Upstream-Status: proposed for 2.4.59 --- 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 +#include +#include + +#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,