flewkey/cuberite-2a
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Added RSA encryption to crypto wrappers.

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This commit is contained in:
madmaxoft 2014-01-25 19:19:17 +01:00
parent a2dfb28537
commit ca0e51d89c
2 changed files with 39 additions and 0 deletions
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34
src/Crypto.cpp
View File

@ -196,6 +196,40 @@ int cRSAPrivateKey::Decrypt(const Byte * a_EncryptedData, size_t a_EncryptedLeng
int cRSAPrivateKey::Encrypt(const Byte * a_PlainData, size_t a_PlainLength, Byte * a_EncryptedData, size_t a_EncryptedMaxLength)
{
if (a_EncryptedMaxLength < m_Rsa.len)
{
LOGD("%s: Invalid a_EncryptedMaxLength: got %u, exp at least %u",
__FUNCTION__, (unsigned)a_EncryptedMaxLength, (unsigned)(m_Rsa.len)
);
ASSERT(!"Invalid a_DecryptedMaxLength!");
return -1;
}
if (a_PlainLength < m_Rsa.len)
{
LOGD("%s: Invalid a_PlainLength: got %u, exp at least %u",
__FUNCTION__, (unsigned)a_PlainLength, (unsigned)(m_Rsa.len)
);
ASSERT(!"Invalid a_PlainLength!");
return -1;
}
size_t DecryptedLength;
int res = rsa_pkcs1_encrypt(
&m_Rsa, ctr_drbg_random, &m_Ctr_drbg, RSA_PUBLIC,
a_PlainLength, a_PlainData, a_EncryptedData
);
if (res != 0)
{
return -1;
}
return (int)DecryptedLength;
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cAESCFBDecryptor:

5
src/Crypto.h
View File

@ -43,6 +43,11 @@ public:
Returns the number of bytes decrypted, or negative number for error. */
int Decrypt(const Byte * a_EncryptedData, size_t a_EncryptedLength, Byte * a_DecryptedData, size_t a_DecryptedMaxLength);
/** Encrypts the data using RSAES-PKCS#1 algorithm.
Both a_EncryptedData and a_DecryptedData must be at least <KeySizeBytes> bytes large.
Returns the number of bytes decrypted, or negative number for error. */
int Encrypt(const Byte * a_PlainData, size_t a_PlainLength, Byte * a_EncryptedData, size_t a_EncryptedMaxLength);
protected:
rsa_context m_Rsa;
entropy_context m_Entropy;