", "Sep", "Oct", "Nov", "Dec" };
+ int i;
+
+ for (i=0; i < 12; i++) {
+ if (!strncasecmp(m, months[i], 3)) {
+ return i+1;
+ }
+ }
+ return 0;
+}
+
+/* Wed, 06 Feb 2019 10:06:05 GMT */
+time_t parse_date(char *d) {
+ //static const char format[] = "%a, %d %b %Y %H:%M:%S %Z"; // rfc 1123
+ struct tm tm = { 0 };
+ int rv;
+
+ //char *data = "Tue, 13 Dec 2011 16:08:21 GMT";
+ int h, m, s, dom, Y;
+ char M[4];
+ rv = sscanf(d, "%*[a-zA-Z,] %d %s %d %d:%d:%d", &dom, M, &Y, &h, &m, &s);
+ if (rv == 6) {
+ tm.tm_year = Y - 1900;
+ tm.tm_hour = h;
+ tm.tm_min = m;
+ tm.tm_sec = s;
+ tm.tm_mon = month(M)-1;
+ tm.tm_mday = dom;
+
+ return mktime(&tm);
+ }
+ return -1;
+}
+
+char *find_header(struct io *io, char *header, size_t *len) {
+ char *eoh, *soh;
+ size_t hlen;
+
+ *len = 0;
+
+ hlen = strlen(header);
+ eoh = strstr(io->response.buffer, "\r\n\r\n");
+ if (!eoh) {
+ return 0;
+ }
+ soh = io->response.buffer;
+ do {
+ soh = strstr(soh, "\r\n");
+ if (soh == eoh) {
+ break;
+ }
+ soh += 2;
+ if (!memcmp(soh, header, hlen)) {
+ break;
+ }
+ } while (soh < eoh);
+
+ if (soh >= eoh) {
+ return 0;
+ }
+ eoh = strstr(soh, "\r\n");
+ soh += hlen;
+ while (soh < eoh && isspace(*soh)) {
+ soh++;
+ }
+ *len = (eoh - soh);
+ return soh;
+}
+
+void parse_header(struct io *io) {
+ char *s = io->response.buffer;
+ int code = 0;
+ char *hval;
+ size_t hlen;
+
+ while (!isspace(*s)) {
+ s++;
+ }
+ while (isspace(*s)) {
+ s++;
+ }
+ code = strtol(s, 0, 10);
+ io->status_code = code;
+
+ hval = find_header(io, "Date:", &hlen);
+ if (hval) {
+ hval[hlen] = 0;
+ io->date = parse_date(hval);
+ hval[hlen] = '\r';
+ }
+ hval = find_header(io, "Last-Modified:", &hlen);
+ if (hval) {
+ hval[hlen] = 0;
+ io->last_modified = parse_date(hval);
+ hval[hlen] = '\r';
+ }
+
+ hval = find_header(io, "Content-Length:", &hlen);
+ if (hval) {
+ hval[hlen] = 0;
+ io->content_length = strtoul(hval, 0, 10);
+ hval[hlen] = '\r';
+ }
+
+ switch (code) {
+ case 301:
+ case 302:
+ case 303:
+ case 307:
+ hval = find_header(io, "Location:", &hlen);
+ if (hval) {
+ io->redirect = strndup(hval, hlen);
+ }
+ break;
+ default:
+ break;
+ }
+
+}
+
+ssize_t fill_buffer(struct io *io) {
+ unsigned char buffer[4096];
+ ssize_t ret;
+
+ if (io->tls) {
+ ret = tls_read(io->tls, buffer, sizeof buffer);
+ } else {
+ ret = read(io->socket, buffer, sizeof buffer);
+ }
+
+ if (ret > 0) {
+ tls_buffer_append(&io->response, buffer, ret);
+ }
+
+ return ret;
+}
+
+#if 0
+char *nextline(struct io *io) {
+ char *eol = 0;;
+
+ eol = memchr(io->response.buffer, '\n', io.response.size);
+ while (eol == 0) {
+ fill_buffer(io);
+ eol = memchr(io->response.buffer, '\n', io.response.size);
+ }
+ if (eol) {
+
+}
+#endif
+
+void append_header(struct tls_buffer *buf, char *header, char *val) {
+ tls_buffer_append(buf, header, strlen(header));
+ tls_buffer_append(buf, ": ", 2);
+ tls_buffer_append(buf, val, strlen(val));
+ tls_buffer_append(buf, "\r\n", 2);
+}
+
+static void pdots(int len, int ch, unsigned long was, unsigned long now,
+ unsigned long total) {
+ was = len * was / total;
+ if (now > total) {
+ now = total;
+ }
+ now = len * now / total;
+ while (was++ < now) {
+ putc(ch,stderr);
+ }
+}
+
+int main(int ac, char *av[]) {
+ int sockfd, port = -1, rv;
+ ssize_t ret;
+ int option;
+#if 0
+ char msg[] = "GET %s HTTP/1.1\r\nHost: %s:%i\r\nConnection: close\r\n\r\n";
+ char msg2[] = "GET %s HTTP/1.1\r\nHost: %s:%i\r\nLast-Modified: %s\r\nConnection: close\r\n\r\n";
+ char msg_buffer[1024];
+#endif
+ char *req_file = 0;
+ char *host = 0;
+ struct tls_uri uri;
+ char *outfile = 0;
+ int raw = 0, head = 0;
+ int out = 1;
+ int use_tls = 0;
+ struct io io = { {0}, 0, -1, 0, 0, 0, 0, 0 };
+ struct TLSContext *clientssl = 0;
+ int failsilent = 0;
+ char *lmfile = 0;
+ int progressbar = 0;
+ struct tls_buffer request;
+ char lmtime[80];
+ char *eoh = 0;
+ size_t total = 0;
+ size_t header_len;
+ char *url = 0;
+ int redirs = 0, redirlimit = 50, printstatus = 0;
+
+ ltc_mp = tfm_desc;
+
+ while ((option = getopt(ac, av, "o:rIfz:#R:S")) != -1) {
+ switch (option) {
+ case 'o': outfile = optarg; break;
+ case 'S': printstatus = 1; head = 1; break;
+ case 'I': head = 1;
+ case 'r': raw = 1; break;
+ case 'f': failsilent = 1; break;
+ case 'z': lmfile = optarg; break;
+ case 'R': redirlimit = strtol(optarg, 0, 10); break;
+ case '#': progressbar = 1; break;
+ default:
+ exit(EXIT_FAILURE);
+ break;
+ }
+ }
+
+ if (ac < optind) {
+ fprintf(stderr, "Usage: %s uri\n", av[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ if (lmfile) {
+ struct stat st;
+ int rv;
+ struct tm *mtime;
+ time_t ts;
+
+ rv = stat(lmfile, &st);
+ if (rv == -1) {
+ perror("stat failed:");
+ exit(EXIT_FAILURE);
+ }
+ ts = st.st_mtime;
+ mtime = gmtime(&ts);
+ strftime(lmtime, sizeof lmtime, "%a, %d %b %Y %H:%M:%S GMT", mtime);
+ }
+
+ url = strdup(av[optind]);
+ if (!url) {
+ exit(EXIT_FAILURE);
+ }
+
+ if (outfile) {
+ out = open(outfile, O_WRONLY|O_CREAT, 0600);
+ if (out == -1) {
+ perror("can't open output file:");
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ signal(SIGPIPE, SIG_IGN);
+
+ tls_buffer_init(&io.response, 0);
+ tls_buffer_init(&request, 128);
+
+ while (redirs++ <= redirlimit) {
+ tls_free_uri(&uri);
+ io.response.len = 0;
+ request.len = 0;
+
+ tls_parse_uri(url, &uri);
+ host = uri.host;
+ port = atoi(uri.port);
+ req_file = uri.path;
+
+ /* construct request */
+ if (head) {
+ tls_buffer_append(&request, "HEAD ", 5);
+ } else {
+ tls_buffer_append(&request, "GET ", 4);
+ }
+ tls_buffer_append(&request, uri.path, strlen(uri.path));
+ tls_buffer_append(&request, " HTTP/1.1", 9);
+ tls_buffer_append(&request, "\r\n", 2);
+
+ append_header(&request, "Host", host);
+ append_header(&request, "Connection", "close");
+ if (lmfile) {
+ append_header(&request, "If-Modified-Since", lmtime);
+ }
+ tls_buffer_append(&request, "\r\n", 2);
+ //fprintf(stderr, "msg =\n%.*s", (int)request.len, request.buffer);
+
+ if (!strcmp(uri.scheme, "https")) {
+ use_tls = 1;
+
+ clientssl = tls_create_context(TLS_CLIENT, TLS_V12);
+
+ rv = tls_load_root_file(clientssl, "root.pem");
+ if (rv == -1) {
+ fprintf(stderr, "Error loading root certs\n");
+ return 1;
+ }
+
+ /* optionally, we can set a certificate validation
+ * callback function if set_verify is not called, and
+ * root ca is set, `tls_default_verify` will be used
+ * (does exactly what `verify` does in this example)
+ */
+ tls_set_verify(clientssl, verify);
+
+ if (!clientssl) {
+ fprintf(stderr, "Error initializing client context\n");
+ return -1;
+ }
+ tls_sni_set(clientssl, uri.host);
+ clientssl->sync = 1;
+ io.tls = clientssl;
+ }
+
+ sockfd = open_tcp_connection(host, port);
+ io.socket = sockfd;
+
+ if (sockfd < 0) {
+ exit(EXIT_FAILURE);
+ }
+
+ if (use_tls) {
+ tls_set_fd(clientssl, sockfd);
+
+ if ((rv = tls_connect(clientssl)) != 1) {
+ fprintf(stderr, "Handshake Error %i\n", rv);
+ return -5;
+ }
+
+ ret = tls_write(clientssl, request.buffer, request.len);
+ } else {
+ ret = write(io.socket, request.buffer, request.len);
+ }
+
+ if (ret < 0) {
+ fprintf(stderr, "write error %zd\n", ret);
+ return -6;
+ }
+
+ do {
+ ret = fill_buffer(&io);
+ if (ret < 0) {
+ break;
+ }
+ eoh = strstr(io.response.buffer, "\r\n\r\n");
+ if (ret == 0) {
+ break;
+ }
+ } while (!eoh);
+
+ if (!eoh) {
+ /* never got (complet) header */
+ fprintf(stderr, "incomplete response to %s\n", av[optind]);
+ exit(EXIT_FAILURE);
+ }
+
+ header_len = (size_t)(eoh - io.response.buffer) + 4;
+ parse_header(&io);
+
+ switch (io.status_code) {
+ case 301:
+ case 302:
+ case 303:
+ case 307:
+ free(url);
+ url = strdup(io.redirect);
+ continue;
+ break;
+ }
+
+ if (printstatus) {
+ printf("%d\n", io.status_code);
+ break;
+ }
+
+ if (io.status_code != 200) {
+ break;
+ }
+
+ if (!raw) {
+ tls_buffer_shift(&io.response, header_len);
+ }
+ if (head) {
+ io.response.len -= 2;
+ }
+
+ if (progressbar) {
+ if (io.content_length) {
+ fprintf(stderr, "(%lu) ", io.content_length);
+ }
+ }
+
+ do {
+ write(out, io.response.buffer, io.response.len);
+ ret = io.response.len;
+ io.response.len = 0;
+
+ if (progressbar) {
+ if (io.content_length) {
+ pdots(50, '.', total, total+ret,
+ io.content_length);
+ } else {
+ int old = total / 1000000;
+ int new = (total+ret)/1000000;
+ while (old < new) {
+ putc('.',stderr);
+ }
+ }
+ total += ret;
+ }
+ ret = fill_buffer(&io);
+ } while (ret > 0);
+
+ if (ret < 0) {
+ fprintf(stderr, "%s read error %zd\n", uri.scheme, ret);
+ }
+ /* futimens(out, ...) */
+ close(out);
+ tls_buffer_free(&io.response);
+ break;
+ }
+
+ if (use_tls) {
+ tls_shutdown(clientssl);
+ tls_free(clientssl);
+ }
+
+ close(sockfd);
+ if (progressbar && io.status_code == 200) {
+ fprintf(stderr, "(%lu)", total);
+ putc('\n',stderr);
+ }
+
+ return io.status_code == 200 ? 0 : EXIT_FAILURE;
+}
projects / zpackage / blobdiff