/*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (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 <limits.h>
#include "internal/cryptlib.h"
#include <openssl/asn1.h>
+#include "asn1_local.h"
static int asn1_get_length(const unsigned char **pp, int *inf, long *rl,
long max);
/*
* If there is 0 or 1 byte left, the length check should pick things up
*/
- if (len <= 0)
- return (1);
- else if ((len >= 2) && ((*p)[0] == 0) && ((*p)[1] == 0)) {
- (*p) += 2;
- return (1);
+ if (len <= 0) {
+ return 1;
+ } else {
+ if ((len >= 2) && ((*p)[0] == 0) && ((*p)[1] == 0)) {
+ (*p) += 2;
+ return 1;
+ }
}
- return (0);
+ return 0;
}
int ASN1_check_infinite_end(unsigned char **p, long len)
int *pclass, long omax)
{
int i, ret;
- long l;
+ long len;
const unsigned char *p = *pp;
int tag, xclass, inf;
long max = omax;
- if (!max)
- goto err;
+ if (omax <= 0) {
+ ERR_raise(ERR_LIB_ASN1, ASN1_R_TOO_SMALL);
+ return 0x80;
+ }
ret = (*p & V_ASN1_CONSTRUCTED);
xclass = (*p & V_ASN1_PRIVATE);
i = *p & V_ASN1_PRIMITIVE_TAG;
p++;
if (--max == 0)
goto err;
- l = 0;
+ len = 0;
while (*p & 0x80) {
- l <<= 7L;
- l |= *(p++) & 0x7f;
+ len <<= 7L;
+ len |= *(p++) & 0x7f;
if (--max == 0)
goto err;
- if (l > (INT_MAX >> 7L))
+ if (len > (INT_MAX >> 7L))
goto err;
}
- l <<= 7L;
- l |= *(p++) & 0x7f;
- tag = (int)l;
+ len <<= 7L;
+ len |= *(p++) & 0x7f;
+ tag = (int)len;
if (--max == 0)
goto err;
} else {
goto err;
if (*plength > (omax - (p - *pp))) {
- ASN1err(ASN1_F_ASN1_GET_OBJECT, ASN1_R_TOO_LONG);
+ ERR_raise(ERR_LIB_ASN1, ASN1_R_TOO_LONG);
/*
* Set this so that even if things are not long enough the values are
* set correctly
ret |= 0x80;
}
*pp = p;
- return (ret | inf);
+ return ret | inf;
err:
- ASN1err(ASN1_F_ASN1_GET_OBJECT, ASN1_R_HEADER_TOO_LONG);
- return (0x80);
+ ERR_raise(ERR_LIB_ASN1, ASN1_R_HEADER_TOO_LONG);
+ return 0x80;
}
+/*
+ * Decode a length field.
+ * The short form is a single byte defining a length 0 - 127.
+ * The long form is a byte 0 - 127 with the top bit set and this indicates
+ * the number of following octets that contain the length. These octets
+ * are stored most significant digit first.
+ */
static int asn1_get_length(const unsigned char **pp, int *inf, long *rl,
long max)
{
const unsigned char *p = *pp;
unsigned long ret = 0;
- unsigned long i;
+ int i;
if (max-- < 1)
return 0;
if (*p == 0x80) {
*inf = 1;
- ret = 0;
p++;
} else {
*inf = 0;
i = *p & 0x7f;
- if (*(p++) & 0x80) {
- if (max < (long)i + 1)
+ if (*p++ & 0x80) {
+ if (max < i + 1)
return 0;
/* Skip leading zeroes */
- while (i && *p == 0) {
+ while (i > 0 && *p == 0) {
p++;
i--;
}
- if (i > sizeof(long))
+ if (i > (int)sizeof(long))
return 0;
- while (i-- > 0) {
- ret <<= 8L;
- ret |= *(p++);
+ while (i > 0) {
+ ret <<= 8;
+ ret |= *p++;
+ i--;
}
- } else
+ if (ret > LONG_MAX)
+ return 0;
+ } else {
ret = i;
+ }
}
- if (ret > LONG_MAX)
- return 0;
*pp = p;
*rl = (long)ret;
return 1;
}
/*
- * class 0 is constructed constructed == 2 for indefinite length constructed
+ * constructed == 2 for indefinite length constructed
*/
void ASN1_put_object(unsigned char **pp, int constructed, int length, int tag,
int xclass)
i = (constructed) ? V_ASN1_CONSTRUCTED : 0;
i |= (xclass & V_ASN1_PRIVATE);
- if (tag < 31)
+ if (tag < 31) {
*(p++) = i | (tag & V_ASN1_PRIMITIVE_TAG);
- else {
+ } else {
*(p++) = i | V_ASN1_PRIMITIVE_TAG;
for (i = 0, ttag = tag; ttag > 0; i++)
ttag >>= 7;
int ASN1_put_eoc(unsigned char **pp)
{
unsigned char *p = *pp;
+
*p++ = 0;
*p++ = 0;
*pp = p;
static void asn1_put_length(unsigned char **pp, int length)
{
unsigned char *p = *pp;
- int i, l;
- if (length <= 127)
+ int i, len;
+
+ if (length <= 127) {
*(p++) = (unsigned char)length;
- else {
- l = length;
- for (i = 0; l > 0; i++)
- l >>= 8;
+ } else {
+ len = length;
+ for (i = 0; len > 0; i++)
+ len >>= 8;
*(p++) = i | 0x80;
- l = i;
+ len = i;
while (i-- > 0) {
p[i] = length & 0xff;
length >>= 8;
}
- p += l;
+ p += len;
}
*pp = p;
}
int ASN1_object_size(int constructed, int length, int tag)
{
int ret = 1;
+
if (length < 0)
return -1;
if (tag >= 31) {
return ret + length;
}
+void ossl_asn1_string_set_bits_left(ASN1_STRING *str, unsigned int num)
+{
+ str->flags &= ~0x07;
+ str->flags |= ASN1_STRING_FLAG_BITS_LEFT | (num & 0x07);
+}
+
int ASN1_STRING_copy(ASN1_STRING *dst, const ASN1_STRING *str)
{
if (str == NULL)
ASN1_STRING *ASN1_STRING_dup(const ASN1_STRING *str)
{
ASN1_STRING *ret;
+
if (!str)
return NULL;
ret = ASN1_STRING_new();
return ret;
}
-int ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len)
+int ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len_in)
{
unsigned char *c;
const char *data = _data;
+ size_t len;
- if (len < 0) {
+ if (len_in < 0) {
if (data == NULL)
- return (0);
- else
- len = strlen(data);
+ return 0;
+ len = strlen(data);
+ } else {
+ len = (size_t)len_in;
}
- if ((str->length <= len) || (str->data == NULL)) {
+ /*
+ * Verify that the length fits within an integer for assignment to
+ * str->length below. The additional 1 is subtracted to allow for the
+ * '\0' terminator even though this isn't strictly necessary.
+ */
+ if (len > INT_MAX - 1) {
+ ERR_raise(ERR_LIB_ASN1, ASN1_R_TOO_LARGE);
+ return 0;
+ }
+ if ((size_t)str->length <= len || str->data == NULL) {
c = str->data;
+#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+ /* No NUL terminator in fuzzing builds */
+ str->data = OPENSSL_realloc(c, len != 0 ? len : 1);
+#else
str->data = OPENSSL_realloc(c, len + 1);
+#endif
if (str->data == NULL) {
- ASN1err(ASN1_F_ASN1_STRING_SET, ERR_R_MALLOC_FAILURE);
str->data = c;
- return (0);
+ return 0;
}
}
str->length = len;
if (data != NULL) {
memcpy(str->data, data, len);
- /* an allowance for strings :-) */
+#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+ /* Set the unused byte to something non NUL and printable. */
+ if (len == 0)
+ str->data[len] = '~';
+#else
+ /*
+ * Add a NUL terminator. This should not be necessary - but we add it as
+ * a safety precaution
+ */
str->data[len] = '\0';
+#endif
}
- return (1);
+ return 1;
}
void ASN1_STRING_set0(ASN1_STRING *str, void *data, int len)
ASN1_STRING *ASN1_STRING_new(void)
{
- return (ASN1_STRING_type_new(V_ASN1_OCTET_STRING));
+ return ASN1_STRING_type_new(V_ASN1_OCTET_STRING);
}
ASN1_STRING *ASN1_STRING_type_new(int type)
ASN1_STRING *ret;
ret = OPENSSL_zalloc(sizeof(*ret));
- if (ret == NULL) {
- ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW, ERR_R_MALLOC_FAILURE);
- return (NULL);
- }
+ if (ret == NULL)
+ return NULL;
ret->type = type;
- return (ret);
+ return ret;
}
-void ASN1_STRING_free(ASN1_STRING *a)
+void ossl_asn1_string_embed_free(ASN1_STRING *a, int embed)
{
if (a == NULL)
return;
if (!(a->flags & ASN1_STRING_FLAG_NDEF))
OPENSSL_free(a->data);
- if (!(a->flags & ASN1_STRING_FLAG_EMBED))
+ if (embed == 0)
OPENSSL_free(a);
}
+void ASN1_STRING_free(ASN1_STRING *a)
+{
+ if (a == NULL)
+ return;
+ ossl_asn1_string_embed_free(a, a->flags & ASN1_STRING_FLAG_EMBED);
+}
+
void ASN1_STRING_clear_free(ASN1_STRING *a)
{
if (a == NULL)
i = (a->length - b->length);
if (i == 0) {
- i = memcmp(a->data, b->data, a->length);
+ if (a->length != 0)
+ i = memcmp(a->data, b->data, a->length);
if (i == 0)
- return (a->type - b->type);
+ return a->type - b->type;
else
- return (i);
- } else
- return (i);
+ return i;
+ } else {
+ return i;
+ }
}
int ASN1_STRING_length(const ASN1_STRING *x)
return x->length;
}
+#ifndef OPENSSL_NO_DEPRECATED_3_0
void ASN1_STRING_length_set(ASN1_STRING *x, int len)
{
x->length = len;
}
+#endif
int ASN1_STRING_type(const ASN1_STRING *x)
{
return x->data;
}
-# if OPENSSL_API_COMPAT < 0x10100000L
+#ifndef OPENSSL_NO_DEPRECATED_1_1_0
unsigned char *ASN1_STRING_data(ASN1_STRING *x)
{
return x->data;
}
#endif
+
+/* |max_len| excludes NUL terminator and may be 0 to indicate no restriction */
+char *ossl_sk_ASN1_UTF8STRING2text(STACK_OF(ASN1_UTF8STRING) *text,
+ const char *sep, size_t max_len)
+{
+ int i;
+ ASN1_UTF8STRING *current;
+ size_t length = 0, sep_len;
+ char *result = NULL;
+ char *p;
+
+ if (sep == NULL)
+ sep = "";
+ sep_len = strlen(sep);
+
+ for (i = 0; i < sk_ASN1_UTF8STRING_num(text); i++) {
+ current = sk_ASN1_UTF8STRING_value(text, i);
+ if (i > 0)
+ length += sep_len;
+ length += ASN1_STRING_length(current);
+ if (max_len != 0 && length > max_len)
+ return NULL;
+ }
+ if ((result = OPENSSL_malloc(length + 1)) == NULL)
+ return NULL;
+
+ p = result;
+ for (i = 0; i < sk_ASN1_UTF8STRING_num(text); i++) {
+ current = sk_ASN1_UTF8STRING_value(text, i);
+ length = ASN1_STRING_length(current);
+ if (i > 0 && sep_len > 0) {
+ strncpy(p, sep, sep_len + 1); /* using + 1 to silence gcc warning */
+ p += sep_len;
+ }
+ strncpy(p, (const char *)ASN1_STRING_get0_data(current), length);
+ p += length;
+ }
+ *p = '\0';
+
+ return result;
+}
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