[Botan-devel] Dubious MinGW error messages

[Hans Mull]

Hi!
I've just startet using botan and want to encrypt a string with a string
password so I've modified the code from the tutorial slightly (removed
the DataSink stuff etc.). When using Botan 1.6.4 on
Win32/Code::Blocks/MinGW 5.1.3 the comppiler complains about many
things. This is my code:

string botanEncrypt(string plaintext, string passphrase, string cipher)
{
    ///Adapter code
    stringstream ptss(plaintext);
    stringstream ctss;
    ///Botan code
    LibraryInitializer init;
    S2K* s2k = get_s2k("PBKDF2(SHA-1)");
    s2k->set_iterations(4096);
    s2k->new_random_salt(8);
    SecureVector<byte> the_salt = s2k->current_salt();
    SymmetricKey master_key = s2k->derive_key(48, passphrase);

    KDF* kdf = get_kdf("KDF2(SHA-1)");
    SymmetricKey key = kdf->derive_key(20, master_key, "cipher key");
    SymmetricKey mac_key = kdf->derive_key(20, master_key, "hmac key");
    InitializationVector iv = kdf->derive_key(8, master_key, "cipher iv");
    Pipe pipe
    (
        new Fork
        (
                get_cipher(cipher, key, iv, ENCRYPTION),
            new MAC_Filter("HMAC(SHA-1)", mac_key)
        )
    );
    ctss << (const char*)the_salt.ptr();

    pipe.start_msg();
    ptss >> pipe;
    pipe.end_msg();

    SecureVector<byte> hmac = pipe.read_all(1);
    ctss << (const char*)hmac.ptr();

    return ctss.str();

}

The error messages are:
C:\Dokumente und
Einstellungen\User\Desktop\1x1\trunk\TextCrypter\CryptoWrappers.h||In
function `std::string botanEncrypt(std::string, std::string, std::string)':|
C:\Dokumente und
Einstellungen\User\Desktop\1x1\trunk\TextCrypter\CryptoWrappers.h|30|error:
no matching function for call to `Botan::KDF::derive_key(int,
Botan::SymmetricKey&, const char[11])'|
C:\MinGW\include\botan\pk_util.h|53|note: candidates are:
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::MemoryRegion<Botan::byte>&, const std::string&) const|
C:\MinGW\include\botan\pk_util.h|55|note:                
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::MemoryRegion<Botan::byte>&, const
Botan::MemoryRegion<Botan::byte>&) const|
C:\MinGW\include\botan\pk_util.h|57|note:                
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::MemoryRegion<Botan::byte>&, const Botan::byte*,
Botan::u32bit) const|
C:\MinGW\include\botan\pk_util.h|60|note:                
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::byte*, Botan::u32bit, const std::string&) const|
C:\MinGW\include\botan\pk_util.h|62|note:                
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::byte*, Botan::u32bit, const Botan::byte*, Botan::u32bit) const|
C:\Dokumente und
Einstellungen\User\Desktop\1x1\trunk\TextCrypter\CryptoWrappers.h|31|error:
no matching function for call to `Botan::KDF::derive_key(int,
Botan::SymmetricKey&, const char[9])'|
C:\MinGW\include\botan\pk_util.h|53|note: candidates are:
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::MemoryRegion<Botan::byte>&, const std::string&) const|
C:\MinGW\include\botan\pk_util.h|55|note:                
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::MemoryRegion<Botan::byte>&, const
Botan::MemoryRegion<Botan::byte>&) const|
C:\MinGW\include\botan\pk_util.h|57|note:                
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::MemoryRegion<Botan::byte>&, const Botan::byte*,
Botan::u32bit) const|
C:\MinGW\include\botan\pk_util.h|60|note:                
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::byte*, Botan::u32bit, const std::string&) const|
C:\MinGW\include\botan\pk_util.h|62|note:                
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::byte*, Botan::u32bit, const Botan::byte*, Botan::u32bit) const|
C:\Dokumente und
Einstellungen\User\Desktop\1x1\trunk\TextCrypter\CryptoWrappers.h|32|error:
no matching function for call to `Botan::KDF::derive_key(int,
Botan::SymmetricKey&, const char[10])'|
C:\MinGW\include\botan\pk_util.h|53|note: candidates are:
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::MemoryRegion<Botan::byte>&, const std::string&) const|
C:\MinGW\include\botan\pk_util.h|55|note:                
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::MemoryRegion<Botan::byte>&, const
Botan::MemoryRegion<Botan::byte>&) const|
C:\MinGW\include\botan\pk_util.h|57|note:                
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::MemoryRegion<Botan::byte>&, const Botan::byte*,
Botan::u32bit) const|
C:\MinGW\include\botan\pk_util.h|60|note:                
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::byte*, Botan::u32bit, const std::string&) const|
C:\MinGW\include\botan\pk_util.h|62|note:                
Botan::SecureVector<Botan::byte> Botan::KDF::derive_key(Botan::u32bit,
const Botan::byte*, Botan::u32bit, const Botan::byte*, Botan::u32bit) const|
C:\Dokumente und
Einstellungen\User\Desktop\1x1\trunk\TextCrypter\CryptoWrappers.h|41|error:
'class Botan::SecureVector<Botan::byte>' has no member named 'ptr'|
C:\Dokumente und
Einstellungen\User\Desktop\1x1\trunk\TextCrypter\CryptoWrappers.h|48|error:
'class Botan::SecureVector<Botan::byte>' has no member named 'ptr'|
||=== Build finished: 5 errors, 0 warnings ===|

Which function should I use instead the one from the tutorial? I think
these error messages appear because the tutorial is a bit outdated.
It would be kind if you help me!

Thanks in advance, Hans