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Merge pull request #151 from HansH111/pubkeyinfo

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Matt Johnston 2022-03-16 10:43:24 +08:00 committed by GitHub
commit 355b248318
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 30 additions and 3 deletions
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1
auth.h
View File

@ -125,6 +125,7 @@ struct AuthState {
char *pw_passwd;
#if DROPBEAR_SVR_PUBKEY_OPTIONS_BUILT
struct PubKeyOptions* pubkey_options;
char *pubkey_info;
#endif
};

26
svr-authpubkey.c
View File

@ -261,7 +261,7 @@ static int checkpubkey_line(buffer* line, int line_num, const char* filename,
const char* algo, unsigned int algolen,
const unsigned char* keyblob, unsigned int keybloblen) {
buffer *options_buf = NULL;
unsigned int pos, len;
unsigned int pos, len, infopos, infolen;
int ret = DROPBEAR_FAILURE;
if (line->len < MIN_AUTHKEYS_LINE || line->len > MAX_AUTHKEYS_LINE) {
@ -344,6 +344,11 @@ static int checkpubkey_line(buffer* line, int line_num, const char* filename,
for (len = 0; line->pos < line->len; len++) {
if (buf_getbyte(line) == ' ') break;
}
/* findout the length of the public key info */
infopos = line->pos;
for (infolen = 0; line->pos < line->len; infolen++) {
if (buf_getbyte(line) == ' ') break;
}
buf_setpos(line, pos);
buf_setlen(line, line->pos + len);
@ -351,8 +356,23 @@ static int checkpubkey_line(buffer* line, int line_num, const char* filename,
ret = cmp_base64_key(keyblob, keybloblen, (const unsigned char *) algo, algolen, line, NULL);
if (ret == DROPBEAR_SUCCESS && options_buf) {
ret = svr_add_pubkey_options(options_buf, line_num, filename);
/* free pubkey_info if it is filled */
if (ses.authstate.pubkey_info) {
m_free(ses.authstate.pubkey_info);
ses.authstate.pubkey_info = NULL;
}
if (ret == DROPBEAR_SUCCESS) {
if (options_buf) {
ret = svr_add_pubkey_options(options_buf, line_num, filename);
}
/* save the (optional) public key information */
if (infolen) {
ses.authstate.pubkey_info = m_malloc(infolen + 1);
if (ses.authstate.pubkey_info) {
strncpy(ses.authstate.pubkey_info,(const char *) buf_getptr(line, infopos), infolen);
ses.authstate.pubkey_info[infolen]='\0';
}
}
}
out:

3
svr-authpubkeyoptions.c
View File

@ -115,6 +115,9 @@ void svr_pubkey_options_cleanup() {
}
m_free(ses.authstate.pubkey_options);
}
if (ses.authstate.pubkey_info) {
m_free(ses.authstate.pubkey_info);
}
}
/* helper for svr_add_pubkey_options. returns DROPBEAR_SUCCESS if the option is matched,

3
svr-chansession.c
View File

@ -1030,6 +1030,9 @@ static void execchild(const void *user_data) {
if (chansess->original_command) {
addnewvar("SSH_ORIGINAL_COMMAND", chansess->original_command);
}
if (ses.authstate.pubkey_info != NULL) {
addnewvar("SSH_PUBKEYINFO", ses.authstate.pubkey_info);
}
/* change directory */
if (chdir(ses.authstate.pw_dir) < 0) {