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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /comm/third_party/libotr/toolkit/readotr.c | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'comm/third_party/libotr/toolkit/readotr.c')
-rw-r--r-- | comm/third_party/libotr/toolkit/readotr.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/comm/third_party/libotr/toolkit/readotr.c b/comm/third_party/libotr/toolkit/readotr.c new file mode 100644 index 0000000000..77ffcbb6a6 --- /dev/null +++ b/comm/third_party/libotr/toolkit/readotr.c @@ -0,0 +1,91 @@ +/* + * Off-the-Record Messaging Toolkit + * Copyright (C) 2004-2012 Ian Goldberg, Chris Alexander, Nikita Borisov + * <otr@cypherpunks.ca> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* system headers */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +typedef struct { + char *data; + size_t len; + size_t alloclen; +} Buffer; + +static void buf_new(Buffer *bufp) +{ + bufp->data = NULL; + bufp->len = 0; + bufp->alloclen = 0; +} + +static void buf_put(Buffer *bufp, const char *str, size_t len) +{ + while (bufp->len + len + 1 > bufp->alloclen) { + char *newdata = realloc(bufp->data, bufp->alloclen + 1024); + if (!newdata) { + fprintf(stderr, "Out of memory!\n"); + exit(1); + } + bufp->data = newdata; + bufp->alloclen += 1024; + } + memmove(bufp->data + bufp->len, str, len); + bufp->len += len; + bufp->data[bufp->len] = '\0'; +} + +static void buf_putc(Buffer *bufp, char c) +{ + buf_put(bufp, &c, 1); +} + +/* Read from the given stream until we see a complete OTR Key Exchange + * or OTR Data message. Return a newly-allocated pointer to a copy of + * this message, which the caller should free(). Returns NULL if no + * such message could be found. */ +char *readotr(FILE *stream) +{ + int seen = 0; + const char header[] = "?OTR:"; /* There are no '?' chars other than + the leading one */ + int headerlen = strlen(header); + Buffer buf; + + while(seen < headerlen) { + int c = fgetc(stream); + if (c == EOF) return NULL; + else if (c == header[seen]) seen++; + else if (c == header[0]) seen = 1; + else seen = 0; + } + + buf_new(&buf); + buf_put(&buf, header, headerlen); + + /* Look for the trailing '.' */ + while(1) { + int c = fgetc(stream); + if (c == EOF) break; + buf_putc(&buf, c); + if (c == '.') break; + } + + return buf.data; +} |