Symbols ![]()
loading...
Files ![]()
loading...
mbedtls_ecdsa_write_signature() function
This function computes the ECDSA signature and writes it to a buffer, serialized as defined in RFC-4492: Elliptic Curve Cryptography (ECC) Cipher Suites for Transport Layer Security (TLS). \warning It is not thread-safe to use the same context in multiple threads. \see ecp.h
Syntax
int mbedtls_ecdsa_write_signature( mbedtls_ecdsa_context *ctx,
mbedtls_md_type_t md_alg,
const unsigned char *hash,
size_t hlen,
unsigned char *sig,
size_t *slen,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng );
Implemented in ![]()
ecdsa.c:688
Return value
\c 0 on success. An \c MBEDTLS_ERR_ECP_XXX, \c MBEDTLS_ERR_MPI_XXX or \c MBEDTLS_ERR_ASN1_XXX error code on failure.
Notes
The deterministic version is used if #MBEDTLS_ECDSA_DETERMINISTIC is defined. For more information, see RFC-6979: Deterministic Usage of the Digital Signature Algorithm (DSA) and Elliptic Curve Digital Signature Algorithm (ECDSA). If the bitlength of the message hash is larger than the bitlength of the group order, then the hash is truncated as defined in Standards for Efficient Cryptography Group (SECG): SEC1 Elliptic Curve Cryptography, section 4.1.3, step 5.
Related Functions
Found 15 other functions taking a ![]()
mbedtls_ecp_keypair
argument:
Function
Description
This function frees the components of a key pair.
This function frees an ECDSA context.
This function initializes an ECDSA context.
This function initializes a key pair as an invalid one.
This function sets up an ECDSA context from an EC key pair. \see ecp.h
This function computes the ECDSA signature and writes it to a buffer, in a restartable way. \see \c mbedtls_ecdsa_write_signature()
This function reads and verifies an ECDSA signature. \see ecp.h
This function reads and verifies an ECDSA signature, in a restartable way. \see \c mbedtls_ecdsa_read_signature()
This function checks that the keypair objects \p pub and \p prv have the same group and the same public point, and that the private key in \p prv is consistent with the public key.
This function sets up an ECDH context from an EC key. It is used by clients and servers in place of the ServerKeyEchange for static ECDH, and imports ECDH parameters from the EC key information of a certificate. \see ecp.h
This function generates an ECDSA keypair on the given curve. \see ecp.h
This function generates an ECP key.