mirror of
https://github.com/SDL-Hercules-390/hyperion.git
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92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
/* CRYPTO.C (c) Copyright Jan Jaeger, 2000-2012 */
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/* Cryptographic instructions */
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#include "hstdinc.h"
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#include "hercules.h"
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#define _CRYPTO_C_
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#if defined(FEATURE_MESSAGE_SECURITY_ASSIST)
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/*----------------------------------------------------------------------------*/
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/* Function: renew_wrapping_keys */
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/* */
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/* Each time a clear reset is performed, a new set of wrapping keys and their */
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/* associated verification patterns are generated. The contents of the two */
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/* wrapping-key registers are kept internal to the model so that no program, */
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/* including the operating system, can directly observe their clear value. */
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/*----------------------------------------------------------------------------*/
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void renew_wrapping_keys(void)
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{
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int i;
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BYTE lparname[8];
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U64 cpuid;
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srandom((unsigned)(time(0)));
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for(i = 0; i < 0x100; i++)
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srandom((unsigned)((int)random() * (int)(host_tod()&0xFFFFFFFF))); /* Randomize related to time */
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obtain_wrlock(&sysblk.wklock);
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for(i = 0; i < 32; i++)
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sysblk.wkaes_reg[i] = random()&0xFF;
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for(i = 0; i < 24; i++)
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sysblk.wkdea_reg[i] = random()&0xFF;
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/* We set the verification pattern to */
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/* cpuid (8 bytes) */
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/* lpar name (8 bytes) */
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/* lparnum (1 byte) */
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/* random number 8 bytes at the end) */
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memset(sysblk.wkvpaes_reg, 0, 32);
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memset(sysblk.wkvpdea_reg, 0, 24);
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cpuid = sysblk.cpuid;
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for(i = 0; i < 8; i++)
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{
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sysblk.wkvpaes_reg[7 - i] = cpuid & 0xff;
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sysblk.wkvpdea_reg[7 - i] = cpuid & 0xff;
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cpuid >>= 8;
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}
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get_lparname(lparname);
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memcpy(&sysblk.wkvpaes_reg[8], lparname, 8);
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memcpy(&sysblk.wkvpdea_reg[8], lparname, 8);
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sysblk.wkvpaes_reg[16] = sysblk.lparnum;
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sysblk.wkvpdea_reg[16] = sysblk.lparnum;
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for(i = 0; i < 8; i++)
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{
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sysblk.wkvpaes_reg[31 - i] = sysblk.wkvpdea_reg[23 - i] = random() & 0xff;
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}
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release_rwlock(&sysblk.wklock);
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#if 0
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#define OPTION_WRAPPINGKEYS_DEBUG
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#endif
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#ifdef OPTION_WRAPPINGKEYS_DEBUG
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char buf[128];
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MSGBUF(buf, "AES wrapping key: ");
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for(i = 0; i < 32; i++)
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snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%02X", sysblk.wkaes_reg[i]);
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WRGMSG_ON;
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buf[sizeof(buf)-1] = '\0';
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WRGMSG(HHC90190, "D", buf);
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snprintf(buf, sizeof(buf), "AES wrapping key vp: ");
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for(i = 0; i < 32; i++)
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snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%02X", sysblk.wkvpaes_reg[i]);
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buf[sizeof(buf)-1] = '\0';
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WRGMSG(HHC90190, "D", buf);
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snprintf(buf, sizeof(buf), "DEA wrapping key: ");
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for(i = 0; i < 24; i++)
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snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%02X", sysblk.wkdea_reg[i]);
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buf[sizeof(buf)-1] = '\0';
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WRGMSG(HHC90190, "D", buf);
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snprintf(buf, sizeof(buf), "DEA wrapping key vp: ");
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for(i = 0; i < 24; i++)
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snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%02X", sysblk.wkvpdea_reg[i]);
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buf[sizeof(buf)-1] = '\0';
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WRGMSG(HHC90190, "D", buf);
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WRGMSG_OFF;
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#endif
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}
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#endif /* FEATURE_MESSAGE_SECURITY_ASSIST_EXTENSION_3 */
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