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-rw-r--r--src/asn1_str.cpp211
1 files changed, 211 insertions, 0 deletions
diff --git a/src/asn1_str.cpp b/src/asn1_str.cpp
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+++ b/src/asn1_str.cpp
@@ -0,0 +1,211 @@
+/*************************************************
+* Simple ASN.1 String Types Source File *
+* (C) 1999-2006 The Botan Project *
+*************************************************/
+
+#include <botan/asn1_obj.h>
+#include <botan/asn1_int.h>
+#include <botan/der_enc.h>
+#include <botan/ber_dec.h>
+#include <botan/charset.h>
+#include <botan/parsing.h>
+#include <botan/conf.h>
+
+namespace Botan {
+
+namespace {
+
+/*************************************************
+* Choose an encoding for the string *
+*************************************************/
+ASN1_Tag choose_encoding(const std::string& str)
+ {
+ static const byte IS_PRINTABLE[256] = {
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00,
+ 0x00, 0x01, 0x00, 0x01, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00 };
+
+ for(u32bit j = 0; j != str.size(); ++j)
+ if(!IS_PRINTABLE[(byte)str[j]])
+ {
+ const std::string type = Config::get_string("x509/ca/str_type");
+ if(type == "utf8") return UTF8_STRING;
+ if(type == "latin1") return T61_STRING;
+ throw Invalid_Argument("Bad setting for x509/ca/str_type: " + type);
+ }
+ return PRINTABLE_STRING;
+ }
+
+}
+
+/*************************************************
+* Check if type is a known ASN.1 string type *
+*************************************************/
+bool is_string_type(ASN1_Tag tag)
+ {
+ if(tag == NUMERIC_STRING || tag == PRINTABLE_STRING ||
+ tag == VISIBLE_STRING || tag == T61_STRING || tag == IA5_STRING ||
+ tag == UTF8_STRING || tag == BMP_STRING)
+ return true;
+ return false;
+ }
+
+/*************************************************
+* Create an ASN1_String *
+*************************************************/
+ASN1_String::ASN1_String(const std::string& str, ASN1_Tag t) : tag(t)
+ {
+ iso_8859_str = local2iso(str);
+ if(tag == DIRECTORY_STRING)
+ tag = choose_encoding(iso_8859_str);
+
+ if(tag != NUMERIC_STRING &&
+ tag != PRINTABLE_STRING &&
+ tag != VISIBLE_STRING &&
+ tag != T61_STRING &&
+ tag != IA5_STRING &&
+ tag != UTF8_STRING &&
+ tag != BMP_STRING)
+ throw Invalid_Argument("ASN1_String: Unknown string type " +
+ to_string(tag));
+ }
+
+/*************************************************
+* Create an ASN1_String *
+*************************************************/
+ASN1_String::ASN1_String(const std::string& str)
+ {
+ iso_8859_str = local2iso(str);
+ tag = choose_encoding(iso_8859_str);
+ }
+
+/*************************************************
+* Return this string in ISO 8859-1 encoding *
+*************************************************/
+std::string ASN1_String::iso_8859() const
+ {
+ return iso_8859_str;
+ }
+
+/*************************************************
+* Return this string in local encoding *
+*************************************************/
+std::string ASN1_String::value() const
+ {
+ return iso2local(iso_8859_str);
+ }
+
+/*************************************************
+* Return the type of this string object *
+*************************************************/
+ASN1_Tag ASN1_String::tagging() const
+ {
+ return tag;
+ }
+
+/*************************************************
+* DER encode an ASN1_String *
+*************************************************/
+void ASN1_String::encode_into(DER_Encoder& encoder) const
+ {
+ std::string value = iso_8859();
+ if(tagging() == UTF8_STRING)
+ value = iso2utf(value);
+ encoder.add_object(tagging(), UNIVERSAL, value);
+ }
+
+namespace DER {
+
+/*************************************************
+* DER encode an ASN1_String *
+*************************************************/
+void encode(DER_Encoder& encoder, const ASN1_String& string,
+ ASN1_Tag type_tag, ASN1_Tag class_tag)
+ {
+ if(string.tagging() == UTF8_STRING)
+ encoder.add_object(type_tag, class_tag, iso2utf(string.iso_8859()));
+ else
+ encoder.add_object(type_tag, class_tag, string.iso_8859());
+ }
+
+}
+
+namespace BER {
+
+namespace {
+
+/*************************************************
+* Do any UTF-8/Unicode decoding needed *
+*************************************************/
+std::string convert_string(BER_Object obj, ASN1_Tag type)
+ {
+ if(type == BMP_STRING)
+ {
+ if(obj.value.size() % 2 == 1)
+ throw BER_Decoding_Error("BMP STRING has an odd number of bytes");
+
+ std::string value;
+ for(u32bit j = 0; j != obj.value.size(); j += 2)
+ {
+ const byte c1 = obj.value[j];
+ const byte c2 = obj.value[j+1];
+
+ if(c1 != 0)
+ throw BER_Decoding_Error("BMP STRING has non-Latin1 characters");
+
+ value += (char)c2;
+ }
+ return iso2local(value);
+ }
+ else if(type == UTF8_STRING)
+ return iso2local(utf2iso(BER::to_string(obj)));
+ else
+ return iso2local(BER::to_string(obj));
+ }
+
+}
+
+/*************************************************
+* Decode a BER encoded ASN1_String *
+*************************************************/
+void decode(BER_Decoder& source, ASN1_String& string,
+ ASN1_Tag expected_tag, ASN1_Tag real_tag)
+ {
+ BER_Object obj = source.get_next_object();
+ if(obj.type_tag != expected_tag)
+ throw BER_Bad_Tag("Unexpected string tag", obj.type_tag);
+
+ string = ASN1_String(convert_string(obj, real_tag), real_tag);
+ }
+
+/*************************************************
+* Decode a BER encoded ASN1_String *
+*************************************************/
+void decode(BER_Decoder& source, ASN1_String& string)
+ {
+ BER_Object obj = source.get_next_object();
+ string = ASN1_String(convert_string(obj, obj.type_tag), obj.type_tag);
+ }
+
+}
+
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 05:05:06 +0000