Improved support for RSA and DSA public keys

This patch allows the public_key module to decode and encode RSA and DSA
keys encoded using the SubjectPublicKeyInfo format.  When
pem_entry_encode is called on an RSA or DSA public key type, the key is
wrapped in the SubjectPublicKeyInfo format.

1 files changed, 14 insertions, 7 deletions

diff --git a/lib/public_key/doc/src/public_key.xml b/lib/public_key/doc/src/public_key.xml
index c72719fac4..91e058f74e 100644
--- a/lib/public_key/doc/src/public_key.xml
+++ b/lib/public_key/doc/src/public_key.xml
@@ -64,8 +64,8 @@
 
     <p><c>decrypt_der() = binary() </c></p>
     
-    <p><c>pki_asn1_type() = 'Certificate' | 'RSAPrivateKey'|
-    'DSAPrivateKey' | 'DHParameter'</c></p>
+    <p><c>pki_asn1_type() = 'Certificate' | 'RSAPrivateKey'| 'RSAPublicKey'
+    'DSAPrivateKey' | 'DSAPublicKey' | 'DHParameter' | 'SubjectPublicKeyInfo'</c></p>
 
      <p><c>pem_entry () = {pki_asn1_type(), der_encoded() | decrypt_der(), not_encrypted |
      {"DES-CBC" | "DES-EDE3-CBC",  crypto:rand_bytes(8)}}.</c></p>
@@ -207,17 +207,24 @@
       <v> Password = string() </v> 
   </type> 
   <desc> 
-    <p>Decodes a pem entry. pem_decode/1 returns a list of
-    pem entries.</p> 
+    <p>Decodes a pem entry. pem_decode/1 returns a list of pem
+    entries. Note that if the pem entry is of type
+    'SubjectPublickeyInfo' it will be further decoded to an
+    rsa_public_key() or dsa_public_key().</p>
   </desc> 
   </func>
 
    <func>
     <name>pem_entry_encode(Asn1Type, Entity [,{CipherInfo, Password}]) -> pem_entry()</name>
-    <fsummary> Creates a pem entry that can be feed to pem_encode/1.</fsummary>
+    <fsummary> Creates a pem entry that can be fed to pem_encode/1.</fsummary>
     <type>
-      <v>Asn1Type = atom()</v>
-      <v>Entity = term()</v>
+      <v>Asn1Type = pki_asn1_type()</v>
+      <v>Entity = term() - The Erlang representation of
+      <c>Asn1Type</c>.  If <c>Asn1Type</c> is 'SubjectPublicKeyInfo'
+      then <c>Entity</c> must be either an rsa_public_key() or a
+      dsa_public_key() and this function will create the appropriate
+      'SubjectPublicKeyInfo' entry.
+      </v>
       <v>CipherInfo = {"DES-CBC" | "DES-EDE3-CBC",  crypto:rand_bytes(8)}</v>
       <v>Password = string()</v> 
   </type>