oysteikt/heimdal
0
0
Fork 0
Code Issues 5 Pull Requests Releases Activity

PEM encode/decoding functions.

Browse Source 
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@21307 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2007-06-25 18:23:01 +00:00
parent b442dada5d
commit fedd7ad133
1 changed files with 197 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

203
lib/hx509/file.c
View File

@@ -135,6 +135,10 @@ _hx509_write_file(const char *fn, const void *data, size_t length)
return 0;
}
/*
*
*/
static void
header(FILE *f, const char *type, const char *str)
{
@@ -143,22 +147,23 @@ header(FILE *f, const char *type, const char *str)
int
hx509_pem_write(hx509_context context, const char *type,
char **headers, FILE *f,
hx509_pem_header *headers, FILE *f,
const void *data, size_t size)
{
const char *p = data;
size_t length;
char *line;
int i;
#define ENCODE_LINE_LENGTH 54
header(f, "BEGIN", type);
for(i = 0; headers && headers[i]; i++)
fprintf(f, "%s\n", headers[i]);
if (i > 0)
fprintf(f, "\n");
while (headers) {
fprintf(f, "%s: %s\n%s",
headers->header, headers->value,
headers->next ? "" : "\n");
headers = headers->next;
}
while (size > 0) {
ssize_t l;
@@ -183,3 +188,189 @@ hx509_pem_write(hx509_context context, const char *type,
return 0;
}
/*
*
*/
int
hx509_pem_add_header(hx509_pem_header **headers,
const char *header, const char *value)
{
hx509_pem_header *h;
h = calloc(1, sizeof(*h));
if (h == NULL)
return ENOMEM;
h->header = strdup(header);
if (h->header == NULL) {
free(h);
return ENOMEM;
}
h->value = strdup(value);
if (h->value == NULL) {
free(h->header);
free(h);
return ENOMEM;
}
h->next = *headers;
*headers = h;
return 0;
}
void
hx509_pem_free_header(hx509_pem_header *headers)
{
hx509_pem_header *h;
while (headers) {
h = headers;
headers = headers->next;
free(h->header);
free(h->value);
free(h);
}
}
/*
*
*/
const char *
hx509_pem_find_header(const hx509_pem_header *h, const char *header)
{
while(h) {
if (strcmp(header, h->header) == 0)
return h->value;
h = h->next;
}
return NULL;
}
/*
*
*/
int
hx509_pem_read(hx509_context context,
FILE *f,
hx509_pem_read_func func,
void *ctx)
{
hx509_pem_header *headers = NULL;
char *type = NULL;
void *data = NULL;
size_t len = 0;
char buf[1024];
int ret = HX509_PARSING_KEY_FAILED;
enum { BEFORE, SEARCHHEADER, INHEADER, INDATA, DONE } where;
where = BEFORE;
while (fgets(buf, sizeof(buf), f) != NULL) {
char *p;
int i;
i = strcspn(buf, "\n");
if (buf[i] == '\n') {
buf[i] = '\0';
if (i > 0)
i--;
}
if (buf[i] == '\r') {
buf[i] = '\0';
if (i > 0)
i--;
}
switch (where) {
case BEFORE:
if (strncmp("-----BEGIN ", buf, 11) == 0) {
type = strdup(buf + 11);
if (type == NULL)
break;
p = strchr(type, '-');
if (p)
*p = '\0';
where = SEARCHHEADER;
}
break;
case SEARCHHEADER:
p = strchr(buf, ':');
if (p == NULL) {
where = INDATA;
goto indata;
}
/* FALLTHOUGH */
case INHEADER:
if (buf[0] == '\0') {
where = INDATA;
break;
}
p = strchr(buf, ':');
if (p) {
*p++ = '\0';
while (isspace((int)*p))
p++;
ret = hx509_pem_add_header(&headers, buf, p);
if (ret)
abort();
}
break;
case INDATA:
indata:
if (strncmp("-----END ", buf, 9) == 0) {
where = DONE;
break;
}
p = emalloc(i);
i = base64_decode(buf, p);
if (i < 0) {
free(p);
goto out;
}
data = erealloc(data, len + i);
memcpy(((char *)data) + len, p, i);
free(p);
len += i;
break;
case DONE:
abort();
}
if (where == DONE) {
ret = (*func)(context, type, headers, data, len, ctx);
out:
free(data);
data = NULL;
len = 0;
free(type);
type = NULL;
where = BEFORE;
hx509_pem_free_header(headers);
headers = NULL;
if (ret)
break;
}
}
if (where != BEFORE) {
hx509_set_error_string(context, 0, HX509_PARSING_KEY_FAILED,
"File ends before end of PEM end tag");
ret = HX509_PARSING_KEY_FAILED;
}
if (data)
free(data);
if (type)
free(type);
if (headers)
hx509_pem_free_header(headers);
return ret;
}