1 // Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <openssl/asn1.h>
16
17 #include <openssl/bio.h>
18
i2a_ASN1_STRING(BIO * bp,const ASN1_STRING * a,int type)19 int i2a_ASN1_STRING(BIO *bp, const ASN1_STRING *a, int type) {
20 int i, n = 0;
21 static const char *h = "0123456789ABCDEF";
22 char buf[2];
23
24 if (a == NULL) {
25 return 0;
26 }
27
28 if (a->length == 0) {
29 if (BIO_write(bp, "0", 1) != 1) {
30 goto err;
31 }
32 n = 1;
33 } else {
34 for (i = 0; i < a->length; i++) {
35 if ((i != 0) && (i % 35 == 0)) {
36 if (BIO_write(bp, "\\\n", 2) != 2) {
37 goto err;
38 }
39 n += 2;
40 }
41 buf[0] = h[((unsigned char)a->data[i] >> 4) & 0x0f];
42 buf[1] = h[((unsigned char)a->data[i]) & 0x0f];
43 if (BIO_write(bp, buf, 2) != 2) {
44 goto err;
45 }
46 n += 2;
47 }
48 }
49 return n;
50 err:
51 return -1;
52 }
53