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psa_util: add raw<->DER ECDSA conversion functions

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Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
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Valerio Setti
2024-01-08 16:49:17 +01:00
parent aa3fa98bc4
commit 75501f5ede
2 changed files with 241 additions and 0 deletions
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36
include/mbedtls/psa_util.h
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@@ -176,6 +176,42 @@ static inline mbedtls_md_type_t mbedtls_md_type_from_psa_alg(psa_algorithm_t psa
return (mbedtls_md_type_t) (psa_alg & PSA_ALG_HASH_MASK);
}
#if defined(MBEDTLS_ASN1_WRITE_C)
/** Convert an ECDSA signature from raw format to DER ASN.1 one.
*
* \param raw Buffer that contains the signature in raw format.
* \param raw_len Length of raw buffer in bytes
* \param[out] der Buffer that will be filled with the converted DER
* output. It can overlap with raw buffer.
* \param der_size Size of the output der buffer in bytes.
* \param[out] der_len On success it contains the amount of valid data
* (in bytes) written to der buffer. It's undefined
* in case of failure.
* \param bits Size of each raw coordinate in bits.
*/
int mbedtls_ecdsa_raw_to_der(const unsigned char *raw, size_t raw_len,
unsigned char *der, size_t der_size, size_t *der_len,
size_t bits);
#endif /* MBEDTLS_ASN1_WRITE_C */
#if defined(MBEDTLS_ASN1_PARSE_C)
/** Convert an ECDSA signature from DER ASN.1 format to raw.
*
* \param der Buffer that contains the signature in DER format.
* \param der_len Size of the der buffer in bytes.
* \param[out] raw Buffer that will be filled with the converted raw
* signature. It can overlap with der buffer.
* \param raw_size Size of the raw buffer in bytes.
* \param[out] raw_len On success it is updated with the amount of valid
* data (in bytes) written to raw buffer. It's undefined
* in case of failure.
* \param bits Size of each raw coordinate in bits.
*/
int mbedtls_ecdsa_der_to_raw(const unsigned char *der, size_t der_len,
unsigned char *raw, size_t raw_size, size_t *raw_len,
size_t bits);
#endif /* MBEDTLS_ASN1_PARSE_C */
/**@}*/
#endif /* MBEDTLS_PSA_CRYPTO_C */