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clear hash state memory after use

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This commit is contained in:
Matt Johnston 2015-01-04 23:10:59 +08:00
parent eabd9f5e60
commit b24984deb3
1 changed files with 3 additions and 2 deletions
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5
common-kex.c
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@ -303,7 +303,7 @@ static void hashkeys(unsigned char *out, unsigned int outlen,
hash_desc->done(&hs2, tmpout);
memcpy(&out[offset], tmpout, MIN(outlen - offset, hash_desc->hashsize));
}
m_burn(&hs2, sizeof(hash_state));
}
/* Generate the actual encryption/integrity keys, using the results of the
@ -403,6 +403,7 @@ static void gen_new_keys() {
m_burn(C2S_key, sizeof(C2S_key));
m_burn(S2C_IV, sizeof(S2C_IV));
m_burn(S2C_key, sizeof(S2C_key));
m_burn(&hs, sizeof(hash_state));
TRACE(("leave gen_new_keys"))
}
@ -798,6 +799,7 @@ static void finish_kexhashbuf(void) {
buf_burn(ses.kexhashbuf);
buf_free(ses.kexhashbuf);
m_burn(&hs, sizeof(hash_state));
ses.kexhashbuf = NULL;
/* first time around, we set the session_id to H */
@ -805,7 +807,6 @@ static void finish_kexhashbuf(void) {
/* create the session_id, this never needs freeing */
ses.session_id = buf_newcopy(ses.hash);
}
}
/* read the other side's algo list. buf_match_algo is a callback to match