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AI_EC_DSAWithDigest
68 RSA BSAFE Crypto-C Library Reference Manual
AI_EC_DSAWithDigest
Purpose:
This AI allows you to create or verify SHA1 ECDSA signatures. It is passed the
plaintext and computes the SHA1 digest as well as the ECDSA signature of that
digest. See
AI_EC_DSA for the ECDSA algorithm type without the SHA1 digest.
Type of information this allows you to use:
the specified digest algorithm combined with the ECDSA signature algorithm for
performing ECDSA signing and verifying as defined in X9.62. The only digest method
supported in this API is SHA1.
Format of info supplied to B_SetAlgorithmInfo:
pointer to a B_DIGEST_SPECIFIER structure:
Crypto-C 4.3 supports only
AI_SHA1 as a
digestInfoType
, with NULL_PTR as the
digestInfoParams
.
Format of info returned by B_GetAlgorithmInfo:
pointer to a B_DIGEST_SPECIFIER structure.
Crypto-C procedures to use with algorithm object:
B_SignInit, B_SignUpdate, B_SignFinal, B_VerifyInit, B_VerifyUpdate, and
B_VerifyFinal. You must pass an initialized random algorithm in B_SignFinal, but
may pass (
B_ALGORITHM_OBJ)NULL_PTR for all other
randomAlgorithm
arguments.
Algorithm methods to include in application's algorithm chooser:
For signing, AM_ECFP_DSA_SIGN for odd prime fields and AM_ECF2POLY_DSA_SIGN for
an even characteristic. For verifying,
AM_ECFP_DSA_VERIFY for odd prime fields and
typedef struct {
B_INFO_TYPE digestInfoType;
POINTER digestInfoParams;
} B_DIGEST_SPECIFIER;