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Save ~3KB of RAM by moving constant strings out of RODATA #46

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merged 1 commit into from
Jun 20, 2017
Merged

Save ~3KB of RAM by moving constant strings out of RODATA #46

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2 changes: 1 addition & 1 deletion ssl/crypto_misc.h
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Original file line number Diff line number Diff line change
Expand Up @@ -127,7 +127,7 @@ int x509_verify(const CA_CERT_CTX *ca_cert_ctx, const X509_CTX *cert,
#endif
#ifdef CONFIG_SSL_FULL_MODE
void x509_print(const X509_CTX *cert, CA_CERT_CTX *ca_cert_ctx);
const char * x509_display_error(int error);
const char * x509_display_error(int error, char *buff);
#endif

/**************************************************************************
Expand Down
25 changes: 21 additions & 4 deletions ssl/os_port.h
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Original file line number Diff line number Diff line change
Expand Up @@ -68,10 +68,6 @@ extern "C" {
#undef putc
#endif
#define putc(x, f) ets_putc(x)
#ifdef printf
#undef printf
#endif
#define printf(...) ets_printf(__VA_ARGS__)

#define SOCKET_READ(A,B,C) ax_port_read(A,B,C)
#define SOCKET_WRITE(A,B,C) ax_port_write(A,B,C)
Expand Down Expand Up @@ -123,6 +119,27 @@ static inline uint8_t pgm_read_byte(const void* addr) {
#define ax_array_read_u8(x, y) pgm_read_byte((x)+(y))
#endif //WITH_PGM_READ_HELPER

#ifdef printf
#undef printf
#endif
//#define printf(...) ets_printf(__VA_ARGS__)
#define PSTR(s) (__extension__({static const char __c[] PROGMEM = (s); &__c[0];}))
#define PGM_VOID_P const void *
static inline void* memcpy_P(void* dest, PGM_VOID_P src, size_t count) {
const uint8_t* read = (const uint8_t*)(src);
uint8_t* write = (uint8_t*)(dest);

while (count)
{
*write++ = pgm_read_byte(read++);
count--;
}

return dest;
}
#define printf(fmt, ...) do { static const char fstr[] PROGMEM = fmt; char rstr[sizeof(fmt)]; memcpy_P(rstr, fstr, sizeof(rstr)); ets_printf(rstr, ##__VA_ARGS__); } while (0)
#define strcpy_P(dst, src) do { static const char fstr[] PROGMEM = src; memcpy_P(dst, fstr, sizeof(src)); } while (0)

#elif defined(WIN32)

/* Windows CE stuff */
Expand Down
34 changes: 17 additions & 17 deletions ssl/tls1.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2287,58 +2287,57 @@ void DISPLAY_STATE(SSL *ssl, int is_send, uint8_t state, int not_ok)
if (!IS_SET_SSL_FLAG(SSL_DISPLAY_STATES))
return;

printf(not_ok ? "Error - invalid State:\t" : "State:\t");
printf(is_send ? "sending " : "receiving ");
if (not_ok) printf("Error - invalid State:\t");
else printf("State:\t");
if (is_send) printf("sending ");
else printf("receiving ");

switch (state)
{
case HS_HELLO_REQUEST:
str = "Hello Request (0)";
printf("Hello Request (0)\n");
break;

case HS_CLIENT_HELLO:
str = "Client Hello (1)";
printf("Client Hello (1)\n");
break;

case HS_SERVER_HELLO:
str = "Server Hello (2)";
printf("Server Hello (2)\n");
break;

case HS_CERTIFICATE:
str = "Certificate (11)";
printf("Certificate (11)\n");
break;

case HS_SERVER_KEY_XCHG:
str = "Certificate Request (12)";
printf("Certificate Request (12)\n");
break;

case HS_CERT_REQ:
str = "Certificate Request (13)";
printf("Certificate Request (13)\n");
break;

case HS_SERVER_HELLO_DONE:
str = "Server Hello Done (14)";
printf("Server Hello Done (14)\n");
break;

case HS_CERT_VERIFY:
str = "Certificate Verify (15)";
printf("Certificate Verify (15)\n");
break;

case HS_CLIENT_KEY_XCHG:
str = "Client Key Exchange (16)";
printf("Client Key Exchange (16)\n");
break;

case HS_FINISHED:
str = "Finished (16)";
printf("Finished (16)\n");
break;

default:
str = "Error (Unknown)";

printf("Error (Unknown)\n");
break;
}

printf("%s\n", str);
}

/**
Expand Down Expand Up @@ -2383,7 +2382,8 @@ EXP_FUNC void STDCALL ssl_display_error(int error_code)
/* X509 error? */
if (error_code < SSL_X509_OFFSET)
{
printf("%s\n", x509_display_error(error_code - SSL_X509_OFFSET));
char buff[64];
printf("%s\n", x509_display_error(error_code - SSL_X509_OFFSET, buff));
return;
}

Expand Down
44 changes: 29 additions & 15 deletions ssl/x509.c
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Original file line number Diff line number Diff line change
Expand Up @@ -225,8 +225,9 @@ int x509_new(const uint8_t *cert, int *len, X509_CTX **ctx)
if (ret)
{
#ifdef CONFIG_SSL_FULL_MODE
char buff[64];
printf("Error: Invalid X509 ASN.1 file (%s)\n",
x509_display_error(ret));
x509_display_error(ret, buff));
#endif
x509_free(x509_ctx);
*ctx = NULL;
Expand Down Expand Up @@ -821,9 +822,10 @@ void x509_print(const X509_CTX *cert, CA_CERT_CTX *ca_cert_ctx)
if (ca_cert_ctx)
{
int pathLenConstraint = 0;
char buff[64];
printf("Verify:\t\t\t\t%s\n",
x509_display_error(x509_verify(ca_cert_ctx, cert,
&pathLenConstraint)));
&pathLenConstraint), buff));
}

#if 0
Expand All @@ -840,45 +842,57 @@ void x509_print(const X509_CTX *cert, CA_CERT_CTX *ca_cert_ctx)
TTY_FLUSH();
}

const char * x509_display_error(int error)
const char * x509_display_error(int error, char *buff)
{
switch (error)
{
case X509_OK:
return "Certificate verify successful";
strcpy_P(buff, "Certificate verify successful");
return buff;

case X509_NOT_OK:
return "X509 not ok";
strcpy_P(buff, "X509 not ok");
return buff;

case X509_VFY_ERROR_NO_TRUSTED_CERT:
return "No trusted cert is available";
strcpy_P(buff, "No trusted cert is available");
return buff;

case X509_VFY_ERROR_BAD_SIGNATURE:
return "Bad signature";
strcpy_P(buff, "Bad signature");
return buff;

case X509_VFY_ERROR_NOT_YET_VALID:
return "Cert is not yet valid";
strcpy_P(buff, "Cert is not yet valid");
return buff;

case X509_VFY_ERROR_EXPIRED:
return "Cert has expired";
strcpy_P(buff, "Cert has expired");
return buff;

case X509_VFY_ERROR_SELF_SIGNED:
return "Cert is self-signed";
strcpy_P(buff, "Cert is self-signed");
return buff;

case X509_VFY_ERROR_INVALID_CHAIN:
return "Chain is invalid (check order of certs)";
strcpy_P(buff, "Chain is invalid (check order of certs)");
return buff;

case X509_VFY_ERROR_UNSUPPORTED_DIGEST:
return "Unsupported digest";
strcpy_P(buff, "Unsupported digest");
return buff;

case X509_INVALID_PRIV_KEY:
return "Invalid private key";
strcpy_P(buff, "Invalid private key");
return buff;

case X509_VFY_ERROR_BASIC_CONSTRAINT:
return "Basic constraint invalid";
strcpy_P(buff, "Basic constraint invalid");
return buff;

default:
return "Unknown";
strcpy_P(buff, "Unknown");
return buff;
}
}
#endif /* CONFIG_SSL_FULL_MODE */
Expand Down