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pkwrite: add new internal symbol for the max supported public key DER length

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This is also used in pk_psa_sign() to properly size buffers holding
the public key.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti
2024-03-20 17:10:35 +01:00
parent 027796c0cc
commit 144c27b0f3
2 changed files with 14 additions and 7 deletions
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9
library/pkwrite.h
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@ -109,4 +109,13 @@
#define MBEDTLS_PK_ECP_PRV_DER_MAX_BYTES 0
#endif /* MBEDTLS_PK_HAVE_ECC_KEYS */
/* Define the maximum available public key DER length based on the supported
* key types (EC and/or RSA). */
#if (MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES > MBEDTLS_PK_ECP_PUB_DER_MAX_BYTES)
#define MBEDTLS_PK_WRITE_PUBKEY_MAX_SIZE MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES
#else
#define MBEDTLS_PK_WRITE_PUBKEY_MAX_SIZE MBEDTLS_PK_ECP_PUB_DER_MAX_BYTES
#endif
#endif /* MBEDTLS_PK_WRITE_H */