Add bml parser and sha256 sum support.
This commit is contained in:
Brandon Wright
parent
048ed0835f
commit
14c8ebba00
349
bml.cpp
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349
bml.cpp
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@ -0,0 +1,349 @@
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#include <ctype.h>
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#include <vector>
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#include <string.h>
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#include <stdio.h>
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#include "bml.h"
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static inline bml_node *bml_node_new(void)
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{
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bml_node *node = new bml_node;
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node->data = NULL;
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node->name = NULL;
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node->depth = -1;
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}
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static char *strndup_trim (char *str, int len)
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{
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int start;
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int end;
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for (start = 0; str[start] && start != len && isblank (str[start]); start++) {}
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if (!str[start] || start >= len)
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return strdup ("");
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for (end = len - 1; isblank (str[end]) || str[end] == '\n' || str[end] == '\r'; end--) {}
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return strndup (str + start, end - start + 1);
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}
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static inline int bml_valid (char c)
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{
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return (isalnum (c) || c == '-');
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}
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static inline int islf(char c)
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{
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return (c == '\r' || c == '\n');
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}
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static inline unsigned int bml_read_depth (char *data)
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{
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unsigned int depth;
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for (depth = 0; isblank (data[depth]); depth++) {}
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return depth;
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}
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static unsigned int bml_parse_depth (bml_node *node, char **data)
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{
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unsigned int depth = bml_read_depth (*data);
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*data += depth;
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node->depth = depth;
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}
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static char *bml_parse_name (bml_node *node, char **data)
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{
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int len;
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for (len = 0; bml_valid(*(*data + len)); len++) {};
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node->name = strndup_trim (*data, len);
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*data += len;
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}
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static void bml_parse_data (bml_node *node, char **data)
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{
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char *p = *data;
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int len;
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if (p[0] == '=' && p[1] == '\"')
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{
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len = 2;
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while (p[len] && !islf (p[len]))
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len++;
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if (p[len] != '\"')
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return;
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node->data = strndup (p + 2, len - 2);
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*data += len + 1;
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}
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else if (*p == '=')
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{
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len = 1;
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while (p[len] && !islf (p[len]) && p[len] != '"' && p[len] != ' ')
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len++;
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if (p[len] == '\"')
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return;
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node->data = strndup_trim (p + 1, len - 1);
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*data += len;
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}
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else if (*p == ':')
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{
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len = 1;
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while (p[len] && !islf (p[len]))
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len++;
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node->data = strndup_trim (p + 1, len - 1);
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*data += len;
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}
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return;
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}
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static void bml_skip_empty (char **data)
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{
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char *p = *data;
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while (*p)
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{
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for (; *p && isblank (*p) ; p++) {}
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if (!islf(p[0]) && (p[0] != '/' && p[1] != '/'))
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return;
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/* Skip comment data */
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while (*p && *p != '\r' && *p != '\n')
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p++;
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/* If we found new-line, try to skip more */
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if (*p)
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{
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p++;
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*data = p;
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}
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}
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}
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static char *bml_read_line (char **data)
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{
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char *line;
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char *p;
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bml_skip_empty (data);
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line = *data;
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if (line == NULL || *line == '\0')
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return NULL;
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p = strpbrk (line, "\r\n\0");
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if (p == NULL)
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return NULL;
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if (islf (*p))
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{
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*p = '\0';
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p++;
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}
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*data = p;
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return line;
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}
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static void bml_parse_attr (bml_node *node, char **data)
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{
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char *p = *data;
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bml_node *n;
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int len;
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while (*p && !islf (*p))
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{
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if (*p != ' ')
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return;
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while (isblank (*p))
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p++;
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if (p[0] == '/' && p[1] == '/')
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break;
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n = bml_node_new ();
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len = 0;
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while (bml_valid (p[len]))
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len++;
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if (len == 0)
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return;
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n->name = strndup_trim (p, len);
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p += len;
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bml_parse_data (n, &p);
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node->attr.push_back (n);
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}
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*data = p;
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}
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static int contains_space (char *str)
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{
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for (int i = 0; str[i]; i++)
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{
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if (isblank (str[i]))
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return 1;
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}
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return 0;
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}
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static void bml_print_node (bml_node *node, int depth)
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{
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if (!node)
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return;
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for (int i = 0; i < depth * 2; i++)
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{
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printf (" ");
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}
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if (node->name)
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printf ("%s", node->name);
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if (node->data)
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{
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if (contains_space (node->data))
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printf (": \"%s\"", node->data);
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else
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printf (": %s", node->data);
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}
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for (int i = 0; i < node->attr.size(); i++)
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{
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if (node->attr[i]->name)
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{
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printf (" %s", node->attr[i]->name);
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if (node->attr[i]->data)
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{
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if (contains_space (node->attr[i]->data))
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printf ("=\"%s\"", node->attr[i]->data);
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else
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printf ("=%s", node->attr[i]->data);
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}
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}
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}
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if (depth >= 0)
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printf ("\n");
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for (int i = 0; i < node->child.size(); i++)
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{
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bml_print_node (node->child[i], depth + 1);
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}
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if (depth == 0)
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printf ("\n");
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}
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void bml_print_node (bml_node *node)
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{
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bml_print_node (node, -1);
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}
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static bml_node *bml_parse_node (char **doc)
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{
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char *line;
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bml_node *node = NULL;
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if ((line = bml_read_line (doc)))
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{
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node = bml_node_new ();
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bml_parse_depth (node, &line);
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bml_parse_name (node, &line);
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bml_parse_data (node, &line);
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bml_parse_attr (node, &line);
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}
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else
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return NULL;
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bml_skip_empty (doc);
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while (*doc && bml_read_depth (*doc) > node->depth)
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{
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bml_node *child = bml_parse_node (doc);
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if (child)
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node->child.push_back (child);
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bml_skip_empty (doc);
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}
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return node;
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}
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void bml_free_node (bml_node *node)
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{
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delete[] (node->name);
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delete[] (node->data);
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for (int i = 0; i < node->child.size(); i++)
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{
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bml_free_node (node->child[i]);
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delete node->child[i];
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}
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for (int i = 0; i < node->attr.size(); i++)
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{
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bml_free_node (node->attr[i]);
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delete node->attr[i];
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}
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return;
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}
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bml_node *bml_parse (char **doc)
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{
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bml_node *root = NULL;
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bml_node *node = NULL;
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char *ptr = *doc;
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root = bml_node_new ();
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while ((node = bml_parse_node (&ptr)))
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{
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root->child.push_back (node);
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}
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if (!root->child.size())
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{
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delete root;
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root = NULL;
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}
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return root;
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}
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bml_node *bml_parse_file (char *filename)
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{
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FILE *file = NULL;
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char *buffer = NULL;
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int file_size = 0;
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bml_node *node = NULL;
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file = fopen (filename, "r");
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if (!file)
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return NULL;
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fseek (file, 0, SEEK_END);
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file_size = ftell (file);
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fseek (file, 0, SEEK_SET);
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buffer = new char[file_size + 1];
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fread (buffer, file_size, 1, file);
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buffer[file_size] = '\0';
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fclose (file);
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node = bml_parse (&buffer);
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delete[] buffer;
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return node;
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}
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28
bml.h
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28
bml.h
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#ifndef __BML_H
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#define __BML_H
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#include <vector>
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typedef struct bml_node
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{
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char *name;
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char *data;
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int depth;
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std::vector<bml_node *> attr;
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std::vector<bml_node *> child;
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} bml_node;
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bml_node *bml_parse_file (char *filename);
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/* Parse character array into BML tree. Destructive to input. */
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bml_node *bml_parse (char **buffer);
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/* Recursively free bml_node and substructures */
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void bml_free_node (bml_node *);
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/* Print node structure to stdout */
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void bml_print_node (bml_node *);
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#endif
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@ -9,7 +9,7 @@ if test -z "$CXXFLAGS"; then
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CXXFLAGS="$CFLAGS"
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fi
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EXTRA_FLAGS="-Wall -W -pedantic -Wno-unused-parameter -Wno-unused-but-set-variable"
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EXTRA_FLAGS="-Wall -W -pedantic -Wno-unused-parameter"
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CFLAGS="$CFLAGS $EXTRA_FLAGS"
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CXXFLAGS="$CXXFLAGS $EXTRA_FLAGS"
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178
sha256.c
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178
sha256.c
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/*********************************************************************
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* Filename: sha256.c
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* Author: Brad Conte (brad AT bradconte.com)
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* Copyright:
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* Disclaimer: This code is presented "as is" without any guarantees.
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* Details: Implementation of the SHA-256 hashing algorithm.
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SHA-256 is one of the three algorithms in the SHA2
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specification. The others, SHA-384 and SHA-512, are not
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offered in this implementation.
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Algorithm specification can be found here:
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* http://csrc.nist.gov/publications/fips/fips180-2/fips180-2withchangenotice.pdf
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This implementation uses little endian byte order.
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*********************************************************************/
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/*************************** HEADER FILES ***************************/
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#include <stdlib.h>
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#include <memory.h>
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/****************************** MACROS ******************************/
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#define ROTLEFT(a,b) (((a) << (b)) | ((a) >> (32-(b))))
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#define ROTRIGHT(a,b) (((a) >> (b)) | ((a) << (32-(b))))
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#define CH(x,y,z) (((x) & (y)) ^ (~(x) & (z)))
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#define MAJ(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
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#define EP0(x) (ROTRIGHT(x,2) ^ ROTRIGHT(x,13) ^ ROTRIGHT(x,22))
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#define EP1(x) (ROTRIGHT(x,6) ^ ROTRIGHT(x,11) ^ ROTRIGHT(x,25))
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#define SIG0(x) (ROTRIGHT(x,7) ^ ROTRIGHT(x,18) ^ ((x) >> 3))
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#define SIG1(x) (ROTRIGHT(x,17) ^ ROTRIGHT(x,19) ^ ((x) >> 10))
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#define SHA256_BLOCK_SIZE 32 /* SHA256 outputs a 32 byte digest */
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/**************************** DATA TYPES ****************************/
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typedef unsigned char BYTE; /* 8-bit byte */
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typedef unsigned int WORD; /* 32-bit word, change to "long" for 16-bit machines */
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typedef struct {
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BYTE data[64];
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WORD datalen;
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unsigned long long bitlen;
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WORD state[8];
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} SHA256_CTX;
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/**************************** VARIABLES *****************************/
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static const WORD k[64] = {
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0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
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0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
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0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
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0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
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0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
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0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
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0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
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0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
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};
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/*********************** FUNCTION DEFINITIONS ***********************/
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void sha256_transform(SHA256_CTX *ctx, const BYTE data[])
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{
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WORD a, b, c, d, e, f, g, h, i, j, t1, t2, m[64];
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for (i = 0, j = 0; i < 16; ++i, j += 4)
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m[i] = (data[j] << 24) | (data[j + 1] << 16) | (data[j + 2] << 8) | (data[j + 3]);
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for ( ; i < 64; ++i)
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m[i] = SIG1(m[i - 2]) + m[i - 7] + SIG0(m[i - 15]) + m[i - 16];
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a = ctx->state[0];
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b = ctx->state[1];
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c = ctx->state[2];
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d = ctx->state[3];
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e = ctx->state[4];
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f = ctx->state[5];
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g = ctx->state[6];
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h = ctx->state[7];
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for (i = 0; i < 64; ++i) {
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t1 = h + EP1(e) + CH(e,f,g) + k[i] + m[i];
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t2 = EP0(a) + MAJ(a,b,c);
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h = g;
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g = f;
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f = e;
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e = d + t1;
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d = c;
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c = b;
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b = a;
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a = t1 + t2;
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}
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ctx->state[0] += a;
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ctx->state[1] += b;
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ctx->state[2] += c;
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ctx->state[3] += d;
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ctx->state[4] += e;
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ctx->state[5] += f;
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ctx->state[6] += g;
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ctx->state[7] += h;
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}
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void sha256_init(SHA256_CTX *ctx)
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{
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ctx->datalen = 0;
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ctx->bitlen = 0;
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ctx->state[0] = 0x6a09e667;
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ctx->state[1] = 0xbb67ae85;
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ctx->state[2] = 0x3c6ef372;
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ctx->state[3] = 0xa54ff53a;
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ctx->state[4] = 0x510e527f;
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ctx->state[5] = 0x9b05688c;
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ctx->state[6] = 0x1f83d9ab;
|
||||
ctx->state[7] = 0x5be0cd19;
|
||||
}
|
||||
|
||||
void sha256_update(SHA256_CTX *ctx, const BYTE data[], size_t len)
|
||||
{
|
||||
WORD i;
|
||||
|
||||
for (i = 0; i < len; ++i) {
|
||||
ctx->data[ctx->datalen] = data[i];
|
||||
ctx->datalen++;
|
||||
if (ctx->datalen == 64) {
|
||||
sha256_transform(ctx, ctx->data);
|
||||
ctx->bitlen += 512;
|
||||
ctx->datalen = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void sha256_final(SHA256_CTX *ctx, BYTE hash[])
|
||||
{
|
||||
WORD i;
|
||||
|
||||
i = ctx->datalen;
|
||||
|
||||
// Pad whatever data is left in the buffer.
|
||||
if (ctx->datalen < 56) {
|
||||
ctx->data[i++] = 0x80;
|
||||
while (i < 56)
|
||||
ctx->data[i++] = 0x00;
|
||||
}
|
||||
else {
|
||||
ctx->data[i++] = 0x80;
|
||||
while (i < 64)
|
||||
ctx->data[i++] = 0x00;
|
||||
sha256_transform(ctx, ctx->data);
|
||||
memset(ctx->data, 0, 56);
|
||||
}
|
||||
|
||||
/* Append to the padding the total message's length in bits and transform. */
|
||||
ctx->bitlen += ctx->datalen * 8;
|
||||
ctx->data[63] = ctx->bitlen;
|
||||
ctx->data[62] = ctx->bitlen >> 8;
|
||||
ctx->data[61] = ctx->bitlen >> 16;
|
||||
ctx->data[60] = ctx->bitlen >> 24;
|
||||
ctx->data[59] = ctx->bitlen >> 32;
|
||||
ctx->data[58] = ctx->bitlen >> 40;
|
||||
ctx->data[57] = ctx->bitlen >> 48;
|
||||
ctx->data[56] = ctx->bitlen >> 56;
|
||||
sha256_transform(ctx, ctx->data);
|
||||
|
||||
/* Since this implementation uses little endian byte ordering and SHA uses big endian,
|
||||
reverse all the bytes when copying the final state to the output hash. */
|
||||
for (i = 0; i < 4; ++i) {
|
||||
hash[i] = (ctx->state[0] >> (24 - i * 8)) & 0x000000ff;
|
||||
hash[i + 4] = (ctx->state[1] >> (24 - i * 8)) & 0x000000ff;
|
||||
hash[i + 8] = (ctx->state[2] >> (24 - i * 8)) & 0x000000ff;
|
||||
hash[i + 12] = (ctx->state[3] >> (24 - i * 8)) & 0x000000ff;
|
||||
hash[i + 16] = (ctx->state[4] >> (24 - i * 8)) & 0x000000ff;
|
||||
hash[i + 20] = (ctx->state[5] >> (24 - i * 8)) & 0x000000ff;
|
||||
hash[i + 24] = (ctx->state[6] >> (24 - i * 8)) & 0x000000ff;
|
||||
hash[i + 28] = (ctx->state[7] >> (24 - i * 8)) & 0x000000ff;
|
||||
}
|
||||
}
|
||||
|
||||
void sha256sum(unsigned char *data, unsigned int length, unsigned char *hash)
|
||||
{
|
||||
SHA256_CTX ctx;
|
||||
|
||||
sha256_init(&ctx);
|
||||
sha256_update(&ctx, data, length);
|
||||
sha256_final(&ctx, hash);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user