crypto_signature.h

Overview

Defines APIs for signature verification.

Header file: <CryptoArchitectureKit/crypto_signature.h>

Library: libohcrypto.so

System capability: SystemCapability.Security.CryptoFramework

Since: 12

Related module: CryptoSignatureApi

Summary

Structs

Name	typedef Keyword	Description
OH_CryptoVerify	OH_CryptoVerify	Defines the data used for signature verification.
OH_CryptoSign	OH_CryptoSign	Defines a struct for signing.
OH_CryptoEccSignatureSpec	OH_CryptoEccSignatureSpec	Defines a struct for ECC signing specifications.

Enums

Name	typedef Keyword	Description
CryptoSignature_ParamType	CryptoSignature_ParamType	Enumerates the types of signature verification parameters.

Functions

Name	Description
OH_Crypto_ErrCode OH_CryptoVerify_Create(const char *algoName, OH_CryptoVerify **verify)	Creates a Verify instance for signature verification. Note: The created resource must be destroyed by calling OH_CryptoVerify_Destroy.
OH_Crypto_ErrCode OH_CryptoVerify_Init(OH_CryptoVerify *ctx, OH_CryptoPubKey *pubKey)	Initializes a Verify instance by using the public key.
OH_Crypto_ErrCode OH_CryptoVerify_Update(OH_CryptoVerify *ctx, Crypto_DataBlob *in)	Updates the data to be verified.
bool OH_CryptoVerify_Final(OH_CryptoVerify *ctx, Crypto_DataBlob *in, Crypto_DataBlob *signData)	Verifies the signature of the data.
OH_Crypto_ErrCode OH_CryptoVerify_Recover(OH_CryptoVerify *ctx, Crypto_DataBlob *signData, Crypto_DataBlob *rawSignData)	Restores the raw signature data. Note: After the use is complete, the memory for storing the rawSignData parameter must be released by calling OH_Crypto_FreeDataBlob.
const char *OH_CryptoVerify_GetAlgoName(OH_CryptoVerify *ctx)	Obtains the signature verification algorithm.
OH_Crypto_ErrCode OH_CryptoVerify_SetParam(OH_CryptoVerify *ctx, CryptoSignature_ParamType type, Crypto_DataBlob *value)	Sets a signature verification parameter.
OH_Crypto_ErrCode OH_CryptoVerify_GetParam(OH_CryptoVerify *ctx, CryptoSignature_ParamType type, Crypto_DataBlob *value)	Obtains a signature verification parameter. Note: After the use is complete, the memory for storing the value parameter must be released by calling OH_Crypto_FreeDataBlob.
void OH_CryptoVerify_Destroy(OH_CryptoVerify *ctx)	Destroys a Verify instance.
OH_Crypto_ErrCode OH_CryptoSign_Create(const char *algoName, OH_CryptoSign **sign)	Creates a signature instance based on the given algorithm name. Note: The created resource must be destroyed by calling OH_CryptoSign_Destroy.
OH_Crypto_ErrCode OH_CryptoSign_Init(OH_CryptoSign *ctx, OH_CryptoPrivKey *privKey)	Initializes a signature instance.
OH_Crypto_ErrCode OH_CryptoSign_Update(OH_CryptoSign *ctx, const Crypto_DataBlob *in)	Updates the data to be signed.
OH_Crypto_ErrCode OH_CryptoSign_Final(OH_CryptoSign *ctx, const Crypto_DataBlob *in, Crypto_DataBlob *out)	Finalizes the signing operation. Note: After the use is complete, the memory for storing the out parameter must be released by calling OH_Crypto_FreeDataBlob.
const char *OH_CryptoSign_GetAlgoName(OH_CryptoSign *ctx)	Obtains the algorithm name of a signature instance.
OH_Crypto_ErrCode OH_CryptoSign_SetParam(OH_CryptoSign *ctx, CryptoSignature_ParamType type, const Crypto_DataBlob *value)	Sets parameters for a signature instance.
OH_Crypto_ErrCode OH_CryptoSign_GetParam(OH_CryptoSign *ctx, CryptoSignature_ParamType type, Crypto_DataBlob *value)	Obtains the specified parameter from a signature instance. Note: After the use is complete, the memory for storing the value parameter must be released by calling OH_Crypto_FreeDataBlob.
void OH_CryptoSign_Destroy(OH_CryptoSign *ctx)	Destroys a signature instance.
OH_Crypto_ErrCode OH_CryptoEccSignatureSpec_Create(Crypto_DataBlob *eccSignature, OH_CryptoEccSignatureSpec **spec)	Creates ECC signing specifications. Note: The created resource must be destroyed by calling OH_CryptoEccSignatureSpec_Destroy.
OH_Crypto_ErrCode OH_CryptoEccSignatureSpec_GetRAndS(OH_CryptoEccSignatureSpec *spec, Crypto_DataBlob *r, Crypto_DataBlob *s)	Obtains the r and s values of an ECC signature. Note: After the use is complete, the memory for storing the r and s parameters must be released by calling OH_Crypto_FreeDataBlob.
OH_Crypto_ErrCode OH_CryptoEccSignatureSpec_SetRAndS(OH_CryptoEccSignatureSpec *spec, Crypto_DataBlob *r, Crypto_DataBlob *s)	Sets the r and s values of an ECC signature.
OH_Crypto_ErrCode OH_CryptoEccSignatureSpec_Encode(OH_CryptoEccSignatureSpec *spec, Crypto_DataBlob *out)	Encodes ECC signing specifications into a signature in DER format. Note: After the use is complete, the memory for storing the out parameter must be released by calling OH_Crypto_FreeDataBlob.
void OH_CryptoEccSignatureSpec_Destroy(OH_CryptoEccSignatureSpec *spec)	Destroys ECC signing specifications.

Enum Description

CryptoSignature_ParamType

enum CryptoSignature_ParamType

Description

Enumerates the types of signature verification parameters.

Since: 12

Enum Item	Description
CRYPTO_PSS_MD_NAME_STR = 100	MD algorithm used with the PSS padding mode in RSA.
CRYPTO_PSS_MGF_NAME_STR = 101	Mask generation algorithm used with the PSS padding mode in RSA. Currently, only MGF1 is supported.
CRYPTO_PSS_MGF1_NAME_STR = 102	MD parameters for the MGF1 mask generation used with the PSS padding mode in RSA.
CRYPTO_PSS_SALT_LEN_INT = 103	Length of the salt in bytes used with the PSS padding mode in RSA.
CRYPTO_PSS_TRAILER_FIELD_INT = 104	Trailer field used in the encoding operation when PSS padding mode is used in RSA. The value is 1.
CRYPTO_SM2_USER_ID_DATABLOB = 105	User ID field in SM2.

Function Description

OH_CryptoVerify_Create()

OH_Crypto_ErrCode OH_CryptoVerify_Create(const char *algoName, OH_CryptoVerify **verify)

Description

Creates a Verify instance for signature verification.
Note: The created resource must be destroyed by calling OH_CryptoVerify_Destroy.

Since: 12

Parameters

Name	Description
const char *algoName	Pointer to the algorithm used to generate the Verify instance. For example, RSA1024|PKCS1|SHA256.
OH_CryptoVerify **verify	Pointer to the Verify instance created.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_INVALID_PARAMS: A parameter is invalid. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

OH_CryptoVerify_Init()

OH_Crypto_ErrCode OH_CryptoVerify_Init(OH_CryptoVerify *ctx, OH_CryptoPubKey *pubKey)

Description

Initializes a Verify instance by using the public key.

Since: 12

Parameters

Name	Description
OH_CryptoVerify *ctx	Pointer to the Verify instance.
OH_CryptoPubKey *pubKey	Pointer to the public key.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_INVALID_PARAMS: A parameter is invalid. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

Reference

OH_CryptoVerify_Update

OH_CryptoVerify_Final

OH_CryptoVerify_Update()

OH_Crypto_ErrCode OH_CryptoVerify_Update(OH_CryptoVerify *ctx, Crypto_DataBlob *in)

Description

Updates the data to be verified.

Since: 12

Parameters

Name	Description
OH_CryptoVerify *ctx	Pointer to the Verify instance.
Crypto_DataBlob *in	Pointer to the data to pass in.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_INVALID_PARAMS: A parameter is invalid. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_INVALID_CALL: Invalid function call. It is supported since API version 26.0.0. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

Reference

OH_CryptoVerify_Init

OH_CryptoVerify_Final

OH_CryptoVerify_Final()

bool OH_CryptoVerify_Final(OH_CryptoVerify *ctx, Crypto_DataBlob *in, Crypto_DataBlob *signData)

Description

Verifies the signature of the data.

Since: 12

Parameters

Name	Description
OH_CryptoVerify *ctx	Pointer to the Verify instance.
Crypto_DataBlob *in	Pointer to the data passed in.
Crypto_DataBlob *signData	Pointer to the signature data.

Returns

Type	Description
bool	Whether the signature verification is successful. The value true indicates that the signature verification is successful, and the value false indicates that the signature verification fails.

Reference

OH_CryptoVerify_Init

OH_CryptoVerify_Update

OH_CryptoVerify_Recover()

OH_Crypto_ErrCode OH_CryptoVerify_Recover(OH_CryptoVerify *ctx, Crypto_DataBlob *signData, Crypto_DataBlob *rawSignData)

Description

Restores the raw signature data.
Note: After the use is complete, the memory for storing the rawSignData parameter must be released by calling OH_Crypto_FreeDataBlob.

Since: 12

Parameters

Name	Description
OH_CryptoVerify *ctx	Pointer to the Verify instance.
Crypto_DataBlob *signData	Pointer to the signature data.
Crypto_DataBlob *rawSignData	Pointer to the raw data restored.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_INVALID_PARAMS: A parameter is invalid. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_INVALID_CALL: Invalid function call. It is supported since API version 26.0.0. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

OH_CryptoVerify_GetAlgoName()

const char *OH_CryptoVerify_GetAlgoName(OH_CryptoVerify *ctx)

Description

Obtains the signature verification algorithm.

Since: 12

Parameters

Name	Description
OH_CryptoVerify *ctx	Pointer to the Verify instance.

Returns

Type	Description
const char *	Signature verification algorithm obtained.

OH_CryptoVerify_SetParam()

OH_Crypto_ErrCode OH_CryptoVerify_SetParam(OH_CryptoVerify *ctx, CryptoSignature_ParamType type, Crypto_DataBlob *value)

Description

Sets a signature verification parameter.

Since: 12

Parameters

Name	Description
OH_CryptoVerify *ctx	Pointer to the Verify instance.
CryptoSignature_ParamType type	Name of the signature verification parameter to set.
Crypto_DataBlob *value	Pointer to the value of the signature verification parameter to set.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_INVALID_PARAMS: A parameter is invalid. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

OH_CryptoVerify_GetParam()

OH_Crypto_ErrCode OH_CryptoVerify_GetParam(OH_CryptoVerify *ctx, CryptoSignature_ParamType type, Crypto_DataBlob *value)

Description

Obtains a signature verification parameter.
Note: After the use is complete, the memory for storing the value parameter must be released by calling OH_Crypto_FreeDataBlob.

Since: 12

Parameters

Name	Description
OH_CryptoVerify *ctx	Pointer to the Verify instance.
CryptoSignature_ParamType type	Name of the signature verification parameter to obtain.
Crypto_DataBlob *value	Pointer to the parameter value obtained.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_INVALID_PARAMS: A parameter is invalid. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

OH_CryptoVerify_Destroy()

void OH_CryptoVerify_Destroy(OH_CryptoVerify *ctx)

Description

Destroys a Verify instance.

Since: 12

Parameters

Name	Description
OH_CryptoVerify *ctx	Pointer to the Verify instance.

OH_CryptoSign_Create()

OH_Crypto_ErrCode OH_CryptoSign_Create(const char *algoName, OH_CryptoSign **sign)

Description

Creates a signature instance based on the given algorithm name.
Note: The created resource must be destroyed by calling OH_CryptoSign_Destroy.

Since: 20

Parameters

Name	Description
const char *algoName	Pointer to the algorithm used to generate the signature instance. For example, RSA|PKCS1|SHA384 or ECC|SHA384.
OH_CryptoSign **sign	Pointer to the signature instance.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_PARAMETER_CHECK_FAILED: The parameter check failed. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

OH_CryptoSign_Init()

OH_Crypto_ErrCode OH_CryptoSign_Init(OH_CryptoSign *ctx, OH_CryptoPrivKey *privKey)

Description

Initializes a signature instance.

Since: 20

Parameters

Name	Description
OH_CryptoSign *ctx	Pointer to the signature instance.
OH_CryptoPrivKey *privKey	Pointer to the private key.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_PARAMETER_CHECK_FAILED: The parameter check failed. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

Reference

OH_CryptoSign_Update

OH_CryptoSign_Final

OH_CryptoSign_Update()

OH_Crypto_ErrCode OH_CryptoSign_Update(OH_CryptoSign *ctx, const Crypto_DataBlob *in)

Description

Updates the data to be signed.

Since: 20

Parameters

Name	Description
OH_CryptoSign *ctx	Pointer to the signature instance.
const Crypto_DataBlob *in	Pointer to the data to be signed.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_PARAMETER_CHECK_FAILED: The parameter check failed. CRYPTO_INVALID_CALL: Invalid function call. It is supported since API version 26.0.0. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

Reference

OH_CryptoSign_Init

OH_CryptoSign_Final

OH_CryptoSign_Final()

OH_Crypto_ErrCode OH_CryptoSign_Final(OH_CryptoSign *ctx, const Crypto_DataBlob *in, Crypto_DataBlob *out)

Description

Finalizes the signing operation.
Note: After the use is complete, the memory for storing the out parameter must be released by calling OH_Crypto_FreeDataBlob.

Since: 20

Parameters

Name	Description
OH_CryptoSign *ctx	Pointer to the signature instance.
const Crypto_DataBlob *in	Pointer to the data to be signed.
Crypto_DataBlob *out	Pointer to the signing result.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_PARAMETER_CHECK_FAILED: The parameter check failed. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

Reference

OH_CryptoSign_Init

OH_CryptoSign_Update

OH_CryptoSign_GetAlgoName()

const char *OH_CryptoSign_GetAlgoName(OH_CryptoSign *ctx)

Description

Obtains the algorithm name of a signature instance.

Since: 20

Parameters

Name	Description
OH_CryptoSign *ctx	Pointer to the signature instance.

Returns

Type	Description
const char *	Algorithm name of the signature instance.

OH_CryptoSign_SetParam()

OH_Crypto_ErrCode OH_CryptoSign_SetParam(OH_CryptoSign *ctx, CryptoSignature_ParamType type, const Crypto_DataBlob *value)

Description

Sets parameters for a signature instance.

Since: 20

Parameters

Name	Description
OH_CryptoSign *ctx	Pointer to the signature instance.
CryptoSignature_ParamType type	Pointer to the signature parameter type.
const Crypto_DataBlob *value	Pointer to the input data.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_PARAMETER_CHECK_FAILED: The parameter check failed. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

OH_CryptoSign_GetParam()

OH_Crypto_ErrCode OH_CryptoSign_GetParam(OH_CryptoSign *ctx, CryptoSignature_ParamType type, Crypto_DataBlob *value)

Description

Obtains the specified parameter from a signature instance.
Note: After the use is complete, the memory for storing the value parameter must be released by calling OH_Crypto_FreeDataBlob.

Since: 20

Parameters

Name	Description
OH_CryptoSign *ctx	Pointer to the signature instance.
CryptoSignature_ParamType type	Pointer to the signature parameter type.
Crypto_DataBlob *value	Pointer to the output data.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_PARAMETER_CHECK_FAILED: The parameter check failed. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

OH_CryptoSign_Destroy()

void OH_CryptoSign_Destroy(OH_CryptoSign *ctx)

Description

Destroys a signature instance.

Since: 20

Parameters

Name	Description
OH_CryptoSign *ctx	Pointer to the signature instance.

OH_CryptoEccSignatureSpec_Create()

OH_Crypto_ErrCode OH_CryptoEccSignatureSpec_Create(Crypto_DataBlob *eccSignature, OH_CryptoEccSignatureSpec **spec)

Description

Creates ECC signing specifications.
Note: The created resource must be destroyed by calling OH_CryptoEccSignatureSpec_Destroy.

Since: 20

Parameters

Name	Description
Crypto_DataBlob *eccSignature	Pointer to the ECC signature (in DER format). If EccSignature is NULL, an empty ECC signing specification is created.
OH_CryptoEccSignatureSpec **spec	Pointer to the ECC signing specifications.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_PARAMETER_CHECK_FAILED: The parameter check failed. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

OH_CryptoEccSignatureSpec_GetRAndS()

OH_Crypto_ErrCode OH_CryptoEccSignatureSpec_GetRAndS(OH_CryptoEccSignatureSpec *spec, Crypto_DataBlob *r, Crypto_DataBlob *s)

Description

Obtains the r and s values of an ECC signature.
Note: After the use is complete, the memory for storing the r and s parameters must be released by calling OH_Crypto_FreeDataBlob.

Since: 20

Parameters

Name	Description
OH_CryptoEccSignatureSpec *spec	Pointer to the ECC signing specifications.
Crypto_DataBlob *r	Pointer to the r value.
Crypto_DataBlob *s	Pointer to the s value.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_PARAMETER_CHECK_FAILED: The parameter check failed. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

OH_CryptoEccSignatureSpec_SetRAndS()

OH_Crypto_ErrCode OH_CryptoEccSignatureSpec_SetRAndS(OH_CryptoEccSignatureSpec *spec, Crypto_DataBlob *r, Crypto_DataBlob *s)

Description

Sets the r and s values of an ECC signature.

Since: 20

Parameters

Name	Description
OH_CryptoEccSignatureSpec *spec	Pointer to the ECC signing specifications.
Crypto_DataBlob *r	Pointer to the r value.
Crypto_DataBlob *s	Pointer to the s value.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_PARAMETER_CHECK_FAILED: The parameter check failed. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

OH_CryptoEccSignatureSpec_Encode()

OH_Crypto_ErrCode OH_CryptoEccSignatureSpec_Encode(OH_CryptoEccSignatureSpec *spec, Crypto_DataBlob *out)

Description

Encodes ECC signing specifications into a signature in DER format.
Note: After the use is complete, the memory for storing the out parameter must be released by calling OH_Crypto_FreeDataBlob.

Since: 20

Parameters

Name	Description
OH_CryptoEccSignatureSpec *spec	Pointer to the ECC signing specifications.
Crypto_DataBlob *out	Pointer to the output data.

Returns

Type	Description
OH_Crypto_ErrCode	CRYPTO_SUCCESS: The operation is successful. CRYPTO_NOT_SUPPORTED: The operation is not supported. CRYPTO_MEMORY_ERROR: A memory error occurs. CRYPTO_PARAMETER_CHECK_FAILED: The parameter check failed. CRYPTO_OPERATION_ERROR: An error occurs when the API of a third-party algorithm library is called.

OH_CryptoEccSignatureSpec_Destroy()

void OH_CryptoEccSignatureSpec_Destroy(OH_CryptoEccSignatureSpec *spec)

Description

Destroys ECC signing specifications.

Since: 20

Parameters

Name	Description
OH_CryptoEccSignatureSpec *spec	Pointer to the ECC signing specifications.

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