wilde@134: #include <ctype.h>
wilde@131: #include <stdbool.h>
aheinecke@59: #include <stdio.h>
aheinecke@59: #include <stdlib.h>
aheinecke@59: #include <string.h>
aheinecke@59: #include <assert.h>
aheinecke@59: 
aheinecke@160: #include <polarssl/base64.h>
aheinecke@160: 
wilde@143: /* Remarks regarding the "Flawfinder: ignore" comments in this file:
wilde@143:  *
wilde@143:  * - strlen:
wilde@143:  *
wilde@143:  *   It's true that strlen might crash if input is not null
wilde@143:  *   terminated.  But by design there is not safe way to get the
wilde@143:  *   length of an string in C, and defining an additional length
wilde@143:  *   parameter for string parameter will only transfere the problem to
wilde@143:  *   the caller.
wilde@143:  */
wilde@143: 
aheinecke@59: static void
aheinecke@59: out_of_core(void)
aheinecke@59: {
aheinecke@59:     fputs("\nfatal: out of memory\n", stderr);
aheinecke@59:     exit(2);
aheinecke@59: }
aheinecke@59: void *
aheinecke@59: xmalloc( size_t n )
aheinecke@59: {
aheinecke@59:     void *p = malloc( n );
aheinecke@59:     if( !p )
aheinecke@59:         out_of_core();
aheinecke@59:     return p;
aheinecke@59: }
aheinecke@59: 
aheinecke@59: void *
aheinecke@59: xrealloc( void *a, size_t n )
aheinecke@59: {
aheinecke@59:     void *p = realloc( a, n );
aheinecke@59:     if( !p )
aheinecke@59:         out_of_core();
aheinecke@59:     return p;
aheinecke@59: }
aheinecke@59: 
aheinecke@59: char *
aheinecke@60: xstrndup( const char *string, const size_t len )
aheinecke@59: {
aheinecke@60:     char *p = xmalloc( len + 1 );
aheinecke@60:     memcpy( p, string, len );
aheinecke@60:     p[len] = '\0';
aheinecke@59:     return p;
aheinecke@59: }
aheinecke@59: 
aheinecke@59: unsigned int
aheinecke@59: strv_length (char **str_array)
aheinecke@59: {
aheinecke@59:     unsigned int i = 0;
aheinecke@59: 
aheinecke@59:     if (!str_array)
aheinecke@59:         return 0;
aheinecke@59: 
aheinecke@59:     while (str_array[i])
aheinecke@59:         ++i;
aheinecke@59: 
aheinecke@59:     return i;
aheinecke@59: }
aheinecke@59: 
wilde@116: void strv_append (char ***pArray, const char *string, const size_t len)
aheinecke@59: {
aheinecke@60:     unsigned int old_len = 0;
aheinecke@60: 
aheinecke@60:     if (!*pArray) {
aheinecke@60:         *pArray = xmalloc(2 * sizeof(char*));
aheinecke@60:         (*pArray)[0] = xstrndup(string, len);
aheinecke@60:         (*pArray)[1] = NULL;
aheinecke@60:         return;
aheinecke@60:     }
aheinecke@60:     old_len = strv_length(*pArray);
aheinecke@59:     *pArray = xrealloc(*pArray, sizeof(char**) * (old_len + 2));
aheinecke@59: 
aheinecke@60:     (*pArray)[old_len] = xstrndup(string, len);
aheinecke@60:     (*pArray)[old_len + 1] = NULL;
aheinecke@59: }
aheinecke@59: 
aheinecke@91: void
aheinecke@91: str_append_str(char **pDst, size_t *dst_len, const char *appendage, const size_t len)
aheinecke@59: {
aheinecke@59:     if (!appendage)
aheinecke@59:         return;
aheinecke@59: 
aheinecke@91:     if (!(*pDst)) {
aheinecke@60:         *pDst = xstrndup(appendage, len);
aheinecke@91:         *dst_len = len;
aheinecke@60:     } else {
aheinecke@91:         size_t new_size = (*dst_len) + len + 1;
aheinecke@91:         char *p_old = *pDst;
aheinecke@91:         *pDst = xmalloc(new_size);
aheinecke@91:         strncpy(*pDst, p_old, *dst_len);
aheinecke@91:         strncpy(*pDst + *dst_len, appendage, len);
aheinecke@91:         *dst_len = new_size - 1;
aheinecke@91:         (*pDst)[*dst_len] = '\0';
aheinecke@91:         free (p_old);
aheinecke@60:     }
aheinecke@59: }
aheinecke@59: 
aheinecke@59: void
wilde@116: strv_free (char **str_array)
aheinecke@59: {
aheinecke@59:   if (str_array)
aheinecke@59:     {
aheinecke@59:       int i;
aheinecke@59: 
aheinecke@59:       for (i = 0; str_array[i] != NULL; i++)
aheinecke@59:         free (str_array[i]);
aheinecke@59: 
aheinecke@59:       free (str_array);
aheinecke@59:     }
aheinecke@59: }
wilde@131: 
wilde@131: bool
wilde@131: str_equal (char *s1, char *s2)
wilde@131: {
wilde@143:   size_t l1 = strlen(s1);       /* Flawfinder: ignore */
wilde@143:   size_t l2 = strlen(s2);       /* Flawfinder: ignore */
wilde@131:   if ((l1 == l2) &&
wilde@136:       (strcmp(s1, s2) == 0))
wilde@131:     return true;
wilde@131:   else
wilde@131:     return false;
wilde@131: }
wilde@131: 
wilde@131: bool
wilde@131: str_starts_with (char *s1, char *s2)
wilde@131: {
wilde@143:   size_t l2 = strlen(s2);       /* Flawfinder: ignore */
wilde@143:   if (strncmp(s1, s2, l2) == 0)
wilde@131:     return true;
wilde@131:   else
wilde@131:     return false;
wilde@131: }
wilde@133: 
wilde@133: void
wilde@133: str_trim (char **s)
wilde@133: {
wilde@133:   size_t i;
wilde@135:   if (*s != NULL)
wilde@135:     {
wilde@135:       while (isspace(**s))
wilde@135:         (*s)++;
wilde@143:       i = strlen(*s);           /* Flawfinder: ignore */
wilde@135:       while (isspace((*s)[--i]))
wilde@135:         (*s)[i] = '\0';
wilde@135:     }
wilde@133: }
aheinecke@160: 
aheinecke@160: int str_base64_decode(char **dst, size_t *dst_size, char *src,
aheinecke@160:                       size_t src_size)
aheinecke@160: {
aheinecke@160:     int ret = -1;
aheinecke@160: 
aheinecke@160:     if (!dst || *dst) {
aheinecke@160:         return -1;
aheinecke@160:     }
aheinecke@160: 
aheinecke@160:     /* Check the needed size for the buffer */
aheinecke@160:     ret = base64_decode(NULL, dst_size,
aheinecke@160:                         (unsigned char *)src, src_size);
aheinecke@160: 
aheinecke@160:     if (ret != 0 && ret != POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL) {
aheinecke@160:         return ret;
aheinecke@160:     }
aheinecke@160: 
aheinecke@160:     *dst = xmalloc(*dst_size);
aheinecke@160:     memset (*dst, 0, *dst_size);
aheinecke@160: 
aheinecke@160:     ret = base64_decode((unsigned char *)*dst, dst_size,
aheinecke@160:                         (unsigned char *)src, src_size);
aheinecke@183:     if (ret) {
aheinecke@160:         free (*dst);
aheinecke@160:         *dst = NULL;
aheinecke@183:         *dst_size = 0;
aheinecke@160:     }
aheinecke@160:     return ret;
aheinecke@160: }