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Some minor improvements to passphrase_to_key().

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git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@553 7dcaeef0-15fb-0310-b436-a5af3365683c
This commit is contained in:
Andreas Schneider
2009-04-18 15:15:45 +00:00
parent 163fbfa44d
commit 5ef5841f99
1 changed files with 21 additions and 13 deletions
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26
libssh/keyfiles.c
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@@ -190,28 +190,36 @@ static int read_line(char *data, unsigned int len, FILE *fp) {
static int passphrase_to_key(char *data, unsigned int datalen,
unsigned char *salt, unsigned char *key, unsigned int keylen) {
MD5CTX md;
unsigned char digest[MD5_DIGEST_LEN];
unsigned char digest[MD5_DIGEST_LEN] = {0};
unsigned int i;
unsigned int j;
unsigned int md_not_empty;
for (j=0,md_not_empty=0;j<keylen;)
{
for (j = 0, md_not_empty = 0; j < keylen; ) {
md = md5_init();
if (!md)
if (md == NULL) {
return 0;
if (md_not_empty)
}
if (md_not_empty) {
md5_update(md, digest, MD5_DIGEST_LEN);
else
} else {
md_not_empty = 1;
}
md5_update(md, data, datalen);
if (salt)
if (salt) {
md5_update(md, salt, PKCS5_SALT_LEN);
}
md5_final(digest, md);
for (i = 0; j < keylen && i < MD5_DIGEST_LEN; j++, i++)
if (key)
for (i = 0; j < keylen && i < MD5_DIGEST_LEN; j++, i++) {
if (key) {
key[j] = digest[i];
}
}
}
return 1;
}