#include "cryptlib.h"
#include <openssl/asn1.h>
-ASN1_BIT_STRING *ASN1_BIT_STRING_new(void)
-{ return M_ASN1_BIT_STRING_new(); }
-
-void ASN1_BIT_STRING_free(ASN1_BIT_STRING *x)
-{ M_ASN1_BIT_STRING_free(x); }
-
int ASN1_BIT_STRING_set(ASN1_BIT_STRING *x, unsigned char *d, int len)
{ return M_ASN1_BIT_STRING_set(x, d, len); }
-int i2d_ASN1_BIT_STRING(ASN1_BIT_STRING *a, unsigned char **pp)
-{
- int len, ret;
- len = i2c_ASN1_BIT_STRING(a, NULL);
- ret=ASN1_object_size(0,len,V_ASN1_BIT_STRING);
- if(pp) {
- ASN1_put_object(pp,0,len,V_ASN1_BIT_STRING,V_ASN1_UNIVERSAL);
- i2c_ASN1_BIT_STRING(a, pp);
- }
- return ret;
-}
-
int i2c_ASN1_BIT_STRING(ASN1_BIT_STRING *a, unsigned char **pp)
{
int ret,j,bits,len;
if (a == NULL) return(0);
len=a->length;
- ret=1+len;
- if (pp == NULL) return(ret);
if (len > 0)
{
}
else
bits=0;
+
+ ret=1+len;
+ if (pp == NULL) return(ret);
+
p= *pp;
*(p++)=(unsigned char)bits;
return(ret);
}
-
-/* Convert DER encoded ASN1 BIT_STRING to ASN1_BIT_STRING structure */
-ASN1_BIT_STRING *d2i_ASN1_BIT_STRING(ASN1_BIT_STRING **a, unsigned char **pp,
- long length)
-{
- unsigned char *p;
- long len;
+ASN1_BIT_STRING *c2i_ASN1_BIT_STRING(ASN1_BIT_STRING **a,
+ const unsigned char **pp, long len)
+ {
+ ASN1_BIT_STRING *ret=NULL;
+ const unsigned char *p;
+ unsigned char *s;
int i;
- int inf,tag,xclass;
- ASN1_BIT_STRING *ret;
- p= *pp;
- inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
- if (inf & 0x80)
+ if (len < 1)
{
- i=ASN1_R_BAD_OBJECT_HEADER;
+ i=ASN1_R_STRING_TOO_SHORT;
goto err;
}
- if (tag != V_ASN1_BIT_STRING)
- {
- i=ASN1_R_EXPECTING_A_BIT_STRING;
- goto err;
- }
- if (len < 1) { i=ASN1_R_STRING_TOO_SHORT; goto err; }
- ret = c2i_ASN1_BIT_STRING(a, &p, len);
- if(ret) *pp = p;
- return ret;
-err:
- ASN1err(ASN1_F_D2I_ASN1_BIT_STRING,i);
- return(NULL);
-
-}
-
-ASN1_BIT_STRING *c2i_ASN1_BIT_STRING(ASN1_BIT_STRING **a, unsigned char **pp,
- long len)
- {
- ASN1_BIT_STRING *ret=NULL;
- unsigned char *p,*s;
- int i;
-
if ((a == NULL) || ((*a) == NULL))
{
if ((ret=M_ASN1_BIT_STRING_new()) == NULL) return(NULL);
p= *pp;
i= *(p++);
+ if (i > 7)
+ {
+ i=ASN1_R_INVALID_BIT_STRING_BITS_LEFT;
+ goto err;
+ }
/* We do this to preserve the settings. If we modify
* the settings, via the _set_bit function, we will recalculate
* on output */
ret->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); /* clear */
- ret->flags|=(ASN1_STRING_FLAG_BITS_LEFT|(i&0x07)); /* set */
+ ret->flags|=(ASN1_STRING_FLAG_BITS_LEFT|i); /* set */
if (len-- > 1) /* using one because of the bits left byte */
{
*pp=p;
return(ret);
err:
- ASN1err(ASN1_F_D2I_ASN1_BIT_STRING,i);
+ ASN1err(ASN1_F_C2I_ASN1_BIT_STRING,i);
if ((ret != NULL) && ((a == NULL) || (*a != ret)))
M_ASN1_BIT_STRING_free(ret);
return(NULL);
w=n/8;
v=1<<(7-(n&0x07));
iv= ~v;
+ if (!value) v=0;
+
+ if (a == NULL)
+ return 0;
a->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); /* clear, set on write */
- if (a == NULL) return(0);
if ((a->length < (w+1)) || (a->data == NULL))
{
if (!value) return(1); /* Don't need to set */
if (a->data == NULL)
c=(unsigned char *)OPENSSL_malloc(w+1);
else
- c=(unsigned char *)OPENSSL_realloc(a->data,w+1);
- if (c == NULL) return(0);
- if (w+1-a->length > 0) memset(c+a->length, 0, w+1-a->length);
+ c=(unsigned char *)OPENSSL_realloc_clean(a->data,
+ a->length,
+ w+1);
+ if (c == NULL)
+ {
+ ASN1err(ASN1_F_ASN1_BIT_STRING_SET_BIT,ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ if (w+1-a->length > 0) memset(c+a->length, 0, w+1-a->length);
a->data=c;
a->length=w+1;
}
return(1);
}
-int ASN1_BIT_STRING_get_bit(ASN1_BIT_STRING *a, int n)
+int ASN1_BIT_STRING_get_bit(const ASN1_BIT_STRING *a, int n)
{
int w,v;
return((a->data[w]&v) != 0);
}
+/*
+ * Checks if the given bit string contains only bits specified by
+ * the flags vector. Returns 0 if there is at least one bit set in 'a'
+ * which is not specified in 'flags', 1 otherwise.
+ * 'len' is the length of 'flags'.
+ */
+int ASN1_BIT_STRING_check(const ASN1_BIT_STRING *a,
+ const unsigned char *flags, int flags_len)
+ {
+ int i, ok;
+ /* Check if there is one bit set at all. */
+ if (!a || !a->data) return 1;
+
+ /* Check each byte of the internal representation of the bit string. */
+ ok = 1;
+ for (i = 0; i < a->length && ok; ++i)
+ {
+ unsigned char mask = i < flags_len ? ~flags[i] : 0xff;
+ /* We are done if there is an unneeded bit set. */
+ ok = (a->data[i] & mask) == 0;
+ }
+ return ok;
+ }
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