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libgcrypt: follow-up for ssh-dss padding fix

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Signed-off-by: Simon Josefsson <simon@josefsson.org>
This commit is contained in:
Kamil Dudka 2009-12-06 14:32:32 +01:00 committed by Simon Josefsson
parent f2e5b49904
commit 1f91ab049f
1 changed files with 22 additions and 2 deletions
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24
src/libgcrypt.c
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@ -435,7 +435,17 @@ _libssh2_dsa_sha1_sign(libssh2_dsa_ctx * dsactx,
}
tmp = gcry_sexp_nth_data(data, 1, &size);
if (!tmp || size < 1 || size > 20) {
if (!tmp) {
ret = -1;
goto out;
}
if (tmp[0] == '\0') {
tmp++;
size--;
}
if (size < 1 || size > 20) {
ret = -1;
goto out;
}
@ -453,7 +463,17 @@ _libssh2_dsa_sha1_sign(libssh2_dsa_ctx * dsactx,
}
tmp = gcry_sexp_nth_data(data, 1, &size);
if (!tmp || size < 1 || size > 20) {
if (!tmp) {
ret = -1;
goto out;
}
if (tmp[0] == '\0') {
tmp++;
size--;
}
if (size < 1 || size > 20) {
ret = -1;
goto out;
}