diff options
Diffstat (limited to 'openssl/crypto/asn1/a_strex.c')
| -rw-r--r-- | openssl/crypto/asn1/a_strex.c | 574 |
1 files changed, 574 insertions, 0 deletions
diff --git a/openssl/crypto/asn1/a_strex.c b/openssl/crypto/asn1/a_strex.c new file mode 100644 index 00000000..264ebf23 --- /dev/null +++ b/openssl/crypto/asn1/a_strex.c @@ -0,0 +1,574 @@ +/* a_strex.c */ +/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL + * project 2000. + */ +/* ==================================================================== + * Copyright (c) 2000 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * licensing@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include <stdio.h> +#include <string.h> +#include "cryptlib.h" +#include <openssl/crypto.h> +#include <openssl/x509.h> +#include <openssl/asn1.h> + +#include "charmap.h" + +/* ASN1_STRING_print_ex() and X509_NAME_print_ex(). + * Enhanced string and name printing routines handling + * multibyte characters, RFC2253 and a host of other + * options. + */ + + +#define CHARTYPE_BS_ESC (ASN1_STRFLGS_ESC_2253 | CHARTYPE_FIRST_ESC_2253 | CHARTYPE_LAST_ESC_2253) + +#define ESC_FLAGS (ASN1_STRFLGS_ESC_2253 | \ + ASN1_STRFLGS_ESC_QUOTE | \ + ASN1_STRFLGS_ESC_CTRL | \ + ASN1_STRFLGS_ESC_MSB) + + +/* Three IO functions for sending data to memory, a BIO and + * and a FILE pointer. + */ +#if 0 /* never used */ +static int send_mem_chars(void *arg, const void *buf, int len) +{ + unsigned char **out = arg; + if(!out) return 1; + memcpy(*out, buf, len); + *out += len; + return 1; +} +#endif + +static int send_bio_chars(void *arg, const void *buf, int len) +{ + if(!arg) return 1; + if(BIO_write(arg, buf, len) != len) return 0; + return 1; +} + +static int send_fp_chars(void *arg, const void *buf, int len) +{ + if(!arg) return 1; + if(fwrite(buf, 1, len, arg) != (unsigned int)len) return 0; + return 1; +} + +typedef int char_io(void *arg, const void *buf, int len); + +/* This function handles display of + * strings, one character at a time. + * It is passed an unsigned long for each + * character because it could come from 2 or even + * 4 byte forms. + */ + +static int do_esc_char(unsigned long c, unsigned char flags, char *do_quotes, char_io *io_ch, void *arg) +{ + unsigned char chflgs, chtmp; + char tmphex[HEX_SIZE(long)+3]; + + if(c > 0xffffffffL) + return -1; + if(c > 0xffff) { + BIO_snprintf(tmphex, sizeof tmphex, "\\W%08lX", c); + if(!io_ch(arg, tmphex, 10)) return -1; + return 10; + } + if(c > 0xff) { + BIO_snprintf(tmphex, sizeof tmphex, "\\U%04lX", c); + if(!io_ch(arg, tmphex, 6)) return -1; + return 6; + } + chtmp = (unsigned char)c; + if(chtmp > 0x7f) chflgs = flags & ASN1_STRFLGS_ESC_MSB; + else chflgs = char_type[chtmp] & flags; + if(chflgs & CHARTYPE_BS_ESC) { + /* If we don't escape with quotes, signal we need quotes */ + if(chflgs & ASN1_STRFLGS_ESC_QUOTE) { + if(do_quotes) *do_quotes = 1; + if(!io_ch(arg, &chtmp, 1)) return -1; + return 1; + } + if(!io_ch(arg, "\\", 1)) return -1; + if(!io_ch(arg, &chtmp, 1)) return -1; + return 2; + } + if(chflgs & (ASN1_STRFLGS_ESC_CTRL|ASN1_STRFLGS_ESC_MSB)) { + BIO_snprintf(tmphex, 11, "\\%02X", chtmp); + if(!io_ch(arg, tmphex, 3)) return -1; + return 3; + } + /* If we get this far and do any escaping at all must escape + * the escape character itself: backslash. + */ + if (chtmp == '\\' && flags & ESC_FLAGS) { + if(!io_ch(arg, "\\\\", 2)) return -1; + return 2; + } + if(!io_ch(arg, &chtmp, 1)) return -1; + return 1; +} + +#define BUF_TYPE_WIDTH_MASK 0x7 +#define BUF_TYPE_CONVUTF8 0x8 + +/* This function sends each character in a buffer to + * do_esc_char(). It interprets the content formats + * and converts to or from UTF8 as appropriate. + */ + +static int do_buf(unsigned char *buf, int buflen, + int type, unsigned char flags, char *quotes, char_io *io_ch, void *arg) +{ + int i, outlen, len; + unsigned char orflags, *p, *q; + unsigned long c; + p = buf; + q = buf + buflen; + outlen = 0; + while(p != q) { + if(p == buf && flags & ASN1_STRFLGS_ESC_2253) orflags = CHARTYPE_FIRST_ESC_2253; + else orflags = 0; + switch(type & BUF_TYPE_WIDTH_MASK) { + case 4: + c = ((unsigned long)*p++) << 24; + c |= ((unsigned long)*p++) << 16; + c |= ((unsigned long)*p++) << 8; + c |= *p++; + break; + + case 2: + c = ((unsigned long)*p++) << 8; + c |= *p++; + break; + + case 1: + c = *p++; + break; + + case 0: + i = UTF8_getc(p, buflen, &c); + if(i < 0) return -1; /* Invalid UTF8String */ + p += i; + break; + default: + return -1; /* invalid width */ + } + if (p == q && flags & ASN1_STRFLGS_ESC_2253) orflags = CHARTYPE_LAST_ESC_2253; + if(type & BUF_TYPE_CONVUTF8) { + unsigned char utfbuf[6]; + int utflen; + utflen = UTF8_putc(utfbuf, sizeof utfbuf, c); + for(i = 0; i < utflen; i++) { + /* We don't need to worry about setting orflags correctly + * because if utflen==1 its value will be correct anyway + * otherwise each character will be > 0x7f and so the + * character will never be escaped on first and last. + */ + len = do_esc_char(utfbuf[i], (unsigned char)(flags | orflags), quotes, io_ch, arg); + if(len < 0) return -1; + outlen += len; + } + } else { + len = do_esc_char(c, (unsigned char)(flags | orflags), quotes, io_ch, arg); + if(len < 0) return -1; + outlen += len; + } + } + return outlen; +} + +/* This function hex dumps a buffer of characters */ + +static int do_hex_dump(char_io *io_ch, void *arg, unsigned char *buf, int buflen) +{ + static const char hexdig[] = "0123456789ABCDEF"; + unsigned char *p, *q; + char hextmp[2]; + if(arg) { + p = buf; + q = buf + buflen; + while(p != q) { + hextmp[0] = hexdig[*p >> 4]; + hextmp[1] = hexdig[*p & 0xf]; + if(!io_ch(arg, hextmp, 2)) return -1; + p++; + } + } + return buflen << 1; +} + +/* "dump" a string. This is done when the type is unknown, + * or the flags request it. We can either dump the content + * octets or the entire DER encoding. This uses the RFC2253 + * #01234 format. + */ + +static int do_dump(unsigned long lflags, char_io *io_ch, void *arg, ASN1_STRING *str) +{ + /* Placing the ASN1_STRING in a temp ASN1_TYPE allows + * the DER encoding to readily obtained + */ + ASN1_TYPE t; + unsigned char *der_buf, *p; + int outlen, der_len; + + if(!io_ch(arg, "#", 1)) return -1; + /* If we don't dump DER encoding just dump content octets */ + if(!(lflags & ASN1_STRFLGS_DUMP_DER)) { + outlen = do_hex_dump(io_ch, arg, str->data, str->length); + if(outlen < 0) return -1; + return outlen + 1; + } + t.type = str->type; + t.value.ptr = (char *)str; + der_len = i2d_ASN1_TYPE(&t, NULL); + der_buf = OPENSSL_malloc(der_len); + if(!der_buf) return -1; + p = der_buf; + i2d_ASN1_TYPE(&t, &p); + outlen = do_hex_dump(io_ch, arg, der_buf, der_len); + OPENSSL_free(der_buf); + if(outlen < 0) return -1; + return outlen + 1; +} + +/* Lookup table to convert tags to character widths, + * 0 = UTF8 encoded, -1 is used for non string types + * otherwise it is the number of bytes per character + */ + +static const signed char tag2nbyte[] = { + -1, -1, -1, -1, -1, /* 0-4 */ + -1, -1, -1, -1, -1, /* 5-9 */ + -1, -1, 0, -1, /* 10-13 */ + -1, -1, -1, -1, /* 15-17 */ + -1, 1, 1, /* 18-20 */ + -1, 1, 1, 1, /* 21-24 */ + -1, 1, -1, /* 25-27 */ + 4, -1, 2 /* 28-30 */ +}; + +/* This is the main function, print out an + * ASN1_STRING taking note of various escape + * and display options. Returns number of + * characters written or -1 if an error + * occurred. + */ + +static int do_print_ex(char_io *io_ch, void *arg, unsigned long lflags, ASN1_STRING *str) +{ + int outlen, len; + int type; + char quotes; + unsigned char flags; + quotes = 0; + /* Keep a copy of escape flags */ + flags = (unsigned char)(lflags & ESC_FLAGS); + + type = str->type; + + outlen = 0; + + + if(lflags & ASN1_STRFLGS_SHOW_TYPE) { + const char *tagname; + tagname = ASN1_tag2str(type); + outlen += strlen(tagname); + if(!io_ch(arg, tagname, outlen) || !io_ch(arg, ":", 1)) return -1; + outlen++; + } + + /* Decide what to do with type, either dump content or display it */ + + /* Dump everything */ + if(lflags & ASN1_STRFLGS_DUMP_ALL) type = -1; + /* Ignore the string type */ + else if(lflags & ASN1_STRFLGS_IGNORE_TYPE) type = 1; + else { + /* Else determine width based on type */ + if((type > 0) && (type < 31)) type = tag2nbyte[type]; + else type = -1; + if((type == -1) && !(lflags & ASN1_STRFLGS_DUMP_UNKNOWN)) type = 1; + } + + if(type == -1) { + len = do_dump(lflags, io_ch, arg, str); + if(len < 0) return -1; + outlen += len; + return outlen; + } + + if(lflags & ASN1_STRFLGS_UTF8_CONVERT) { + /* Note: if string is UTF8 and we want + * to convert to UTF8 then we just interpret + * it as 1 byte per character to avoid converting + * twice. + */ + if(!type) type = 1; + else type |= BUF_TYPE_CONVUTF8; + } + + len = do_buf(str->data, str->length, type, flags, "es, io_ch, NULL); + if(len < 0) return -1; + outlen += len; + if(quotes) outlen += 2; + if(!arg) return outlen; + if(quotes && !io_ch(arg, "\"", 1)) return -1; + if(do_buf(str->data, str->length, type, flags, NULL, io_ch, arg) < 0) + return -1; + if(quotes && !io_ch(arg, "\"", 1)) return -1; + return outlen; +} + +/* Used for line indenting: print 'indent' spaces */ + +static int do_indent(char_io *io_ch, void *arg, int indent) +{ + int i; + for(i = 0; i < indent; i++) + if(!io_ch(arg, " ", 1)) return 0; + return 1; +} + +#define FN_WIDTH_LN 25 +#define FN_WIDTH_SN 10 + +static int do_name_ex(char_io *io_ch, void *arg, X509_NAME *n, + int indent, unsigned long flags) +{ + int i, prev = -1, orflags, cnt; + int fn_opt, fn_nid; + ASN1_OBJECT *fn; + ASN1_STRING *val; + X509_NAME_ENTRY *ent; + char objtmp[80]; + const char *objbuf; + int outlen, len; + char *sep_dn, *sep_mv, *sep_eq; + int sep_dn_len, sep_mv_len, sep_eq_len; + if(indent < 0) indent = 0; + outlen = indent; + if(!do_indent(io_ch, arg, indent)) return -1; + switch (flags & XN_FLAG_SEP_MASK) + { + case XN_FLAG_SEP_MULTILINE: + sep_dn = "\n"; + sep_dn_len = 1; + sep_mv = " + "; + sep_mv_len = 3; + break; + + case XN_FLAG_SEP_COMMA_PLUS: + sep_dn = ","; + sep_dn_len = 1; + sep_mv = "+"; + sep_mv_len = 1; + indent = 0; + break; + + case XN_FLAG_SEP_CPLUS_SPC: + sep_dn = ", "; + sep_dn_len = 2; + sep_mv = " + "; + sep_mv_len = 3; + indent = 0; + break; + + case XN_FLAG_SEP_SPLUS_SPC: + sep_dn = "; "; + sep_dn_len = 2; + sep_mv = " + "; + sep_mv_len = 3; + indent = 0; + break; + + default: + return -1; + } + + if(flags & XN_FLAG_SPC_EQ) { + sep_eq = " = "; + sep_eq_len = 3; + } else { + sep_eq = "="; + sep_eq_len = 1; + } + + fn_opt = flags & XN_FLAG_FN_MASK; + + cnt = X509_NAME_entry_count(n); + for(i = 0; i < cnt; i++) { + if(flags & XN_FLAG_DN_REV) + ent = X509_NAME_get_entry(n, cnt - i - 1); + else ent = X509_NAME_get_entry(n, i); + if(prev != -1) { + if(prev == ent->set) { + if(!io_ch(arg, sep_mv, sep_mv_len)) return -1; + outlen += sep_mv_len; + } else { + if(!io_ch(arg, sep_dn, sep_dn_len)) return -1; + outlen += sep_dn_len; + if(!do_indent(io_ch, arg, indent)) return -1; + outlen += indent; + } + } + prev = ent->set; + fn = X509_NAME_ENTRY_get_object(ent); + val = X509_NAME_ENTRY_get_data(ent); + fn_nid = OBJ_obj2nid(fn); + if(fn_opt != XN_FLAG_FN_NONE) { + int objlen, fld_len; + if((fn_opt == XN_FLAG_FN_OID) || (fn_nid==NID_undef) ) { + OBJ_obj2txt(objtmp, sizeof objtmp, fn, 1); + fld_len = 0; /* XXX: what should this be? */ + objbuf = objtmp; + } else { + if(fn_opt == XN_FLAG_FN_SN) { + fld_len = FN_WIDTH_SN; + objbuf = OBJ_nid2sn(fn_nid); + } else if(fn_opt == XN_FLAG_FN_LN) { + fld_len = FN_WIDTH_LN; + objbuf = OBJ_nid2ln(fn_nid); + } else { + fld_len = 0; /* XXX: what should this be? */ + objbuf = ""; + } + } + objlen = strlen(objbuf); + if(!io_ch(arg, objbuf, objlen)) return -1; + if ((objlen < fld_len) && (flags & XN_FLAG_FN_ALIGN)) { + if (!do_indent(io_ch, arg, fld_len - objlen)) return -1; + outlen += fld_len - objlen; + } + if(!io_ch(arg, sep_eq, sep_eq_len)) return -1; + outlen += objlen + sep_eq_len; + } + /* If the field name is unknown then fix up the DER dump + * flag. We might want to limit this further so it will + * DER dump on anything other than a few 'standard' fields. + */ + if((fn_nid == NID_undef) && (flags & XN_FLAG_DUMP_UNKNOWN_FIELDS)) + orflags = ASN1_STRFLGS_DUMP_ALL; + else orflags = 0; + + len = do_print_ex(io_ch, arg, flags | orflags, val); + if(len < 0) return -1; + outlen += len; + } + return outlen; +} + +/* Wrappers round the main functions */ + +int X509_NAME_print_ex(BIO *out, X509_NAME *nm, int indent, unsigned long flags) +{ + if(flags == XN_FLAG_COMPAT) + return X509_NAME_print(out, nm, indent); + return do_name_ex(send_bio_chars, out, nm, indent, flags); +} + +#ifndef OPENSSL_NO_FP_API +int X509_NAME_print_ex_fp(FILE *fp, X509_NAME *nm, int indent, unsigned long flags) +{ + if(flags == XN_FLAG_COMPAT) + { + BIO *btmp; + int ret; + btmp = BIO_new_fp(fp, BIO_NOCLOSE); + if(!btmp) return -1; + ret = X509_NAME_print(btmp, nm, indent); + BIO_free(btmp); + return ret; + } + return do_name_ex(send_fp_chars, fp, nm, indent, flags); +} +#endif + +int ASN1_STRING_print_ex(BIO *out, ASN1_STRING *str, unsigned long flags) +{ + return do_print_ex(send_bio_chars, out, flags, str); +} + +#ifndef OPENSSL_NO_FP_API +int ASN1_STRING_print_ex_fp(FILE *fp, ASN1_STRING *str, unsigned long flags) +{ + return do_print_ex(send_fp_chars, fp, flags, str); +} +#endif + +/* Utility function: convert any string type to UTF8, returns number of bytes + * in output string or a negative error code + */ + +int ASN1_STRING_to_UTF8(unsigned char **out, ASN1_STRING *in) +{ + ASN1_STRING stmp, *str = &stmp; + int mbflag, type, ret; + if(!in) return -1; + type = in->type; + if((type < 0) || (type > 30)) return -1; + mbflag = tag2nbyte[type]; + if(mbflag == -1) return -1; + mbflag |= MBSTRING_FLAG; + stmp.data = NULL; + ret = ASN1_mbstring_copy(&str, in->data, in->length, mbflag, B_ASN1_UTF8STRING); + if(ret < 0) return ret; + *out = stmp.data; + return stmp.length; +} |