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diff --git a/configure.in b/configure.in
index cb43246..0bb6b0d 100644
--- httpd-2.4.43/configure.in.r1861793+
+++ httpd-2.4.43/configure.in
@@ -465,6 +465,28 @@
AC_SEARCH_LIBS(crypt, crypt)
CRYPT_LIBS="$LIBS"
APACHE_SUBST(CRYPT_LIBS)
+
+if test "$ac_cv_search_crypt" != "no"; then
+ # Test crypt() with the SHA-512 test vector from https://akkadia.org/drepper/SHA-crypt.txt
+ AC_CACHE_CHECK([whether crypt() supports SHA-2], [ap_cv_crypt_sha2], [
+ AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+#include <crypt.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define PASSWD_0 "Hello world!"
+#define SALT_0 "\$6\$saltstring"
+#define EXPECT_0 "\$6\$saltstring\$svn8UoSVapNtMuq1ukKS4tPQd8iKwSMHWjl/O817G3uBnIFNjnQJu" \
+ "esI68u4OTLiBFdcbYEdFCoEOfaS35inz1"
+]], [char *result = crypt(PASSWD_0, SALT_0);
+ if (!result) return 1;
+ if (strcmp(result, EXPECT_0)) return 2;
+])], [ap_cv_crypt_sha2=yes], [ap_cv_crypt_sha2=no])])
+ if test "$ap_cv_crypt_sha2" = yes; then
+ AC_DEFINE([HAVE_CRYPT_SHA2], 1, [Define if crypt() supports SHA-2 hashes])
+ fi
+fi
+
LIBS="$saved_LIBS"
dnl See Comment #Spoon
--- httpd-2.4.43/docs/man/htpasswd.1.r1861793+
+++ httpd-2.4.43/docs/man/htpasswd.1
@@ -27,16 +27,16 @@
.SH "SYNOPSIS"
.PP
-\fB\fBhtpasswd\fR [ -\fBc\fR ] [ -\fBi\fR ] [ -\fBm\fR | -\fBB\fR | -\fBd\fR | -\fBs\fR | -\fBp\fR ] [ -\fBC\fR \fIcost\fR ] [ -\fBD\fR ] [ -\fBv\fR ] \fIpasswdfile\fR \fIusername\fR\fR
+\fB\fBhtpasswd\fR [ -\fBc\fR ] [ -\fBi\fR ] [ -\fBm\fR | -\fBB\fR | -\fB2\fR | -\fB5\fR | -\fBd\fR | -\fBs\fR | -\fBp\fR ] [ -\fBr\fR \fIrounds\fR ] [ -\fBC\fR \fIcost\fR ] [ -\fBD\fR ] [ -\fBv\fR ] \fIpasswdfile\fR \fIusername\fR\fR
.PP
-\fB\fBhtpasswd\fR -\fBb\fR [ -\fBc\fR ] [ -\fBm\fR | -\fBB\fR | -\fBd\fR | -\fBs\fR | -\fBp\fR ] [ -\fBC\fR \fIcost\fR ] [ -\fBD\fR ] [ -\fBv\fR ] \fIpasswdfile\fR \fIusername\fR \fIpassword\fR\fR
+\fB\fBhtpasswd\fR -\fBb\fR [ -\fBc\fR ] [ -\fBm\fR | -\fBB\fR | -\fB2\fR | -\fB5\fR | -\fBd\fR | -\fBs\fR | -\fBp\fR ] [ -\fBr\fR \fIrounds\fR ] [ -\fBC\fR \fIcost\fR ] [ -\fBD\fR ] [ -\fBv\fR ] \fIpasswdfile\fR \fIusername\fR \fIpassword\fR\fR
.PP
-\fB\fBhtpasswd\fR -\fBn\fR [ -\fBi\fR ] [ -\fBm\fR | -\fBB\fR | -\fBd\fR | -\fBs\fR | -\fBp\fR ] [ -\fBC\fR \fIcost\fR ] \fIusername\fR\fR
+\fB\fBhtpasswd\fR -\fBn\fR [ -\fBi\fR ] [ -\fBm\fR | -\fBB\fR | -\fB2\fR | -\fB5\fR | -\fBd\fR | -\fBs\fR | -\fBp\fR ] [ -\fBr\fR \fIrounds\fR ] [ -\fBC\fR \fIcost\fR ] \fIusername\fR\fR
.PP
-\fB\fBhtpasswd\fR -\fBnb\fR [ -\fBm\fR | -\fBB\fR | -\fBd\fR | -\fBs\fR | -\fBp\fR ] [ -\fBC\fR \fIcost\fR ] \fIusername\fR \fIpassword\fR\fR
+\fB\fBhtpasswd\fR -\fBnb\fR [ -\fBm\fR | -\fBB\fR | -\fB2\fR | -\fB5\fR | -\fBd\fR | -\fBs\fR | -\fBp\fR ] [ -\fBr\fR \fIrounds\fR ] [ -\fBC\fR \fIcost\fR ] \fIusername\fR \fIpassword\fR\fR
.SH "SUMMARY"
@@ -48,7 +48,7 @@
Resources available from the Apache HTTP server can be restricted to just the users listed in the files created by \fBhtpasswd\fR\&. This program can only manage usernames and passwords stored in a flat-file\&. It can encrypt and display password information for use in other types of data stores, though\&. To use a DBM database see dbmmanage or htdbm\&.
.PP
-\fBhtpasswd\fR encrypts passwords using either bcrypt, a version of MD5 modified for Apache, SHA1, or the system's \fBcrypt()\fR routine\&. Files managed by \fBhtpasswd\fR may contain a mixture of different encoding types of passwords; some user records may have bcrypt or MD5-encrypted passwords while others in the same file may have passwords encrypted with \fBcrypt()\fR\&.
+\fBhtpasswd\fR encrypts passwords using either bcrypt, a version of MD5 modified for Apache, SHA-1, or the system's \fBcrypt()\fR routine\&. SHA-2-based hashes (SHA-256 and SHA-512) are supported for \fBcrypt()\fR\&. Files managed by \fBhtpasswd\fR may contain a mixture of different encoding types of passwords; some user records may have bcrypt or MD5-encrypted passwords while others in the same file may have passwords encrypted with \fBcrypt()\fR\&.
.PP
This manual page only lists the command line arguments\&. For details of the directives necessary to configure user authentication in httpd see the Apache manual, which is part of the Apache distribution or can be found at http://httpd\&.apache\&.org/\&.
@@ -73,17 +73,26 @@
\fB-m\fR
Use MD5 encryption for passwords\&. This is the default (since version 2\&.2\&.18)\&.
.TP
+\fB-2\fR
+Use SHA-256 \fBcrypt()\fR based hashes for passwords\&. This is supported on most Unix platforms\&.
+.TP
+\fB-5\fR
+Use SHA-512 \fBcrypt()\fR based hashes for passwords\&. This is supported on most Unix platforms\&.
+.TP
\fB-B\fR
Use bcrypt encryption for passwords\&. This is currently considered to be very secure\&.
.TP
\fB-C\fR
This flag is only allowed in combination with \fB-B\fR (bcrypt encryption)\&. It sets the computing time used for the bcrypt algorithm (higher is more secure but slower, default: 5, valid: 4 to 17)\&.
.TP
+\fB-r\fR
+This flag is only allowed in combination with \fB-2\fR or \fB-5\fR\&. It sets the number of hash rounds used for the SHA-2 algorithms (higher is more secure but slower; the default is 5,000)\&.
+.TP
\fB-d\fR
Use \fBcrypt()\fR encryption for passwords\&. This is not supported by the httpd server on Windows and Netware\&. This algorithm limits the password length to 8 characters\&. This algorithm is \fBinsecure\fR by today's standards\&. It used to be the default algorithm until version 2\&.2\&.17\&.
.TP
\fB-s\fR
-Use SHA encryption for passwords\&. Facilitates migration from/to Netscape servers using the LDAP Directory Interchange Format (ldif)\&. This algorithm is \fBinsecure\fR by today's standards\&.
+Use SHA-1 (160-bit) encryption for passwords\&. Facilitates migration from/to Netscape servers using the LDAP Directory Interchange Format (ldif)\&. This algorithm is \fBinsecure\fR by today's standards\&.
.TP
\fB-p\fR
Use plaintext passwords\&. Though \fBhtpasswd\fR will support creation on all platforms, the httpd daemon will only accept plain text passwords on Windows and Netware\&.
@@ -152,10 +161,13 @@
When using the \fBcrypt()\fR algorithm, note that only the first 8 characters of the password are used to form the password\&. If the supplied password is longer, the extra characters will be silently discarded\&.
.PP
-The SHA encryption format does not use salting: for a given password, there is only one encrypted representation\&. The \fBcrypt()\fR and MD5 formats permute the representation by prepending a random salt string, to make dictionary attacks against the passwords more difficult\&.
+The SHA-1 encryption format does not use salting: for a given password, there is only one encrypted representation\&. The \fBcrypt()\fR and MD5 formats permute the representation by prepending a random salt string, to make dictionary attacks against the passwords more difficult\&.
+
+.PP
+The SHA-1 and \fBcrypt()\fR formats are insecure by today's standards\&.
.PP
-The SHA and \fBcrypt()\fR formats are insecure by today's standards\&.
+The SHA-2-based \fBcrypt()\fR formats (SHA-256 and SHA-512) are supported on most modern Unix systems, and follow the specification at https://www\&.akkadia\&.org/drepper/SHA-crypt\&.txt\&.
.SH "RESTRICTIONS"
--- httpd-2.4.43/support/htpasswd.c.r1861793+
+++ httpd-2.4.43/support/htpasswd.c
@@ -109,17 +109,21 @@
"for it." NL
" -i Read password from stdin without verification (for script usage)." NL
" -m Force MD5 encryption of the password (default)." NL
- " -B Force bcrypt encryption of the password (very secure)." NL
+ " -2 Force SHA-256 crypt() hash of the password (very secure)." NL
+ " -5 Force SHA-512 crypt() hash of the password (very secure)." NL
+ " -B Force bcrypt encryption of the password (very secure)." NL
" -C Set the computing time used for the bcrypt algorithm" NL
" (higher is more secure but slower, default: %d, valid: 4 to 17)." NL
+ " -r Set the number of rounds used for the SHA-256, SHA-512 algorithms" NL
+ " (higher is more secure but slower, default: 5000)." NL
" -d Force CRYPT encryption of the password (8 chars max, insecure)." NL
- " -s Force SHA encryption of the password (insecure)." NL
+ " -s Force SHA-1 encryption of the password (insecure)." NL
" -p Do not encrypt the password (plaintext, insecure)." NL
" -D Delete the specified user." NL
" -v Verify password for the specified user." NL
"On other systems than Windows and NetWare the '-p' flag will "
"probably not work." NL
- "The SHA algorithm does not use a salt and is less secure than the "
+ "The SHA-1 algorithm does not use a salt and is less secure than the "
"MD5 algorithm." NL,
BCRYPT_DEFAULT_COST
);
@@ -178,7 +182,7 @@
if (rv != APR_SUCCESS)
exit(ERR_SYNTAX);
- while ((rv = apr_getopt(state, "cnmspdBbDiC:v", &opt, &opt_arg)) == APR_SUCCESS) {
+ while ((rv = apr_getopt(state, "cnmspdBbDi25C:r:v", &opt, &opt_arg)) == APR_SUCCESS) {
switch (opt) {
case 'c':
*mask |= APHTP_NEWFILE;
--- httpd-2.4.43/support/passwd_common.c.r1861793+
+++ httpd-2.4.43/support/passwd_common.c
@@ -179,16 +179,21 @@
int mkhash(struct passwd_ctx *ctx)
{
char *pw;
- char salt[16];
+ char salt[17];
apr_status_t rv;
int ret = 0;
#if CRYPT_ALGO_SUPPORTED
char *cbuf;
#endif
+#ifdef HAVE_CRYPT_SHA2
+ const char *setting;
+ char method;
+#endif
- if (ctx->cost != 0 && ctx->alg != ALG_BCRYPT) {
+ if (ctx->cost != 0 && ctx->alg != ALG_BCRYPT
+ && ctx->alg != ALG_CRYPT_SHA256 && ctx->alg != ALG_CRYPT_SHA512 ) {
apr_file_printf(errfile,
- "Warning: Ignoring -C argument for this algorithm." NL);
+ "Warning: Ignoring -C/-r argument for this algorithm." NL);
}
if (ctx->passwd == NULL) {
@@ -246,6 +251,34 @@
break;
#endif /* CRYPT_ALGO_SUPPORTED */
+#ifdef HAVE_CRYPT_SHA2
+ case ALG_CRYPT_SHA256:
+ case ALG_CRYPT_SHA512:
+ ret = generate_salt(salt, 16, &ctx->errstr, ctx->pool);
+ if (ret != 0)
+ break;
+
+ method = ctx->alg == ALG_CRYPT_SHA256 ? '5': '6';
+
+ if (ctx->cost)
+ setting = apr_psprintf(ctx->pool, "$%c$rounds=%d$%s",
+ method, ctx->cost, salt);
+ else
+ setting = apr_psprintf(ctx->pool, "$%c$%s",
+ method, salt);
+
+ cbuf = crypt(pw, setting);
+ if (cbuf == NULL) {
+ rv = APR_FROM_OS_ERROR(errno);
+ ctx->errstr = apr_psprintf(ctx->pool, "crypt() failed: %pm", &rv);
+ ret = ERR_PWMISMATCH;
+ break;
+ }
+
+ apr_cpystrn(ctx->out, cbuf, ctx->out_len - 1);
+ break;
+#endif /* HAVE_CRYPT_SHA2 */
+
#if BCRYPT_ALGO_SUPPORTED
case ALG_BCRYPT:
rv = apr_generate_random_bytes((unsigned char*)salt, 16);
@@ -294,6 +327,19 @@
case 's':
ctx->alg = ALG_APSHA;
break;
+#ifdef HAVE_CRYPT_SHA2
+ case '2':
+ ctx->alg = ALG_CRYPT_SHA256;
+ break;
+ case '5':
+ ctx->alg = ALG_CRYPT_SHA512;
+ break;
+#else
+ case '2':
+ case '5':
+ ctx->errstr = "SHA-2 crypt() algorithms are not supported on this platform.";
+ return ERR_ALG_NOT_SUPP;
+#endif
case 'p':
ctx->alg = ALG_PLAIN;
#if !PLAIN_ALGO_SUPPORTED
@@ -324,11 +370,12 @@
return ERR_ALG_NOT_SUPP;
#endif
break;
- case 'C': {
+ case 'C':
+ case 'r': {
char *endptr;
long num = strtol(opt_arg, &endptr, 10);
if (*endptr != '\0' || num <= 0) {
- ctx->errstr = "argument to -C must be a positive integer";
+ ctx->errstr = "argument to -C/-r must be a positive integer";
return ERR_SYNTAX;
}
ctx->cost = num;
--- httpd-2.4.43/support/passwd_common.h.r1861793+
+++ httpd-2.4.43/support/passwd_common.h
@@ -28,6 +28,8 @@
#include "apu_version.h"
#endif
+#include "ap_config_auto.h"
+
#define MAX_STRING_LEN 256
#define ALG_PLAIN 0
@@ -35,6 +37,8 @@
#define ALG_APMD5 2
#define ALG_APSHA 3
#define ALG_BCRYPT 4
+#define ALG_CRYPT_SHA256 5
+#define ALG_CRYPT_SHA512 6
#define BCRYPT_DEFAULT_COST 5
@@ -84,7 +88,7 @@
apr_size_t out_len;
char *passwd;
int alg;
- int cost;
+ int cost; /* cost for bcrypt, rounds for SHA-2 */
enum {
PW_PROMPT = 0,
PW_ARG,
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