#2826

Committed 13 May 2025 12:42PM UTC coverage: 73.293% (+0.09%) from 73.203%

Build # #2826

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push

travis-ci

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web-flow

Commit Message

Merge 79ab56b79 into f55e820e5

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85.35

/src/utils/swtpm_utils.c

/* SPDX-License-Identifier: BSD-3-Clause */
/*
 * swtpm_setup_utils.c: Utility functions for swtpm_setup et al.
 *
 * Author: Stefan Berger, stefanb@linux.ibm.com
 *
 * Copyright (c) IBM Corporation, 2021
 */

#include "config.h"

#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <glib.h>
#include <json-glib/json-glib.h>

#include "swtpm_utils.h"

void append_to_file(const char *pathname, const char *str)
{
    size_t n, len;
    int fd = open(pathname, O_WRONLY|O_APPEND|O_CREAT|O_NOFOLLOW, S_IRUSR|S_IWUSR|S_IRGRP);

    if (fd >= 0) {
        len = strlen(str);
        n = write(fd, str, len);
        if (n != len) {
            fprintf(stderr, "Error writing to %s: %s\n", pathname, strerror(errno));
        }
        close(fd);
    } else {
        fprintf(stderr, "Error opening file %s: %s\n", pathname, strerror(errno));
    }
}

static void alog(FILE *stream, const char *logfile, const char *fmt, va_list ap)
{
    char *str = NULL;
    int n;

    n = vasprintf(&str, fmt, ap);
    if (n < 0)
        return;

    if (logfile == NULL)
        fprintf(stream, "%s", str);
    else
        append_to_file(logfile, str);

    free(str);
}

void logit(const char *logfile, const char *fmt, ...)
{
    va_list ap;

    va_start(ap, fmt);
    alog(stdout, logfile, fmt, ap);
    va_end(ap);
}

void logerr(const char *logfile, const char *fmt, ...)
{
    va_list ap;

    va_start(ap, fmt);
    alog(stderr, logfile, fmt, ap);
    va_end(ap);
}

/* Join paths of up to 3 parts into a pre-allocated buffer. The last part is optional */
char *pathjoin(char *buffer, size_t bufferlen, const char *p1, const char *p2, const char *p3)
{
    char *res = NULL;
    int n = snprintf(buffer, bufferlen, "%s%s%s%s%s",
                     p1,
                     G_DIR_SEPARATOR_S,
                     p2,
                     p3 ? G_DIR_SEPARATOR_S : "",
                     p3 ? p3 : "");
    if (n < 0) {
        logerr(gl_LOGFILE, "Error: Could not print into buffer.\n");
    } else if ((size_t)n >= bufferlen) {
        logerr(gl_LOGFILE, "Error: Buffer for path is too small.\n");
    } else {
        res = buffer;
    }
    return res;
}

/* Concatenate two NULL-terminated arrays creating one new one;
 * This function does not duplicate the memory for the elements.
 * Either one of the arrays may be NULL. The first array can be freed.
 */
const gchar **concat_arrays(const gchar **arr1, const gchar **arr2, gboolean free_arr1)
{
    size_t n = 0;
    const gchar **res;
    size_t i;

    for (i = 0; arr1 != NULL && arr1[i]; i++)
        n++;
    for (i = 0; arr2 != NULL && arr2[i]; i++)
        n++;

    res = g_malloc0(sizeof(char *) * (n + 1));
    for (i = 0, n = 0; arr1 != NULL && arr1[i]; i++)
        res[n++] = arr1[i];
    for (i = 0; arr2 != NULL && arr2[i]; i++)
        res[n++] = arr2[i];

    if (free_arr1 && arr1)
        g_free(arr1);

    return res;
}

gchar **concat_varrays(gchar **arr1, gchar **arr2, gboolean free_arr1)
{
    return (gchar **)concat_arrays((const char **)arr1,
                                   (const char **)arr2,
                                   free_arr1);
}

/* Concatenate buffers into a given buffer of a given length 'buflen' */
ssize_t concat(unsigned char *buffer, size_t buflen, ...)
{
    va_list ap;
    ssize_t offset = 0;

    va_start(ap, buflen);

    while (1) {
        size_t len;
        unsigned char *i = va_arg(ap, unsigned char *);

        if (i == NULL)
            break;

        len = va_arg(ap, size_t);
        if (offset + len > buflen) {
            offset = -(offset + len);
            break;
        }

        memcpy(&buffer[offset], i, len);
        offset += len;
   }
   va_end(ap);

   return offset;
}

/* Concatenate buffers and allocate a new buffer and return its size */
ssize_t memconcat(unsigned char **buffer, ...)
{
    va_list ap;
    ssize_t offset = 0;
    size_t allocated = 128;
    unsigned char *p;

    *buffer = g_malloc(allocated);
    p = *buffer;

    va_start(ap, buffer);

    while (1) {
        size_t len;
        unsigned char *i = va_arg(ap, unsigned char *);

        if (i == NULL)
            break;

        len = va_arg(ap, size_t);
        if (offset + len > allocated) {
            allocated += offset + len;
            *buffer = g_realloc(*buffer, allocated);
            p = *buffer;
        }

        memcpy(&p[offset], i, len);
        offset += len;
   }
   va_end(ap);

   return offset;
}

/* Print an input buffer as hex number */
gchar *print_as_hex(const unsigned char *input, size_t input_len)
{
    gchar *out = g_malloc(input_len * 2 + 1);
    size_t i;

    for (i = 0; i < input_len; i++)
        g_snprintf(&out[i * 2], 3, "%02x", input[i]);

    return out;
}

/* Split a command line and remove all trailing and leading spaces from all entries and remove
 * 0-length strings entirely.
 */
gchar **split_cmdline(const gchar *cmdline) {
    gchar **result = g_strsplit(cmdline, " ", -1);
    size_t i, j;

    for (i = 0, j = 0; result[i] != NULL; i++) {
        gchar *chomped = g_strchomp(result[i]);

        if (strlen(chomped) == 0) {
            g_free(chomped);
            result[i] = NULL;
        } else {
            result[i] = NULL;
            result[j++] = chomped;
        }
    }
    return result;
}

/* resolve environment variables in a string */
gchar *resolve_string(const gchar *inp) {
    char *pe;
    gchar *result = NULL;
    gchar *new_res, *tmp;
    size_t sidx = 0;
    const gchar *envval;

    while (1) {
        gchar *ps = g_strstr_len(&inp[sidx], -1, "${");
        if (ps == NULL) {
            if (sidx == 0) {
                g_free(result); /* coverity */
                return g_strdup(inp);
            }
            new_res = g_strconcat(result ? result : "", &inp[sidx], NULL);
            g_free(result);
            return new_res;
        }

        tmp = g_strndup(&inp[sidx], ps - &inp[sidx]);
        new_res = g_strconcat(result ? result : "", tmp, NULL);
        g_free(tmp);
        g_free(result);
        result = new_res;

        pe = g_strstr_len(&ps[2], -1, "}");
        if (pe == NULL) {
            new_res = g_strconcat(result ? result : "", ps, NULL);
            g_free(result);
            return new_res;
        }

        /* name of environment variable */
        tmp = g_strndup(&ps[2], pe - &ps[2]);

        envval = g_getenv(tmp);
        new_res = g_strconcat(result ? result : "",
                              envval ? envval : "",
                              NULL);
        g_free(tmp);
        g_free(result);
        result = new_res;
        sidx = &pe[1] - inp;
    }
}

/* Read an entire file */
int read_file(const gchar *filename, gchar **buffer, gsize *buffer_len)
{
    GError *error = NULL;

    if (!g_file_get_contents(filename, buffer, buffer_len, &error)) {
        logerr(gl_LOGFILE, "%s\n", error->message);
        g_error_free(error);
        return 1;
    }
    return 0;
}

/* Read a file and convert its lines into a NULL-termianted array */
int read_file_lines(const char *filename, gchar ***config_file_lines)
{
    g_autofree gchar *buffer = NULL;
    gsize buffer_len;
    size_t start = 0;
    gchar **array;
    gsize array_len = 1; /* null-terminated array */

    if (read_file(filename, &buffer, &buffer_len) != 0)
        return 1;

    array = g_malloc0(sizeof(char *) * array_len);

    while (start < buffer_len) {
        size_t off = start;

        /* search for end-of-string or next newline */
        while (off < buffer_len && buffer[off] != '\n')
            off++;

        if (off > start) {
            /* non-empty line */
            array = g_realloc(array, sizeof(char *) * (array_len + 1));
            array[array_len - 1] = g_strndup(&buffer[start], off - start);
            array_len++;
        }
        start = off + 1;
    }
    array[array_len - 1] = NULL;
    *config_file_lines = array;

    return 0;
}

static ssize_t write_to_fd(int fd, const unsigned char *data, size_t data_len)
{
    ssize_t n;

    n = write(fd, data, data_len);
    if (n < 0) {
        logerr(gl_LOGFILE, "Could not write to file: %s\n", strerror(errno));
    } else if ((size_t)n != data_len) {
        logerr(gl_LOGFILE, "Could not write all bytes to the file.\n");
        n = -1;
    }
    return n;
}

/* Write to a file with the given name */
int write_file(const gchar *filename, const unsigned char *data, size_t data_len)
{
    ssize_t n;
    int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC,
                  S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH );
    if (fd < 0) {
        logerr(gl_LOGFILE, "Could not open file %s for writing: %s\n",
               filename, strerror(errno));
        return 1;
    }

    n = write_to_fd(fd, data, data_len);
    close(fd);
    if (n < 0)
        return 1;

    return 0;
}

int write_to_tempfile(gchar **filename, const unsigned char *data, size_t data_len)
{
    GError *error = NULL;
    int fd = g_file_open_tmp("XXXXXX", filename, &error);
    ssize_t n;

    if (error) {
        logerr(gl_LOGFILE, "Could not create temporary file: %s\n", error->message);
        g_error_free(error);
        return 1;
    }

    n = write_to_fd(fd, data, data_len);
    if (n < 0)
        goto error;

    n = lseek(fd, 0, SEEK_SET);
    if (n < 0) {
        logerr(gl_LOGFILE, "Could not seek(0) on file '%s': %s\n", filename, strerror(errno));
        goto error;
    }
    return fd;

error:
    close(fd);
    return -1;
}

/* replace occurrences of 'torep' with 'rep' in a string 'in' */
gchar *str_replace(const char *in, const char *torep, const char *rep)
{
    char *res;
    const char *s, *b;
    size_t torep_len;
    size_t rep_len;
    size_t ctr = 0;
    size_t off = 0;

    if (in == NULL || torep == NULL || rep == NULL)
        return NULL;

    torep_len = strlen(torep);
    if (torep_len == 0)
        return NULL;

    rep_len = strlen(rep);

    s = in;
    while ((s = strstr(s, torep)) != NULL) {
        s += torep_len;
        ctr++;
    }

    res = g_malloc(strlen(in) - ctr * torep_len + ctr * rep_len + 1);

    b = s = in;
    while ((s = strstr(s, torep)) != NULL) {
        strncpy(&res[off], b, s - b);
        off += (s - b);
        s += torep_len;
        b = s;
        strcpy(&res[off], rep);
        off += rep_len;
    }
    strcpy(&res[off], b);

    return res;
}

int check_directory_access(const gchar *directory, int mode, const struct passwd *curr_user)
{
    struct stat statbuf;

    if (stat(directory, &statbuf) != 0 || (statbuf.st_mode & S_IFMT) != S_IFDIR) {
        logerr(gl_LOGFILE,
               "User %s cannot access directory %s. Make sure it exists and is a directory.\n",
               curr_user ? curr_user->pw_name : "<unknown>", directory);
        return 1;
    }
    if ((mode & R_OK) && access(directory, R_OK) != 0) {
        logerr(gl_LOGFILE, "Need read rights on directory %s for user %s.\n",
               directory, curr_user ? curr_user->pw_name : "<unknown>");
        return 1;
    }
    if ((mode & W_OK) && access(directory, W_OK) != 0) {
        logerr(gl_LOGFILE, "Need write rights on directory %s for user %s.\n",
               directory, curr_user ? curr_user->pw_name : "<unknown>");
        return 1;
    }
    return 0;
}

int json_get_map_value(const char *json_input, const char *field_name,
                       gchar **value)
{
    g_autoptr(GError) error = NULL;
    JsonParser *jp = NULL;
    JsonReader *jr = NULL;
    JsonNode *root;
    int ret = -1;

    jp = json_parser_new();
    if (!json_parser_load_from_data(jp, json_input, -1, &error)) {
        logerr(gl_LOGFILE,
               "Could not parse JSON '%s': %s\n", json_input, error->message);
        goto error_unref_jp;
    }

    root = json_parser_get_root(jp);
    jr = json_reader_new(root);

    if (!json_reader_read_member(jr, field_name)) {
        logerr(gl_LOGFILE, "Missing '%s' field in '%s'\n",
               field_name, json_input);
        goto error_unref_jr;
    }
    *value = g_strdup(json_reader_get_string_value(jr));
    /* caller should handle *value == NULL */

    ret = 0;

error_unref_jr:
    g_object_unref(jr);

error_unref_jp:
    g_object_unref(jp);

    return ret;
}

int strv_strcmp(gchar *const*str_array, const gchar *s)
{
    size_t i;

    for (i = 0; str_array[i]; i++) {
        if (strcmp(str_array[i], s) == 0)
            return (int)i;
    }
    return -1;
}

1	/* SPDX-License-Identifier: BSD-3-Clause */
2	/*
3	* swtpm_setup_utils.c: Utility functions for swtpm_setup et al.
4	*
5	* Author: Stefan Berger, stefanb@linux.ibm.com
6	*
7	* Copyright (c) IBM Corporation, 2021
8	*/
9
10	#include "config.h"
11
12	#define _GNU_SOURCE
13	#include <sys/types.h>
14	#include <sys/stat.h>
15	#include <errno.h>
16	#include <fcntl.h>
17	#include <stdarg.h>
18	#include <stdio.h>
19	#include <stdlib.h>
20	#include <string.h>
21	#include <unistd.h>
22
23	#include <glib.h>
24	#include <json-glib/json-glib.h>
25
26	#include "swtpm_utils.h"
27
28	void append_to_file(const char pathname, const char str)	547✔
29	{
30	size_t n, len;	547✔
31	int fd = open(pathname, O_WRONLY\|O_APPEND\|O_CREAT\|O_NOFOLLOW, S_IRUSR\|S_IWUSR\|S_IRGRP);	547✔
32
33	if (fd >= 0) {	547✔
34	len = strlen(str);	547✔
35	n = write(fd, str, len);	547✔
36	if (n != len) {	547✔
37	fprintf(stderr, "Error writing to %s: %s\n", pathname, strerror(errno));	×
38	}
39	close(fd);	547✔
40	} else {
41	fprintf(stderr, "Error opening file %s: %s\n", pathname, strerror(errno));	×
42	}
43	}	547✔
44
45	static void alog(FILE stream, const char logfile, const char *fmt, va_list ap)	1,216✔
46	{
47	char *str = NULL;	1,216✔
48	int n;	1,216✔
49
50	n = vasprintf(&str, fmt, ap);	1,216✔
51	if (n < 0)	1,216✔
52	return;	×
53
54	if (logfile == NULL)	1,216✔
55	fprintf(stream, "%s", str);	669✔
56	else
57	append_to_file(logfile, str);	547✔
58
59	free(str);	1,216✔
60	}
61
62	void logit(const char logfile, const char fmt, ...)	1,171✔
63	{
64	va_list ap;	1,171✔
65
66	va_start(ap, fmt);	1,171✔
67	alog(stdout, logfile, fmt, ap);	1,171✔
68	va_end(ap);	1,171✔
69	}	1,171✔
70
71	void logerr(const char logfile, const char fmt, ...)	45✔
72	{
73	va_list ap;	45✔
74
75	va_start(ap, fmt);	45✔
76	alog(stderr, logfile, fmt, ap);	45✔
77	va_end(ap);	45✔
78	}	45✔
79
80	/* Join paths of up to 3 parts into a pre-allocated buffer. The last part is optional */
81	char pathjoin(char buffer, size_t bufferlen, const char p1, const char p2, const char *p3)	145✔
82	{
83	char *res = NULL;	145✔
84	int n = snprintf(buffer, bufferlen, "%s%s%s%s%s",	290✔
85	p1,
86	G_DIR_SEPARATOR_S,
87	p2,
88	p3 ? G_DIR_SEPARATOR_S : "",
89	p3 ? p3 : "");
90	if (n < 0) {	145✔
91	logerr(gl_LOGFILE, "Error: Could not print into buffer.\n");	×
92	} else if ((size_t)n >= bufferlen) {	145✔
93	logerr(gl_LOGFILE, "Error: Buffer for path is too small.\n");	×
94	} else {
95	res = buffer;
96	}
97	return res;	145✔
98	}
99
100	/* Concatenate two NULL-terminated arrays creating one new one;
101	* This function does not duplicate the memory for the elements.
102	* Either one of the arrays may be NULL. The first array can be freed.
103	*/
104	const gchar concat_arrays(const gchar arr1, const gchar **arr2, gboolean free_arr1)	3,620✔
105	{
106	size_t n = 0;	3,620✔
107	const gchar **res;	3,620✔
108	size_t i;	3,620✔
109
110	for (i = 0; arr1 != NULL && arr1[i]; i++)	25,865✔
111	n++;	22,245✔
112	for (i = 0; arr2 != NULL && arr2[i]; i++)	12,067✔
113	n++;	8,447✔
114
115	res = g_malloc0(sizeof(char ) (n + 1));	3,620✔
116	for (i = 0, n = 0; arr1 != NULL && arr1[i]; i++)	29,485✔
117	res[n++] = arr1[i];	22,245✔
118	for (i = 0; arr2 != NULL && arr2[i]; i++)	12,067✔
119	res[n++] = arr2[i];	8,447✔
120
121	if (free_arr1 && arr1)	3,620✔
122	g_free(arr1);	2,488✔
123
124	return res;	3,620✔
125	}
126
127	gchar concat_varrays(gchar arr1, gchar **arr2, gboolean free_arr1)	1,008✔
128	{
129	return (gchar )concat_arrays((const char )arr1,	1,008✔
130	(const char **)arr2,
131	free_arr1);
132	}
133
134	/* Concatenate buffers into a given buffer of a given length 'buflen' */
135	ssize_t concat(unsigned char *buffer, size_t buflen, ...)	402✔
136	{
137	va_list ap;	402✔
138	ssize_t offset = 0;	402✔
139
140	va_start(ap, buflen);	402✔
141
142	while (1) {	1,350✔
143	size_t len;	876✔
144	unsigned char i = va_arg(ap, unsigned char );	876✔
145
146	if (i == NULL)	876✔
147	break;
148
149	len = va_arg(ap, size_t);	474✔
150	if (offset + len > buflen) {	474✔
151	offset = -(offset + len);	×
152	break;	×
153	}
154
155	memcpy(&buffer[offset], i, len);	474✔
156	offset += len;	474✔
157	}
158	va_end(ap);	402✔
159
160	return offset;	402✔
161	}
162
163	/* Concatenate buffers and allocate a new buffer and return its size */
164	ssize_t memconcat(unsigned char **buffer, ...)	960✔
165	{
166	va_list ap;	960✔
167	ssize_t offset = 0;	960✔
168	size_t allocated = 128;	960✔
169	unsigned char *p;	960✔
170
171	*buffer = g_malloc(allocated);	960✔
172	p = *buffer;	960✔
173
174	va_start(ap, buffer);	960✔
175
176	while (1) {	8,622✔
177	size_t len;	4,791✔
178	unsigned char i = va_arg(ap, unsigned char );	4,791✔
179
180	if (i == NULL)	4,791✔
181	break;
182
183	len = va_arg(ap, size_t);	3,831✔
184	if (offset + len > allocated) {	3,831✔
185	allocated += offset + len;	88✔
186	buffer = g_realloc(buffer, allocated);	88✔
187	p = *buffer;	88✔
188	}
189
190	memcpy(&p[offset], i, len);	3,831✔
191	offset += len;	3,831✔
192	}
193	va_end(ap);	960✔
194
195	return offset;	960✔
196	}
197
198	/* Print an input buffer as hex number */
199	gchar print_as_hex(const unsigned char input, size_t input_len)	125✔
200	{
201	gchar out = g_malloc(input_len 2 + 1);	125✔
202	size_t i;	125✔
203
204	for (i = 0; i < input_len; i++)	17,562✔
205	g_snprintf(&out[i * 2], 3, "%02x", input[i]);	17,312✔
206
207	return out;	125✔
208	}
209
210	/* Split a command line and remove all trailing and leading spaces from all entries and remove
211	* 0-length strings entirely.
212	*/
213	gchar *split_cmdline(const gchar cmdline) {	157✔
214	gchar **result = g_strsplit(cmdline, " ", -1);	157✔
215	size_t i, j;	157✔
216
217	for (i = 0, j = 0; result[i] != NULL; i++) {	780✔
218	gchar *chomped = g_strchomp(result[i]);	466✔
219
220	if (strlen(chomped) == 0) {	466✔
221	g_free(chomped);	152✔
222	result[i] = NULL;	152✔
223	} else {
224	result[i] = NULL;	314✔
225	result[j++] = chomped;	314✔
226	}
227	}
228	return result;	157✔
229	}
230
231	/* resolve environment variables in a string */
232	gchar resolve_string(const gchar inp) {	296✔
233	char *pe;	296✔
234	gchar *result = NULL;	296✔
235	gchar new_res, tmp;	296✔
236	size_t sidx = 0;	296✔
237	const gchar *envval;	310✔
238
239	while (1) {	324✔
240	gchar *ps = g_strstr_len(&inp[sidx], -1, "${");	310✔
241	if (ps == NULL) {	310✔
242	if (sidx == 0) {	296✔
243	g_free(result); /* coverity */	282✔
244	return g_strdup(inp);	282✔
245	}
246	new_res = g_strconcat(result ? result : "", &inp[sidx], NULL);	14✔
247	g_free(result);	14✔
248	return new_res;	14✔
249	}
250
251	tmp = g_strndup(&inp[sidx], ps - &inp[sidx]);	14✔
252	new_res = g_strconcat(result ? result : "", tmp, NULL);	28✔
253	g_free(tmp);	14✔
254	g_free(result);	14✔
255	result = new_res;	14✔
256
257	pe = g_strstr_len(&ps[2], -1, "}");	14✔
258	if (pe == NULL) {	14✔
259	new_res = g_strconcat(result ? result : "", ps, NULL);	×
260	g_free(result);	×
261	return new_res;	×
262	}
263
264	/* name of environment variable */
265	tmp = g_strndup(&ps[2], pe - &ps[2]);	14✔
266
267	envval = g_getenv(tmp);	14✔
268	new_res = g_strconcat(result ? result : "",	14✔
269	envval ? envval : "",
270	NULL);
271	g_free(tmp);	14✔
272	g_free(result);	14✔
273	result = new_res;	14✔
274	sidx = &pe[1] - inp;	14✔
275	}
276	}
277
278	/* Read an entire file */
279	int read_file(const gchar filename, gchar buffer, gsize buffer_len)	421✔
280	{
281	GError *error = NULL;	421✔
282
283	if (!g_file_get_contents(filename, buffer, buffer_len, &error)) {	421✔
284	logerr(gl_LOGFILE, "%s\n", error->message);	×
285	g_error_free(error);	×
286	return 1;	×
287	}
288	return 0;
289	}
290
291	/* Read a file and convert its lines into a NULL-termianted array */
292	int read_file_lines(const char filename, gchar **config_file_lines)	278✔
293	{
294	g_autofree gchar *buffer = NULL;	556✔
295	gsize buffer_len;	278✔
296	size_t start = 0;	278✔
297	gchar **array;	278✔
298	gsize array_len = 1; /* null-terminated array */	278✔
299
300	if (read_file(filename, &buffer, &buffer_len) != 0)	278✔
301	return 1;
302
303	array = g_malloc0(sizeof(char ) array_len);	278✔
304
305	while (start < buffer_len) {	1,355✔
306	size_t off = start;
307
308	/* search for end-of-string or next newline */
309	while (off < buffer_len && buffer[off] != '\n')	46,667✔
310	off++;	45,590✔
311
312	if (off > start) {	1,077✔
313	/* non-empty line */
314	array = g_realloc(array, sizeof(char ) (array_len + 1));	1,077✔
315	array[array_len - 1] = g_strndup(&buffer[start], off - start);	1,077✔
316	array_len++;	1,077✔
317	}
318	start = off + 1;	1,077✔
319	}
320	array[array_len - 1] = NULL;	278✔
321	*config_file_lines = array;	278✔
322
323	return 0;	278✔
324	}
325
326	static ssize_t write_to_fd(int fd, const unsigned char *data, size_t data_len)	63✔
327	{
328	ssize_t n;	63✔
329
330	n = write(fd, data, data_len);	63✔
331	if (n < 0) {	63✔
332	logerr(gl_LOGFILE, "Could not write to file: %s\n", strerror(errno));	×
333	} else if ((size_t)n != data_len) {	63✔
334	logerr(gl_LOGFILE, "Could not write all bytes to the file.\n");	×
335	n = -1;	×
336	}
337	return n;	63✔
338	}
339
340	/* Write to a file with the given name */
341	int write_file(const gchar filename, const unsigned char data, size_t data_len)	33✔
342	{
343	ssize_t n;	33✔
344	int fd = open(filename, O_WRONLY \| O_CREAT \| O_TRUNC,	33✔
345	S_IRUSR \| S_IWUSR \| S_IRGRP \| S_IWGRP \| S_IROTH );
346	if (fd < 0) {	33✔
347	logerr(gl_LOGFILE, "Could not open file %s for writing: %s\n",	×
348	filename, strerror(errno));	×
349	return 1;	×
350	}
351
352	n = write_to_fd(fd, data, data_len);	33✔
353	close(fd);	33✔
354	if (n < 0)	33✔
355	return 1;	×
356
357	return 0;
358	}
359
360	int write_to_tempfile(gchar *filename, const unsigned char data, size_t data_len)	30✔
361	{
362	GError *error = NULL;	30✔
363	int fd = g_file_open_tmp("XXXXXX", filename, &error);	30✔
364	ssize_t n;	30✔
365
366	if (error) {	30✔
367	logerr(gl_LOGFILE, "Could not create temporary file: %s\n", error->message);	×
368	g_error_free(error);	×
369	return 1;	×
370	}
371
372	n = write_to_fd(fd, data, data_len);	30✔
373	if (n < 0)	30✔
374	goto error;	×
375
376	n = lseek(fd, 0, SEEK_SET);	30✔
377	if (n < 0) {	30✔
378	logerr(gl_LOGFILE, "Could not seek(0) on file '%s': %s\n", filename, strerror(errno));	×
379	goto error;	×
380	}
381	return fd;
382
383	error:	×
384	close(fd);	×
385	return -1;	×
386	}
387
388	/* replace occurrences of 'torep' with 'rep' in a string 'in' */
389	gchar str_replace(const char in, const char torep, const char rep)	4✔
390	{
391	char *res;	4✔
392	const char s, b;	4✔
393	size_t torep_len;	4✔
394	size_t rep_len;	4✔
395	size_t ctr = 0;	4✔
396	size_t off = 0;	4✔
397
398	if (in == NULL \|\| torep == NULL \|\| rep == NULL)	4✔
399	return NULL;
400
401	torep_len = strlen(torep);	4✔
402	if (torep_len == 0)	4✔
403	return NULL;
404
405	rep_len = strlen(rep);	4✔
406
407	s = in;	4✔
408	while ((s = strstr(s, torep)) != NULL) {	28✔
409	s += torep_len;	24✔
410	ctr++;	24✔
411	}
412
413	res = g_malloc(strlen(in) - ctr * torep_len + ctr * rep_len + 1);	4✔
414
415	b = s = in;	4✔
416	while ((s = strstr(s, torep)) != NULL) {	28✔
417	strncpy(&res[off], b, s - b);	24✔
418	off += (s - b);	24✔
419	s += torep_len;	24✔
420	b = s;	24✔
421	strcpy(&res[off], rep);	24✔
422	off += rep_len;	24✔
423	}
424	strcpy(&res[off], b);	4✔
425
426	return res;	4✔
427	}
428
429	int check_directory_access(const gchar directory, int mode, const struct passwd curr_user)	150✔
430	{
431	struct stat statbuf;	150✔
432
433	if (stat(directory, &statbuf) != 0 \|\| (statbuf.st_mode & S_IFMT) != S_IFDIR) {	150✔
434	logerr(gl_LOGFILE,	×
435	"User %s cannot access directory %s. Make sure it exists and is a directory.\n",
436	curr_user ? curr_user->pw_name : "<unknown>", directory);
437	return 1;	×
438	}
439	if ((mode & R_OK) && access(directory, R_OK) != 0) {	150✔
440	logerr(gl_LOGFILE, "Need read rights on directory %s for user %s.\n",	×
441	directory, curr_user ? curr_user->pw_name : "<unknown>");
442	return 1;	×
443	}
444	if ((mode & W_OK) && access(directory, W_OK) != 0) {	150✔
445	logerr(gl_LOGFILE, "Need write rights on directory %s for user %s.\n",	×
446	directory, curr_user ? curr_user->pw_name : "<unknown>");
447	return 1;	×
448	}
449	return 0;
450	}
451
452	int json_get_map_value(const char json_input, const char field_name,	76✔
453	gchar **value)
454	{
455	g_autoptr(GError) error = NULL;	152✔
456	JsonParser *jp = NULL;	76✔
457	JsonReader *jr = NULL;	76✔
458	JsonNode *root;	76✔
459	int ret = -1;	76✔
460
461	jp = json_parser_new();	76✔
462	if (!json_parser_load_from_data(jp, json_input, -1, &error)) {	76✔
463	logerr(gl_LOGFILE,	×
464	"Could not parse JSON '%s': %s\n", json_input, error->message);	×
465	goto error_unref_jp;	×
466	}
467
468	root = json_parser_get_root(jp);	76✔
469	jr = json_reader_new(root);	76✔
470
471	if (!json_reader_read_member(jr, field_name)) {	76✔
472	logerr(gl_LOGFILE, "Missing '%s' field in '%s'\n",	×
473	field_name, json_input);
474	goto error_unref_jr;	×
475	}
476	*value = g_strdup(json_reader_get_string_value(jr));	76✔
477	/* caller should handle value == NULL /
478
479	ret = 0;	76✔
480
481	error_unref_jr:	76✔
482	g_object_unref(jr);	76✔
483
484	error_unref_jp:	76✔
485	g_object_unref(jp);	76✔
486
487	return ret;	76✔
488	}
489
490	int strv_strcmp(gchar conststr_array, const gchar *s)	53✔
491	{
492	size_t i;	53✔
493
494	for (i = 0; str_array[i]; i++) {	174✔
495	if (strcmp(str_array[i], s) == 0)	173✔
496	return (int)i;	52✔
497	}
498	return -1;
499	}

stefanberger / swtpm / #2826

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