diff options
Diffstat (limited to 'src/util.cc')
| -rw-r--r-- | src/util.cc | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/src/util.cc b/src/util.cc index 9758db9c..1334b21d 100644 --- a/src/util.cc +++ b/src/util.cc @@ -370,10 +370,14 @@ dcp::ids_equal (string a, string b) } string -dcp::file_to_string (boost::filesystem::path p) +dcp::file_to_string (boost::filesystem::path p, uintmax_t max_length) { uintmax_t len = boost::filesystem::file_size (p); - char* c = new char[len]; + if (len > max_length) { + throw MiscError ("Unexpectedly long file"); + } + + char* c = new char[len + 1]; FILE* f = fopen_boost (p, "r"); if (!f) { @@ -382,9 +386,32 @@ dcp::file_to_string (boost::filesystem::path p) fread (c, 1, len, f); fclose (f); + c[len] = '\0'; string s (c); delete[] c; return s; } + +/** @param key RSA private key in PEM format (optionally with -----BEGIN... / -----END...) + * @return SHA1 fingerprint of key + */ +string +dcp::private_key_fingerprint (string key) +{ + boost::replace_all (key, "-----BEGIN RSA PRIVATE KEY-----\n", ""); + boost::replace_all (key, "\n-----END RSA PRIVATE KEY-----\n", ""); + + unsigned char buffer[4096]; + int const N = base64_decode (key, buffer, sizeof (buffer)); + + SHA_CTX sha; + SHA1_Init (&sha); + SHA1_Update (&sha, buffer, N); + uint8_t digest[20]; + SHA1_Final (digest, &sha); + + char digest_base64[64]; + return Kumu::base64encode (digest, 20, digest_base64, 64); +} |