apps/pkcs12: print multiple PKCS#12 safeBag attribute values if present

Currently the pkcs12 app will only ever print the first value of a multi-value
attribute. This is OK for some attributes (e.g. friendlyName, localKeyId) but
may miss values for other attributes.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/9751)

CHANGES

@@ -9,6 +9,10 @@
 
  Changes between 1.1.1 and 3.0.0 [xx XXX xxxx]
 
+  *) Print all values for a PKCS#12 attribute with 'openssl pkcs12', not just
+     the first value.
+     [Jon Spillett]
+
   *) Deprecated the public definition of ERR_STATE as well as the function
      ERR_get_state().  This is done in preparation of making ERR_STATE an
      opaque type.

apps/pkcs12.c

@@ -41,6 +41,7 @@ int dump_certs_pkeys_bags(BIO *out, const STACK_OF(PKCS12_SAFEBAG) *bags,
 int dump_certs_pkeys_bag(BIO *out, const PKCS12_SAFEBAG *bags,
                          const char *pass, int passlen,
                          int options, char *pempass, const EVP_CIPHER *enc);
+void print_attribute(BIO *out, const ASN1_TYPE *av);
 int print_attribs(BIO *out, const STACK_OF(X509_ATTRIBUTE) *attrlst,
                   const char *name);
 void hex_prin(BIO *out, unsigned char *buf, int len);
@@ -878,6 +879,38 @@ int cert_load(BIO *in, STACK_OF(X509) *sk)
     return ret;
 }
 
+/* Generalised x509 attribute value print */
+
+void print_attribute(BIO *out, const ASN1_TYPE *av)
+{
+    char *value;
+
+    switch (av->type) {
+    case V_ASN1_BMPSTRING:
+        value = OPENSSL_uni2asc(av->value.bmpstring->data,
+                                av->value.bmpstring->length);
+        BIO_printf(out, "%s\n", value);
+        OPENSSL_free(value);
+        break;
+
+    case V_ASN1_OCTET_STRING:
+        hex_prin(out, av->value.octet_string->data,
+                 av->value.octet_string->length);
+        BIO_printf(out, "\n");
+        break;
+
+    case V_ASN1_BIT_STRING:
+        hex_prin(out, av->value.bit_string->data,
+                 av->value.bit_string->length);
+        BIO_printf(out, "\n");
+        break;
+
+    default:
+        BIO_printf(out, "<Unsupported tag %d>\n", av->type);
+        break;
+    }
+}
+
 /* Generalised attribute print: handle PKCS#8 and bag attributes */
 
 int print_attribs(BIO *out, const STACK_OF(X509_ATTRIBUTE) *attrlst,
@@ -885,8 +918,7 @@ int print_attribs(BIO *out, const STACK_OF(X509_ATTRIBUTE) *attrlst,
 {
     X509_ATTRIBUTE *attr;
     ASN1_TYPE *av;
-    char *value;
-    int i, attr_nid;
+    int i, j, attr_nid;
     if (!attrlst) {
         BIO_printf(out, "%s: <No Attributes>\n", name);
         return 1;
@@ -910,30 +942,10 @@ int print_attribs(BIO *out, const STACK_OF(X509_ATTRIBUTE) *attrlst,
         }
 
         if (X509_ATTRIBUTE_count(attr)) {
-            av = X509_ATTRIBUTE_get0_type(attr, 0);
-            switch (av->type) {
-            case V_ASN1_BMPSTRING:
-                value = OPENSSL_uni2asc(av->value.bmpstring->data,
-                                        av->value.bmpstring->length);
-                BIO_printf(out, "%s\n", value);
-                OPENSSL_free(value);
-                break;
-
-            case V_ASN1_OCTET_STRING:
-                hex_prin(out, av->value.octet_string->data,
-                         av->value.octet_string->length);
-                BIO_printf(out, "\n");
-                break;
-
-            case V_ASN1_BIT_STRING:
-                hex_prin(out, av->value.bit_string->data,
-                         av->value.bit_string->length);
-                BIO_printf(out, "\n");
-                break;
-
-            default:
-                BIO_printf(out, "<Unsupported tag %d>\n", av->type);
-                break;
+            for (j = 0; j < X509_ATTRIBUTE_count(attr); j++)
+            {
+                av = X509_ATTRIBUTE_get0_type(attr, j);
+                print_attribute(out, av);
             }
         } else {
             BIO_printf(out, "<No Values>\n");