xref: /openssl/crypto/asn1/a_print.c (revision a8d9bd81)
1 /*
2  * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the Apache License 2.0 (the "License").  You may not use
5  * this file except in compliance with the License.  You can obtain a copy
6  * in the file LICENSE in the source distribution or at
7  * https://www.openssl.org/source/license.html
8  */
9 
10 #include <stdio.h>
11 #include "crypto/ctype.h"
12 #include "internal/cryptlib.h"
13 #include <openssl/asn1.h>
14 
ASN1_PRINTABLE_type(const unsigned char * s,int len)15 int ASN1_PRINTABLE_type(const unsigned char *s, int len)
16 {
17     int c;
18     int ia5 = 0;
19     int t61 = 0;
20 
21     if (s == NULL)
22         return V_ASN1_PRINTABLESTRING;
23 
24     if (len < 0)
25         len = strlen((const char *)s);
26 
27     while (len-- > 0) {
28         c = *(s++);
29         if (!ossl_isasn1print(c))
30             ia5 = 1;
31         if (!ossl_isascii(c))
32             t61 = 1;
33     }
34     if (t61)
35         return V_ASN1_T61STRING;
36     if (ia5)
37         return V_ASN1_IA5STRING;
38     return V_ASN1_PRINTABLESTRING;
39 }
40 
ASN1_UNIVERSALSTRING_to_string(ASN1_UNIVERSALSTRING * s)41 int ASN1_UNIVERSALSTRING_to_string(ASN1_UNIVERSALSTRING *s)
42 {
43     int i;
44     unsigned char *p;
45 
46     if (s->type != V_ASN1_UNIVERSALSTRING)
47         return 0;
48     if ((s->length % 4) != 0)
49         return 0;
50     p = s->data;
51     for (i = 0; i < s->length; i += 4) {
52         if ((p[0] != '\0') || (p[1] != '\0') || (p[2] != '\0'))
53             break;
54         else
55             p += 4;
56     }
57     if (i < s->length)
58         return 0;
59     p = s->data;
60     for (i = 3; i < s->length; i += 4) {
61         *(p++) = s->data[i];
62     }
63     *(p) = '\0';
64     s->length /= 4;
65     s->type = ASN1_PRINTABLE_type(s->data, s->length);
66     return 1;
67 }
68 
ASN1_STRING_print(BIO * bp,const ASN1_STRING * v)69 int ASN1_STRING_print(BIO *bp, const ASN1_STRING *v)
70 {
71     int i, n;
72     char buf[80];
73     const char *p;
74 
75     if (v == NULL)
76         return 0;
77     n = 0;
78     p = (const char *)v->data;
79     for (i = 0; i < v->length; i++) {
80         if ((p[i] > '~') || ((p[i] < ' ') &&
81                              (p[i] != '\n') && (p[i] != '\r')))
82             buf[n] = '.';
83         else
84             buf[n] = p[i];
85         n++;
86         if (n >= 80) {
87             if (BIO_write(bp, buf, n) <= 0)
88                 return 0;
89             n = 0;
90         }
91     }
92     if (n > 0)
93         if (BIO_write(bp, buf, n) <= 0)
94             return 0;
95     return 1;
96 }
97