diff options
| -rw-r--r-- | sys/src/libsec/port/x509.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/sys/src/libsec/port/x509.c b/sys/src/libsec/port/x509.c index 1555210f3..20cfb9a8a 100644 --- a/sys/src/libsec/port/x509.c +++ b/sys/src/libsec/port/x509.c @@ -2129,8 +2129,12 @@ asn1mpint(Elem *e) if(is_int(e, &v)) return itomp(v, nil); - if(is_bigint(e, &b)) - return betomp(b->data, b->len, nil); + if(is_bigint(e, &b)){ + mpint *s = betomp(b->data, b->len, nil); + if(b->len > 0 && (b->data[0] & 0x80) != 0) + mpxtend(s, b->len*8, s); + return s; + } return nil; } @@ -2466,7 +2470,15 @@ mkbigint(mpint *p) e.tag.num = INTEGER; e.val.tag = VBigInt; e.val.u.bigintval = newbytes((mpsignif(p)+8)/8); - mptober(p, e.val.u.bigintval->data, e.val.u.bigintval->len); + if(p->sign < 0){ + mpint *s = mpnew(e.val.u.bigintval->len*8+1); + mpleft(mpone, e.val.u.bigintval->len*8, s); + mpadd(p, s, s); + mptober(s, e.val.u.bigintval->data, e.val.u.bigintval->len); + mpfree(s); + } else { + mptober(p, e.val.u.bigintval->data, e.val.u.bigintval->len); + } return e; } |