1.39 CRYPT_RSA_PublicEncrypt Function

C

int CRYPT_RSA_PublicEncrypt(
    CRYPT_RSA_CTX* rsa,
    unsigned char* out,
    unsigned int outSz,
    const unsigned char* in,
    unsigned int inSz,
    CRYPT_RNG_CTX* rng
);

Description

This function encrypts a data block using a public key.

Preconditions

The context must be initialized using CRYPT_RSA_Initialize and the public key decoded using CRYPT_RSA_PublicKeyDecode prior to calling this function. The random number generator must be initialized with a call to CRYPT_RNG_Initialize.

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 encrypted
inSz	Size of input buffer
rng	Pointer to Random Number Generator (RNG) context

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;
CRYPT_RNG_CTX mcRng;
int           ret;
unsigned int  keySz = (unsigned int)sizeof(client_key_der_1024);
byte          out1[256];

ret = CRYPT_RSA_Initialize(&mcRsa);
ret = CRYPT_RNG_Initialize(&mcRng);
ret = CRYPT_RSA_PublicKeyDecode(&mcRsa, client_key_der_1024, keySz);
ret = CRYPT_RSA_PublicEncrypt(&mcRsa, out1, sizeof(out1), ourData, RSA_TEST_SIZE, &mcRng);