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Increase MAX_PROPOSED_ALGO to 50, warn if exceeded

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This commit is contained in:
Matt Johnston 2020-10-23 20:53:58 +08:00
parent 34f24b1841
commit 1a208c460b
2 changed files with 4 additions and 4 deletions
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6
common-algo.c
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@ -381,7 +381,7 @@ static void get_algolist(char* algolist, unsigned int algolist_len,
}
if (algolist_len > MAX_PROPOSED_ALGO*(MAX_NAME_LEN+1)) {
*ret_count = 0;
}
}
/* ret_list will contain a list of the strings parsed out.
We will have at least one string (even if it's just "") */
@ -392,11 +392,11 @@ static void get_algolist(char* algolist, unsigned int algolist_len,
/* someone is trying something strange */
*ret_count = 0;
return;
}
}
if (algolist[i] == ',') {
if (*ret_count >= max_count) {
/* Too many */
dropbear_log(LOG_WARNING, "Too many remote algorithms");
*ret_count = 0;
return;
}

2
sysoptions.h
View File

@ -176,7 +176,7 @@ If you test it please contact the Dropbear author */
explicitly specified for all protocols (just
for algos) but seems valid */
#define MAX_PROPOSED_ALGO 20
#define MAX_PROPOSED_ALGO 50
/* size/count limits */
/* From transport rfc */