# /Users/engelen/Projects/gsoap/plugin/smdevp.c File Reference

`#include "smdevp.h"`

Include dependency graph for smdevp.c:

## Functions

int | soap_smd_send (struct soap *soap, const char *buf, size_t len)
| Callback to intercept messages for digest or signature computation.
size_t | soap_smd_recv (struct soap *soap, char *buf, size_t len)
| Dummy callback to avoid read operations from blocking.
int | soap_smd_check (struct soap *soap, struct soap_smd_data *data, int err, const char *msg)
| Check result of init/update/final smdevp engine operations.
size_t | soap_smd_size (int alg, const void *key)
| Returns the number of octets needed to store the digest or signature returned by soap_smd_end.
int | soap_smd_begin (struct soap *soap, int alg, const void *key, int keylen)
| Initiates a digest or signature computation.
int | soap_smd_end (struct soap *soap, char *buf, int *len)
| Completes a digest or signature computation.
int | soap_smd_init (struct soap *soap, struct soap_smd_data *data, int alg, const void *key, int keylen)
| Initiates a (signed) digest computation.
int | soap_smd_update (struct soap *soap, struct soap_smd_data *data, const char *buf, size_t len)
| Updates (signed) digest computation with message part.
int | soap_smd_final (struct soap *soap, struct soap_smd_data *data, char *buf, int *len)
| Finalizes (signed) digest computation and returns digest or signature.

## Function Documentation

int soap_smd_begin | ( | struct soap * | soap,
|  | int | alg,
|  | const void * | key,
|  | int | keylen
| ) |

Initiates a digest or signature computation.

Parameters:

  | soap | context
  `[in]` | alg | is the digest or signature (sign/verification) algorithm used
  `[in]` | key | is a HMAC key or pointer to EVP_PKEY object or NULL for digests
  `[in]` | keylen | is the length of the HMAC key or 0

Returns:
  SOAP_OK, SOAP_EOM, or SOAP_SSL_ERROR

int soap_smd_check | ( | struct soap * | soap,
|  | struct soap_smd_data * | data,
|  | int | err,
|  | const char * | msg
| ) | `[static]`

Check result of init/update/final smdevp engine operations.

Parameters:

  | soap | context
  `[in,out]` | data | smdevp engine context
  `[in]` | err | OpenSSL error value
  `[in]` | msg | error message

Returns:
  SOAP_OK or SOAP_SSL_ERROR

int soap_smd_end | ( | struct soap * | soap,
|  | char * | buf,
|  | int * | len
| ) |

Completes a digest or signature computation.

Parameters:

  | soap | context
  `[in]` | buf | contains signature for verification (when using a SOAP_SMD_VRFY algorithm)
  `[out]` | buf | is populated with the digest or signature
  `[in]` | len | points to length of signature to verify (when using a SOAP_SMD_VRFY algorithm)
  `[out]` | len | points to length of stored digest or signature (when not NULL)

Returns:
  SOAP_OK, SOAP_USER_ERROR, or SOAP_SSL_ERROR

int soap_smd_final | ( | struct soap * | soap,
|  | struct soap_smd_data * | data,
|  | char * | buf,
|  | int * | len
| ) |

Finalizes (signed) digest computation and returns digest or signature.

Parameters:

  | soap | context
  `[in,out]` | data | smdevp engine context
  `[in]` | buf | contains signature for verification (SOAP_SMD_VRFY algorithms)
  `[out]` | buf | is populated with the digest or signature
  `[in]` | len | points to length of signature to verify (SOAP_SMD_VRFY algorithms)
  `[out]` | len | points to length of stored digest or signature (pass NULL if you are not interested in this value)

Returns:
  SOAP_OK or SOAP_SSL_ERROR

int soap_smd_init | ( | struct soap * | soap,
|  | struct soap_smd_data * | data,
|  | int | alg,
|  | const void * | key,
|  | int | keylen
| ) |

Initiates a (signed) digest computation.

Parameters:

  | soap | context
  `[in,out]` | data | smdevp engine context
  `[in]` | alg | is algorithm to use
  `[in]` | key | is key to use or NULL for digests
  `[in]` | keylen | is length of HMAC key (when provided)

Returns:
  SOAP_OK or SOAP_SSL_ERROR

size_t soap_smd_recv | ( | struct soap * | soap,
|  | char * | buf,
|  | size_t | len
| ) | `[static]`

Dummy callback to avoid read operations from blocking.

Returns:
  0

int soap_smd_send | ( | struct soap * | soap,
|  | const char * | buf,
|  | size_t | len
| ) | `[static]`

Callback to intercept messages for digest or signature computation.

Parameters:

  | soap | context
  `[in]` | buf | message
  `[in]` | len | message length

Returns:
  SOAP_OK or SOAP_SSL_ERROR

size_t soap_smd_size | ( | int | alg,
|  | const void * | key
| ) |

Returns the number of octets needed to store the digest or signature returned by soap_smd_end.

Parameters:

  `[in]` | alg | is the digest or signature algorithm to be used
  `[in]` | key | is a pointer to an EVP_PKEY object for RSA/DSA signatures or NULL for digests and HMAC

Returns:
  size_t number of octets that is needed to hold digest or signature

See also:
  soap_smd_end

The values returned for digests are SOAP_SMD_MD5_SIZE and SOAP_SMD_SHA1_SIZE.

int soap_smd_update | ( | struct soap * | soap,
|  | struct soap_smd_data * | data,
|  | const char * | buf,
|  | size_t | len
| ) |

Updates (signed) digest computation with message part.

Parameters:

  | soap | context
  `[in,out]` | data | smdevp engine context
  `[in]` | buf | contains message part
  `[in]` | len | of message part

Returns:
  SOAP_OK or SOAP_SSL_ERROR