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Add in support for PBKDF1 with SHA-1 and MD2.

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Also a minor indenting fix.

svn path=/trunk/kdesupport/qca/; revision=402813
This commit is contained in:
Brad Hards 2005-04-03 09:31:00 +00:00
parent 878c9627ff
commit 1de05d8ff7
1 changed files with 77 additions and 6 deletions
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83
plugins/qca-openssl/qca-openssl.cpp
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@ -862,12 +862,12 @@ static QCA::Validity convert_verify_error(int err)
class opensslHashContext : public QCA::HashContext
{
public:
opensslHashContext(const EVP_MD *algorithm, QCA::Provider *p, const QString &type) : QCA::HashContext(p, type)
{
m_algorithm = algorithm;
clear();
};
opensslHashContext(const EVP_MD *algorithm, QCA::Provider *p, const QString &type) : QCA::HashContext(p, type)
{
m_algorithm = algorithm;
clear();
};
void clear()
{
EVP_DigestInit( &m_context, m_algorithm );
@ -896,6 +896,71 @@ protected:
};
class opensslPbkdf1Context : public QCA::KDFContext
{
public:
opensslPbkdf1Context(const EVP_MD *algorithm, QCA::Provider *p, const QString &type) : QCA::KDFContext(p, type)
{
m_algorithm = algorithm;
EVP_DigestInit( &m_context, m_algorithm );
}
Context *clone() const
{
return new opensslPbkdf1Context( *this );
}
QCA::SymmetricKey makeKey(const QSecureArray &secret, const QCA::InitializationVector &salt,
unsigned int keyLength, unsigned int iterationCount)
{
/* from RFC2898:
Steps:
1. If dkLen > 16 for MD2 and MD5, or dkLen > 20 for SHA-1, output
"derived key too long" and stop.
*/
if ( keyLength > (unsigned int)EVP_MD_size( m_algorithm ) ) {
std::cout << "derived key too long" << std::endl;
return QCA::SymmetricKey();
}
/*
2. Apply the underlying hash function Hash for c iterations to the
concatenation of the password P and the salt S, then extract
the first dkLen octets to produce a derived key DK:
T_1 = Hash (P || S) ,
T_2 = Hash (T_1) ,
...
T_c = Hash (T_{c-1}) ,
DK = Tc<0..dkLen-1>
*/
// calculate T_1
EVP_DigestUpdate( &m_context, (unsigned char*)secret.data(), secret.size() );
EVP_DigestUpdate( &m_context, (unsigned char*)salt.data(), salt.size() );
QSecureArray a( EVP_MD_size( m_algorithm ) );
EVP_DigestFinal( &m_context, (unsigned char*)a.data(), 0 );
// calculate T_2 up to T_c
for ( unsigned int i = 2; i <= iterationCount; ++i ) {
EVP_DigestInit( &m_context, m_algorithm );
EVP_DigestUpdate( &m_context, (unsigned char*)a.data(), a.size() );
EVP_DigestFinal( &m_context, (unsigned char*)a.data(), 0 );
}
// shrink a to become DK, of the required length
a.resize(keyLength);
/*
3. Output the derived key DK.
*/
return a;
}
protected:
const EVP_MD *m_algorithm;
EVP_MD_CTX m_context;
};
class opensslHMACContext : public QCA::MACContext
{
@ -3524,6 +3589,8 @@ public:
list += "hmac(md5)";
list += "hmac(sha1)";
list += "hmac(ripemd160)";
list += "pbkdf1(md2)";
list += "pbkdf1(sha1)";
list += "aes128-ecb";
list += "aes128-cfb";
list += "aes128-cbc";
@ -3577,6 +3644,10 @@ public:
return new opensslHashContext( EVP_md4(), this, type);
else if ( type == "md5" )
return new opensslHashContext( EVP_md5(), this, type);
else if ( type == "pbkdf1(sha1)" )
return new opensslPbkdf1Context( EVP_sha1(), this, type );
else if ( type == "pbkdf1(md2)" )
return new opensslPbkdf1Context( EVP_md2(), this, type );
else if ( type == "hmac(md5)" )
return new opensslHMACContext( EVP_md5(), this, type );
else if ( type == "hmac(sha1)" )