diff --git a/configure.in b/configure.in
index de6a8ad..4ca489d 100644
--- a/configure.in
+++ b/configure.in
@@ -465,6 +465,28 @@ LIBS=""
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
diff --git a/support/htpasswd.c b/support/htpasswd.c
index 660a27c..136f62a 100644
--- a/support/htpasswd.c
+++ b/support/htpasswd.c
@@ -98,28 +98,32 @@ static int mkrecord(struct passwd_ctx *ctx, char *user)
static void usage(void)
{
apr_file_printf(errfile, "Usage:" NL
- "\thtpasswd [-cimBdpsDv] [-C cost] passwordfile username" NL
- "\thtpasswd -b[cmBdpsDv] [-C cost] passwordfile username password" NL
+ "\thtpasswd [-cimB25dpsDv] [-C cost] [-r rounds] passwordfile username" NL
+ "\thtpasswd -b[cmB25dpsDv] [-C cost] [-r rounds] passwordfile username password" NL
NL
- "\thtpasswd -n[imBdps] [-C cost] username" NL
- "\thtpasswd -nb[mBdps] [-C cost] username password" NL
+ "\thtpasswd -n[imB25dps] [-C cost] [-r rounds] username" NL
+ "\thtpasswd -nb[mB25dps] [-C cost] [-r rounds] username password" NL
" -c Create a new file." NL
" -n Don't update file; display results on stdout." NL
" -b Use the password from the command line rather than prompting "
"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 (secure)." NL
+ " -5 Force SHA-512 crypt() hash of the password (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 31)." 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 @@ static void check_args(int argc, const char *const argv[],
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;
diff --git a/support/passwd_common.c b/support/passwd_common.c
index 664e509..d45657c 100644
--- a/support/passwd_common.c
+++ b/support/passwd_common.c
@@ -185,10 +185,15 @@ int mkhash(struct passwd_ctx *ctx)
#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 @@ int mkhash(struct passwd_ctx *ctx)
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 @@ int parse_common_options(struct passwd_ctx *ctx, char opt,
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 @@ int parse_common_options(struct passwd_ctx *ctx, char opt,
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;
diff --git a/support/passwd_common.h b/support/passwd_common.h
index 660081e..f1b3cd7 100644
--- a/support/passwd_common.h
+++ b/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 @@ struct passwd_ctx {
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,