Visible to Intel only — GUID: GUID-0F48FFC6-19B6-438C-97E0-915B70E7B577
Visible to Intel only — GUID: GUID-0F48FFC6-19B6-438C-97E0-915B70E7B577
mbx_rsa_private
Performs the private key RSA decryption operation.
Syntax
mbx_status mbx_rsa_private_mb8(const int8u* const from_pa[8], int8u* const to_pa[8], const int64u* const d_pa[8], const int64u* const n_pa[8], int rsaBitlen, const mbx_RSA_Method* m, int8u* pBuffer);
mbx_status mbx_rsa_private_ssl_mb8(const int8u* const from_pa[8], int8u* const to_pa[8], const BIGNUM* const d_pa[8], const BIGNUM* const n_pa[8], int rsaBitlen);
Include Files
crypto_mb/rsa.h
Parameters
from_pa |
Array of pointers to the ciphertext data vectors. |
to_pa |
Array of pointers to the recovered data vectors. |
d_pa |
Array of pointers to the RSAs private exponent vectors. |
n_pa |
Array of pointers to the RSAs modulus vectors. |
rsaBitLen |
Size of RSAs moduli in bits. |
m |
Pointer to the pre-defined data structure specified by the RSA encryption operation. |
pBuffer |
Pointer to the work buffer. |
Description
The mbx_rsa_private() function performs independent RSA private key operations using RSA private key in form of a pair - private exponent (d) and modulus (n). The exponents are passed through d_pa and moduli are passed though n_pa parameters. The size of RSAs moduli and private exponents must be the same and equal to rsaBitlen bits. The function decrypts ciphertexts specified by the from_pa parameter in parallel, and stores recovered ciphertexts in the memory locations specified by the to_pa parameter. Memory buffers of the plain- and ciphertext must be ceil(rsaBitlen/8) bytes length.
At the moment, RSA-10024, RSA-2048, RSA-3072and RSA-4096 are supported only. If m is NULL, the functionuses mbx_RSA_private_Method(rsaBitsize). If m is not NULL, it must be assigned toeither mbx_RSA1K_ private_Method(), mbx_RSA2K_ private_Method(), mbx_RSA3K_ private_Method() or mbx_RSA4K_ private_Method() and match to rsaBitlen value.
If pBuffer is NULL, then the function allocated a work buffer of suitable size dynamically. Anallocated buffer will be released before the function return. If the workbuffer is allocated in the application, it affects performancepositively. Thembx_RSA_Method_BufSize() function returns the size of the work buffer requiredfor the operation.
The function itself does not support any kind of padding. The application is responsible for the padding if it is required.
Return Values
The mbx_rsa_private() function returns the status that indicates whether the operation completed successfully or not. The status value of 0 indicates that all operations completed successfully. The error condition can be analyzed by the MBX_GET_STS() call.
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