Adding upstream version 2.4.56.upstream/2.4.56

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 344 insertions, 0 deletions

diff --git a/support/passwd_common.c b/support/passwd_common.c
new file mode 100644
index 0000000..664e509
--- /dev/null
+++ b/support/passwd_common.c
@@ -0,0 +1,344 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "passwd_common.h"
+#include "apr_strings.h"
+#include "apr_errno.h"
+
+#if APR_HAVE_STDIO_H
+#include <stdio.h>
+#endif
+
+#include "apr_md5.h"
+#include "apr_sha1.h"
+
+#if APR_HAVE_TIME_H
+#include <time.h>
+#endif
+#if APR_HAVE_CRYPT_H
+#include <crypt.h>
+#endif
+#if APR_HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#if APR_HAVE_STRING_H
+#include <string.h>
+#endif
+#if APR_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if APR_HAVE_IO_H
+#include <io.h>
+#endif
+
+#ifdef _MSC_VER
+#define write _write
+#endif
+
+apr_file_t *errfile;
+
+int abort_on_oom(int rc)
+{
+    const char *buf = "Error: out of memory\n";
+    int written, count = strlen(buf);
+    do {
+        written = write(STDERR_FILENO, buf, count);
+        if (written == count)
+            break;
+        if (written > 0) {
+            buf += written;
+            count -= written;
+        }
+    } while (written >= 0 || errno == EINTR);
+    abort();
+    /* NOTREACHED */
+    return 0;
+}
+
+static int generate_salt(char *s, size_t size, const char **errstr,
+                         apr_pool_t *pool)
+{
+    unsigned char rnd[32];
+    static const char itoa64[] =
+        "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+    apr_size_t n;
+    unsigned int val = 0, bits = 0;
+    apr_status_t rv;
+
+    n = (size * 6 + 7)/8;
+    if (n > sizeof(rnd)) {
+        apr_file_printf(errfile, "generate_salt(): BUG: Buffer too small");
+        abort();
+    }
+    rv = apr_generate_random_bytes(rnd, n);
+    if (rv) {
+        *errstr = apr_psprintf(pool, "Unable to generate random bytes: %pm",
+                               &rv);
+        return ERR_RANDOM;
+    }
+    n = 0;
+    while (size > 0) {
+        if (bits < 6) {
+            val |= (rnd[n++] << bits);
+            bits += 8;
+        }
+        *s++ = itoa64[val & 0x3f];
+        size--;
+        val >>= 6;
+        bits -= 6;
+    }
+    *s = '\0';
+    return 0;
+}
+
+void putline(apr_file_t *f, const char *l)
+{
+    apr_status_t rv;
+    if (f == NULL)
+        return;
+    rv = apr_file_puts(l, f);
+    if (rv != APR_SUCCESS) {
+        apr_file_printf(errfile, "Error writing temp file: %pm", &rv);
+        apr_file_close(f);
+        exit(ERR_FILEPERM);
+    }
+}
+
+int get_password(struct passwd_ctx *ctx)
+{
+    char buf[MAX_STRING_LEN + 1];
+    if (ctx->passwd_src == PW_STDIN) {
+        apr_file_t *file_stdin;
+        apr_size_t nread;
+        if (apr_file_open_stdin(&file_stdin, ctx->pool) != APR_SUCCESS) {
+            ctx->errstr = "Unable to read from stdin.";
+            return ERR_GENERAL;
+        }
+        if (apr_file_read_full(file_stdin, buf, sizeof(buf) - 1,
+                               &nread) != APR_EOF
+            || nread == sizeof(buf) - 1) {
+            goto err_too_long;
+        }
+        buf[nread] = '\0';
+        if (nread >= 1 && buf[nread-1] == '\n') {
+            buf[nread-1] = '\0';
+            if (nread >= 2 && buf[nread-2] == '\r')
+                buf[nread-2] = '\0';
+        }
+        apr_file_close(file_stdin);
+        ctx->passwd = apr_pstrdup(ctx->pool, buf);
+    }
+    else if (ctx->passwd_src == PW_PROMPT_VERIFY) {
+        apr_size_t bufsize = sizeof(buf);
+        if (apr_password_get("Enter password: ", buf, &bufsize) != 0)
+            goto err_too_long;
+        ctx->passwd = apr_pstrdup(ctx->pool, buf);
+    }
+    else {
+        apr_size_t bufsize = sizeof(buf);
+        if (apr_password_get("New password: ", buf, &bufsize) != 0)
+            goto err_too_long;
+        ctx->passwd = apr_pstrdup(ctx->pool, buf);
+        bufsize = sizeof(buf);
+        buf[0] = '\0';
+        apr_password_get("Re-type new password: ", buf, &bufsize);
+        if (strcmp(ctx->passwd, buf) != 0) {
+            ctx->errstr = "password verification error";
+            memset(ctx->passwd, '\0', strlen(ctx->passwd));
+            memset(buf, '\0', sizeof(buf));
+            return ERR_PWMISMATCH;
+        }
+    }
+    memset(buf, '\0', sizeof(buf));
+    return 0;
+
+err_too_long:
+    ctx->errstr = apr_psprintf(ctx->pool,
+                               "password too long (>%" APR_SIZE_T_FMT ")",
+                               sizeof(buf) - 1);
+    return ERR_OVERFLOW;
+}
+
+/*
+ * Make a password record from the given information.  A zero return
+ * indicates success; on failure, ctx->errstr points to the error message.
+ */
+int mkhash(struct passwd_ctx *ctx)
+{
+    char *pw;
+    char salt[16];
+    apr_status_t rv;
+    int ret = 0;
+#if CRYPT_ALGO_SUPPORTED
+    char *cbuf;
+#endif
+
+    if (ctx->cost != 0 && ctx->alg != ALG_BCRYPT) {
+        apr_file_printf(errfile,
+                        "Warning: Ignoring -C argument for this algorithm." NL);
+    }
+
+    if (ctx->passwd == NULL) {
+        if ((ret = get_password(ctx)) != 0)
+            return ret;
+    }
+    pw = ctx->passwd;
+
+    switch (ctx->alg) {
+    case ALG_APSHA:
+        /* XXX out >= 28 + strlen(sha1) chars - fixed len SHA */
+        apr_sha1_base64(pw, strlen(pw), ctx->out);
+        break;
+
+    case ALG_APMD5:
+        ret = generate_salt(salt, 8, &ctx->errstr, ctx->pool);
+        if (ret != 0)
+            break;
+        rv = apr_md5_encode(pw, salt, ctx->out, ctx->out_len);
+        if (rv != APR_SUCCESS) {
+            ctx->errstr = apr_psprintf(ctx->pool,
+                                       "could not encode password: %pm", &rv);
+            ret = ERR_GENERAL;
+        }
+        break;
+
+    case ALG_PLAIN:
+        /* XXX this len limitation is not in sync with any HTTPd len. */
+        apr_cpystrn(ctx->out, pw, ctx->out_len);
+        break;
+
+#if CRYPT_ALGO_SUPPORTED
+    case ALG_CRYPT:
+        ret = generate_salt(salt, 8, &ctx->errstr, ctx->pool);
+        if (ret != 0)
+            break;
+        cbuf = crypt(pw, salt);
+        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);
+        if (strlen(pw) > 8) {
+            char *truncpw = apr_pstrdup(ctx->pool, pw);
+            truncpw[8] = '\0';
+            if (!strcmp(ctx->out, crypt(truncpw, salt))) {
+                apr_file_printf(errfile, "Warning: Password truncated to 8 "
+                                "characters by CRYPT algorithm." NL);
+            }
+            memset(truncpw, '\0', strlen(pw));
+        }
+        break;
+#endif /* CRYPT_ALGO_SUPPORTED */
+
+#if BCRYPT_ALGO_SUPPORTED
+    case ALG_BCRYPT:
+        rv = apr_generate_random_bytes((unsigned char*)salt, 16);
+        if (rv != APR_SUCCESS) {
+            ctx->errstr = apr_psprintf(ctx->pool, "Unable to generate random "
+                                       "bytes: %pm", &rv);
+            ret = ERR_RANDOM;
+            break;
+        }
+
+        if (ctx->cost == 0)
+            ctx->cost = BCRYPT_DEFAULT_COST;
+        rv = apr_bcrypt_encode(pw, ctx->cost, (unsigned char*)salt, 16,
+                               ctx->out, ctx->out_len);
+        if (rv != APR_SUCCESS) {
+            ctx->errstr = apr_psprintf(ctx->pool, "Unable to encode with "
+                                       "bcrypt: %pm", &rv);
+            ret = ERR_PWMISMATCH;
+            break;
+        }
+        break;
+#endif /* BCRYPT_ALGO_SUPPORTED */
+
+    default:
+        apr_file_printf(errfile, "mkhash(): BUG: invalid algorithm %d",
+                        ctx->alg);
+        abort();
+    }
+    memset(pw, '\0', strlen(pw));
+    return ret;
+}
+
+int parse_common_options(struct passwd_ctx *ctx, char opt,
+                          const char *opt_arg)
+{
+    switch (opt) {
+    case 'b':
+        ctx->passwd_src = PW_ARG;
+        break;
+    case 'i':
+        ctx->passwd_src = PW_STDIN;
+        break;
+    case 'm':
+        ctx->alg = ALG_APMD5;
+        break;
+    case 's':
+        ctx->alg = ALG_APSHA;
+        break;
+    case 'p':
+        ctx->alg = ALG_PLAIN;
+#if !PLAIN_ALGO_SUPPORTED
+        /* Backward compatible behavior: Just print a warning */
+        apr_file_printf(errfile,
+                        "Warning: storing passwords as plain text might just "
+                        "not work on this platform." NL);
+#endif
+        break;
+    case 'd':
+#if CRYPT_ALGO_SUPPORTED
+        ctx->alg = ALG_CRYPT;
+#else
+        /* Backward compatible behavior: Use MD5. OK since MD5 is more secure */
+        apr_file_printf(errfile,
+                        "Warning: CRYPT algorithm not supported on this "
+                        "platform." NL
+                        "Automatically using MD5 format." NL);
+        ctx->alg = ALG_APMD5;
+#endif
+        break;
+    case 'B':
+#if BCRYPT_ALGO_SUPPORTED
+        ctx->alg = ALG_BCRYPT;
+#else
+        /* Don't fall back to something less secure */
+        ctx->errstr = "BCRYPT algorithm not supported on this platform";
+        return ERR_ALG_NOT_SUPP;
+#endif
+        break;
+    case 'C': {
+            char *endptr;
+            long num = strtol(opt_arg, &endptr, 10);
+            if (*endptr != '\0' || num <= 0) {
+                ctx->errstr = "argument to -C must be a positive integer";
+                return ERR_SYNTAX;
+            }
+            ctx->cost = num;
+            break;
+        }
+    default:
+        apr_file_printf(errfile, 
+                        "parse_common_options(): BUG: invalid option %c",
+                        opt);
+        abort();
+    }
+    return 0;
+}