New function OBJ_obj2txt()

2 files changed, 67 insertions, 0 deletions

diff --git a/crypto/objects/obj_dat.c b/crypto/objects/obj_dat.c
index d56edcdf96..d47b874399 100644
--- a/crypto/objects/obj_dat.c
+++ b/crypto/objects/obj_dat.c
@@ -418,6 +418,72 @@ ASN1_OBJECT *OBJ_txt2obj(const char *s, int no_name)
 	return op;
 	}
 
+int OBJ_obj2txt(char *buf, int buf_len, ASN1_OBJECT *a, int no_name)
+{
+	int i,idx=0,n=0,len,nid;
+	unsigned long l;
+	unsigned char *p;
+	const char *s;
+	char tbuf[32];
+
+	if (buf_len <= 0) return(0);
+
+	if ((a == NULL) || (a->data == NULL)) {
+		buf[0]='\0';
+		return(0);
+	}
+
+	nid=OBJ_obj2nid(a);
+	if ((nid == NID_undef) || no_name) {
+		len=a->length;
+		p=a->data;
+
+		idx=0;
+		l=0;
+		while (idx < a->length) {
+			l|=(p[idx]&0x7f);
+			if (!(p[idx] & 0x80)) break;
+			l<<=7L;
+			idx++;
+		}
+		idx++;
+		i=(int)(l/40);
+		if (i > 2) i=2;
+		l-=(long)(i*40);
+
+		sprintf(tbuf,"%d.%lu",i,l);
+		i=strlen(tbuf);
+		strncpy(buf,tbuf,buf_len);
+		buf_len-=i;
+		buf+=i;
+		n+=i;
+
+		l=0;
+		for (; idx<len; idx++) {
+			l|=p[idx]&0x7f;
+			if (!(p[idx] & 0x80)) {
+				sprintf(tbuf,".%lu",l);
+				i=strlen(tbuf);
+				if (buf_len > 0)
+					strncpy(buf,tbuf,buf_len);
+				buf_len-=i;
+				buf+=i;
+				n+=i;
+				l=0;
+			}
+			l<<=7L;
+		}
+	} else {
+		s=OBJ_nid2ln(nid);
+		if (s == NULL)
+			s=OBJ_nid2sn(nid);
+		strncpy(buf,s,buf_len);
+		n=strlen(s);
+	}
+	buf[buf_len-1]='\0';
+	return(n);
+}
+
 int OBJ_txt2nid(char *s)
 {
 	ASN1_OBJECT *obj;
diff --git a/crypto/objects/objects.h b/crypto/objects/objects.h
index e0f88f1f03..d03748e022 100644
--- a/crypto/objects/objects.h
+++ b/crypto/objects/objects.h
@@ -928,6 +928,7 @@ const char *	OBJ_nid2ln(int n);
 const char *	OBJ_nid2sn(int n);
 int		OBJ_obj2nid(ASN1_OBJECT *o);
 ASN1_OBJECT *	OBJ_txt2obj(const char *s, int no_name);
+int	OBJ_obj2txt(char *buf, int buf_len, ASN1_OBJECT *a, int no_name);
 int		OBJ_txt2nid(char *s);
 int		OBJ_ln2nid(const char *s);
 int		OBJ_sn2nid(const char *s);