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Add additional sanity checks to RSA verification code.

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Also, make algorithm unsigned int in most places.

BUG=chrome-os-partner:701
TEST=existing RSA verification tests still pass

Review URL: http://codereview.chromium.org/3136017
This commit is contained in:
Gaurav Shah
2010-08-17 15:48:22 -07:00
parent 138acfe1ba
commit 47b593d849
10 changed files with 61 additions and 37 deletions
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15
firmware/lib/cryptolib/include/rsa.h
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@@ -27,7 +27,7 @@ typedef struct RSAPublicKey {
uint32_t n0inv; /* -1 / n[0] mod 2^32 */
uint32_t* n; /* modulus as little endian array */
uint32_t* rr; /* R^2 as little endian array */
int algorithm; /* Algorithm to use when verifying binaries with the key */
unsigned int algorithm; /* Algorithm to use when verifying with the key */
} RSAPublicKey;
/* Verify a RSA PKCS1.5 signature [sig] of [sig_type] and length [sig_len]
@@ -57,7 +57,7 @@ int RSAVerifyBinary_f(const uint8_t* key_blob,
const uint8_t* buf,
uint64_t len,
const uint8_t* sig,
int algorithm);
unsigned int algorithm);
/* Version of RSAVerifyBinary_f() where instead of the raw binary blob
* of data, its digest is passed as the argument. */
@@ -65,14 +65,17 @@ int RSAVerifyBinaryWithDigest_f(const uint8_t* key_blob,
const RSAPublicKey* key,
const uint8_t* digest,
const uint8_t* sig,
int algorithm);
unsigned int algorithm);
/* ----Some additional utility functions for RSA.---- */
/* Returns the size of a pre-processed RSA public key in bytes with algorithm
* [algorithm]. */
int RSAProcessedKeySize(int algorithm);
/* Returns the size of a pre-processed RSA public key in
* [out_size] with the algorithm [algorithm].
*
* Returns 1 on success, 0 on failure.
*/
int RSAProcessedKeySize(unsigned int algorithm, int* out_size);
/* Allocate a new RSAPublicKey structure and initialize its pointer fields to
* NULL */