- int *pclass, long omax)
- {
- int i,ret;
- long l;
- const unsigned char *p= *pp;
- int tag,xclass,inf;
- long max=omax;
-
- if (!max) goto err;
- ret=(*p&V_ASN1_CONSTRUCTED);
- xclass=(*p&V_ASN1_PRIVATE);
- i= *p&V_ASN1_PRIMITIVE_TAG;
- if (i == V_ASN1_PRIMITIVE_TAG)
- { /* high-tag */
- p++;
- if (--max == 0) goto err;
- l=0;
- while (*p&0x80)
- {
- l<<=7L;
- l|= *(p++)&0x7f;
- if (--max == 0) goto err;
- if (l > (INT_MAX >> 7L)) goto err;
- }
- l<<=7L;
- l|= *(p++)&0x7f;
- tag=(int)l;
- if (--max == 0) goto err;
- }
- else
- {
- tag=i;
- p++;
- if (--max == 0) goto err;
- }
- *ptag=tag;
- *pclass=xclass;
- if (!asn1_get_length(&p,&inf,plength,(int)max)) goto err;
-
-#if 0
- fprintf(stderr,"p=%d + *plength=%ld > omax=%ld + *pp=%d (%d > %d)\n",
- (int)p,*plength,omax,(int)*pp,(int)(p+ *plength),
- (int)(omax+ *pp));
-
-#endif
- if (*plength > (omax - (p - *pp)))
- {
- ASN1err(ASN1_F_ASN1_GET_OBJECT,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);
-err:
- ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_HEADER_TOO_LONG);
- return(0x80);
- }
-
-static int asn1_get_length(const unsigned char **pp, int *inf, long *rl, int max)
- {
- const unsigned char *p= *pp;
- unsigned long ret=0;
- unsigned 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 (i > sizeof(long))
- return 0;
- if (max-- == 0) return(0);
- while (i-- > 0)
- {
- ret<<=8L;
- ret|= *(p++);
- if (max-- == 0) 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 */
+ int *pclass, long omax)
+{
+ int i, ret;
+ long l;
+ const unsigned char *p = *pp;
+ int tag, xclass, inf;
+ long max = omax;
+
+ if (!max)
+ goto err;
+ ret = (*p & V_ASN1_CONSTRUCTED);
+ xclass = (*p & V_ASN1_PRIVATE);
+ i = *p & V_ASN1_PRIMITIVE_TAG;
+ if (i == V_ASN1_PRIMITIVE_TAG) { /* high-tag */
+ p++;
+ if (--max == 0)
+ goto err;
+ l = 0;
+ while (*p & 0x80) {
+ l <<= 7L;
+ l |= *(p++) & 0x7f;
+ if (--max == 0)
+ goto err;
+ if (l > (INT_MAX >> 7L))
+ goto err;
+ }
+ l <<= 7L;
+ l |= *(p++) & 0x7f;
+ tag = (int)l;
+ if (--max == 0)
+ goto err;
+ } else {
+ tag = i;
+ p++;
+ if (--max == 0)
+ goto err;
+ }
+ *ptag = tag;
+ *pclass = xclass;
+ if (!asn1_get_length(&p, &inf, plength, (int)max))
+ goto err;
+
+ if (inf && !(ret & V_ASN1_CONSTRUCTED))
+ goto err;
+
+ if (*plength > (omax - (p - *pp))) {
+ ASN1err(ASN1_F_ASN1_GET_OBJECT, 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);
+ err:
+ ASN1err(ASN1_F_ASN1_GET_OBJECT, ASN1_R_HEADER_TOO_LONG);
+ return (0x80);
+}
+
+static int asn1_get_length(const unsigned char **pp, int *inf, long *rl,
+ int max)
+{
+ const unsigned char *p = *pp;
+ unsigned long ret = 0;
+ unsigned 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 < (int)i)
+ return 0;
+ /* Skip leading zeroes */
+ while (i && *p == 0) {
+ p++;
+ i--;
+ }
+ if (i > sizeof(long))
+ return 0;
+ while (i-- > 0) {
+ ret <<= 8L;
+ ret |= *(p++);
+ }
+ } 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
+ */