#include "crypt_backend.h"
#include "fd.h"
#include "base64.h"
-#include "portable_io.h"
//#define GCRYPT_DEBUG 1
return gcry_strerror(gcry_err_code(gret));
}
-/** Private PEM keys (legacy format) start with this header. */
-#define PRIVATE_PEM_KEY_HEADER "-----BEGIN RSA PRIVATE KEY-----"
-/** Private OPENSSH keys (RFC4716) start with this header. */
-#define PRIVATE_OPENSSH_KEY_HEADER "-----BEGIN OPENSSH PRIVATE KEY-----"
-/** Private PEM keys (legacy format) end with this footer. */
-#define PRIVATE_PEM_KEY_FOOTER "-----END RSA PRIVATE KEY-----"
-/** Private OPENSSH keys (RFC4716) end with this footer. */
-#define PRIVATE_OPENSSH_KEY_FOOTER "-----END OPENSSH PRIVATE KEY-----"
-/** Legacy PEM keys (openssh-7.7 and earlier, paraslash.0.6.2 and earlier) */
-#define PKT_PEM (0)
-/** OPENSSH keys (since openssh-7.8, paraslash.0.6.3) */
-#define PKT_OPENSSH (1)
-
-static int decode_private_key(const char *key_file, unsigned char **result,
- size_t *blob_size)
-{
- int ret, ret2, i, j, key_type;
- void *map;
- size_t map_size, key_size;
- unsigned char *blob = NULL;
- char *begin, *footer, *key;
-
- ret = mmap_full_file(key_file, O_RDONLY, &map, &map_size, NULL);
- if (ret < 0)
- goto out;
- ret = -E_KEY_MARKER;
- if (strncmp(map, PRIVATE_PEM_KEY_HEADER,
- strlen(PRIVATE_PEM_KEY_HEADER)) == 0) {
- key_type = PKT_PEM;
- begin = map + strlen(PRIVATE_PEM_KEY_HEADER);
- footer = strstr(map, PRIVATE_PEM_KEY_FOOTER);
- PARA_INFO_LOG("detected legacy PEM key %s\n", key_file);
- } else if (strncmp(map, PRIVATE_OPENSSH_KEY_HEADER,
- strlen(PRIVATE_OPENSSH_KEY_HEADER)) == 0) {
- key_type = PKT_OPENSSH;
- begin = map + strlen(PRIVATE_OPENSSH_KEY_HEADER);
- footer = strstr(map, PRIVATE_OPENSSH_KEY_FOOTER);
- PARA_INFO_LOG("detected openssh key %s\n", key_file);
- } else
- goto unmap;
- if (!footer)
- goto unmap;
- /* skip whitespace at the beginning */
- for (; begin < footer; begin++) {
- if (para_isspace(*begin))
- continue;
- break;
- }
- ret = -E_KEY_MARKER;
- if (begin >= footer)
- goto unmap;
-
- key_size = footer - begin;
- key = para_malloc(key_size + 1);
- for (i = 0, j = 0; begin + i < footer; i++) {
- if (para_isspace(begin[i]))
- continue;
- key[j++] = begin[i];
- }
- key[j] = '\0';
- ret = base64_decode(key, j, (char **)&blob, blob_size);
- free(key);
- if (ret < 0)
- goto unmap;
- ret = key_type;
-unmap:
- ret2 = para_munmap(map, map_size);
- if (ret >= 0 && ret2 < 0)
- ret = ret2;
- if (ret < 0) {
- free(blob);
- blob = NULL;
- }
-out:
- *result = blob;
- return ret;
-}
-
/** ASN Types and their code. */
enum asn1_types {
/** The next object is an integer. */