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Change signature and semantics of mbedtls_rsa_deduce_moduli

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Input arguments are marked as constant. Further, no double-checking is performed when a factorization of the modulus has
been found.
This commit is contained in:
Hanno Becker
2017-10-02 09:55:49 +01:00
parent 56bae95e1d
commit ba5b755f1a
2 changed files with 21 additions and 48 deletions
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20
include/mbedtls/rsa.h
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@ -96,23 +96,13 @@ extern "C" {
*
* \return
* - 0 if successful. In this case, P and Q constitute a
* factorization of N, and it is guaranteed that D and E
* are indeed modular inverses modulo P-1 and modulo Q-1.
* The values of N, D and E are unchanged. It is checked
* that P, Q are prime if a PRNG is provided.
* - A non-zero error code otherwise. In this case, the values
* of N, D, E are undefined.
* factorization of N.
* - A non-zero error code otherwise.
*
* \note The input MPI's are deliberately not declared as constant
* and may therefore be used for in-place calculations by
* the implementation. In particular, their values can be
* corrupted when the function fails. If the user cannot
* tolerate this, he has to make copies of the MPI's prior
* to calling this function. See \c mbedtls_mpi_copy for this.
*/
int mbedtls_rsa_deduce_moduli( mbedtls_mpi *N, mbedtls_mpi *D, mbedtls_mpi *E,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
mbedtls_mpi *P, mbedtls_mpi *Q );
int mbedtls_rsa_deduce_moduli( mbedtls_mpi const *N, mbedtls_mpi const *D,
mbedtls_mpi const *E, int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng, mbedtls_mpi *P, mbedtls_mpi *Q );
/**
* \brief Compute RSA private exponent from