| /* |
| * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the OpenSSL license (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <stdio.h> |
| #include <ctype.h> |
| #include "internal/cryptlib.h" |
| #include <openssl/asn1.h> |
| |
| static int traverse_string(const unsigned char *p, int len, int inform, |
| int (*rfunc) (unsigned long value, void *in), |
| void *arg); |
| static int in_utf8(unsigned long value, void *arg); |
| static int out_utf8(unsigned long value, void *arg); |
| static int type_str(unsigned long value, void *arg); |
| static int cpy_asc(unsigned long value, void *arg); |
| static int cpy_bmp(unsigned long value, void *arg); |
| static int cpy_univ(unsigned long value, void *arg); |
| static int cpy_utf8(unsigned long value, void *arg); |
| static int is_numeric(unsigned long value); |
| static int is_printable(unsigned long value); |
| |
| /* |
| * These functions take a string in UTF8, ASCII or multibyte form and a mask |
| * of permissible ASN1 string types. It then works out the minimal type |
| * (using the order Numeric < Printable < IA5 < T61 < BMP < Universal < UTF8) |
| * and creates a string of the correct type with the supplied data. Yes this is |
| * horrible: it has to be :-( The 'ncopy' form checks minimum and maximum |
| * size limits too. |
| */ |
| |
| int ASN1_mbstring_copy(ASN1_STRING **out, const unsigned char *in, int len, |
| int inform, unsigned long mask) |
| { |
| return ASN1_mbstring_ncopy(out, in, len, inform, mask, 0, 0); |
| } |
| |
| int ASN1_mbstring_ncopy(ASN1_STRING **out, const unsigned char *in, int len, |
| int inform, unsigned long mask, |
| long minsize, long maxsize) |
| { |
| int str_type; |
| int ret; |
| char free_out; |
| int outform, outlen = 0; |
| ASN1_STRING *dest; |
| unsigned char *p; |
| int nchar; |
| char strbuf[32]; |
| int (*cpyfunc) (unsigned long, void *) = NULL; |
| if (len == -1) |
| len = strlen((const char *)in); |
| if (!mask) |
| mask = DIRSTRING_TYPE; |
| |
| /* First do a string check and work out the number of characters */ |
| switch (inform) { |
| |
| case MBSTRING_BMP: |
| if (len & 1) { |
| ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, |
| ASN1_R_INVALID_BMPSTRING_LENGTH); |
| return -1; |
| } |
| nchar = len >> 1; |
| break; |
| |
| case MBSTRING_UNIV: |
| if (len & 3) { |
| ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, |
| ASN1_R_INVALID_UNIVERSALSTRING_LENGTH); |
| return -1; |
| } |
| nchar = len >> 2; |
| break; |
| |
| case MBSTRING_UTF8: |
| nchar = 0; |
| /* This counts the characters and does utf8 syntax checking */ |
| ret = traverse_string(in, len, MBSTRING_UTF8, in_utf8, &nchar); |
| if (ret < 0) { |
| ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_INVALID_UTF8STRING); |
| return -1; |
| } |
| break; |
| |
| case MBSTRING_ASC: |
| nchar = len; |
| break; |
| |
| default: |
| ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_UNKNOWN_FORMAT); |
| return -1; |
| } |
| |
| if ((minsize > 0) && (nchar < minsize)) { |
| ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_STRING_TOO_SHORT); |
| BIO_snprintf(strbuf, sizeof strbuf, "%ld", minsize); |
| ERR_add_error_data(2, "minsize=", strbuf); |
| return -1; |
| } |
| |
| if ((maxsize > 0) && (nchar > maxsize)) { |
| ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_STRING_TOO_LONG); |
| BIO_snprintf(strbuf, sizeof strbuf, "%ld", maxsize); |
| ERR_add_error_data(2, "maxsize=", strbuf); |
| return -1; |
| } |
| |
| /* Now work out minimal type (if any) */ |
| if (traverse_string(in, len, inform, type_str, &mask) < 0) { |
| ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_ILLEGAL_CHARACTERS); |
| return -1; |
| } |
| |
| /* Now work out output format and string type */ |
| outform = MBSTRING_ASC; |
| if (mask & B_ASN1_NUMERICSTRING) |
| str_type = V_ASN1_NUMERICSTRING; |
| else if (mask & B_ASN1_PRINTABLESTRING) |
| str_type = V_ASN1_PRINTABLESTRING; |
| else if (mask & B_ASN1_IA5STRING) |
| str_type = V_ASN1_IA5STRING; |
| else if (mask & B_ASN1_T61STRING) |
| str_type = V_ASN1_T61STRING; |
| else if (mask & B_ASN1_BMPSTRING) { |
| str_type = V_ASN1_BMPSTRING; |
| outform = MBSTRING_BMP; |
| } else if (mask & B_ASN1_UNIVERSALSTRING) { |
| str_type = V_ASN1_UNIVERSALSTRING; |
| outform = MBSTRING_UNIV; |
| } else { |
| str_type = V_ASN1_UTF8STRING; |
| outform = MBSTRING_UTF8; |
| } |
| if (!out) |
| return str_type; |
| if (*out) { |
| free_out = 0; |
| dest = *out; |
| OPENSSL_free(dest->data); |
| dest->data = NULL; |
| dest->length = 0; |
| dest->type = str_type; |
| } else { |
| free_out = 1; |
| dest = ASN1_STRING_type_new(str_type); |
| if (dest == NULL) { |
| ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ERR_R_MALLOC_FAILURE); |
| return -1; |
| } |
| *out = dest; |
| } |
| /* If both the same type just copy across */ |
| if (inform == outform) { |
| if (!ASN1_STRING_set(dest, in, len)) { |
| ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ERR_R_MALLOC_FAILURE); |
| return -1; |
| } |
| return str_type; |
| } |
| |
| /* Work out how much space the destination will need */ |
| switch (outform) { |
| case MBSTRING_ASC: |
| outlen = nchar; |
| cpyfunc = cpy_asc; |
| break; |
| |
| case MBSTRING_BMP: |
| outlen = nchar << 1; |
| cpyfunc = cpy_bmp; |
| break; |
| |
| case MBSTRING_UNIV: |
| outlen = nchar << 2; |
| cpyfunc = cpy_univ; |
| break; |
| |
| case MBSTRING_UTF8: |
| outlen = 0; |
| traverse_string(in, len, inform, out_utf8, &outlen); |
| cpyfunc = cpy_utf8; |
| break; |
| } |
| if ((p = OPENSSL_malloc(outlen + 1)) == NULL) { |
| if (free_out) |
| ASN1_STRING_free(dest); |
| ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ERR_R_MALLOC_FAILURE); |
| return -1; |
| } |
| dest->length = outlen; |
| dest->data = p; |
| p[outlen] = 0; |
| traverse_string(in, len, inform, cpyfunc, &p); |
| return str_type; |
| } |
| |
| /* |
| * This function traverses a string and passes the value of each character to |
| * an optional function along with a void * argument. |
| */ |
| |
| static int traverse_string(const unsigned char *p, int len, int inform, |
| int (*rfunc) (unsigned long value, void *in), |
| void *arg) |
| { |
| unsigned long value; |
| int ret; |
| while (len) { |
| if (inform == MBSTRING_ASC) { |
| value = *p++; |
| len--; |
| } else if (inform == MBSTRING_BMP) { |
| value = *p++ << 8; |
| value |= *p++; |
| len -= 2; |
| } else if (inform == MBSTRING_UNIV) { |
| value = ((unsigned long)*p++) << 24; |
| value |= ((unsigned long)*p++) << 16; |
| value |= *p++ << 8; |
| value |= *p++; |
| len -= 4; |
| } else { |
| ret = UTF8_getc(p, len, &value); |
| if (ret < 0) |
| return -1; |
| len -= ret; |
| p += ret; |
| } |
| if (rfunc) { |
| ret = rfunc(value, arg); |
| if (ret <= 0) |
| return ret; |
| } |
| } |
| return 1; |
| } |
| |
| /* Various utility functions for traverse_string */ |
| |
| /* Just count number of characters */ |
| |
| static int in_utf8(unsigned long value, void *arg) |
| { |
| int *nchar; |
| nchar = arg; |
| (*nchar)++; |
| return 1; |
| } |
| |
| /* Determine size of output as a UTF8 String */ |
| |
| static int out_utf8(unsigned long value, void *arg) |
| { |
| int *outlen; |
| outlen = arg; |
| *outlen += UTF8_putc(NULL, -1, value); |
| return 1; |
| } |
| |
| /* |
| * Determine the "type" of a string: check each character against a supplied |
| * "mask". |
| */ |
| |
| static int type_str(unsigned long value, void *arg) |
| { |
| unsigned long types; |
| types = *((unsigned long *)arg); |
| if ((types & B_ASN1_NUMERICSTRING) && !is_numeric(value)) |
| types &= ~B_ASN1_NUMERICSTRING; |
| if ((types & B_ASN1_PRINTABLESTRING) && !is_printable(value)) |
| types &= ~B_ASN1_PRINTABLESTRING; |
| if ((types & B_ASN1_IA5STRING) && (value > 127)) |
| types &= ~B_ASN1_IA5STRING; |
| if ((types & B_ASN1_T61STRING) && (value > 0xff)) |
| types &= ~B_ASN1_T61STRING; |
| if ((types & B_ASN1_BMPSTRING) && (value > 0xffff)) |
| types &= ~B_ASN1_BMPSTRING; |
| if (!types) |
| return -1; |
| *((unsigned long *)arg) = types; |
| return 1; |
| } |
| |
| /* Copy one byte per character ASCII like strings */ |
| |
| static int cpy_asc(unsigned long value, void *arg) |
| { |
| unsigned char **p, *q; |
| p = arg; |
| q = *p; |
| *q = (unsigned char)value; |
| (*p)++; |
| return 1; |
| } |
| |
| /* Copy two byte per character BMPStrings */ |
| |
| static int cpy_bmp(unsigned long value, void *arg) |
| { |
| unsigned char **p, *q; |
| p = arg; |
| q = *p; |
| *q++ = (unsigned char)((value >> 8) & 0xff); |
| *q = (unsigned char)(value & 0xff); |
| *p += 2; |
| return 1; |
| } |
| |
| /* Copy four byte per character UniversalStrings */ |
| |
| static int cpy_univ(unsigned long value, void *arg) |
| { |
| unsigned char **p, *q; |
| p = arg; |
| q = *p; |
| *q++ = (unsigned char)((value >> 24) & 0xff); |
| *q++ = (unsigned char)((value >> 16) & 0xff); |
| *q++ = (unsigned char)((value >> 8) & 0xff); |
| *q = (unsigned char)(value & 0xff); |
| *p += 4; |
| return 1; |
| } |
| |
| /* Copy to a UTF8String */ |
| |
| static int cpy_utf8(unsigned long value, void *arg) |
| { |
| unsigned char **p; |
| int ret; |
| p = arg; |
| /* We already know there is enough room so pass 0xff as the length */ |
| ret = UTF8_putc(*p, 0xff, value); |
| *p += ret; |
| return 1; |
| } |
| |
| /* Return 1 if the character is permitted in a PrintableString */ |
| static int is_printable(unsigned long value) |
| { |
| int ch; |
| if (value > 0x7f) |
| return 0; |
| ch = (int)value; |
| /* |
| * Note: we can't use 'isalnum' because certain accented characters may |
| * count as alphanumeric in some environments. |
| */ |
| #ifndef CHARSET_EBCDIC |
| if ((ch >= 'a') && (ch <= 'z')) |
| return 1; |
| if ((ch >= 'A') && (ch <= 'Z')) |
| return 1; |
| if ((ch >= '0') && (ch <= '9')) |
| return 1; |
| if ((ch == ' ') || strchr("'()+,-./:=?", ch)) |
| return 1; |
| #else /* CHARSET_EBCDIC */ |
| if ((ch >= os_toascii['a']) && (ch <= os_toascii['z'])) |
| return 1; |
| if ((ch >= os_toascii['A']) && (ch <= os_toascii['Z'])) |
| return 1; |
| if ((ch >= os_toascii['0']) && (ch <= os_toascii['9'])) |
| return 1; |
| if ((ch == os_toascii[' ']) || strchr("'()+,-./:=?", os_toebcdic[ch])) |
| return 1; |
| #endif /* CHARSET_EBCDIC */ |
| return 0; |
| } |
| |
| /* Return 1 if the character is a digit or space */ |
| static int is_numeric(unsigned long value) |
| { |
| int ch; |
| if (value > 0x7f) |
| return 0; |
| ch = (int)value; |
| #ifndef CHARSET_EBCDIC |
| if (!isdigit(ch) && ch != ' ') |
| return 0; |
| #else |
| if (ch > os_toascii['9']) |
| return 0; |
| if (ch < os_toascii['0'] && ch != os_toascii[' ']) |
| return 0; |
| #endif |
| return 1; |
| } |
