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Corrected RSA block size

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This commit is contained in:
Gunnar Skjold
2024-07-14 21:31:17 +02:00
parent d15992142e
commit 9a4a8a10f2
1 changed files with 1 additions and 1 deletions
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2
lib/CloudConnector/src/CloudConnector.cpp
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@@ -419,7 +419,7 @@ void CloudConnector::update(AmsData& data, EnergyAccounting& ea) {
} }
memset(encryptedBuffer, 0, rsa->len); memset(encryptedBuffer, 0, rsa->len);
int maxlen = rsa->len - 42; int maxlen = rsa->len - 11; // 11 should be the correct padding size for PKCS1
udp.beginPacket(config.hostname,7443); udp.beginPacket(config.hostname,7443);
for(int i = 0; i < pos; i += maxlen) { for(int i = 0; i < pos; i += maxlen) {
int ret = mbedtls_rsa_pkcs1_encrypt(rsa, mbedtls_ctr_drbg_random, &ctr_drbg, MBEDTLS_RSA_PUBLIC, maxlen, (unsigned char*) (clearBuffer+i), encryptedBuffer); int ret = mbedtls_rsa_pkcs1_encrypt(rsa, mbedtls_ctr_drbg_random, &ctr_drbg, MBEDTLS_RSA_PUBLIC, maxlen, (unsigned char*) (clearBuffer+i), encryptedBuffer);