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Diffstat (limited to 'crypto/rand/randfile.c')
| -rw-r--r-- | crypto/rand/randfile.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/crypto/rand/randfile.c b/crypto/rand/randfile.c new file mode 100644 index 0000000000..ad0e55db90 --- /dev/null +++ b/crypto/rand/randfile.c @@ -0,0 +1,166 @@ +/* crypto/rand/randfile.c */ +/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include <stdio.h> +#include "cryptlib.h" +#include <sys/stat.h> +#include <sys/types.h> +#include "rand.h" + +#undef BUFSIZE +#define BUFSIZE 1024 +#define RAND_DATA 1024 + +/* #define RFILE ".rand" - defined in ../../e_os.h */ + +int RAND_load_file(file,bytes) +char *file; +long bytes; + { + MS_STATIC unsigned char buf[BUFSIZE]; + struct stat sb; + int i,ret=0,n; + FILE *in; + + if (file == NULL) return(0); + + i=stat(file,&sb); + /* If the state fails, put some crap in anyway */ + RAND_seed((unsigned char *)&sb,sizeof(sb)); + ret+=sizeof(sb); + if (i < 0) return(0); + if (bytes <= 0) return(ret); + + in=fopen(file,"r"); + if (in == NULL) goto err; + for (;;) + { + n=(bytes < BUFSIZE)?(int)bytes:BUFSIZE; + i=fread(buf,1,n,in); + if (i <= 0) break; + /* even if n != i, use the full array */ + RAND_seed(buf,n); + ret+=i; + bytes-=n; + if (bytes <= 0) break; + } + fclose(in); + memset(buf,0,BUFSIZE); +err: + return(ret); + } + +int RAND_write_file(file) +char *file; + { + unsigned char buf[BUFSIZE]; + int i,ret=0; + FILE *out; + int n; + + out=fopen(file,"w"); + if (out == NULL) goto err; + chmod(file,0600); + n=RAND_DATA; + for (;;) + { + i=(n > BUFSIZE)?BUFSIZE:n; + n-=BUFSIZE; + RAND_bytes(buf,i); + i=fwrite(buf,1,i,out); + if (i <= 0) + { + ret=0; + break; + } + ret+=i; + if (n <= 0) break; + } + fclose(out); + memset(buf,0,BUFSIZE); +err: + return(ret); + } + +char *RAND_file_name(buf,size) +char *buf; +int size; + { + char *s; + char *ret=NULL; + + s=getenv("RANDFILE"); + if (s != NULL) + { + strncpy(buf,s,size-1); + buf[size-1]='\0'; + ret=buf; + } + else + { + s=getenv("HOME"); + if (s == NULL) return(RFILE); + if (((int)(strlen(s)+strlen(RFILE)+2)) > size) + return(RFILE); + strcpy(buf,s); + strcat(buf,"/"); + strcat(buf,RFILE); + ret=buf; + } + return(ret); + } |