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Update documentation and add comments

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Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
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Gabor Mezei
2023-02-13 16:29:05 +01:00
parent 5c9f401e47
commit a264831cff
2 changed files with 11 additions and 4 deletions
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9
library/ecp_curves.c
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@ -4926,10 +4926,13 @@ int mbedtls_ecp_mod_p192_raw(mbedtls_mpi_uint *Np, size_t Nn)
RESET; RESET;
ADD_LAST; NEXT; /* Use the reduction for the carry as well:
ADD_LAST; NEXT; * 2^192 * last_carry = 2^64 * last_carry + last_carry mod P192
*/
ADD_LAST; NEXT; // A0 += last_carry
ADD_LAST; NEXT; // A1 += last_carry
LAST; LAST; // A2 += carry
return 0; return 0;
} }

6
library/ecp_invasive.h
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@ -79,9 +79,13 @@ int mbedtls_ecp_gen_privkey_mx(size_t n_bits,
#if defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED) #if defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED)
/** Fast quasi-reduction modulo p192 (FIPS 186-3 D.2.1) /** Fast quasi-reduction modulo p192 (FIPS 186-3 D.2.1)
*
* This operation expects a 384 bit MPI and the result of the reduction
* is a 192 bit MPI.
* *
* \param[in,out] Np The address of the MPI to be converted. * \param[in,out] Np The address of the MPI to be converted.
* Must have twice as many limbs as \p Nn. * Must have twice as many limbs as the modulus so
* 384 bits in length.
* \param[in] Nn The length of \p Np in limbs. * \param[in] Nn The length of \p Np in limbs.
*/ */
MBEDTLS_STATIC_TESTABLE MBEDTLS_STATIC_TESTABLE