320 lines
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HTML
320 lines
15 KiB
HTML
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<meta name="DC.Title" content="Example: ILE C program for certifying a public key token" />
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<meta name="abstract" content="Change this program example to suit your needs for certifying a public key token." />
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<meta name="description" content="Change this program example to suit your needs for certifying a public key token." />
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<title>Example: ILE C program for certifying a public key token</title>
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<body id="certkeyc"><a name="certkeyc"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Example: ILE C program for certifying a public key token</h1>
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<div><p>Change this program example to suit your needs for certifying a
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public key token. </p>
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<div class="section"><div class="p"><div class="note"><span class="notetitle">Note:</span> Read the <a href="codedisclaimer.htm#codedisclaimer">Code license and disclaimer information</a> for
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important legal information.</div>
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</div>
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</div>
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<div class="example"> <pre>/*-------------------------------------------------------------------*/
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/* CERTKEY */
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/* */
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/* Sample program to certify a CCA public key certificate to be */
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/* used for master key cloning. */
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/* */
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/* COPYRIGHT 5769-SS1 (C) IBM CORP. 1999, 1999 */
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/* */
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/* This material contains programming source code for your */
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/* consideration. These examples have not been thoroughly */
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/* tested under all conditions. IBM, therefore, cannot */
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/* guarantee or imply reliability, serviceability, or function */
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/* of these program. All programs contained herein are */
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/* provided to you "AS IS". THE IMPLIED WARRANTIES OF */
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/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */
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/* ARE EXPRESSLY DISCLAIMED. IBM provides no program services for */
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/* these programs and files. */
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/* */
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/* */
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/* Note: Input format is more fully described in Chapter 2 of */
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/* IBM CCA Basic Services Reference and Guide */
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/* (SC31-8609) publication. */
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/* */
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/* Parameters: FILENAME - File containing public key token */
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/* RETAINED_KEY_NAME - Name of key to certify token */
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/* */
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/* Example: */
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/* CALL PGM(CERTKEY) PARM(MYKEY.PUB CERTKEY) */
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/* */
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/* */
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/* Note: This program assumes the card with the profile is */
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/* already identified either by defaulting to the CRP01 */
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/* device or by being explicitly named using the */
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/* Cryptographic_Resource_Allocate verb. Also this */
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/* device must be varied on and you must be authorized */
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/* to use this device description. */
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/* */
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/* The Common Cryptographic Architecture (CCA) verbs used are */
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/* Digital_Signature_Generate (CSNDDSG) and One_Way_Hash (CSNBOWH). */
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/* */
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/* Use these commands to compile this program on the system: */
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/* ADDLIBLE LIB(QCCA) */
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/* CRTCMOD MODULE(CERTKEY) SRCFILE(SAMPLE) */
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/* CRTPGM PGM(CERTKEY) MODULE(CERTKEY) */
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/* BNDDIR(QCCA/QC6BNDDIR) */
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/* */
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/* Note: Authority to the CSNDDSG and CSNBOWH service programs */
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/* in the QCCA library is assumed. */
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/* */
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/*-------------------------------------------------------------------*/
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#include <stdio.h>
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#include <string.h>
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#include "csucincl.h"
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#include "decimal.h"
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extern void QDCXLATE(decimal(5,0), char *, char*, char *);
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#pragma linkage (QDCXLATE, OS, nowiden)
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int main(int argc, char *argv[])
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{
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/*------------------------------------------------------------------*/
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/* Declares for CCA parameters */
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/*------------------------------------------------------------------*/
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long return_code = 0;
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long reason_code = 0;
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long exit_data_length = 0;
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char exit_data[4];
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char rule_array[24];
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long rule_array_count;
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long token_len = 2500;
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char token[2500];
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long chaining_vector_length = 128;
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long hash_length = 20;
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long text_length;
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unsigned char chaining_vector[128];
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unsigned char hash[20];
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long signature_length = 256;
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long signature_bit_length;
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/*------------------------------------------------------------------*/
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/* Declares for working with a PKA token */
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/*------------------------------------------------------------------*/
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long pub_sec_len; /* Public section length */
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long cert_sec_len; /* Certificate section length */
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long offset; /* Offset into token */
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long tempOffset; /* (Another) Offset into token */
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long tempLength; /* Length variable */
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char name[64]; /* Private key name */
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char SAname[64]; /* Share administration or certifying */
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/* key name. */
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char SAnameASCII[64]; /* Share admin key name in ASCII */
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long SAname_length = 64; /* Length of Share admin key name */
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long count; /* Number of bytes read from file */
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decimal(5,0) xlate_length = 64; /* Packed decimal variable */
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/* needed for call to QDCXLATE. */
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FILE *fp; /* File pointer */
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if (argc < 3) /* Check the number of parameters passed */
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{
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printf("Need to enter a public key name and SA key\n");
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return 1;
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}
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name[0] = 0; /* Make copy of name parameters */
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strcpy(name,argv[1]);
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memset(SAname, ' ', 64); /* Make copy of Share Admin key name */
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memcpy(SAname,argv[2],strlen(argv[2]));
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fp = fopen(name,"rb"); /* Open the file containing the token */
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if (!fp)
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{
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printf("File %s not found.\n",argv[1]);
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return 1;
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}
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memset(token,0,2500); /* Read the token from the file */
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count = fread(token,1,2500,fp);
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fclose(fp);
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/* Determine length of token from length */
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/* bytes at offset 2 and 3. */
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token_len = ((256 * token[2]) + token[3]);
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if (count < token_len) /* Check if whole token was read in */
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{
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printf("Incomplete token in file\n");
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return 1;
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}
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/************************************************************/
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/* Find the certificate offset in the token */
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/* */
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/* The layout of the token is */
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/* */
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/* - Token header - 8 bytes - including 2 length bytes */
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/* - Public key section - length bytes at offset 10 overall */
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/* - Private key name - 68 bytes */
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/* - Certificate section */
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/* */
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/************************************************************/
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pub_sec_len = ((256 * token[10]) + token[11]);
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offset = pub_sec_len + 68 + 8; /* Set offset to certiicate section */
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/* Determine certificate section */
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/* length from the length bytes at */
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/* offset 2 of the section. */
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cert_sec_len = ((256 * token[offset + 2]) + token[offset + 3]);
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tempOffset = offset + 4; /* Set offset to first subsection */
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/*-----------------------------------------------------*/
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/* Parse each subsection of the certificate until the */
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/* signature subsection is found or the end is reached.*/
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/* (Identifier for signature subsection is Hex 45.) */
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/*-----------------------------------------------------*/
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while(token[tempOffset] != 0x45 &&
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tempOffset < offset + cert_sec_len)
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{
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tempOffset += 256 * token[tempOffset + 2] + token[tempOffset+3];
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}
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/*----------------------------------------------------*/
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/* Check if no signature was found before the end of */
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/* the certificate section. */
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/*----------------------------------------------------*/
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if (token[tempOffset] != 0x45)
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{
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printf("Invalid certificate\n");
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return 1;
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}
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/*******************************************************/
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/* Replace Private key name in certificate with the */
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/* Share admin key name (expressed in ASCII). */
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/*******************************************************/
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text_length = tempOffset - offset + 70;
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memcpy(SAnameASCII,SAname,64);
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/*----------------------------------------------------*/
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/* Convert the Share Admin key name to ASCII */
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/*----------------------------------------------------*/
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QDCXLATE(xlate_length, SAnameASCII, "QASCII ", "QSYS ");
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memcpy(&token[tempOffset + 6], SAnameASCII, 64);
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/**************************************************************/
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/* Hash the certificate */
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/**************************************************************/
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memcpy((void*)rule_array,"SHA-1 ",8);
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rule_array_count = 1;
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chaining_vector_length = 128;
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hash_length = 20;
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CSNBOWH( &return_code, &reason_code, &exit_data_length,
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exit_data,
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&rule_array_count,
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(unsigned char*)rule_array,
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&text_length,
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&token[offset],
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&chaining_vector_length,
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chaining_vector,
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&hash_length,
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hash);
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if (return_code != 0)
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{
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printf("One_Way_Hash Failed : return reason %d/%d\n",
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return_code, reason_code);
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return 1;
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}
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/**************************************************************/
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/* Create a signature */
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/**************************************************************/
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memcpy((void*)rule_array,"ISO-9796",8);
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rule_array_count = 1;
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CSNDDSG( &return_code, &reason_code, &exit_data_length,
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exit_data,
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&rule_array_count,
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(unsigned char*)rule_array,
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&SAname_length,
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SAname,
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&hash_length,
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hash,
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&signature_length,
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&signature_bit_length,
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&token[tempOffset+70]);
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if (return_code != 0)
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{
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printf("Digital Signature Generate Failed : return reason %d/%d\n",
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return_code, reason_code);
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return 1;
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}
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/*-----------------------------------------------*/
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/* Check if the new signature is longer than the */
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/* original signature */
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/*-----------------------------------------------*/
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if((token[tempOffset + 2] * 256 + token[tempOffset + 3]) - 70 !=
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signature_length)
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{
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printf("Signature Length change from %d to %d.\n",
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token[tempOffset + 2] * 256 + token[tempOffset + 3] - 70,
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signature_length);
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/* Adjust length in signature subsection */
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token[tempOffset + 2] = signature_length >> 8;
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token[tempOffset + 3] = signature_length;
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/* Adjust length in certificate section */
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token[offset + 2] = (text_length + signature_length) >> 8;
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token[offset + 3] = text_length + signature_length;
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/* Adjust length in token header section */
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tempLength = 8 + pub_sec_len + 68 + text_length +
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signature_length;
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token[2] = tempLength >> 8;
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token[3] = tempLength;
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}
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else tempLength = token[2] * 256 + token[3];
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/********************************************/
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/* Write certified public key out to a file */
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/********************************************/
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strcat(name,".CRT"); /* Append .CRP to filename */
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fp = fopen(name,"wb"); /* Open the certificate file */
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if (!fp)
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{
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printf("File open failed for output\n");
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}
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else
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{
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fwrite(token, 1, tempLength, fp);
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fclose(fp);
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printf("Public token written to file %s.\n",name);
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}
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}</pre>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzajcworking.htm" title="After you set up your Cryptographic Coprocessor, you can begin writing programs to make use of your Cryptographic Coprocessor's cryptographic functions.">Manage the Cryptographic Coprocessor</a></div>
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