1.37 CRYPT_RSA_PrivateDecrypt Function

C

int CRYPT_RSA_PrivateDecrypt(
    CRYPT_RSA_CTX* rsa, 
    unsigned char* out, 
    unsigned int outSz, 
    const unsigned char* in, 
    unsigned int inSz
);

Description

This function decrypts a data block using a private key.

Preconditions

The context must be initialized using CRYPT_RSA_Initialize and the private key decoded using CRYPT_RSA_PrivateKeyDecode prior to calling this function.

Parameters


Parameters	Description
rsa	Pointer to context which saves state between calls.
out	Pointer to output buffer to store results.
outSz	Size of output buffer.
in	Pointer to source buffer to be decrypted.
inSz	Size of input buffer.

Returns

BAD_FUNC_ARG - An invalid pointer was passed to the function.
int - Size of the actual output.

Remarks

None.

Example

CRYPT_RSA_CTX mcRsa;
int           ret;
unsigned int  keySz = (unsigned int)sizeof(client_key_der_1024);
byte          out1[256];

ret = CRYPT_RSA_Initialize(&mcRsa);
ret = CRYPT_RSA_PrivateKeyDecode(&mcRsa, client_key_der_1024, keySz);
ret = CRYPT_RSA_PrivateDecrypt(&mcRsa, out2, sizeof(out2), out1, RSA_TEST_SIZE);