NAME

CSSM_VerifyData

SYNOPSIS

CSSM_BOOL CSSMAPI CSSM_VerifyData
    (CSSM_CC_HANDLE CCHandle,
    const CSSM_DATA_PTR DataBufs,
    uint32 DataBufCount,
    const CSSM_DATA_PTR Signature)

DESCRIPTION

This function verifies the input data against the provided signature.

PARAMETERS

CCHandle (input)

The handle that describes the context of this cryptographic operation used to link to the CSP-managed information.

DataBufs (input)

A pointer to a vector of CSSM_DATA structures that contain the data to be operated on.

DataBufCount (input)

The number of DataBufs to be verified.

Signature (input)

A pointer to a CSSM_DATA structure which contains the signature and the size of the signature.

RETURN VALUE

A CSSM_TRUE return value signifies the signature was successfully verified. When CSSM_FALSE is returned, either the signature was not successfully verified or an error has occurred. Use CSSM_GetError to obtain the error code.

ERRORS

CSSM__CSP_INVALID_CONTEXT_HANDLE

Invalid context handle.

CSSM__CSP_INVALID_CONTEXT

Context type and operation do not match.

CSSM__CSP_INVALID_DATA_POINTER

Invalid input CSSM_DATA pointer.

CSSM__CSP_INVALID_DATA_COUNT

Invalid input data count; data count cannot be 0.

CSSM__CSP_INVALID_DATA

Invalid input CSSM_DATA buffer.

CSSM__CSP_INVALID_ALGORITHM

Unknown algorithm.

CSSM__CSP_OPERATION_UNSUPPORTED

Verify service not supported.

CSSM__CSP_OPERATION_FAILED

Cryptographic operation failed.

CSSM__CSP_INVALID_SIGNATURE

Invalid or missing signature.

CSSM__CSP_MEMORY_ERROR

Not enough memory to allocate.

CSSM__CSP_VECTOROFBUFS_UNSUPPORTED

Supports only a single buffer of input.

CSSM__CSP_INVALID_ATTR_KEY

Invalid or missing key attribute in the context.

CSSM__CSP_INVALID_KEY

Invalid or missing key data in the context attribute.

CSSM__CSP_INVALID_KEYCLASS

Key class is not public key class.

CSSM__CSP_KEY_USAGE_INCORRECT

Key usage does not allow verify.

CSSM__CSP_KEY_ALGID_MISMATCH

The supplied key does not match the operation.

CSSM__CSP_KEY_KEYHEADER_INCONSISTENT

Key header and key data is inconsistent.

CSSM__CSP_KEY_FORMAT_INCORRECT

Unknown key format.

CSSM__CSP_INVALID_KEY_SIZE_IN_BITS

Key size in bits unsupported.

SEE ALSO

CSSM_SignData, CSSM_VerifyDataInit,
CSSM_VerifyDataUpdate, CSSM_VerifyDataFinal