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Code
By	garethheyes (Root)
Tag Name	pgp_info
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Help	Code by Robert Graham, decodes the public section of a PGP base64 encoded string, key, or signature.

function myBase64Decode(str,is_binary){var result="";var i=0;var x;var shiftreg=0;var count=-1;for(i=0;i<str.length;i++){c=str.charAt(i);if('A'<=c&&c<='Z')x=str.charCodeAt(i)-65;else if('a'<=c&&c<='z')x=str.charCodeAt(i)-97+26;else if('0'<=c&&c<='9')x=str.charCodeAt(i)-48+52;else if(c=='+')x=62;else if(c=='/')x=63;else continue;count++;switch(count%4){case 0:shiftreg=x;continue;case 1:v=(shiftreg<<2)\|(x>>4);shiftreg=x&0x0F;break;case 2:v=(shiftreg<<4)\|(x>>2);shiftreg=x&0x03;break;case 3:v=(shiftreg<<6)\|(x>>0);shiftreg=x&0x00;break;}if(!is_binary&&(v<32\|\|v>126)&&(v!=0x0d)&&(v!=0x0a)){result=result+"<";result=result+"0123456789ABCDEF".charAt((v/16)&0x0F);result=result+"0123456789ABCDEF".charAt((v/1)&0x0F);result=result+">";}else result=result+String.fromCharCode(v);}return result.toString();}function myNbtDecode(str){var result="";var i=0;var x;var shiftreg=0;var count=-1;for(i=0;i<str.length;i++){c=str.charAt(i);if('A'<=c&&c<='Z')x=str.charCodeAt(i)-65;else if('a'<=c&&c<='z')x=str.charCodeAt(i)-97;else continue;count++;switch(count%2){case 0:shiftreg=x;continue;case 1:v=(shiftreg<<2)\|(x);shiftreg=0;break;}result=result+String.fromCharCode(v);}return result.toString();}function myUrlDecode(str,fld){fld.value=myBase64Decode(str,false);}var PacketTags=new Array("Reserved - a packet tag must not have this value","Public-Key Encrypted Session Key Packet","Signature Packet","Symmetric-Key Encrypted Session Key Packet","One-Pass Signature Packet","Secret Key Packet","Public Key Packet","Secret Subkey Packet","Compressed Data Packet","Symmetrically Encrypted Data Packet","Marker Packet","Literal Data Packet","Trust Packet","User ID Packet","Public Subkey Packet","Private or Experimental Values");var HashAlgorithm=new Array("UNKNOWN","MD5","SHA1","RIPEMD160","double-width SHA","MD2","TIGER192","HAVAL-5-160");var CompressionAlgorithm=new Array("Uncompressed","ZIP (RFC 1951)","ZLIB (RFC 1950)");function hexcode(x){var result="";result=result+"0123456789ABCDEF".charAt((x/16)&0x0F);result=result+"0123456789ABCDEF".charAt((x/1)&0x0F);return result;}function hexdump(str,i,max){var result="";var start=i;var ascii_dump="";if(max<=0)max=str.length;while(i<str.length&&i<max){var c=str.charCodeAt(i);result=result+hexcode(c);if(c>32&&c<127)ascii_dump=ascii_dump+str.charAt(i);else ascii_dump=ascii_dump+'.';if(((i-start)%8)==7)result=result+" ";if(((i-start)%16)==15){result=result+" "+ascii_dump+"\n";ascii_dump="";}i++;}while(((i-start)%16)!=15){result=result+" ";if(((i-start)%8)==7)result=result+" ";ascii_dump=ascii_dump+" ";i++;}result=result+" "+ascii_dump+"\n";return result;}function publicKeyAlgorithm(x){var result="";switch(x){case 1:result=result+"RSA Encrypt or Sign";break;case 2:result=result+"RSA Encrypt-Only";break;case 3:result=result+"RSA Sign-Only";break;case 16:result=result+"Elgamal Encrypt-Only";break;case 17:result=result+"DSA";break;case 18:result=result+"Elliptic Curve";break;case 19:result=result+"ECDSA";break;case 20:result=result+"Elgamal Encrypt or Sign";break;case 21:result=result+"Diffie-Hellman (X9.42) for IETF-S/MIME";break;default:result=result+"UNKNOWN";break;}return result;}function myPGPdecodeKey(str,i){var x=0;var result="";var sig_version=str.charCodeAt(i++);result=result+"Sig-Version = "+sig_version+"\n";x=str.charCodeAt(i)<<24\|str.charCodeAt(i+1)<<16\|str.charCodeAt(i+2)<<8\|str.charCodeAt(i+3);var creation_time=new Date();creation_time.setTime(x1000);result=result+"Creation-Time = "+creation_time+"\n";i=i+4;switch(sig_version){case 3:x=str.charCodeAt(i)<<16\|str.charCodeAt(i+1);if(x==0)result=result+"Expiration = never\n";else result=result+"Expiration = "+x+" days\n";i=i+2;break;}x=str.charCodeAt(i++);result=result+"Public-Key-Algorithm = "+x+" ("+publicKeyAlgorithm(x)+")\n";switch(x){case 1:var bit_count=0;var byte_count=0;bit_count=str.charCodeAt(i+0)<<8\|str.charCodeAt(i+1);byte_count=bit_count;while(byte_count%8)byte_count++;byte_count=byte_count/8;i=i+2;result=result+"Product (N) of two primes = "+bit_count+" bits\n";i=i+byte_count;bit_count=str.charCodeAt(i+0)<<8\|str.charCodeAt(i+1);byte_count=bit_count;while(byte_count%8)byte_count++;byte_count=byte_count/8;i=i+2;switch(byte_count){case 1:x=str.charCodeAt(i);result=result+"Public-Exponent (e) = "+x+"\n";break;case 2:x=str.charCodeAt(i+0)<<8\|str.charCodeAt(i+1);result=result+"Public-Exponent (e) = "+x+"\n";break;default:result=result+"Public-Exponent:\n";result=result+hexdump(str,i,i+byte_count);break;}i=i+byte_count;result=result+hexdump(str,i,0);break;case 17:result=result+"DSA-Prime-p = "+mpi_integer(str,i)+mpi_bits(str,i)+"\n";i=i+mpi_length(str,i);result=result+"DSA-Group-Order-q = "+mpi_integer(str,i)+mpi_bits(str,i)+"\n";i=i+mpi_length(str,i);result=result+"DSA-Group-Gen-g = "+mpi_integer(str,i)+mpi_bits(str,i)+"\n";i=i+mpi_length(str,i);result=result+"DSA-Key-Val-y = "+mpi_integer(str,i)+mpi_bits(str,i)+"\n";i=i+mpi_length(str,i);result=result+hexdump(str,i,0);break;default:result=result+"Public-Key Data:\n";result=result+hexdump(str,i,0);}return result;}function mpi_bits(str,i){var bit_count=0;bit_count=str.charCodeAt(i+0)<<8\|str.charCodeAt(i+1);return" ("+bit_count+"-bits)";}function mpi_integer(str,i){var bit_count=0;var byte_count=0;var integer=0;bit_count=str.charCodeAt(i+0)<<8\|str.charCodeAt(i+1);byte_count=bit_count;while(byte_count%8)byte_count++;byte_count=byte_count/8;i=i+2;while(i<str.length&&byte_count){integer=integer256+str.charCodeAt(i);i++;byte_count=byte_count-1;}return integer;}function mpi_length(str,i){var bit_count=0;var byte_count=0;var integer=0;bit_count=str.charCodeAt(i+0)<<8\|str.charCodeAt(i+1);byte_count=bit_count;while(byte_count%8)byte_count++;byte_count=byte_count/8;return byte_count+2;}function decode_compressed_packet(str,i,len){var result="";var x=0;x=str.charCodeAt(i++);result=result+"Compression-Algorithm = "+x+" ("+CompressionAlgorithm[x]+")\n";result=result+"---- Compressed Data ----\n";result=result+hexdump(str,i,0);return result;}function decode_new_pgp(str,i,content_tag,len){var result="";switch(content_tag){case 8:result=result+decode_compressed_packet(str,i,len);break;default:result=result+"---- UNKNOWN DECODE ----\n";result=result+hexdump(str,i,0);}return result;}function myPGPdecode(strx){var result="";var str="xxx";var i=0;str=myBase64Decode(strx,true);str.toString();if(str.length<10)return"sig too small "+str;var tag=str.charCodeAt(i);i++;var content_tag=0;var length_type=-1;var len=0;if(tag&0x80!=0x80)return"Invalid tag\n";if((tag&0xC0)==0xC0){result=result+"Format = new 5.x OpenPGP format\n";content_tag=tag&0x3F;result=result+"Content-Tag = "+content_tag+" ";if(content_tag<14)result=result+"("+PacketTags[content_tag]+")";result=result+"\n";len=str.charCodeAt(i++);if(len==255){len=str.charCodeAt(i)<<24\|str.charCodeAt(i+1)<<16\|str.charCodeAt(i+2)<<8\|str.charCodeAt(i+3);}else if(len>191){len=(len-192)<<8+str.charCodeAt(i++)+192;}result=result+"Length = "+len+" bytes\n";result=result+decode_new_pgp(str,i,content_tag,len);return result;}else {result=result+"Format = old 2.x format\n";content_tag=(tag>>2)&0x0F;length_type=tag&0x03;result=result+"Content-Tag = "+content_tag+" ";if(content_tag<14)result=result+"("+PacketTags[content_tag]+")";result=result+"\n";if(length_type==0){len=str.charCodeAt(i);i=i+1;}else if(length_type==1){len=str.charCodeAt(i)<<8\|str.charCodeAt(i+1);i=i+2;}result=result+"Length = "+len+" bytes\n";}if(content_tag==2){var sig_version=str.charCodeAt(i++);var x=0;switch(sig_version){case 1:case 3:result=result+"Sig-Version = "+sig_version+"\n";x=str.charCodeAt(i++);if(x!=5){result=result+"Expected val=5, found "+x+"\n";return result;}x=str.charCodeAt(i++);result=result+"Sig-Type = "+x;switch(x){case 0x00:result=result+" (Signature of a binary document.)\n";break;case 0x01:result=result+" (Signature of a canonical text document.)\n";break;case 0x02:result=result+" (Standalone signature.)\n";break;case 0x10:result=result+" (Generic certification of a User ID and Public Key packet.)\n";break;case 0x11:result=result+" (Persona certification of a User ID and Public Key packet.)\n";break;case 0x12:result=result+" (Casual certification of a User ID and Public Key packet.)\n";break;case 0x13:result=result+" (Positive certification of a User ID and Public Key packet.)\n";break;case 0x18:result=result+" (Subkey Binding Signature)\n";break;case 0x1F:result=result+" (Signature directly on a key)\n";break;case 0x20:result=result+" (Key revocation signature)\n";break;case 0x28:result=result+" (Subkey revocation signature)\n";break;case 0x30:result=result+" (Certification revocation signature)\n";break;case 0x40:result=result+" (Timestamp signature.)\n";break;default:result=result+"(unknown)\n";break;}x=str.charCodeAt(i)<<24\|str.charCodeAt(i+1)<<16\|str.charCodeAt(i+2)<<8\|str.charCodeAt(i+3);var creation_time=new Date();creation_time.setTime(x*1000);result=result+"Creation-Time = "+creation_time+"\n";i=i+4;result=result+"KeyID = 0x";for(j=0;j<8;j++){x=str.charCodeAt(i++);result=result+hexcode(x);}result=result+"\n";x=str.charCodeAt(i++);result=result+"Public-Key-Algorithm = "+x+" ("+publicKeyAlgorithm(x)+")\n";x=str.charCodeAt(i++);result=result+"Hash-Algorithm = "+x+" ("+HashAlgorithm[x]+")\n";x=str.charCodeAt(i++);result=result+"Q-hash = 0x"+hexcode(x);x=str.charCodeAt(i++);result=result+hexcode(x)+"\n";result=result+"Signature data:\n";result=result+hexdump(str,i,0);break;default:result=result+"Sig-Version = "+sig_version+"(UNKNOWN)\n";}}else if(content_tag==6){result=result+"---- KEY ----\n";result=result+myPGPdecodeKey(str,i);}else {result=result+"---- UNDECODED CONTENTS ----\n";}return result;} (function(){ return myPGPdecode(code); })();

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