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158 lines
3.5 KiB
C
158 lines
3.5 KiB
C
/*
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* Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/opensslconf.h>
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#ifdef OPENSSL_NO_EGD
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NON_EMPTY_TRANSLATION_UNIT
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#else
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# include <openssl/crypto.h>
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# include <openssl/e_os2.h>
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# include <openssl/rand.h>
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/*
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* Query an EGD
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*/
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# if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_VOS) || defined(OPENSSL_SYS_UEFI)
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int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
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{
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return -1;
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}
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int RAND_egd(const char *path)
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{
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return -1;
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}
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int RAND_egd_bytes(const char *path, int bytes)
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{
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return -1;
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}
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# else
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# include OPENSSL_UNISTD
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# include <stddef.h>
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# include <sys/types.h>
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# include <sys/socket.h>
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# ifndef NO_SYS_UN_H
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# ifdef OPENSSL_SYS_VXWORKS
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# include <streams/un.h>
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# else
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# include <sys/un.h>
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# endif
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# else
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struct sockaddr_un {
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short sun_family; /* AF_UNIX */
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char sun_path[108]; /* path name (gag) */
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};
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# endif /* NO_SYS_UN_H */
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# include <string.h>
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# include <errno.h>
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int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
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{
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FILE *fp = NULL;
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struct sockaddr_un addr;
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int mybuffer, ret = -1, i, numbytes, fd;
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unsigned char tempbuf[255];
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if (bytes > (int)sizeof(tempbuf))
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return -1;
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/* Make socket. */
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memset(&addr, 0, sizeof(addr));
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addr.sun_family = AF_UNIX;
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if (strlen(path) >= sizeof(addr.sun_path))
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return -1;
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strcpy(addr.sun_path, path);
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i = offsetof(struct sockaddr_un, sun_path) + strlen(path);
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fd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (fd == -1 || (fp = fdopen(fd, "r+")) == NULL)
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return -1;
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setbuf(fp, NULL);
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/* Try to connect */
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for ( ; ; ) {
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if (connect(fd, (struct sockaddr *)&addr, i) == 0)
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break;
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# ifdef EISCONN
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if (errno == EISCONN)
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break;
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# endif
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switch (errno) {
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# ifdef EINTR
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case EINTR:
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# endif
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# ifdef EAGAIN
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case EAGAIN:
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# endif
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# ifdef EINPROGRESS
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case EINPROGRESS:
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# endif
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# ifdef EALREADY
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case EALREADY:
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# endif
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/* No error, try again */
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break;
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default:
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ret = -1;
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goto err;
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}
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}
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/* Make request, see how many bytes we can get back. */
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tempbuf[0] = 1;
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tempbuf[1] = bytes;
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if (fwrite(tempbuf, sizeof(char), 2, fp) != 2 || fflush(fp) == EOF)
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goto err;
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if (fread(tempbuf, sizeof(char), 1, fp) != 1 || tempbuf[0] == 0)
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goto err;
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numbytes = tempbuf[0];
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/* Which buffer are we using? */
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mybuffer = buf == NULL;
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if (mybuffer)
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buf = tempbuf;
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/* Read bytes. */
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i = fread(buf, sizeof(char), numbytes, fp);
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if (i < numbytes)
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goto err;
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ret = numbytes;
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if (mybuffer)
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RAND_add(tempbuf, i, i);
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err:
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if (fp != NULL)
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fclose(fp);
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return ret;
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}
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int RAND_egd_bytes(const char *path, int bytes)
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{
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int num;
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num = RAND_query_egd_bytes(path, NULL, bytes);
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if (num < 0)
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return -1;
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if (RAND_status() != 1)
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return -1;
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return num;
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}
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int RAND_egd(const char *path)
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{
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return RAND_egd_bytes(path, 255);
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}
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# endif
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#endif
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