272 lines
12 KiB
Diff
272 lines
12 KiB
Diff
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diff --git a/configure.in b/configure.in
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index cb43246..0bb6b0d 100644
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--- httpd-2.4.43/configure.in.r1861793+
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+++ httpd-2.4.43/configure.in
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@@ -465,6 +465,28 @@
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AC_SEARCH_LIBS(crypt, crypt)
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CRYPT_LIBS="$LIBS"
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APACHE_SUBST(CRYPT_LIBS)
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+
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+if test "$ac_cv_search_crypt" != "no"; then
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+ # Test crypt() with the SHA-512 test vector from https://akkadia.org/drepper/SHA-crypt.txt
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+ AC_CACHE_CHECK([whether crypt() supports SHA-2], [ap_cv_crypt_sha2], [
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+ AC_RUN_IFELSE([AC_LANG_PROGRAM([[
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+#include <crypt.h>
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+#include <stdlib.h>
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+#include <string.h>
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+
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+#define PASSWD_0 "Hello world!"
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+#define SALT_0 "\$6\$saltstring"
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+#define EXPECT_0 "\$6\$saltstring\$svn8UoSVapNtMuq1ukKS4tPQd8iKwSMHWjl/O817G3uBnIFNjnQJu" \
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+ "esI68u4OTLiBFdcbYEdFCoEOfaS35inz1"
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+]], [char *result = crypt(PASSWD_0, SALT_0);
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+ if (!result) return 1;
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+ if (strcmp(result, EXPECT_0)) return 2;
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+])], [ap_cv_crypt_sha2=yes], [ap_cv_crypt_sha2=no])])
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+ if test "$ap_cv_crypt_sha2" = yes; then
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+ AC_DEFINE([HAVE_CRYPT_SHA2], 1, [Define if crypt() supports SHA-2 hashes])
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+ fi
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+fi
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+
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LIBS="$saved_LIBS"
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dnl See Comment #Spoon
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--- httpd-2.4.43/docs/man/htpasswd.1.r1861793+
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+++ httpd-2.4.43/docs/man/htpasswd.1
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@@ -27,16 +27,16 @@
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.SH "SYNOPSIS"
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.PP
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-\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
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+\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
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.PP
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-\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
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+\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
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.PP
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-\fB\fBhtpasswd\fR -\fBn\fR [ -\fBi\fR ] [ -\fBm\fR | -\fBB\fR | -\fBd\fR | -\fBs\fR | -\fBp\fR ] [ -\fBC\fR \fIcost\fR ] \fIusername\fR\fR
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+\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
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.PP
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-\fB\fBhtpasswd\fR -\fBnb\fR [ -\fBm\fR | -\fBB\fR | -\fBd\fR | -\fBs\fR | -\fBp\fR ] [ -\fBC\fR \fIcost\fR ] \fIusername\fR \fIpassword\fR\fR
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+\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
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.SH "SUMMARY"
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@@ -48,7 +48,7 @@
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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\&.
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.PP
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-\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\&.
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+\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\&.
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.PP
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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/\&.
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@@ -73,17 +73,26 @@
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\fB-m\fR
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Use MD5 encryption for passwords\&. This is the default (since version 2\&.2\&.18)\&.
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.TP
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+\fB-2\fR
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+Use SHA-256 \fBcrypt()\fR based hashes for passwords\&. This is supported on most Unix platforms\&.
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+.TP
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+\fB-5\fR
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+Use SHA-512 \fBcrypt()\fR based hashes for passwords\&. This is supported on most Unix platforms\&.
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+.TP
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\fB-B\fR
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Use bcrypt encryption for passwords\&. This is currently considered to be very secure\&.
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.TP
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\fB-C\fR
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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)\&.
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.TP
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+\fB-r\fR
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+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)\&.
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+.TP
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\fB-d\fR
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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\&.
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.TP
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\fB-s\fR
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-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\&.
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+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\&.
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.TP
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\fB-p\fR
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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\&.
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@@ -152,10 +161,13 @@
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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\&.
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.PP
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-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\&.
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+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\&.
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+
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+.PP
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+The SHA-1 and \fBcrypt()\fR formats are insecure by today's standards\&.
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.PP
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-The SHA and \fBcrypt()\fR formats are insecure by today's standards\&.
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+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\&.
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.SH "RESTRICTIONS"
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--- httpd-2.4.43/support/htpasswd.c.r1861793+
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+++ httpd-2.4.43/support/htpasswd.c
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@@ -109,17 +109,21 @@
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"for it." NL
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" -i Read password from stdin without verification (for script usage)." NL
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" -m Force MD5 encryption of the password (default)." NL
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- " -B Force bcrypt encryption of the password (very secure)." NL
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+ " -2 Force SHA-256 crypt() hash of the password (very secure)." NL
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+ " -5 Force SHA-512 crypt() hash of the password (very secure)." NL
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+ " -B Force bcrypt encryption of the password (very secure)." NL
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" -C Set the computing time used for the bcrypt algorithm" NL
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" (higher is more secure but slower, default: %d, valid: 4 to 17)." NL
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+ " -r Set the number of rounds used for the SHA-256, SHA-512 algorithms" NL
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+ " (higher is more secure but slower, default: 5000)." NL
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" -d Force CRYPT encryption of the password (8 chars max, insecure)." NL
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- " -s Force SHA encryption of the password (insecure)." NL
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+ " -s Force SHA-1 encryption of the password (insecure)." NL
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" -p Do not encrypt the password (plaintext, insecure)." NL
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" -D Delete the specified user." NL
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" -v Verify password for the specified user." NL
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"On other systems than Windows and NetWare the '-p' flag will "
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"probably not work." NL
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- "The SHA algorithm does not use a salt and is less secure than the "
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+ "The SHA-1 algorithm does not use a salt and is less secure than the "
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"MD5 algorithm." NL,
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BCRYPT_DEFAULT_COST
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);
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@@ -178,7 +182,7 @@
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if (rv != APR_SUCCESS)
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exit(ERR_SYNTAX);
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- while ((rv = apr_getopt(state, "cnmspdBbDiC:v", &opt, &opt_arg)) == APR_SUCCESS) {
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+ while ((rv = apr_getopt(state, "cnmspdBbDi25C:r:v", &opt, &opt_arg)) == APR_SUCCESS) {
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switch (opt) {
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case 'c':
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*mask |= APHTP_NEWFILE;
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--- httpd-2.4.43/support/passwd_common.c.r1861793+
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+++ httpd-2.4.43/support/passwd_common.c
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@@ -179,16 +179,21 @@
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int mkhash(struct passwd_ctx *ctx)
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{
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char *pw;
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- char salt[16];
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+ char salt[17];
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apr_status_t rv;
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int ret = 0;
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#if CRYPT_ALGO_SUPPORTED
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char *cbuf;
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#endif
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+#ifdef HAVE_CRYPT_SHA2
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+ const char *setting;
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+ char method;
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+#endif
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- if (ctx->cost != 0 && ctx->alg != ALG_BCRYPT) {
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+ if (ctx->cost != 0 && ctx->alg != ALG_BCRYPT
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+ && ctx->alg != ALG_CRYPT_SHA256 && ctx->alg != ALG_CRYPT_SHA512 ) {
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apr_file_printf(errfile,
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- "Warning: Ignoring -C argument for this algorithm." NL);
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+ "Warning: Ignoring -C/-r argument for this algorithm." NL);
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}
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if (ctx->passwd == NULL) {
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@@ -246,6 +251,34 @@
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break;
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#endif /* CRYPT_ALGO_SUPPORTED */
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+#ifdef HAVE_CRYPT_SHA2
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+ case ALG_CRYPT_SHA256:
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+ case ALG_CRYPT_SHA512:
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+ ret = generate_salt(salt, 16, &ctx->errstr, ctx->pool);
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+ if (ret != 0)
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+ break;
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+
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+ method = ctx->alg == ALG_CRYPT_SHA256 ? '5': '6';
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+
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+ if (ctx->cost)
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+ setting = apr_psprintf(ctx->pool, "$%c$rounds=%d$%s",
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+ method, ctx->cost, salt);
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+ else
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+ setting = apr_psprintf(ctx->pool, "$%c$%s",
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+ method, salt);
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+
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+ cbuf = crypt(pw, setting);
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+ if (cbuf == NULL) {
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+ rv = APR_FROM_OS_ERROR(errno);
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+ ctx->errstr = apr_psprintf(ctx->pool, "crypt() failed: %pm", &rv);
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+ ret = ERR_PWMISMATCH;
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+ break;
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+ }
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+
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+ apr_cpystrn(ctx->out, cbuf, ctx->out_len - 1);
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+ break;
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+#endif /* HAVE_CRYPT_SHA2 */
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+
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#if BCRYPT_ALGO_SUPPORTED
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case ALG_BCRYPT:
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rv = apr_generate_random_bytes((unsigned char*)salt, 16);
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@@ -294,6 +327,19 @@
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case 's':
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ctx->alg = ALG_APSHA;
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break;
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+#ifdef HAVE_CRYPT_SHA2
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+ case '2':
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+ ctx->alg = ALG_CRYPT_SHA256;
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+ break;
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+ case '5':
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+ ctx->alg = ALG_CRYPT_SHA512;
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+ break;
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+#else
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+ case '2':
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+ case '5':
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+ ctx->errstr = "SHA-2 crypt() algorithms are not supported on this platform.";
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+ return ERR_ALG_NOT_SUPP;
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+#endif
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case 'p':
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ctx->alg = ALG_PLAIN;
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#if !PLAIN_ALGO_SUPPORTED
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@@ -324,11 +370,12 @@
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return ERR_ALG_NOT_SUPP;
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#endif
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break;
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- case 'C': {
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+ case 'C':
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+ case 'r': {
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char *endptr;
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long num = strtol(opt_arg, &endptr, 10);
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if (*endptr != '\0' || num <= 0) {
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- ctx->errstr = "argument to -C must be a positive integer";
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+ ctx->errstr = "argument to -C/-r must be a positive integer";
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return ERR_SYNTAX;
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}
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ctx->cost = num;
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--- httpd-2.4.43/support/passwd_common.h.r1861793+
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+++ httpd-2.4.43/support/passwd_common.h
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@@ -28,6 +28,8 @@
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#include "apu_version.h"
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#endif
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+#include "ap_config_auto.h"
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+
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#define MAX_STRING_LEN 256
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#define ALG_PLAIN 0
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@@ -35,6 +37,8 @@
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#define ALG_APMD5 2
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#define ALG_APSHA 3
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#define ALG_BCRYPT 4
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+#define ALG_CRYPT_SHA256 5
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+#define ALG_CRYPT_SHA512 6
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#define BCRYPT_DEFAULT_COST 5
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@@ -84,7 +88,7 @@
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apr_size_t out_len;
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char *passwd;
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int alg;
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- int cost;
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+ int cost; /* cost for bcrypt, rounds for SHA-2 */
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enum {
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PW_PROMPT = 0,
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PW_ARG,
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